General Science School Exam Questions

General Science School Exam Questions
School Exam Practice General Science Questions
What do the following abbreviations stand for?

1. B. C. G......
Answer. Bacillus Calmetee Guerin (Anti-Tuberculosis Vaccine)

2.. D. D. T......
Answer. Dichloro-Diphenyl Trichloro ethane (Disinfectant)

3. E. R. D. A ......
Answer. Energy Research & Development Administration

4. B. A. R. C _.....
Answer. Bhabha Atomic Research Centre

5. I. R. B M......
Answer. Intermediate Range Ballistic Missile




6. A disease caused by entamoeba.
Answer. Dysentery

7. A science related with the improvement of
human race.

Answer. Eugenics

8. Poisonous substances which are produced
By pathogens in the host.
Answer. Toxins

9. A disaccharides present in the milk;
Answer. Lactose

10. Name two common communicable diseases.
Answer. Small Pox & Tuberculosis

Write Yes or No as answer

11. Charles Darwin propounded cell theory.
Answer. No

12. Deciduous trees are the trees which shed
their leaves in a certain season.
Answer. Yes

13. Soil-erosion cannot be controlled by cons-
Ervation techniques.

Answer. No

14. Dwarf Mexican varieties of wheat are low
yielding once.
Answer. No


15. Horticulture deals with garden crops

Answer. Yes

Objective Test GK General Science For Exams

Objective Test GK General Science For Exams
General Science Quiz - Multiple Choice Questions with Answers
1. Ethylene oxide on hydrolysis yield-

(a) Ethyl alcohol
(b) Ethylene glycol
(c) Ethanol
(d) Acetone
(e) None of these
Answer. (c)

2. Wood spirit is-
(a) Methyl alcohol
(b) Ethyl alcohol
(c) Butyl alcohol
(d) Propyl alcohol
(e) Isopropyl alcohol
Answer. (a)

3. D N A consists of units called-
(a) Glucosides
(b) Deoxyribose
(c) Nucleotides
(d) Peptides
(e) None of these
Answer. (c)

4. Thrombosis is a disease of the-
(a) Thyroid gland
(b) Lungs
(c) Nurve bursting
(d) Brain
(e) Blood
Answer. (e)

5. Stomata are bound by a pair of guard cells.
Stomata close when guard cells become-
(a)Turgid
(b) Flacid
(c) Half turgid
(d) Half Flacid
(e) Small
Answer. (b)

6. Which is collip’s hormone?
(a) Thyroxine
(b) Parathormone
(c) Insulin
(d) Esterogen
(e) Glucagon V
Answer. (b)

7. An antiviral protein which might help in
Curing viral diseases in future is-
(a) Antibody
(b) Histone
(c) Nucleoprotein
(d) Interferon
(e) Antigen
Answer. (d)

8. Which of the following phenomena normally
Leads to coronary heart disease-
(a) Blood pressure
(b) Anemia
(c) Arteriosclerosis
(d) Indigestion
(e) Worry
Answer. (c)

9. Red-green colour blindness in man is
Known as-
(a) Protanopia
(b) Deuteranopia
(c) Both a & b
(d) Marfan’s syndrome
(e) None of these
Answer. (c)

10 Genetics is the study of the-
(a) Mutations
(b) Cell division
(c) Reproduction
(d) Mechanism of inheritance
(e) Growth and differentiation in living organism
Answer. (d)

11 ‘World Environment Day’ is celebrated every year on-
(a) 15 January
(b) 26 August
(c) 5 June
(d) 10 July
(e) 20 July
Answer. (c)

12Which of the following disease is not
Water borne disease?
(a) Cholera
(b) Typhoid
(c) Asthama
(d) Amoebic dysentery
(e) Tularemia
Answer. (c)

13 The viruses’ lack-
(a) Proteins
(b) Enzymes
(c) Nucleic acids
(d) Tentacles
(e) All of these
Answer. (b)

14. Commercial source of streptomycin is-
(a) Streptomyces venezuellae
(b) Streptomyces griseus
(c) Streptomyces scoleus
(d) Streptomyces aureus
(e) All of these
Answer. (b)

