p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 171 to 173 out of 173 Questions
171.
Which of the following is the molecular formula of bleaching powder ?
(a) Ca(OCl)2 • CaCl2
(b) Ca(OCl)2 • CaCl22H2O
(c) Ca(OCl)2 • CaCl2 • Ca(OH)2
(d) Ca(OCl)2 • CaCl2 • Ca(OH)2 • 2H2O
Answer:

Option (d)

172.
HNO3 + X → HPO3 + Y In this equation mention the formulas of X and Y.
(a) X = P4O10,  Y = N2O4
(b) X = P2O5,  Y = N2O5
(c) X = P4O10,  Y = N2O5
(d) X = P2O5,  Y = N2O4
Answer:

Option (c)

173.
(1) Ss+ H2Ol+O3g   H2SO4aq+ O2g(2) Ps+ H2Ol+O3g   H3PO4aq+ O2g(3) Ass+ H2Ol+O3g   H2AsO4aq+ O2gIn the above equations what will be the number of moles of H2Ol,  O3g  and O2g ?
(a) (1) → 1, 3, 3, (2) → 3, 5, 5, (3) → 3, 5, 5
(b) (1) → 1, 3, 5, (2) → 3, 5, 5, (3) → 3, 3, 5
(c) (1) → 3, 5, 3, (2) → 1, 3, 5, (3) → 3, 5, 5
(d) (1) → 3, 5, 5, (2) → 3, 5, 3, (3) → 1, 3, 5
Answer:

Option (a)

Showing 171 to 173 out of 173 Questions