Question

Fill in the blanks with correct options given in brackets:
(i) If an element shows two different positive valencies, then for the lower valency lower valency the suffix ––––––––is used ["ous"/ "ic"]
(ii) Decomposition rate of hydrogen peroxide gets enhanced in the presence of ––––––––––catalyst [MnO₂/CuCl₂]
(iii) Mercuric oxide on heating decomposes to give oxygen and ––––––––[Mercury/Mercury oxide]
(iv) Slightly acidic nature of rain is due to the formation of weak––––––[H₂CO₃/H₂SO₄]
(v) The magnitude of negative charge carried by electron is ––––––––[1.6 ×10⁻¹⁹C / 9.1×10⁻³¹C ]

Answer 1

–ous

MnO₂

Mercury

H₂CO₃

1.6 ×10⁻¹⁹C

Explanation:

Fill in the blanks with correct options given in brackets:

(i) If an element shows two different positive valencies, then for the lower valency lower valency the suffix ous is used.

(ii) Decomposition rate of hydrogen peroxide gets enhanced in the presence of MnO₂ catalyst.

(iii) Mercuric oxide on heating decomposes to give oxygen and Mercury.

(iv) Slightly acidic nature of rain is due to the formation of weak H₂CO₃.

(v) The magnitude of negative charge carried by electron is 1.6 ×10⁻¹⁹C.