15. Centripetal xylem is the characteristic of-
(a) Roots
(b) Stems
(c) Leaves
(d) Petioles
(e) inflorescence
Answer. (a)

16. The human blood has a specific gravity of-
(a) 1.055
(b) 1.235
(c) 2.o15
(d) 2.00
(e) 2.45
Answer. (a)

17. The name of the disease called Lock-jaw is-
(a) Hypetropia
(b) Epilepsy
(c) Apoplexy
(d) Tetanus
(e) Arthritis
Answer. (d)

18. It is not advisable to sleep under a tree at
Night because-
(a) It is cold over there
(b) The leaves produce a sticky substance
(c) The tree gives out CO2 at night
(d) Oxygen is produced by the air
(e) Supernatural beings inhabit the trees at
Night
Answer. (c)

19. Ionizing radiations are used in-
(a) Sterilization
(b)Preservation of food stuffs
(c) Inducing artificially mutation
(d) All the above
(e) None of the above
Answer. (d)

20. Mention the science dealing with fossil
Plants-
(a) Palaeobotany
(b) Geology
(c) Epistemology
(d) Entomology
(e) Histology
Answer. (a)


21. Which one of the following is an indicator of
Air pollution?
(a) Lichens
(b) Cycas
(c) Algae
(d) Bryophytes
(e) Pteridophytes
Answer. (a)


22. The organism that lives at the cost of
Another living organism is called-
(a) Aphrodite
(b) Saprophyte
(c) Graminivor
(d) Parasite
(e) Epiphyte
Answer. (d)

23= The poisonous substance produced by
Bacteria is known as-
(a) Toxin
(b) Caffein
(c) Antibodies
(d) Auxin
(e) Antitoxin



Answer : (a)

24. Plants can be made disease resistant by-
(a) Treating with colchicine
(b) Inducing mutations
(c) Breading with their wild relatives
(d) Treating with fungicides
(e) Treating with 2-4D
Answer. (c)


25. One of the following is the rich source of
Natural litmus-
(a) Red algae
(b) Lichens
(c) Rocella
(d) Agaricus
(e) Sargassum
Answer. (c)

General Science Objective MCQ Practice test For Exams

General Science Objective MCQ Practice test For Exams
GENERAL SCIENCE 25 MCQs For Exams like KVS UPSC NDA RRB and PSC
1. The substance which has recently received
Greater attention in investigations concerning
Diseases of the heart and blood vessels
Is-
(a) Protein
(b) Fats
(c) Glycerol
(d) Cholesterol
(e) Amino acids
Answer. (d)

2. Pneumonia is caused by-
(a) Virus
(b) Fungi
(c) Bacteria
(d) Algae
(e) None of these
Answer. (c)

3. The red colour of red sea is because of-
(a) Red algae
(b) Cephaleuros
(c) Brown algae
(d) Trichodesmium erythrium
(e) None of the above
Answer. (d)

4. Which one of the following is commonly
called ‘Edible sponge mushroom’?
(a) Sargassum
(b) Morchella
(c) Agaricus
(d) Polyporus
(e) None of these
Answer. (b)

5. The most important part of a green plant is-
(a) Stalk
(b) Leaf
(c) Root
(d) Flower
(e) None of these
Answer. (b)

6- The movement of water molecular from
One cell to another depends on-
(a) Osmotic concentration
(b) Turgor pressure
(c) Wall pressure
(d) Plasma pressure
(e) Diffusion pressure deficit
Answer. (a)

7. Which one of the following gases is
Considered as atmospheric pollutant?
(a) Oxygen
(b) Ozone
(c) S02
(d) Nitrogen
(e) Argon
Answer. (c)

8. Gaseous exchange between old corky
Stem and internal, tissue takes place
Through-
(a) Xylem
(b) Phloem
(c) Lenticels
(d) Stomata
(e) Leaves
Answer. (c)

9. The branch of the science dealing with the
Study of human skin is called-
(a) Physiology
(b) Pathology
(c) Anatomy
(d) Biochemistry
(e) Dermatology
Answer. (e)

