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

(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 PC_l5 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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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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