SCIENCE OBJECTIVE QUESTIONS FOR SSC SET 29

Here is the set on SCIENCE OBJECTIVE QUESTIONS FOR SSC, UPSC and other competitive exam.

SCIENCE OBJECTIVE QUESTIONS FOR SSC

1. Allantois of Embryo helps in –
A)Respiration
B)Excretion
C)Protection
D)Digestion

2. Which one of the following animals belongs to Mollusca?
A)Hare
B)Hydra
C)Hyla
D)Haliotis

3. Outside the nucleus DNA is found in –
A)Mitochondria
B)Ribosome
C)Endoplasmic reticulum
D)Golgi bodies

4. Animal protein is called first class protein because it is—
A)Delicious in taste
B)Cheaper in the market
C)Rich in essential amino acids
D)Easily digestible

5. It is easy to burst a gas-filled balloon with a needle than with a nail. It is because-
A)Nail exerts more pressure than needle on the balloon
B)Needle exerts more pressure than nail on the balloon
C)Gas is reactive with the needle
D)Nail is more longer than needle

6. The velocity of sound in moist air is more than in dry air because the moist air has-
A)Less pressure than dry air
B)More pressure than dry air
C)More density than dry air
D)Less density than dry air

7. X-rays can be used –
A)To detect heart diseases
B)To detect defects in precious stones and diamonds
C)To detect gold under the earth
D)For cutting and welding of metals

8. Ice is packed in saw dust because-
A)Saw dust is poor conductor of heat
B)Saw dust is a good conductor of heat
C)Saw dust does not stick to the ice
D)Saw dust will not get melted easily

9. What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper?
A)There is a violent explosion
B)There is no reaction
C)The paper ignites
D)There is a crackling sound

10. Most commonly used bleaching agent is—
A)Alcohol
B)Carbon dioxide
C)Chlorine
D)Sodium chloride

11. The least penetrating power ray is –
A) α-Ray
B) β-Ray
C) γ-Ray
D)X-Ray

12. Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen?
A)Water
B)Hydrogen
C)Ozone
D)Nasant Hydrogen

13. The maximum fixation of solar energy is done by—
A)Bacteria
B)Fungi
C)Green plants
D)Protozoa

14. The term ‘brown air’ is used for-
A)Photochemical smog
B)Sulfurous smog
C)Industrial smog
D)Acid fumes

15. Which of the following is FALSE with respect to rain water harvesting?
A)It helps raising water table
B)It helps meet rising water demand
C)It increases run-off losses
D)It is a device of water conservation

16. Proxy acetyl nitrate is a –
A)Plant hormone
B)Vitamin
C)Secondary pollutant
D)Acidic dye

17. Electric current is measured using which of the following instrument?
A)Voltmeter
B)Anemometer
C)Wattmeter
D)Ammeter

18. Photoperiodism affects-
A)Flowering
B)Vegetative growth
C)Fruiting
D)All of these

19. Match the following –

          List –I                List – II
A)Ascorbic acid                       1.Photosynthetic pigment
B)Chlorophyll                            2. Quencher
C)Carotenoid                           3. Enzyme
D)Superoxide dismutase          4. Vitamin – C

         a       b       c       d
A)       4       2       1       3
B)       2       4       1       3
C)       4       1       3       2
D)       4       1       2       3

20. Hemophilia is–
A)caused by bacteria
b)caused by virus
c) caused by pollutants
d)a hereditary defect