10. Teratology is the branch of biology which
Deals with the study of-
(a) Extra-embryonic membrane
(b) Post-embryonic development
(c) Abnormal development after birth or Hatching
(d) Haemopoisis
(e) Abnormal development during embryo Genesis
Answer. (e)

11. Which of the following can be used for Biological control of mosquitoes?
(a) Oil
(b) Ointments
(c) D. D. T.
(d) Gambusia
(e) Gamaxene
Answer. (d)

12. The total number of muscles in the human
Body is-
(a) 525
(b) 639
(c) 373
(d) 457
(e) 734
Answer. (b)

13 The function of the tapetum in the anther Is-
(a) Protective
(b) Productive
(c) Nutritive
(d) Decorative
(e) Conduction
Answer. (c)

14 The language of Honey-bees was decoded By-
(a) Carolus Linnaeus
(b) William Harvey
(C) Karl von Frisch
(d) Charles Darwin
(e) Mendel
Answer. (c)

15 What is the name of the longest bone of Thigh?
(a) Vistula
(b) Femur
(c) Fibula
(d) Humerus
(e) Tibia
Answer. (b)

16. Deficiency of Vitamin ‘C’ causes-
(a) Rheumatism a
(b) Kidney malfunction
(c) Scurvy
(d) Respiratory disease
(e) Night blindness
Answer. (c)
219. Diseases transmitted by the head louse is-
(a) Plague
(b) Rabies
(c) Scurvy
(d) Typhoid
(e) Cholera
Answer. (d)

17. The main function of white blood corpuscles
In the body is-
(a) To carry food
(b) To help in the formation of clot
(c) To carry oxygen
(d) To protect the body against diseases
(e) To help extricate waste products
Answer. (d)

18. Blood Plasma is composed chiefly of-
(a) Water
(b) The hormone component
(c) The antibody component
(d) Haemoglobin
(e) Lymph
Answer. (a)

19. Haemoglobin is a pigment present in-
(a) The plasma
(b) Red blood cells
(c) White blood cells
(d) Spleen
(e) Hepatic cells
Answer. (b)


20. Which of the following processes liberates
Energy?
(a) Osmosis
(b) Symbiosis
(c) Photosynthesis
(d) Respiration
(e) Digestion
Answer. (d)

21. Diabetes can be controlled by the injection
Of-
(a) Penicillin
(b) Thyrosin
(c) Terramycin
(d) Auromycin
(e) Insulin
Answer. (e)

22. Which one of the following cartilage helps in
the easy birth of young ones without damage
To pelvic girdle?
(a) Fibrous Cartilage
(b) Hyaline Cartilage
(c) Elastic Cartilage
(d) Non-elastic Cartilage
(e) None of the above
Answer. (a)

23. The ‘Universal Recipient’ Belongs to blood
Group-
(a) O
(b) A
(C) B
(d) AB
(e) None of these
Answer. (d)

24. Antibiotics are-
(a) Anaesthetic substances
(b) Sleeping pills
(c) Special medicines used during surgical
Operations
(d) Drugs prepared from moulds and mould
Like organisms
(e) Medicines against contamination of
Wounds
Answer. (d)

25. Xerophytes are-
(a) Plant tissues which carry out transportation
Of water minerals and food from one part to
Another
(b) The plants adapted to grow in dry habitats
(c) The male reproductive parts of the flower
(d) Organisms living on dead organic matter
(e) None of these
Answer. (b)

general science trivia questions

general science trivia questions for School College Quiz and many Exams Like UPSc NDA Teachers PSC RRB .
Free Online Quiz Containing 20 Test Questions

1. The dimensions of Planck’s constant are the
same as the dimensions of-
(a) Energy
(b) Frequency
(c) Linear Momentum
(d) Angular Momentum
(e) None of the above
Answer. (d)

2. Sometimes the tubes in the well-inflated tyres of a cycle left in the sun burst open-
(a) Because the pressure of air inside the Tube increase
(b) Because the volume of air inside the tube increases due to rise in its temperature
(c) Because the tube containing air melts
(d) Because the volume and the pressure
both increase
(e) Nothing of the above
Answer. (b)

3. Galvanized iron is coated with a thin coating of-
(a) Copper
(b) Tin
( c ) Zinc
(d) Aluminum
(e) White lead
Answer. (c)

