Inorganic Chemistry MCQ with Answers

141) Which pair of oxy-acids of phosphorus contain P−H bonds?

Answer is:

H₃PO₃, H₃PO₂

142) SiCl₄ on hydrolysis forms X and HCl. Compound X loses water at 1000^oC and gives Y. Compounds X and Y are respectively:

Answer is:

H₄SiO₄, SiO₂

143) Fluorine is not tested by Beilstein′s test because:

Answer is:

Copper fluoride is not volatile

Explanation:

Fluoride can not be detected by this test because the CuF₂ formed loses fluorine only at a molten stage above 950^oC, which is difficult to be attained in the lab i.e., it is not volatile, and hence, the presence of fluoride can not be detected by this test.

144) Boron has an unusually high melting point due to:

Answer is:

Very strong crystalline lattice

145) The relative stability of +1 oxidation state progressively increases in the order:

Answer is:

141) Which pair of oxy-acids of phosphorus contain P−H bonds?

H3PO3, H3PO2

142) SiCl4 on hydrolysis forms X and HCl. Compound X loses water at 1000oC and gives Y. Compounds X and Y are respectively:

H4SiO4, SiO2

143) Fluorine is not tested by Beilstein′s test because:

Copper fluoride is not volatile

144) Boron has an unusually high melting point due to:

Very strong crystalline lattice

145) The relative stability of +1 oxidation state progressively increases in the order:

Al < Ga < In < Tl

H₃PO₃, H₃PO₂

142) SiCl₄ on hydrolysis forms X and HCl. Compound X loses water at 1000^oC and gives Y. Compounds X and Y are respectively:

H₄SiO₄, SiO₂