Chemical Reaction & Equations Objectives

 

 

Q.51.&Which of the following reactions is/are a double displacement reactions (s) ?
(i) AgNO₃ + NaBr → NaNO₃ + AgBr
ii) BaCI₂ + H₂ SO₄ → BaSO₄ + 2HCI
(iii) As₄ O₄ + 3H₂ S → As₂ S ₃ + 3H ₂ O
(iv) NaOH + HCI → NaCI + H₂ O
(A) (i) & (ii)
(B) only (iii)
(C) only (iv)
(D) (i) to (iv) all

Answer

Answer: D

Q.52.&AgNo₃ (a) + NACI (Aq) → AgCI (s) + NaNO₃ (Aq) Above reaction is a –
(A) precipitation reaction
(B) double displacement reaction
(C) combination reaction
( D) (A) and (B) both
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Answer

Answer: D

Q.53.&H2 SO₄ + 2NaOH → Na₂ SO₄ + 2H₂ O
Above equation is a:-
i) neutralization reaction
(ii) double displacement reaction
(iii) decomposition reaction
(iv) addition reaction
(A) (i) to (iv) all
(B) (i) and (ii)
(C) (i) and (iii)
(D) (ii) and (iv)

Answer

Answer: B

Q.54.&Zn + H₂ SO₄ (dil) → ZnSO₄ + H₂ ↑
Above equation is a=
(A) Decomposition
(B) Single displacement reaction
(C) Combination reaction
(D) Synthesis reaction

Answer

Answer: B

Q.55.&The reaction in which two compounds exchange their ions to form two new compounds is
(A) a displacement reaction
(B) a decomposition reaction
(C) an addition reaction
(D) a double displacement reaction

Answer

Answer: D

Q.56.&In the reaction Mg + CI₂ → MgCI₂ Chlorine may be regarded as –
(A) an oxidizing agent
(B) a reducing agent
(C) a catalyst
(D) providing an inert medium

Answer

Answer: A

Q.57.&When the gases sulfur dioxide and hydrogen sulfide react, the reaction is SO₂ + 2H₂ S → 2H₂ O + 3S Here hydrogen sulfide is acting as –
(A) an oxidizing agent
(B) a reducing agent
(C) a dehydrating agent
(D) a catalyst

Answer

Answer: B

Q.58.&Which of the following statements is/are false for oxidation reaction?
(A) Gain or addition of electro negative radical
(B) Removal of hydrogen atom.
(C) Removal or loss of electro positive radical or element
(D) None of these .

Answer

Answer: D

Q.59.&CiO + H₂ → H₂ O + Cu, reaction is an example of –
(A) redox reaction
(B) synthesis reaction
(C) neutralization
(D) analysis reaction

Answer

Answer: A

Q.60.&Which of the following is an example of oxidation reaction ?
(A) Sn⁺² – 2e^– → Sn⁺⁴
(B) Fe⁺³ + e^– → Fe⁺²
(C) CI₂ + 2e^– → 2CI
(D) None of these

Answer

Answer: A

Q.61.&In the process of burning of magnesium in air, magnesium undergoes –
(A) reduction
(B) sublimation
(C) oxidation
(D) all of these

Answer

Answer: c

Q.62.&A substance which oxidizes itself and reduces other is known as
(A) an oxidizing agent
(B) a reducing agent
(C) Both of these
(D) None of these.

Answer

Answer: B

Q.63.&Oxidation is a process which involves –
(A) addition of oxygen
(B) removal of hydrogen
(C) loss of electrons
(D) All are correct

Answer

Answer: D

Q.64.&In the reaction PbO + C → Pb + CO.
(A) PbO is oxidized
(B) C acts as oxidizing agent.
(C) C acts as a reducing agent.
(D) This reaction does not represent a redox reaction.

Answer

Answer: c

Q.65.&A redox reaction is one in which –
(A) both the substances are reduced.
(B) both the substances are oxidized.
(C) and acid is neutralized by the base.
(D) one substance is oxidized, which the other is reduced.

Answer

Answer: D