4. In the visible spectrum the colour having the
shortest wavelength is-
(a) Violet
(b) Blue
(c) Red
(d) Yellow
(e) Green
Answer. (a)

5. The heater element in an electric iron is
made of-
(a) Copper
(b) Tungsten
(C) Nichrome
(d) Iron
(e) Platinum
Answer. (c)

6. At sun rise or at sun set, the sun appears to
be reddish while at midday it looks white. This is because-
(a) The sun is colder at sunrise or at sunset
(b) Diffraction sends red rays to the earth at
these time
(c ) Refraction causes this phenomenon
(d) Scattering due to dust particles and air molecules causes this phenomenon
(e) None of these
Answer. (d)

7. The radiant energy of the sun results from-
(a) Nuclear fusion
(b) Nuclear fission
(c) Cosmic radiation
(d) Combustion
(e) Explosion
Answer. (a)


8. The image formed on the retina of the eye is-
(a) Upright and real
(b) Virtual and upright
(c) Real and inverted
(d) Enlarged and real
(e) Larger than the object
Answer. (c)


9. The surface water in a lake is just going to
Freeze. What is the temperature of water at
The bottom?
(a) 0°c
(b) More than 4°C
(c) 4°C
(d) Less than 4°C
(e) -2°C
Answer. (c)


10. Which of the following is the most viscous Medium ?
(a) Coal tar
(b) Water
(c) Glycerin
(d) Alcohol
(e) Air
Answer. (a)



11. Railway tracks are banked on curves so
That-
(a) No frictional force may be produced
between the track and the wheel
(b) The train may not fall down inwards
(c) The weight of the train may be reduced
(d) Necessary centripetal force may be
Obtained from the horizontal component
Of the weight of the train
(e) Necessary centrifugal force may be
Obtained from the horizontal component
Of the weight of the train

Answer. (d)

12. Oil rises up the wick in a lamp because-
(a) Oil is volatile
(b) Oil is very light
(c) Of the surface tension phenomenon
(d) Of the diffusion of oil through the wick
(e) Of the capillary action phenomenon
Answer. (c)


13. Which of the following utilizes Newton’s?
Third law of motion?
(a) Archery
(b) Space-rocket
(c) Venturimeter
(d) Internal combustion engine
(e) Kite flying
Answer. (b)


14. The main source of heat is-
(a) The sun
(b) The stars (excluding the sun)
(c) The interior of the earth
(d) Chemical reactions
(e) Electricity
Answer. (a)



15. The air becomes heated by-
(a) Conduction
(b) Convection
(c) Radiation
(d) Expansio
(e) Diffusion
Answer. (b)


16. To a space traveller on the moon during day
Time the lunar sky appears-
(a) Blue
(b) Black
(c) White
(d) Red
(e) Yellow
Answer. (b)


17. Sound is a form of-
(a) Energy
(b) Matter
(c) Radiation
(d) Electromagnetic energy
(e) None of these
Answer. (a)


18. Which of the following statements is true?
(a) Sound waves, not light waves, bend
around obstacles
(b) Light waves, not sound waves, bend
around obstacles
(c) Both light and sound waves bend around
obstacles
(d) Neither sound waves nor light waves
Bend around obstacles
(e) None of these
Answer. (e)


19. A mirage is the result of-
(a) The reflection of light from hot sand
(b) Fluctuation in the refractive index of the
Atmosphere with height
(c) Increase in the refractive index of the
Atmosphere with height
(d) Decrease in the refractive index of the
Atmosphere with height
(e) None of these
Answer. (c)


20. A person cannot see objects clearly which
are nearer than 75 cms. From his eyes. What
Disease is he suffering from?
(a) Astigmatism
(b) Colour blindness
(C) Myopia
(d) Hypermetropia
(e) Hydrophobia
Answer. (d)

science objective type questions and answers

science objective type questions and answers
General Science Quiz - Multiple Choice Questions with Answers
General Science - General Knowledge Questions and Answers
1. If 10 g of ice at 0°C mixes with l0 g of water at 10°C, then the final temperature
t is given by
(a) (10 x 80) + 10(t-0) = 10(10-t)
(b) 10 x 80 = 10(10-t) + 10(t-0)
(c) t = 5°C
(d) t = 0°C
Ans. (d)

