GENERAL SCIENCE QUESTION AND SOLUTION(QUIZ) – WBCS PRELIMS 2015
In West Bengal Civil Service (WBCS) Preliminary Examination 2015, total 26 questions was asked from General Science.
1. If there were no atmosphere, the earth would have been
[A] Slightly hot
[B] Slightly cold
[C] Very hot
[D] Very cold
Correct Answer
Correct Answer: [C] Very hot
2. The solar cooker works on the same principle as
[A] Bolometer
[B] Pyrometer
[C] Greenhouse
[D] Galvanometer
Correct Answer
Correct Answer: [C] Greenhouse
3. LED stands for
[A] Light emitting device
[B] Light emitting diode
[C] Light encapsulated device
[D] Light emitting dots
Correct Answer
Correct Answer: [B] Light emitting diode
4. Hydraulic press is based on
[A] Archimedes’ law
[B] Pascal’s law
[C] Reynold’s law
[D] Bernouli law
Correct Answer
Correct Answer: [B] Pascal’s law
5. At what temperature, Celsius and Fahrenheit readings will be same?
[A] + 40°
[B] + 20°
[C] – 20°
[D] – 40°
Correct Answer
Correct Answer: [D] – 40°
6. Mg2+ is isoelectronic with
[A] Ca2+
[B] Na+
[C] Zn2+
[D] Cu+
Correct Answer
Correct Answer: [B] Na+
7. Hybridization of C2 and C3 of
1 2 3 4 5
CH3−CH−C−CH−CH3 are
[A] sp sp3
[B] sp2 sp
[C] sp2 sp2
[D] sp sp
Correct Answer
Correct Answer: [C] sp2 sp2
8. When a ball is taken from the equator to the pole of the earth
[A] Its mass increases
[B] Both its mass and weight change
[C] Its weight increases
[D] Its weight decreases
Correct Answer
Correct Answer: [C] Its weight increases
9. The compound that cannot be kept is glass vessel because it reacts with glass is
[A] HNO3
[B] HCl
[C] HF
[D] HBr
Correct Answer
Correct Answer: [C] HF
10. How many grams of NaOH are needed to make 100ml. of a 0.5 M solution of NaOH ? (Atomic weight : Na = 23, 0 = 16, H = l)
[A] 2
[B] 20
[C] 4
[D] 1
Correct Answer
Correct Answer: [A] 2
11. Chemically Aspirin is:
[A] Acetyl salicylic acid
[B] Sodium salicylate
[C] Methyl salicylate
[D] Ethyl salicylate
Correct Answer
Correct Answer: [A] Acetyl salicylic acid
12. In which layer of the atmosphere does ozone act as a UV radiation shield ?
[A] Troposphere
[B] Thermosphere
[C] Stratosphere
[D] Mesosphere
Correct Answer
Correct Answer: [C] Stratosphere
13. Transfer of pollen from another to the stigma of the same flower is referred to as:
[A] Allogamy
[B] Geitenogamy
[B] Xenogamy
[D] Autogamy
Correct Answer
Correct Answer: [D] Autogamy
14. The Pyrimidine bases in a DNA are:
[A] Adenine and Guanine
[B] Thymine and Adenine
[C] Cytosine and Guanine
[D] Thymine and Sytosine
Correct Answer
Correct Answer: [D] Thymine and Sytosine
15. Which one of the following is the natural auxin?
[A] NAA
[B] IAA
[C] 2, 4-D
[D] IBA
Correct Answer
Correct Answer: [B] IAA
16. Which is the following gets its name from a river in the Democratic Republic of Congo?
[A] Chikungunia virus
[B] Lassa fever
[C] Salmonella bacteria
[D] Ebola virus
Correct Answer
Correct Answer: [D] Ebola virus
17. During cell division, DNA synthesis takes place in
[A] Interphase
[B] Anaphase
[C] Prophase
[D] Telophase
Correct Answer
Correct Answer: [A] Interphase
18. In monohybrid cross of Mendel, when a pure tall plant was crossed with a dwarf plant, all the F1 progeny were tall, because of:
[A] Co-dominance
[B] Dominance
[C] Incomplete dominance
[D] Epistasis
Correct Answer
Correct Answer: [B] Dominance
19. One of the characteristics of the atmosphere of pre-biotic primitive earth was :
[A] Absence of hydrogen
[B] Absence of water vapour
[C] Absence of nitrogen
[D] Absence of oxygen
Correct Answer
Correct Answer: [D] Absence of oxygen
20. Cerebral Malaria is caused by
[A] Plasmodium vivax
[B] Plasmodium malariae
[C] Plasmodium falciparum
[D] None of the above
Correct Answer
Correct Answer: [C] Plasmodium falciparum
21. “Natural Selection” is the theory from
[A] G. J. Mendel
[B] Charles Darwin
[C] T. H. Morgan
[D] None of the above
Correct Answer
Correct Answer: [B] Charles Darwin
22. Satellites provide information about
[A] Forest and vegetative cover
[B] Rivers and their courses
[C] Advancing storms and cyclones
[D] All of the above
Correct Answer
Correct Answer: [D] All of the above
23. Coal, Petroleum and Natural Gas are examples of
[A] Fossil Fuels
[B] Cryogenic Fuels
[C] Indigenous Fuels
[D] Radioactive Fuels
Correct Answer
Correct Answer: [A] Fossil Fuels
24. One turn of DNA helix measures
[A] 34A°
[B] 3.4A°
[C] 24A°
[D] 44A°
Correct Answer
Correct Answer: [A] 34A°
25. Phenotypic ratio of Mendelian Dihybrid cross is
[A] 9 : 3 : 3 : 1
[B] 1 : 1 : 1 : 1
[C] 3 : 4 : 3 : 1
[D] 1 : 2 : 1 : 1
Correct Answer
Correct Answer: [A] 9 : 3 : 3 : 1
26. Cranial nerve in mammals are
[A] 10 pairs
[B] 10
[C] 12 pairs
[D] 12
Correct Answer
Correct Answer: [C] 12 pairs