p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 41 to 50 out of 173 Questions
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41.
Stoichiometric ratio of sodium dihydrogen orthophosphate and sodium hydrogen orthophosphate required for synthesis of Na5P3O10 is _____ .
(a) 1.5 : 3
(b) 3 : 1.5
(c) 1 : 1
(d) 2 : 3
Answer:

Option (a)

42.
Which of the following is the formula of Thionyl chloride ?
(a) SO2Cl
(b) SOCl
(c) SO2Cl2
(d) SOCl2
Answer:

Option (d)

43.
State the number of σ and dπ-pπ bonds in pyrophosphoric acid.
(a) 8 and 2
(b) 6 and 2
(c) 12 and 0
(d) 12 and 2
Answer:

Option (d)

44.
What is number of H-atoms linked to P-atom in hypophosphorus acid ?
(a) 3
(b) 1
(c) 2
(d) 0
Answer:

Option (c)

45.
How many non-polar P-H bonds are present in H3PO3 ?
(a) 1
(b) 2
(c) 0
(d) 3
Answer:

Option (a)

46.
What is the correct formula of the salt produced when hypophosphorus acid is neutralized by NaOH ?
(a) Na3PO2
(b) Na3PO3
(c) NaH2PO2
(d) Na2HPO2
Answer:

Option (c)

47.
Phosphorus pentoxide is widely used as _____ .
(a) Reducing agent
(b) Oxidizing agent
(c) Dehydrating agent
(d) Bleaching agent
Answer:

Option (c)

48.
What is the oxidation state of oxygen in OF2 ?
(a) -1
(b) +2
(c) -2
(d) +12
Answer:

Option (b)

49.
What is the descending order of catenation for elements of group-16 ?
(a) O > S > Se > Te
(b) S > O > Se > Te
(c) S > Se > O > Te
(d) O > S > Te > Se
Answer:

Option (b)

50.
Choose the correct order of dissociation enthalpy of M-H bond in the 16 th group.
(a) H2Se > H2Te > H2S > H2O
(b) H2S < H2O < H2Se < H2Te
(c) H2S > H2O > H2Te > H2Se
(d) H2O > H2S > H2Se > H2Te
Answer:

Option (d)

Showing 41 to 50 out of 173 Questions
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