2. The amount of heat required for the above operation is
(a) 380 cal
(b) 500 cal
(c) 4.2 cal
(d) none of these
Ans. (d)

3. One joule is approximately equal to
(a) 0.28 cal
(b) 0.32 cal
(c) 0.24 cal
(d) 4.2 cal
Ans. (c)

4. M g of ice at 0°C is to be converted to water at 0°C. If L is the latent heat of
fusion of ice, the quantity of heat required for the above operation would be
(a) MLca1
(b) M/ L
(c) L/ M
(d) none of these
Ans. (a)

5. Two bodies A and B are said to be in thermal equilibrium with each other, if
(a) heat flows from A to B
(b) heat flows from B to A
(c) both the bodies lose equal amounts of heat to the atmosphere
(d) heat does not flow from either A or B
Ans. (d)

6. If a substance contracts on heating, its coefficient of linear expansion is
(a) +ve
(b) -ve
(c) zero
(d) infinity
Ans. (b)


7. The units of RH are
(a) kg-m-3
(b) kg
(c) kg-m2
(d) none of these
Ans. (d)

8. If RH is high
(a) we feel sultry
(b) we perspire less
(c) clothes do not dry easily
(d) all the above are correct
Ans. (d)

9. When it is raining, the dew point is
(a) 0°C
(b) 100°C
(c) 50°C
(d) room temperature
Ans. (d)


10. The most comfortable value for RH is
(a) 10%
(b) 20%
(c) 30%
(d) 90%
Ans. (c)

11. When the temperature of water rises, the rate of evaporation
(a) increases
(b) decreases
(c) remains the same
(d) first decrease then increases
Ans. (a)

12. The first thermometer was developed by
(a) Joule
(b) Fahrenheit
(c) Galileo
(d) Watt
Ans. (c)



13. The relative humidity is 50%, if air contains about
(a) 2.55 g of water Vapour at 40°C
(b) 25.5 g of water Vapour at 40°C
(c) 2.55 kg of water Vapour at 40°C
(d) 25.5 kg of water Vapour at 40°C
Ans. (b)

14. Relative humidity is the percentage of the
(a) absolute humidity value to the amount of humidity actually present
(b) increase of humidity/absolute humidity
(c) amount of humidity actually present to the
(d) none of these
Ans. (c)

15. Evaporation is the process of changing liquid into vapour
(a) at any temperature
(b) above, its boiling point
(c) at its boiling point
(d) below its boiling point
Ans. (d)

16. When we cool a gas below its point, the KE of its molecules
(a) increases
(b) decreases
(c) remains the same
(d) first increases then decreases
Ans. (b)

17. A piece of ice at 0°C is added to a vessel containing water at 0°C, then
(a) all of the ice will melt
(b) some ice will melt
(c) no ice will melt
(d) the temperature will decrease further
Ans. (c)

18. At high temperature, the molecules of a substance
(a) move more vigorously
(b) move less vigorously
(c) become stationary
(d) are attracted strongly
Ans. (a)

19. Fahrenheit scale divides two fixed points into
(a) l80 parts
(b) 2l2 parts
(c) 100 parts
(d) 32 parts
Ans. (a)

20. Celsius scale divides two fixed points into
(a) 180 parts
(b) 212 parts
(c) 100 parts
(d) 32 parts
Ans. (c)


21. Two rods, one of iron and the other of aluminum, are heated to the same
temperature. Then,
(a) the iron rod will expand less
(b) the iron rod will expand more
(c) both rods will expand equally
(d) the iron rod will not expand at all
Ans. (a)

22. When steam condenses into water its
(a) temperature remains the same
(b) heat dissipates
(c) temperature increases
(d) temperature decreases
Ans. (b)

23. Two blocks of steel A and B, A being two times heavier than B, are at 40°C.
The ratio of heat content of A to B is
(a) 1
(b) 4
(c) 2
(d) 1/ 2
Ans. (c)

