Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

Answer is (ii) 27.27%

Correct option (D) K2CO3 Explanation : Alkali metal carbonates (except Li2CO3) do not decompose on heating.

ZnO + C  (i) Zinc oxide.  (ii) Carbon.

(a) Amphoteric oxide . (b) Amphoteric oxide . (c) Aluminium, Al. (d) Zinc, Zn .

The metals placed higher in the activity series (i.e. Na and K) are stable to heat and soluble in water. Whereas metals like Ca, Mg, Al, Zn, Fe, Pb, Cu decompose...

(a) Ammonia is basic in nature. (b) Copper oxide because CuO is less reactive can be reduced by C, CO or by hydrogen whereas Al2O3, Na2O, MgO are reduced by electrolysis.

Reducing property.

1. Carbon dioxide and methane, nitrous oxide, water vapour and CFCs are examples of greenhouse gases.  2. Global Warming is a major cause of climate change.  3. The increase in earth’s temperature...

A gas which dilutes the activity of oxygen in the air is nitrogen.

Column A Column B 1. A mixture of oxygen and carbon dioxide used for artificial respiration. (c) Carbogen 2. A compound which on strong heating yields oxygen gas. (d) Potassium nitrate 3. The process of coating...