1. A metal M readily forms water soluble sulphate MSO₄, water insoluble hydroxide M(OH)₂ and oxide MO which becomes inert on heating. The hydroxide is soluble in NaOH. The metal M is

2. Alkali metals give a _________________when dissolved in liquid ammonia

3. The stability of the following alkali metal chlorides follows the order

4. Which of the following metals is not manufactured by electrolysis?

5. Carnallite is the mineral of:

6. The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to

7. The substance not likely to contain CaCO₃ is

8. Usually CaCl₂ is preferred over NaCl for cleaning snow on roads particularly in very cold countries this is because

9. The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?

10. CsOH is

11. The wire of flash bulb is made up of:

12. The paramagnetic species is

13. The basic strength of which hydroxide is maximum

14. What happens when Calcium carbonate is heated to 1200 K?

15. The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.

16. Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?

17. What are Oxo-Acids?

18. In curing cement plasters, water is sprinkled from time to time. This helps in

19. Solubilities of carbonates decrease down the Magnesium group due to decrease in

20. Milk of lime reacts with chlorine to form ________, a constituent of bleaching powder.