24. When 60 calories of heat are supplied to 15 g of water, the rise in temperature is
(a) 75°C
(b) 900°C
(c) 4°C
(d) 0.25°C
Ans. (c)

25. A 10kg storage battery has an average specific heat of 0.2 kcal/kg°C. When fully
charged, the energy content of the battery is 1 kcal. If the entire energy were used
to raise the temperature, then the temperature would increase by
(a) 0.2°C
(b) 0.5°C
(c) 200°C
(d) 20°C
Ans. (b)

Free Online Science GK

Free Online Science GK
Free Online General Knowledge Preparation Test Science
Free Online Science Gk Practice and Preparation Test

1. The density of ice is x g cm -3 and that of water is y g cm-3. When m gram of ice melts, then change in volume is—
(A) m (y—x)
(B) y—x/m
(C) my (x-.y)
(D) (m/x –m/y)
Ans. (D)

2. The work function of a metallic surface is 5.01 eV. The photoelectrons are emitted when light of wavelength 2000 A falls on it. The stopping potential is—
(A) 2.24V
(B) 1.2V
(C) 2.4 V
(D) 4.8 V
Ans. (B)

3. Chemical behaviour of an element is related to-
(A) Atomic number
(B) Atomic size
(C) Atomic volume
(D) Atomic structure
Ans. (D)

4…………. waves can not be transmitted through vacuum.
(A) Light
(B) Heat
(C) Sound
(D) Electromagnetism
Ans. (C)

5. The geometry of NaCl is—
(A) Triangular
(B) Tetrahedral
(C) Octahedral
(D) Diagonal
Ans. (C)

6. The bond angle in the molecules H2O, NH3, CH4, CO2 are in order—
(A) H2O>NH3>CH4>CO2
(B) H2O (C) H2O < NH3 (D) CH4 Ans. (A)

7. Borax has the formula—
(A) Na2B4O7
(B) Na2B4O75H2O
(C) Na2B4O77H2O
(D) Na2B4O710H2O
Ans. (D)

8. Brass contains—
(A) Cu + Sn
(B) Cu + Ni
(C) Cu + Zn
(D) Mg + Al
Ans. (C)

9. The best technique employed for concentration and purification of a compound is—
(A) Sublimation
(B) Chromatography
(C) Steam Distillation
(D) Fractional Distillation
Ans. (B)

10. Which of the following compounds would undergo cannizaro’s reaction?
(A) Propionaldehyde
(B) Benzaldehyde
(C) Bromobenzene
(D) Acetaldehyde
Ans. (B)

11. Which does not show resonance?
(A) Benzene
(B) Aniline
(C) Ethylamine
(D) Toluene
Ans. (C)

12. The edible part of cauliflower is—
(A) Bud
(B) Flower
(C) Inflorescence
(D) Fruit
Ans. (B)

13. Most of cereals belong to—
(A) Malvacea
(B) Solanacea
(C) Graminea
(D) Leguminosae
Ans. (C)

14. Death of stem and root tips occurs due to the deficiency of—
(A) Phosphorous
(B) Nitrogen
(C) Calcium
(D) Carbon
Ans. (C)

15. Sporophyte of fern produces—
(A) Seeds
(B) Pollen
(C) Spores
(D) None of these
Ans. (C)

16. Duramen or heart wood is—
(A) Outer region of the secondary wood
(B) Inner region of the secondary wood
(C) Region of pericycle
(D) Another name of cambium
Ans. (B)

17. Lichens are the best indicator of—
(A) Air pollution in cities
(B) Water pollution in the hills
(C) Water pollution in the rivers
(D) Soil pollution in the deserts
Ans. (A)

18. Insulin crystals are found in—
(A) Wheat root
(B) Mango root
(C) Dahlia root
(D) Sugarcane root
Ans. (C)

19. The best example of poly-embryony is—
(A) Cocas
(B) Citrus
(C) Capsicum
(D) Cycas
Ans. (D)

20. Which one of the following is an insectivorous plant?
(A) Castor
(B) Hydrilla
(C) Ranunculus
(D) Drosera
Ans. (D)

21. Genetic recombination occurs through—
(A) Mitosis and-fertilization
(B) Mitosis and meiosis
(C) Meiosis division
(D) None of these
Ans. (C)

