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EVERYDAY SCIENCE PAPER FPSC CSS BPS17 GK 2000-2015 GOV.


FEDERAL PUBLIC SERVICE COMMISSION Everyday Science Paper

COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS IN BPS-17 UNDER THE FEDERAL GOVERNMENT, 2000

GENERAL KNOWLEDGE PAPER-I EVERY DAY SCIENCE

TIME ALLOWED: 100 MINUTES…………….……Maximum Marks: 50

NOTE:

  • Attempt ONLY FIVE questions. All questions carry EQUAL marks.
  • Extra attempt of any question or any part of the attempted question will not be considered.

Q1. Write comprehensive notes on any TWO of the following: (5,5)

  • Contribution of Muslim scientists in the field of biology.
  • Water pollution.
  • Semiconductors.

Q2. Describe the various type of movements of the earth? What are the effects of these movements? Draw simple diagrams to illustrate your answer. (4,6)

Q3. Explain the following using suitable examples. ( 2 each)

  • Feedback mechanism of human system.
  • Eco-system
  • Troposphere
  • Carbon cycle
  • Meningitis

4. What is excretion? Name the excretory organs in man. Describe the structure and function of the human kidney for the excretion of urine. (1,2,7)

Q5. Describe the Principle, construction and working of a telephone? (2,4,4)

Q6. What are latitudes and longitudes? How can the central line of latitude be used to find the location of a place? (4,6)

  • Differentiate between:
  • Cardiac Muscles and Skeletal Muscles.
  • Haze and Smog.
  • Enzyme and Hormone.
  • Sedimentary Rocks and Igneous Rocks.
  • Producers and Consumers.

8.  Define the following terms: ( 1 each)

  • RAM
  • Byte
  • Mouse
  • Icons
  • Software
  • Control Unit
  • LAN
  • Modem
  • ALU
  • Registers.

Q9. Discuss the structure of a typical animal cell in detail. 10) Q10. Fill in the blanks with appropriate words: ( 1 each)

  • Monomer of proteins are                                                           .
  • Water transport in plants occurs within                                       .
  • Underground horizontal stems are called                                    .
  • In the eye, only                               contain receptors for light energy.
  • Plant                                   control plant responses to environmental stimuli.
  •                             are often called the power houses of the cell.
  • The rate at which a current changes direction is called its                      .
  • The energy of electrons at the negative terminal of a battery is called

                                         .

  •                                    _is the smallest planet of the solar system.
  • Diamond is an allotropic form of the element                                         .

Q11. Which are plastics? Name their different types and processes by which they are manufactured. Discuss the impact of the use of plastics on the environment.

Q12. Which of the following statements are False and which are True: ( 1 each)

  • In the circulatory system two pulmonary arteries take blood from the left ventricle to the lungs.
  • Anaphase is the stage of mitosis during which the daughter chromosomes move towards the poles.
  • The Motor neurons carry nerve impulses from the central nervous system to the effectors.
  • Cochlea is a part of the middle ear.

(e) Tides happen due to the moon’s gravitational pull.

  • Heavy water contains salts of Calcium and Magnesium.
  • All non-metals exist in gaseous state.
  • A parachute can be used by a spaceman to help in landing on the moon.
  • The gemstones Ruby and sapphires are composed of Aluminum Oxide.
  • In a chemical battery chemical energy ions directly converted into mechanical energy.

Q13. Choose the correct answers. Don’t reproduce the questions. ( 1 each)

  • Speed of the wind is measured by:

(a) Barometer (b) Hygrometer (c) perimeter

(d) Anemometer (e) None of these.

  •                             connects the muscle with the bone.

(a) Cartilage (b) Ligament (c) Tendon (d) Disc (e) None of these.

  • Polio is caused by a:

(a) Bacterial (b) Virus (c) Fungus (d) Deficiency of vitamin (e) none of these.

  • The coldest planet of the solar system is:

(a) Earth (b) Venus (c) Mars (d) Pluto (e) None of these

  •                                   is a vitamin:

(a) Citric acid (b) Tartaric acid (c) Ascorbic acid (d) Acetic acid (d) none of there

  • An eggshell is composed of:

(a) Iron (b) Starch (c) Carbon (d) Protein (e) None of these.

