General Studies

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General Studies : General Science

1-The mid air swing of a spinning football can be explained on the basis of Bernoulli’s principles.

2-Light travels faster in air than in water.

3-Cobalt 60 is generally used in radiation theory because it emits gamma rays.

4- Chloroxylenol antiseptic compound is present in Dettol.

5- Calcium chloride is a compound that is a white solid which absorbs water vapour from the air.

6-Mercury metals forms an amalgum with other metals.

7- Mortar is a tick paste of cement, sand and water .

8- Silicon element forms the highest number of compounds in the periodic table

9-Stainless steel is an alloy of Iron, Chromium and Nickel.

10-  How does addition of ethylene dibromide help to petrol? – Elimination of lead oxide.

11-Red Phosphorus is used in safety metals.

12-  What do we call the process of separation of pure water from impurities? – Distillation.

13-Nitrous oxide is laughing gas.

14-From Pitchblende mineral is radium obtained.

15-Tetraethyl lead is used as Petrol additive.

16-The element common to all acids is Hydrogen.

17-Silicon Carbide is used for cutting very hard substances.

18-  What is the name of gas which is present in both the natural gas and the biogas? – Methane.

19- With which liqued is anomalous expansion associated? – Water

20- What is alcohol obtairied in the saponification process? – Glycerol.

21-Which is used to dilute oxygen in the gas cylinders used by divers? – Helium.

22-Which is the nuclear particle having no mass and no charge, but only spin? – Neutrino.

23-Of which alloy the commonly used safety fuse-wire is made? – Alloy of Tin and Lead

24- Of which Container radioactive materials should be kept? – Pb

25- Ethanol containing 5% water By which name is it known? – Rectified spirit

26-Which is not an anaesthetic agent in surgical operations? – Acetone

27- What is the percentage of Nitrogen, present in ammonium sulphate? – 21%

28- Which metal can deposit copper from copper sulphate solution? – Iron

29- Sodium stearate is a salt and how is it used? – To make soap

30-  Which are the two main constituents of granite? – Iron and silica

31- Which method of water purification does not kill microorganism? – Filtration

32- On heating, Gypsum loses certain percentage of its water content and what does it become? – Plaster of Paris

33- By which was the presence of Cobalt. in Vitamin B-12 established for the first time? – Borax-Bead test

34-  The pH of fresh milk is 6. When it turns sour, what will be the pH? – Less than 6

35- Which group of gases contribute to the “Green House effect”? – Carbon dioxide and Methane

36-  Which gase is supporter of combustion? – Oxygen.

37-The most abundant metal in the earth’s crust is Aluminium.

38-German Silver is an alloy of Zinc, Copper & Nickel.

39-The element present in the largest amount in rocks and minerals is Silicon.

40-The charcoal used to decolourise raw sugar is Wood charcoal

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