22. What is an Rh-factor?
(A) A type of sugar
(B) ADNA
(C) An enzyme related
(D) Blood group
Ans. (D)

23. Virus are—
(A) Accellular
(B) Poly-cellular
(C) Mono-cellular
(D) Bi-cellular
Ans. (A)

24. Blood is made of—
(A) Plasma
(B) Lymphocytes
(C) Hemoglobin
(D) None of these
Ans. (A)


25. Ascaris normally inhabits the lumen of—
(A) Stomach
(B) Small intestine
(C) Large intestine
(D) Appendix
Ans. (B)

General Science Gk MCQ test

General Science Gk MCQ test
General Science Quiz - GK Multiple Choice Questions with Answers
Basic General Knowledge Quiz - GK Multiple Choice

1. Kilowatt hour (kWh) represents the unit of
(a) power
(b) impulse
(c) momentum
(d) none of these
Ans. (d)

2. A body moves through a distance of 3 m in the following different ways.
In which case is the maximum work done?
(a) When pushed over an inclined plane.
(b) When lifted vertically upward.
(c) When pushed over smooth rollers.
(d) When pushed on a plane horizontal surface.
Ans. (b)

3. A wound watch spring has _____ energy.
(a) mechanical
(b) kinetic
(c) potential
(d) kinetic and potential
Ans. (c)

4. When the time taken to complete a given amount of work increases, then,
(a) power increases
(b) power decreases
(c) energy increases
(d) energy decreases
Ans. (b)

5. The moon revolves around the earth because the earth exerts a radial force
on the moon. Does this perform work on the moon?
(a) No
(b) Yes, sometimes
(c) Yes, always
(d) Cannot be decided
Ans. (a)

6. The K.E. of a body is increased most by doubling its
(a) mass
(b) weight
(b) speed
(d) density
Ans. (c)

7. A lifts a doll from the floor and places it on a table. If the weight of the
doll is known, what else does one need to know in order to calculate the
work A has done on the doll?
(a) The time required
(b) Height of the table
(c) Mass of the ball
(d) Cost of the doll or the table
Ans. (b)

8. The unit of power is
(a) watt per second
(b) jou1e
(c) kilo joule
(d) watt
Ans. (d)

9. A raised hammer posses
(a) K.E. only
(b) gravitational P.E.
(c) electrical energy
(d) sound energy
Ans. (b)

10. With the increase in temperature, the density of a substance, in general,
(a) increases
(b) decreases
(c) first increase then decreases
(d) first decrease then increases
Ans. (b)

11. The normal temperature of the human body is
(a) 37°C
(b) 98°C
(c) 368K
(d) none of these
Ans. (a)

12. A circular disc of copper has a symmetrical hole at its centre. The disc is
uniformly heated. The diameter of the hole will
(a) increase
(b) decrease
(c) remain the same
(d) become indeterminate
Ans. (a)

13. When water is heated from 0°C, its volume
(a) increases
(b) decreases till 4°C
(c) remains the same
(d) first increases then decreases
Ans. (b)

14. The most commonly used thermometric substance is
(a) water
(b) alcohol
(c) mercury
(d) none of these
Ans. (c)

15. In summer, the clocks
(a) become slow
(b) become fast
(c) gives correct time
(d) lose time
Ans. (a)

16. Glaciers always melt at the __________ first.
(a) top surface
(b) sides
(c) bottom
(d) middle surface
Ans. (c)

17. When air is saturated, it cannot hold
(a) more water Vapour
(b) more air
(c) more carbon dioxide
(d) more oxygen
Ans. (a)

18. At dew point. RH is
(a) 10%
(b) 20%
(c) 50%
(d) 100%
Ans. (d)

19. Burning of a meteorite in the earth’s atmosphere is an example of change of
(a) heat energy into kinetic energy
(b) kinetic energy into heat energy
(c) kinetic energy into potential energy
(d) potential energy into heat energy
Ans. (b)


20. Soda bottles are made of thick glass so that they can withstand the
(a) pressure in summer
(b) temperature in summer
(c) decrease in viscosity
(d) increase in potential energy
Ans. (a)