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
At 20°C, the vapour pressure of diethyl ether is 442 mm. When 6.4 g of a non-volatile solute is dissolved in 50 g of solvent, the vapour pressure of the solution becomes 410 mm. The molecular mass of the solute is
(A) 150
(B) 130.9
(C) 160
(D) 180
Option b – 130.9
One molar glucose solution boils at 100.54°C. The relative decrease in vapour pressure of aq. urea solutions are 0.018. The elevation in the boiling point of the urea solution is
(A) 0.18°C
(B) 0.36°C
(C) 0.72°C
(D) 0.54°C
Option d – 0.54°C
A solution containing 0.1 g of non-volatile solute P (molar mass 100 g) in 100 g of benzene gives rise in boiling point by 0.2 K. Another solution containing 0.1 g of ‘Q’ non-volatile solute in the same amount of the same solvent gives elevation in B.P. by 0.4 K. The ratio of the molar mass of P and Q is
(A) 1 : 2
(B) 2 : 1
(C) 1 : 4
(D) 4 : 1
Option b – 2 : 1
An aq. solution of sucrose-containing 34.2 g has an osmotic pressure of 2.38 atm at 17°C for an aq. solution of glucose to be isotonic with this solution would have mass
(A) 34.2 g
(B) 17.1 g
(C) 18.0 g
(D) 36.0 g
Option c – 18.0 g
The osmotic pressure of 5% (M/V) solution of sugar at 150°C is
(A) 4 atm
(B) 5.07 atm
(C) 3.55 atm
(D) 2.45 atm
Option b – 5.07 atm
30 g of a solute is added to 90 g of water, and the V.P. of the solution is 21.85 mm at 25°C. If 18 g of water is added to the same solution. V.P. of the solution becomes 22.15 mm. The vapour pressure of the solvent is
(A) 21.35 mm
(B) 75.6
(C) 12:35 mm
(D) 35.21 mm
Option a – 21.35 mm
The isotonic solution has equal
(A) Vapour pressure
(B) Osmotic pressure
(C) Solution pressure
(D) Freezing point
Option b – Osmotic pressure
The ratio of the value of any colligative property of KCl solution to that of sugar solution is
(A) 1
(B) 0.5
(C) 2
(D) 4
Option c – 2
An aqueous solution containing 1 g urea boils at 100.25°C. The aq. solution containing 3 g of glucose in the same volume will boil at
(A) 100.75°C
(B) 100.50°C
(C) 100.25°C
(D) 100°C
Option c – 100.25°C
A compound that acts as a semipermeable membrane is
(A) Calcium sulphate
(B) Nickel phosphate
(C) Barium oxalate
(D) Copper ferrocyanide
Option d – Copper ferrocyanide
Ebullioscopy is concerned with
(A) Osmotic pressure of the solution
(B) Boiling point elevation
(C) Relative lowering in vapour pressure
(D) Freezing point depression
Option b – Boiling point elevation
The osmotic pressure of 0.2 M urea solution at 27°C is
(A) 4.92 atm
(B) 0.29 atm
(C) 9.24 atm
(D) 2.49 atm
Option a – 4.92 atm
The osmotic pressure of the solution increase if
(A) Temperature decreases
(B) the Concentration of solution decreases
(C) No. of solute molecules increases
(D) the Volume increases
Option c – No. of solute molecules increases
The solution having the highest boiling point is
(A) 0.05 M glucose
(B) 0.01 M KNO3
(C) 0.015 M urea
(D) 0.01 M Na₂SO4
Option d – 0.01 M Na₂SO4
Which one is known as oil of vitriol?
(A) H₂SO3
(B) H₂SO4
(C) H₂S₂O7
(D) H₂S₂O8
Option b – H₂SO4
In the preparation of sulphuric acid, V₂O5 is used in the reaction, which is
(A) S + O₂ → SO₂
(B) 2SO2 + O2 →2SO3
(C) SO2 + H₂O → H₂SO3
(D) N₂ + 3H₂ → 2NH3
Option b – 2SO2 + O2 →2SO3
The bond angle in H₂S is
(A) 109°28′
(B) 104°5′
(C) 120°
(D) 92.5°
Option d – 92.5°
The sulfur molecule S8 possesses
(A) a Cubical structure
(B) a Spherical structure
(C) a Tetrahedral structure
(D) a W-shaped ring structure
Option d – a W-shaped ring structure
The correct order of electron affinity of B, C, Ni, and O is
(A) O> C>N> B
(B) B>N> C>O
(C) O> C> B>N
(D) O> B> C> N
Option d – O> B> C> N
The hybridization of sulfur in SO₂ is
(A) sp
(B) sp³
(C) sp³
(D) dsp²
Option c – sp³
Which of the following compounds contains S=O as well as S = S bonds?
(A) Sulphuric acid
(B) Thiosulphuric acid
(C) Sulphurous acid
(D) Thiosulphurous acid
Option c – Sulphurous acid
The geometry of H₂S and its dipole moment is
(A) Angular and non-zero
(B) Angular and zero
(C) Linear and non-zero
(D) Linear and zero
Option a – Angular and non-zero
The correct order of O-O bond length (increasing) in O2, H₂O2, and O3 is
(A) H₂O2 < O3 < O₂
(B) O₂ < 03 <H₂O₂
(C) O₂ < 03 < H₂O₂
(D) O3 <H₂O2 < O₂
Option b – O₂
The bond angle is minimum for
(A) H₂O
(B) H₂S
(C) H₂Se
(D) H₂Te
Option d – H₂Te
Which of the following mixture is chromic acid?