  • The most abundant element in the earth’s crust is:

(a) Nitrogen (b) Silicon (c) Carbon (d) Oxygen (e) None of these

  • The main constituent of Biogas is:

(a) Methane (b) Hydrogen (c) Oxygen (d) Carbon dioxide (e) None of these.

  • Stalagmites are deposits of :

(a) Calcium oxide (b) Calcium sulphate (c) Calcium hydroxide (d) Calcium carbonate (e) Mixture of all salts.

  • Gigantism is the result of:

(a) Hypothyroidism (b) Recessive gene (c) Hyper pituitarism (d) Vitamin D deficiency (e) None of these.

Q14. What are the causes of Earthquakes: How have earthquakes helped in deciphering the internal structure of the earth? (4,6)

Q15. What is the endocrine system? Write the names and function of any eight endocrine glands. (2,8)

Everyday Science Paper FEDERAL PUBLIC SERVICE COMMISSION

COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS IN BPS-17 UNDER THE FEDERAL GOVERNMENT, 2001

GENERAL KNOWLEDGE PAPER-I EVERY DAY SCIENCE

TIME ALLOWED: 100 MINUTES…………….……Maximum Marks: 50

NOTE:

  • Attempt ONLY FIVE questions. All questions carry EQUAL marks.
  • Extra attempt of any question or any part of the attempted question will not be considered.

Q. 1. (a) What were the special characteristics of Muslim Scientists?

(b) What were the contributions of the following Muslim Scientists:

  • Umar AI-Khayyam.
  • Abu Ali Sina
  • ibn Hayyan (iv). Jhn al Baitar

(v) Zakariya Al-Razi.

Q. 2. (a) Differentiate clearly between Cyclone, Huriicane and tornado. (b)
  • Name two minerals which ate exported from Pakistan.
  • Name some gem-minerals used in Jewellery.
  • What is dead sea.
  • Why does the Sun appears orange-red at the time of Sunrise and Sunset.
  • Why does the total Eclipse can happen only at the new Moon.
Q. 3.
  • Name popular farms of Energy. Write five various scientific devices used to convert one type of energy into another form of energy.
  • Write meaning of the following units:
  • Barrel
  • Joule
  • Btu
  • KWh
  • Newton.
Q. 4. Write short notes on any THREE of tiillowing:
  • Synthetic Polymers..
  • Laser.
  • Pesticides
  • Fission and Fusion
  • Pararnagnetism and Diamagnetism.
Q. 5. Write difference between:
  • Microcomputer and minicomputer
  • Main frame and Super computer.
  • Hardware and Software.
  • Byte and Word.
  • Ram and Cache memory.
Q. 6. Describe briefly the principle and working of any TWO of the following:
  • Pressure cocker
  • Television
  • Microwave oven
  • Radar
  • Tape recorder.
Q. 7. Differentiate between:
  • DNA and RNA
  • Brass and Bronze
  • Blood and Lymph
  • Hard water and Heavy water
  • Small pox and Measles
  • Pig iron and Stainless Steel.
  • Alloy and Amalgum
  • Isotopes and Isobars
  • Artery and Vein
  • Barrage and Dam.

Q. 8. Explain the scientific reasons for the following:

  • It is not advisable to sleep under trees during the night.
  • Water boils quicker on mountains.
  • Rainbow is produced in the sky after rain fall and sunlight.
  • Water remains cool in a Earthenware pitcher.
  • Milk is considered as an ideal food.
Q. 9. Which of the following statements are true or false. Only write “True” or “False” in

the answer book. Do not reproduce the statement.

