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CHEMISTRY PREVIOUS YEAR QUESTIONS

Q1. Beryllium Sulphate is less soluble in water due to ?
(a)High inflammable energy
(b) Low Energy of dissociation
(c) Low inflammable energy
(d) ionic band

Q2. What is the name of that system which uses
radioactivity to decide the period of materials of pre
his tone period ?
(a) Radium dating
(b) Uranium dating
(c) Carbon dating
(d) Deuterium dating

Q3. Cement is made hard with
(a) dehydration
(b) hydration and dissociation of water
(c) Dissociation of water
(d) Polymerisation

Q4. What happens when a chemical bond is formed ?
(a) energy is always absorbed
(b) energy in always released
(c) more energy is released than is absorbed
(d) energy is neither released nor absorbed

Q5. Which among the following is a carbohydrate ?
(a) Nylon
(b) Cane sugar
(c) Turpentine
(d) Hydrogen peroxide

Q6. In which of the following states maximum iron ore is
found ?
(a) FeC03
(b) Fe203
(c) Fe304
(d) FeS2

Q7.Which one of the following metals pollutes the air of a
city having large number of automobiles?
(a) Cadmium
(b) Chromium
(c) Lead
(d) Copper

Q8. What is the Chemical name for baking soda?

(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium nitrite
(d) Sodium nitrate

Q9. An atomic pile is used for
(a) producing X rays
(b) conducting nuclear fission
(c) conducting thermonuclear fusion
(d) accelerating atoms

Q10. Which of the following gases is present under
pressure in soft drinks?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Nitrous oxide

Q11. The substance which does not expand on going from
liquid state to solid state is
(a) Water
(b) Castiron
(c) Aluminium
(d) Type metal

Q12. Heart pacemakers is
(a) Uranium
(b) Deuterium
(c) Plutonium
(d) Radium

Q13. The element which is commonly used in nuclear for
producing electricity by nuclear fission is
(a) Radium
(b) Plutonium
(c) Uranium
(d) Deuterium

Q14. Table salt gets moist during rainy season because
(a) sodium chloride is hygroscopic
(b) sodium chloride is deliquescent
(c) sodium chloride contains some quantity of
sodium iodide
(d) sodium chloride contains hygroscopic impurities
like magnesium chloride

Q15. Which of the following is used as a lubricant in heavy
machines?
(a) Bauxite
(b) Sulphur
(c) Phosphorus
(d) Graphite

Q16. The anode in a dry cell consists of
(a) Copper
(b) Zinc
(c) Cadmium
(d) Graphite