(A) K₂Cr₂O7 and conc. H₂SO4
(B) K₂Cr₂O7 and HCI
(C) K₂SO4 and HCI
(D) H₂SO4 and HCI
Option a – K₂Cr₂O7 and conc. H₂SO4
Carbogen is
(A) Pure from carbon
(B) COCI2
(C) a mixture of CO and CO₂
(D) a Mixture of O2 and CO₂
Option d – a Mixture of O2 and CO₂
The bleaching action of SO₂ is due to
(A) Reduction
(B) Oxidation
(C) Hydrolysis
(D) Its acidic nature
Option a – Reduction
The trioxides which can exist as the monomeric molecule is
(A) SO3 in a gaseous state
(B) TeO3
(C) SO3 in a solid state
(D) SeO3
Option a – SO3 in a gaseous state
The standard heat of combustion of carbon, hydrogen, and CH4 are -349, -241.8, and -906.7 kJ respectively. The std. the heat of formation of CH4 is
(A) 174.1 kJ
(B) 274.1 kJ
(C) 374.1 kJ
(D) 74.1 kJ
Option d – 74.1 kJ
40-joule heat is supplied to the system and work done by a system is 8 joule. Increase in internal energy of the system
(A) 25 J
(B) 30 J
(C) 32 J
(D) 28 J
Option c – 32 J
In the isochoric process, the increase in internal energy is equal to
(A) Heat absorbed
(B) Heat evolved
(C) Work done
(D) Heat absorbed and work done
Option a – Heat absorbed
A system in which there is no exchange of matter, work, or energy from the surrounding is
(A) Closed
(B) Isolated
(C) Adiabatic
(D) Isothermal
Option b – Isolated
An adiabatic process occurs in
(A) Open system
(B) Closed system
(C) Isolated system
(D) In all system
Option c – Isolated system
In the isothermal expansion of a gas
(A) Internal energy increases
(B) Enthalpy decreases
(C) Enthalpy remains unaffected
(D) Enthalpy reduced to zero
Option c – Enthalpy remains unaffected
According to Hess’s law, the heat of reaction. depends upon
(A) the Initial state of reactants
(B) the Initial and final state of reactants
(C) the Intermediate path of the reaction
(D) the End point of conditions of the reactant
Option b – the Initial and final state of reactants
Intensive properties among the following are
(A) Specific heat, and temperature
(B) Entropy, density
(C) Enthalpy, mole fraction
(D) Heat, temperature
Option a – Specific heat, and temperature
Which of the following is not a state function? (i) q + W (ii) q (iii) W (iv) HTS
(A) (i), (ii), (iii)
(B) (ii) and (iii)
(C) (i), (iv)
(D) (ii), (iii), (iv)
Option b – (ii) and (iii)
Which one of the following statements regarding starch and cellulose is not correct?
(a) Both of them are of plant origin.
(b) Both of them are polymers.
(c) Both of them give color with iodine.
(d) Both of them are made up of glucose molecules.
Option c – Both of them give color with iodine
Among the following sweeteners, which one has the lowest sweetness value?
(a) Alitame
(b) Aspartame
(c) Saccharin
(d) Sucralose
Option b – Aspartame
Which one of the following artificial sweeteners is modified sugar?
(a) Aspartame
(b) Succharin
(c) Sucralose
(d) Alitame
Option c – Sucralose
Glucose is a source of energy, which one of the following types of molecule is glucose?
(a) Carbohydrate
(b) Protein
(c) Fat
(d) Nucleic acid
Option a – Carbohydrate
Lactose on hydrolysis gives
(a) glucose
(b) fructose
(c) fructose + glucose
(d) glucose + galactose
Option d – glucose + galactose
Which one of the following carbohydrates is used for the silvering of a mirror?
(a) Sucrose
(b) Maltose
(c) Glucose
(d) Fructose
Option c – Glucose
The reagent which may be used to distinguish between cane sugar and glucose solution is
(a) Molisch’s reagent
(b) Iodine solution
(c) Baeyer’s reagent
(d) Fehling’s solution
Option d – Fehling’s solution
In honey, which one among the following sugars predominates?
(a) Sucrose
(b) Fructose
(c) Galactose
(d) Maltose
Option b – Fructose
The chemical name of vitamin A is
(a) thiamine
(b) axerophthol (retinol)
(c) ascorbic acid
(d) nicothamide
Option a – axerophthol (retinol)
The metal present in Vitamin B₁₂ is
(a) Iron
(b) Manganese
(c) Cobalt
(d) Magnesium
Option c – Cobalt
Which one of the following vitamins is essential for the coagulation of blood?
(a) Vitamin-A
(b) Vitamin-B12
(c) Vitamin-K
(d) Vitamin-D
Option c – Vitamin-K
Which one of the following acids is also known as Vitamin-C?
(a) Methanoic acid
(b) Ascorbic acid
(c) Lactic acid
(d) Tartaric acid
Option b – Ascorbic acid
Which of the following has a coiled helical structure?
(a) Proteins
(b) Lipids
(c) Carbohydrates
(d) Vitamins
Option a – Proteins
Which one of the following polymers is made of proteins?
(a) Rubber
(b) Cotton
(c) Wool
(d) Jute
Option c – Wool
What is the bond between two amino acids in a protein called?
(a) Ester bond
(b) Glycosidic bond
(c) Peptide bond
(d) Phosphodiester bond
Option c – Peptide bond
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