  • Urea is a phosphate fertilizer.
  • Cellulose is a natural polymer. (iii) Magnetite is the ore of copper
  • Malaria is caused by drinking polluted water.
  • The instrument used to measure velocity of wind is Barometer.
  • Our eye is very sensitive to blue light.
  • Sound can not travel through vacuum.
  • Enzymes are biological catalyst.
  • Leprosy is a disorder of Nervous System.
  • Mica is a non-conductor of electricity.
Q.10 What are Endocrine glands? Name any four. From which part of the body are the followings secreted:
  • Insulin
  • Thyroxin
  • Adrenaline
  • Oestrogen
  • Testosterone and
  • Cortisol
Q.11
  • Name the important parts of a Flower.
  • Explain the Pollination and Fertilization processes.
Q.12  Write short notes on any FiVE of the following:
  • Ecosystem
  • CNG
  • PVC
  • Hormones
  • Antibiotics
  • Ceramics
  • Green House Effect
  • Photosynthesis
  • Pasteurization
  • Vaccine.
  • What are the factors of water pollution? What types of diseases are transmitted by using polluted the methods to control pollution of water.
  • Fill in the blanks with appropriate words:
  • The purpose of computer is
  • polio is caused by                      
  • The stalagmite is deposit of
  • Bauxite is one of                       
  • The chemical name of washing soda is
  • The main constituent of Sui gas is                           colour has the shortest wave length.
  •                      colour has the shortest wave length. (viii)Glass is a                                                             (ix)Monomers of protein are                               (x)Ascorbic acid is vitamin                         (xi)The solar system has                     (xii)Aids is caused by                             
  • In a normal resting person the rate of heart heat is
  • The science which deals with heredity is known as
  • In Pakistan Copper mineral is tound in                          
  • The most abundant element in the earth crust is
  •                    is an apparatus used tbr measuring the pressure of gases. (xviii)The smallest branches of an artery lead into tiny blood vessels are called
  • The living part of a plant cc I is composed of a nucleus and                
  • The fastest revolving plant is                

FEDERAL PUBLIC SERVICE COMMISSION

COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS IN BPS-17 UNDER THE FEDERAL GOVERNMENT, 2002

GENERAL KNOWLEDGE PAPER-I EVERY DAY SCIENCE

TIME ALLOWED: 100 MINUTES…………….……Maximum Marks: 50

NOTE:

  • Attempt ONLY FIVE questions. All questions carry EQUAL marks.
  • Extra attempt of any question or any part of the attempted question will not be considered.
  • Write short notes on any two of the following : 5 each

a. Acid Rain b. pesticides c endocrine system

Q.2  Differentiate between any five of the following pairs : (2 each)
  • rotation and revolution of earth
  • monocot and dicot plants
  • pollination and fertilization d umbra and penumbra

(e) nucleus and nucleolus e heavy water and hard water

Q.3  Draw a labeled diagram of human eye, indicating all essential parts, discuss its working (5,5)
  • Fill in the blanks with suitable words : ( 1 each)
  1. Heavenly objects, which resembles stars and emit radio waves are called _ _ _ _
  2. _ _ _ are hot springs that erupt hot water and steam from time to time
  3. Hot liquid rock beneath the earth’s surface is called _ _ _ _
  4. The first simply microscope was invented by _ _ _ _
  5. _ _ _ _ is the power house of the cell
  6. Ability of the air to absorb long heat waves from the earth after allowing the short waves from sun to pass through it is known as _ _ _ _
  7. Computer works on the principle introduced by the Muslim scientist _ _ _ _
  8. Coldest planet of the solar system is _ _ _ _
  9. The rupture of red blood cells is called _ _ _ _
  10. Muslim Scientist Ali ibn Al Tabari is famous for his work on _ _ _ _
  • What is the solar system ? Indicate the position of planet pluto in it. State the characteristics that classify it as : (5,1,4)
  • A planet
  • An asteroid
Q.6  which quantities are measured by the following SI units : (1 each)
  1. Watt
  2. Coulomb
  3. Pascal
  4. Ohm
  5. Kelvin
  6. Joule
  7. meter
  8. Farady
  9. Hertz
  10. Ampere
Q.7  What are minerals ? For most of the part minerals are constituted of eight elements, name any six of them. State the six characteristics that are used to identify minerals
  • Define any five of the following terms using suitable examples :
  1. Polymerization
  2. Ecosystem
  3. Antibiotics
  4. Renewable energy resources
  5. Gene
  6. Software
Q.9 what do you understand by the term “Balanced Diet ? What are its essential constituents ? state the function of each constituent (2,3,5)
  • Which of the following statements are true and which are false (1 each)
  1. Haploid cells result from the process of mitosis
  2. All stars are of the same colour
  3. The left lung has two lobes while the right lung has three lobes
  4. The pulmonary veins return oxygenated blood to the right atrium
  5. Muslim Scientist Ibn Haitham is famous for his work on planets
  6. Our galaxy milky way is shaped like a large thick concave lens with a large central bulge
  7. DNA has a double helix structure while the RNA does not have a double helix structure
  8. The normal temperature of Human Blood is 37 c (98.6 F)
  9. The liver is a part of the gastrointestinal tract
  10. Movement of tectonic plates may cause eruption of a volcano
  • What do the following scientific abbreviations stand for ? ( 1 each)
  1. LASER
  2. RADAR
  3. LPG
  4. PVC
  5. CFC
  6. AIDS
  7. ROM
  8. LAN
  9. WWW
  10. DNA
Q.12  Give brief scientific reasons for any five of the following statements : (2 each)
  1. Lunar eclipse lasts much longer than solar eclipse
  2. Goiter is common in people living in hilly areas
  3. Mixture of ice and salt (sodium chloride) is used as a freezing mixture
  4. Detergents are better cleaning agents compared to soap
  5. Decomposers are important for life on land and water
  6. Places near the sea are cooler in summer and warmer in winter than places farther inland
Q.13  Name ( 1 each )
  1. A disease caused by deficiency of vitamin C
  2. The major fossil fuel impurity
  3. The instrument used to measure degree of humidity
  4. An ore of Zinc
  5. Two most abundant elements present in the sun
  6. The metal atom present in chlorophyll
  7. The gland responsible for the secretion of the hormone estrogen
  8. An element used in the doping of silicon for the preparation of a p-type semiconductor
  9. A synthetic fibre which is a polyamide
  10. Major constituent of Biogas
Q.14  What are fertilizers ? what do you understand by the term NPK fertilizer ? How do fertilizers contribute to water pollution ? (3,1,6)
  • Choose the one alternative the best completes the statement or answer the question ( 1 each )

