General Studies  Chemistry

31. Which gas is used in Advertisement Lamp

Helium Neon Xenon None

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32. Longest period of periodic table

2 4 6 7

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33. Rusting of iron is an example of

Slow reaction Oxidation reaction Chemical reaction All

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34. Melting of ice is an example of

Endothermic reaction Reversible reaction both a and b All

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35. Nucleus of atom contains

Proton Electron Neutron both a and c

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36. Which is used in seeding clouds

Potassium iodide calcium carbonate Sulphur di-oxide ammonium Phosphate

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37. Tsunami is a example of

Periodic change Non Periodic change Desirable change Undesirable change

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38. atomic number of carbon

3 6 8 9

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39. Example of alkali

NaOH KOH Ca(OH)2 All

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40. At STP volume occupied by one mole of gas

22.4litre 224litre 220litre 2.24litre

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