MCQ Questions for Class 11 Chemistry Chapter 1. We covered all the MCQ Questions for Class 11 Chemistry Chapter 1 in this post for free so that you can practice well for the exam.
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MCQ Questions for Class 11 Chemistry Chapter 1 Objective
One of the products formed due to the re-action between KMnO4 and HCI is
(A) red liquid
(B) MnO2
(C) greenish yellow gas
(D) HCIO4
Option c – greenish yellow gas
Which of the following is not an element?
(A) Graphite
(B) Diamond
(C) 22-Carat gold
(D) Rhombic sulphur
Option c – 22-Carat gold
Green vitriol is
(A) FeSO4.7H₂O
(B) ZnSO4.7H₂O
(C) CaSO4 2H₂O
(D) CuSO4.5H₂O
Option a – FeSO4.7H₂O
Wrought iron, pig iron and steel differ in properties due to
(A) carbon content
(B) malleability
(C) conductivity
(D) softness
Option a – carbon content
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is.
(A) +4
(B) +6
(C) +2
(D) +3
Option d – +3
How many electrons are involved in the oxidation by KMnO4 in basic medium?
(A) 1
(B) 2
(C) 5
(D) 3
Option a – 1
The number of unpaired electrons in a nickel atom (ground state) are (At. No. of Ni = 28)
(A) 2
(B) 5
(C) 3
(D) 7
Option a – 2
Which one of the following compounds does not decolourise an acidified aqueous solution of KMnO4?
(A) Sulphur dioxide
(B) Ferric chloride
(C) Hydrogen peroxide
(D) Ferrous sulphate
Option b – Ferric chloride
Which of the following contains the maximum number of unpaired electrons
(A) TiCl3
(B) MnCl2
(C) FeSO4
(D) CuSO4
Option b – MnCl2
In Cu (Z = 29)
(A) 13 electrons have spin in one direction and 16 electrons in other direction
(B) 14 electrons have spin in one direction and 15 electrons in other direction
(C) all the electrons have spin in one direction
(D) none of these
Option b – 14 electrons have spin in one direction and 15 electrons in other direction
(NH4)2SO4. FeSO4.6H2O is
(A) Mohr’s salt
(B) Alum
(C) Blue vitriol
(D) Simple salt
Option a – Mohr’s salt
In the chemical reaction Ag2O + H₂O + 2e-2Ag + 2OH
(A) water is oxidised
(B) electrons are reduced
(C) silver is oxidised
(D) silver is reduced
Option d – silver is reduced
Which of the following compounds is expected to be coloured?
(A) Ag2SO4
(B) CuF2
(C) MgF2
(D) CuCl
Option b – CuF2
In the preparation of KMnO4, pyrolusite (MnO2) is first converted to potassium manganate (K2MnO4). In this conversion, the oxidation state of manganese changes from
(A) + 1 to +3
(B) +2 to +4
(C) +3 to +5
(D) +4 to +6
Option d – +4 to +6
Ionic character of halides of metals (3d-transition series) decreases in the order
(A) M-I > M-Br > M-CI > M-F
(B) M-CI > M-Br > M-1 > M-F
(C) M-Br > M-CI > M-F> M-I
(D) M-F> M-CI > M-Br > M-I
Option d – M-F> M-CI > M-Br > M-I
Which of the following group of transition metals is called coinage metals
(A) Cu, Ag, Au
(B) Ru, Rh, Pd
(C) Fe, Co, Ni
(D) Os, Ir, Pt
Option a – Cu, Ag, Au
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