1). Glycogen is an example of

  1. Carbohydrate
  2. Peptide
  3. Lipid d steroids

Google or Read more past papers of everyday science.

2). The cell structure that controls movements of material into and out of the cell is the

  1. mitochondria
  2. cell membrane
  3. Centriole
  4. golgi body

3). The unit that co-ordinates different devices of the computer system is

  1. ALU
  2. register
  3. control unit
  4. logical instructions

4). _ _ _ _ manages and controls various functions of the computer

  1. in put/out put device
  2. main memory
  3. operating system
  4. both a & b

5). The number of natural satellite orbiting around the planet Mars is

  1. 1
  2. 2
  3. 5
  4. 14

6). _ _ _ _ is an example of mechanical digestion

  1. glycolysis
  2. hydrolysis
  3. Mastication
  4. defecation

7) Botanically a fruit is a/an

a. ripened ovule b..mature stigma

  • ripened ovary
  • fully mature flowering stalk

8). The vocal folds are part of the

  1. nasal cavity
  2. larynx
  3. trachea
  4. laryngopharyn

9). Blood glucose is raised by all of the following except

  1. glycogen
  2. insulin
  3. cortisol
  4. epinephrine

10. The famous book Al-Qanoon was written by the Muslim scientist

a. Jabir-ibn-Ha Error………

5

FEDERAL PUBLIC SERVICE COMMISSION

COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS IN BPS-17 UNDER THE FEDERAL GOVERNMENT, 2005, EVERY DAY SCIENCE.

GENERAL KNOWLEDGE PAPER-I EVERY DAY SCIENCE

TIME ALLOWED: 100 MINUTES…………….……Maximum Marks: 50

NOTE:

  • Attempt ONLY FIVE questions. All questions carry EQUAL marks.
  • Extra attempt of any question or any part of the attempted question will not be considered.

Q1. Write short notes on any TWO of the following: (5 each)

  • Communication Satellite
  • Geo-thermal Energy
  • Ultrasonics
Q2. Write short notes on the life and work of the following: (5 each)
  • AI-Biruni
  • Ibn Al – Haitham
Q3. Name: (1 each)
  • The alloy which consists of copper and tin.
  • The device used to measure radioactivity.
  • The organ in (he human body which is responsible for the digestion of protein only
  • The instrument used to measure very high temperature.
  • The scientist who designed the first internal combustion engine used to burn low grade fuel. (f)The scientist who asserted the earth to be a huge magnet.
  • The metal known as quick silver.
  • The device which converts the chemical energy into electrical energy.
  • The first person to orbit the earth in space.
  • The scientist who discovered water.

