Class 12 Chemistry Chapter 7 p Block Elements MCQs | GK Type Questions with Answers on Class 12 Chemistry Chapter 7 p Block Elements

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Questions
1 Which is not easily soluble in water
A H2
B O2
C SO2
D CO2

Answer:SO2
2 The molecular formula of sulphur is (A) (B) (C) (D)
A S
B S2
C S4
D S8

Answer:S8
3 All the elements of oxygen family are
A Non - metal
B Matalloids
C Radioactive
D Plymorphic

Answer:Plymorphic
4 The triatomic species of element oxygen is known as
A Azone
B Polyzone
C Trizone
D Ozone

Answer:Ozone
5 Which of the following acts as pickling agent
A HNO3
B HCl
C H2SO4
D HNO2

Answer: H2SO4
6 Which of the following is no suitable for use in dasiccator to dry substance
A conc H2SO4
B Na2SO4
C CaC12
D P4O10

Answer: conc H2SO4
7 The catalyst used in manufacture of by contact process
A Al2O3
B Cr2O3
C V2O3
D MnO2

Answer:MnO2
8 Which of the following is the best scientific method to test presence of water in a liquid
A Taste
B Smell
C use of litmus paper
D use of onhydrous CaSO4

Answer:use of onhydrous CaSO4
9 Which of the following sulphate is insoluble in water
A CaSO4
B CdSO4
C PbSO4
D Bi2(SO4)3

Answer:PbSO4
10 When sulphur is boiled with Na2SO3 solution, the compound formed is
A Sodium Sulphide
B Sodium Sulphate
C Sodium persulphate
D Sodium thiosulphate

Answer: Sodium thiosulphate
11 Number of unpaired electrons in sulphur is
A 2
B 6
C 8
D 1

Answer: 2
12 H2S reacts with O2 in restricted supply of O2 to form
A H2O + S
B H2O + SO2
C H2O + SO3
D H2SO4 + S

Answer:H2O + S
13 Which of the following mixlure is chromic acid

A K2Cr2O7 and Con. H2SO4
B K2Cr2O7 and HCl
C K2SO4 and Con. H2SO4
D H2SO4 and HCl

Answer: K2Cr2O7 and Con. H2SO4
14 Among KO2, NO2- , BaO2 and NO2+ unpaired electron is present in
A NO2+ and BaO2
B KO2 and BaO2
C KO2
D BaO2

Answer:KO2
15 Which of the element of the oxygen family is most poisonous to human race
A O
B S
C Se
D None

Answer:Se
16 Super phosphate is the mixture of
A Calcium phosphate and H2SO4
B Sodium phosphate and H2SO4
C Potassium phosphate and H2SO4
D None

Answer:Calcium phosphate and H2SO4
17 Which of the following dissociates to give H+ easily
A H2O
B H2S
C H2Te
D H2Se

Answer:H2Te
18 H2SO4 reacts with PCl5 to give
A Thoinyl chloride
B Sulphur monochloride
C Sulphur chloride
D Sulphur utrachloride

Answer:Sulphur chloride
19 Among H2O, H2S, H2Se and H2Te the one with highest boiling point
A H2O
B H2Te
C H2S
D H2Se

Answer:H2O
20 Which of the following is used in artificial respiration
A O2 + CO2
B O2 + CO
C O2 + H2
D All of these

Answer:O2 + CO2

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