Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 7 The p-Block Elements. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Chemistry The p-Block Elements MCQs Pdf with Answers to know their preparation level.
The p-Block Elements Class 12 Chemistry MCQs Pdf
1. H
2
S is more acidic than H
2
O because
(a) oxygen is more electronegative than sulphur.
(b) atomic number of sulphur is higher than oxygen.
(c) H — S bond dissociation energy is less as compared to H — O bond.
(d) H — O bond dissociation energy is less also compared to H — S bond.
Answer
Answer: b
2. The boiling points of hydrides of group 16 are in the order
(a) H
2
O > H
2
Te > H
2
S > H
2
Se
(b) H
2
O > H
2
S > H
2
Se > H
2
Te
(c) H
2
O > H
2
Te > H
2
Se > H
2
S
(d) None of these
Answer
Answer: b
3. In the manufacture of sulphuric acid by contact process Tyndall box is used to
(a) convert SO
2
and SO
3
(b) test the presence of dust particles
(c) filter dust particles
(d) remove impurities
Answer
Answer: b
4. Fluorine differs from rest of the halogens in some of its properties. This is due to
(a) its smaller size and high electronegativity.
(b) lack of d-orbitals.
(c) low bond dissociation energy.
(d) All of the these.
Answer
Answer: b
5. The set with correct order of acidity is
(a) HClO < HClO
2
< HClO
3
< HClO
4
(b) HClO
4
< HClO
3
< HClO
2
< HClO
(c) HClO < HClO
4
< HClO
3
< HClO
2
(d) HClO
4
< HClO
2
< HClO
3
< HClO
Answer
Answer: b
6. When chlorine reacts with cold and dilute solution of sodium hydroxide, it forms
(a) Cl
–
and ClO
–
(b) Cl
–
and ClO
2
–
(c) Cl
–
and ClO
3
–
(d) Cl
–
and ClO
4
–
Answer
Answer: a
7. The formation of O
2
+
[PtF
6
]
–
is the basis for the formation of first xenon compound. This is because
(a) O
2
and Xe have different sizes.
(b) both O
2
and Xe are gases.
(c) O
2
and Xe have comparable electro-negativities.
(d) O
2
and Xe have comparable ionisation enthalpies.
Answer
Answer: d
8. Partial hydrolysis of XeF
4
gives
(a) XeO
3
(b) XeOF
2
(c) XeOF
4
(d) XeF
2
Answer
Answer: b
9. Helium is preferred to be used in balloons instead of hydrogen because it is
(a) incombustible
(b) lighter than hydrogen
(c) more abundant than hydrogen
(d) non polarizable
Answer
Answer: a
10. The increasing order of reducing power of the halogen acids is
(a) HF < HCl < HBr < HI
(b) HI < HBr < HCl < HF
(c) HBr < HCl < HF < HI
(d) HCl < HBr < HF < HI
Answer
Answer: a
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