Q4-Write briefly about any FIVE of the following: (2each)

  • Shock Waves
  • Sound Barrier
  • Solar Cell
  • Super Fluid
  • Tsunami
  • Photovoltaic Cell
  • Hygrometer
Q5. Which physical quantities are measured by the following units? (1 each)
  • Coulomb
  • Weber
  • Tesla
  • Siemen
  • Rutherford
  • Faraday
  • Angstrom
  • Parsec
  • Degree
  • Steradian
Q6. How do our domestic and industrial activities pollute water? Explain with reference to two important industries of Pakistan. (5,5)

Q7- Which of the following statements are True and which are False: (1 each)

  • To stay in the sunlight while circling the globe at the equator, one has to move with a speed of 1670 km/hour.
  • Infrared waves have more wavelengths than the red colour.
  • liver produces bile which is involved in the breakdown of fats.
  • A secondary cell can be charged again.
  • Nucleic acids are responsible basically for protein synthesis in the human body,
  • The quality of gasoline is checked by its octane number.
  • image in a plane mirror is not laterally inverted.
  • Horse power is the unit of mechanical energy.
  • Sound travels faster in vacuum than in water.
  • Nitrogen is the most occurring element in the human body.
Q8. Differentiate between the following pairs. (2 each)
  • Radiotherapy & Chemotherapy
  • Penumbra & Umbra
  • Springtides & Neaptides
  • Vertebrates &. Invertebrates
  • Fluorescent light & Neon signs

Q9. Fill in the blanks: (1 each) ‘

  1. The variation in the blood flow can be heard with an instrument called      
  2. There is a place in the retina where the light sensitive cells are interrupted by the presence of the optic nerve head. It is known as                    
  3. The study of human population is called    .
  4. Human beings belong to species called         .
  5. defect of eye due to which nearly located objects arc not clearly visible is called      .
  6. About _      _ of the human body consists of water.
  7. All of the oxygen that you breathe has been produced by the splitting of water during             .
  8. The important ore of Chromium is _.
  9. _      acid was discovered by Jabbar bin Hayyan.
  10. The measurement of rainfall is made by an instrument known as _.
Q10. What are the main reasons of water – logging in Pakistan? How does a tube-well reclaim a water logged soil? (5,5)

Q11 . Give scientific reason of the following: (2 each)

  • Pole star is always seen in the north.
  • We never see birds urinating.
  • Pasteurized milk has more nourishment than the ordinary boiled milk.
  • Bees die when they sting human beings.
  • Cloudy nights are usually warmer than the clear ones.
Q12. What are Nuclear reactors? How the Electrical energy is produced by Nuclear Power Plants? Name the devices which convert
  • Mechanical energy into electrical energy
  • Heat energy into mechanical energy
  • Electrical energy into mechanical energy
  • Electrical energy into sound energy
  • Sound energy into electrical energy
Q13. What do the following scientific abbreviations stand for: (1 each)
  • I-1DL
    • McV
    • UHF
    • LED
    • LCD
    • BASIC
    • MASER
    • ETT
    • HST
    • DBS

Q14-Compare the columns A and B and write the correct answer from the Column to the Column A (serial wise) in Column C,

Column A

  1. Gunpowder
  2. Marble
  3. Ozone
  4. Argon
  5. Quartz
  6. Mirage
  7. Gold
  8. Modulation
  9. Length
  10. Solar Energy
Column B
  1. Sulphur dioxide
  2. Fermi
  3. Aqua regia
  4. Beta – Particle
  5. Frequency
  6. Calcium Carbonate
  7. Dobson Units
  8. Silicon dioxide
  9. Total internal reflection
  10. Blue purple light
Column C

1.

2.

3.

4

5

6

7

8

9

10

Q15. Choose the best choice in the following statements.

