Q1. Baryllium 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-historic perido?
(a) Radium dating
(b) Uranium dating
(c) Carbon dating
(d) Deuterium dating
Q3. Cement is made hard with
(b) hydration and dissociation of water
(c) Dissociation of water
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?
(d) Hydrogen peroxide
Q6. In which of the following states maximum iron ore is found?
Q7. “All the four quantum numbers of two electrons in an atom are not the same.” It is the law of —
(b) Exclusion Principle of Pauli
(c) Uncertainty Principle of Hiesenberg
(d) Avogadro’s Law
Q8. Commercial nitric acid is coloured because it contains dissolved:
(b) Nitrous oxide
(c) Nitrogen dioxide
(d) Coloured impurities
Q9. Fertiliser having high nitrogen content is:
(b) Ammonium Sulphate
(c) Ammonium nitrate
(d) Calcium citrate
Q10. Where does the oxygen that keeps us alive come from?
(a) Carbon dioxide
(b) Carbonates absorbed from soil
(c) Oxides of minerals