1.

Fill in the blanks from the choices given in brackets:(i) The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ………. (electron affinity, ionisation potential, electronegativity)(ii) The compound that does not have a lone pair of electrons is (water, ammonia, carbon tetrachloride)(iii) When a metallic oxide is dissolved in water, the solution formed has a high concentration of ions. (H+ , H3O+ , OH–) (iv) Potassium sulphite on reacting with hydrochloric acid releases ………….. gas. (Cl2, SO2, H2S) (v) The compound formed when ethene reacts with Hydrogen is ………………………… (CH4, C2H6, C3H8)

Answer»

(i) ionisation potential 

(ii) carbon tetrachloride 

(iii) OH 

(iv) SO

(v) C2H6



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