(I) Select the correct association :

(a) Oxidation-Loss of an electron (b) Oxidation – gain of an electron (c) Reduction – gain of a neutron (d) Reduction – loss of a neutron

  • Radioactive isotope of Uranium used in Nuclear Bomb is: (a)92 U 235(b)92 U 234

c)92 U 233

d)92 U 238

  • Human population growth is greatest in developing countries because:
  • the birth rate is high in developing countries (b) the death rate is high in developing countries
  • much of the population has already reached the child bearing age
  • most of the world’s population lives in industrialized countries
  • Which woody raw material is used for the manufacture of paper pulp?
  • Cotton (b) Poplar (c) Bagasse (d) Rice straw
  • Rectified spirit contains alcohol about: (a) 80% (b) 95% (c) 70% (d) 85%
  • Which of the following elements is not present abundantly in earth’s crust:
  • Silicon (b) Radium (c) Aluminum (d) Carbon
  • The famous book; Al – Qanoun was written by the Muslim scientist:

(a.) Jabar bin Hayyan (b) Zakariya Al – Razi (c) Abu Ali Sina (d) Abdul Qasim Majreeti

  • Basic metals can be converted into gold by:
  • heating (b) beating (c) artificial nuclear radioactivity(d) chemical reaction
  • A light year is a unit of:
  • time (b) energy (c) length (d) mass
  • One of the main function of the earth’s ozone layer is to:

(a) prevent global warming (b) filter out ultraviolet rays (c) absorb pollution (d) all of the above

FEDERAL PUBLIC SERVICE COMMISSION

COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS IN BPS-17 UNDER THE FEDERAL GOVERNMENT, 2006, EVERY DAY SCIENCE.

GENERAL KNOWLEDGE PAPER-I EVERY DAY SCIENCE

TIME ALLOWED: 100 MINUTES…………….……Maximum Marks: 50

NOTE:

  • Attempt ONLY FIVE questions. All questions carry EQUAL marks.
  • Extra attempt of any question or any part of the attempted question will not be considered.
  • Write short notes on only TWO of the following: (5 each)
  • Magnetic Resonance Imaging
  • Tidal Energy
  • Supersonics
Q.2.  What is Pollen Allergy? What preventive measures are to be taken to avoid it? (4, 6)

Q.3 Name. (1 each)

  1. The alloy consisting of metals copper, zinc and nickel.
  2. The instrument specially designed for recording earthquake waves,
  3. The electrical device which converts sound energy into electrical energy.
  4. The ore of mercury metal.
  5. The device with which variation of blood flow can be heard.
  6. The element, which is abundantly present in the human body.
  7. The scientist who discovered penicillin.
  8. The astronaut who first landed on the surface of the moon.
  9. The desert mammal, which does not drink water.
  10. The mode of heat transfer from the sun to the earth.
Q.4.  Write briefly (not more than four to five sentences) about only FIVE of the following: (2 each)
  • Plaster of Paris
  • Theodolite
  • Bird Flu
  • Gene
  • Thermistor
  • Thermostat
  • Pedometer

  • Which physical quantities are measured by the following units? (1 each)
  • Foot-Pound
  • Torr
  • Slug
  • Guass
  • Acre Foot
  • Becquerel
  • Erg
  • Dyne
  • Gilbert
  • Dioptre
Q.6.  What is the difference between Dam and Barrage? What benefits are obtained by constructing a big dam? (2, 8)
  • Which of the following statements are True and which are False: (1 each)
  1. Pitch of the dog sound is greater than the pitch of the cat sound.
  2. Ultraviolet light is visible but infrared light is not visible.

3) Earthquakes are the lamps illuminating the structure of the earth’s exterior.

  • Electricity does not move through the wire but through a field around the wire.
  • A guava contains more vitamin C than an orange.
  • Sound travels faster in iron than in air.
  • Wheat Bridge is the name of an electrical circuit.
  • Morphine can cause constipation and lowering of blood pressure.
  • A concave lens is used for the correction of the Hyperphobia.
  • The nucleic acids are responsible for proteins synthesis in the human body.
Q.8.  Differentiate between the following pairs: (2 each)
  • Telemeter and Multimeter
  • Perimeter and Altimeter
  • Periscope and Microscope
  • Nucleon and Photon
  • Cusec and Comet
Q.9.  Fill in the blanks: (1 each)
  1. The branch of zoology, which deals with the study of insects is called                      
  2. The disease is caused by the deficiency of Vitamin B1 (Thiamine).
  3. Oil rises in a wick of oil lamp because of a property of matter, called                 
  4. The production of generally identical reproduction is called as                  
  5.                        is the fastest planet of the solar system.
  6. Mercury metal is times heavier than water.
  7. The relative density of milk is measured by an instrument known as                      
  8. The temperature of a human body is measured by an instrument known as                    

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