p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 11 to 20 out of 173 Questions
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11.
Which alkali ion is linked to NO3- ion in Indian salt petre ?
(a) Na+
(b) K+
(c) Li+
(d) Cs+
Answer:

Option (b)

12.
To which of the following elements does the electronic configuration [Xe] 4f145d106s26p3 belong ?
(a) Bi
(b) Pb
(c) Po
(d) At
Answer:

Option (a)

13.
Which of the following is not one of the common oxidation states of elements of group-15 ?
(a) -3
(b) +3
(c) -5
(d) +5
Answer:

Option (c)

14.
Which of the following relations can be considered to be correct for first and second ionisation enthalpy for the elements of group-15 ?
(a) ΔiH1 < ΔiH2
(b) ΔiH1 > ΔiH2
(c) ΔiH1 = ΔiH2
(d) ΔiH1 ≥ ΔiH2
Answer:

Option (a)

15.
The order of basic nature of hydride compounds of group-15 is _____ .
(a) PH3 > NH3 > AsH3 > SbH3 > BiH3
(b) NH3 < PH3 < AsH3 < SbH3 < BiH3
(c) NH3 > PH3 > AsH3 > SbH3 > BiH3
(d) NH3 > AsH3 > PH3 > SbH3 > BiH3
Answer:

Option (c)

16.
Which of the following contains nitrogen in -1 oxidation state ?
(a) NO
(b) NH2OH
(c) N2O3
(d) N2H4
Answer:

Option (b)

17.
Which of the following elements will not form stable diatomic molecule ?
(a) Oxygen
(b) Iodine
(c) Phosphorous
(d) Nitrogen
Answer:

Option (c)

18.
Which of the following compounds does not contain the elements of group-15 ?
(a) Na3AS
(b) Zn3Sb2
(c) Ca3P2
(d) CaS
Answer:

Option (d)

19.
What is the correct order of decreasing for the property to form pπ-pπ bond ?

OR

In what order does the property of catenation decrease ?

(a) P, N, As, Bi, Sb
(b) As, Sb, Bi, N, P
(c) N, P, As, Sb, Bi
(d) Bi, As, Sb, P, N
Answer:

Option (c)

20.
State the value of ΔfH in the industrial production of ammonia by Haber process.
(a) -46.1 kJ mol-1
(b) -198.4 kJ mol-1
(c) +92.2 kJ mol-1
(d) 0.00 kJ mol-1
Answer:

Option (a)

Showing 11 to 20 out of 173 Questions
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