CBSE Class 12 Chemistry
Term 1 - MCQs
Q1: Which of the following is a network solid?
(a) SO₂(solid)
(b) I₂
(c) Diamond
(d) H₂O (Ice)
Q2: Which of the following shows anisotropy?
(a) Wood
(b) Sugar
(c) Glass
(d) Sodium Chloride
Q3: Which of the following is true about the value of the refractive index of quartz glass?
(a) Same in all directions
(b) Different in different directions
(c) Cannot be measured
(d) Always zero
Q4: Graphite is a good conductor of electricity due to the presence of __________.
(a) lone pair of electrons
(b) free valence electrons
(c) cations
(d) anions
Q5: Of the following terms used for denoting the concentration of a solution the one which does not get affected by temperature is?
(a) Molarity
(b) Molality
(c) Normality
(d) Formality
Q6: Which of the following solutions is an example of negative deviation from Raoult's law?
(a) Acetone + Ethanol
(b) Carbon tetrachloride + Chloroform
(c) Acetone + Chloroform
(d) Water + Ethanol
Q7: Low concentration of oxygen in the blood and tissues of people living at
high altitude is due to _________.
(a) low temperature
(b) low atmospheric pressure
(c) high atmospheric pressure
(d) both low temperature and high atmospheric pressure
Q8: The van’t Hoff factor (i) accounts for
(a) degree of solubilisation of solute.
(b) the extent of dissociation of solute.
(c) the extent of dissolution of solute.
(d) the degree of decomposition of solution.
Q9: Fluorine differs from the rest of the halogens in some of its properties. This is due to
(a) its smaller size and high electronegativity.
(b) lack of d-orbitals.
(c) low bond dissociation energy.
(d) All of these.
Q10: When chlorine reacts with hot and conc. NaOH, the products formed are:
(a) Chloride
(b) hypochlorite
(c) chlorate
(d) a mixture of chloride and chlorate
Q11: Which of the following molecule does not possess a permanent dipole moment?
(a) H₂S
(b) SO₂
(c) SO₃
(d) CS₂
Q12: When XeF4 is treated with water, it forms –
(a) Only Xe
(b) both Xe and XeO₃
(c) only XeO₃
(d) Both XeO₃ and XeOF₄
Q13: Fitting reaction can be used to prepare
(a) Toluene
(b) Acetophenone
(c) Diphenyl
(d) Chlorobenzene
Q14: Iodoform can be prepared from all except
(a) butan-2-one
(b) acetophenone
(c) propan-2-ol
(d) propan-1-ol
Q15: The conversion of an alkyl halide into alcohol by aqueous NaOH is classified as:
(a) a dehydrohalogenation reaction
(b) a substitution reaction
(c) an addition reaction
(d) a dehydration reaction
Q16: Halogenation of alkanes is:
(a) An oxidative process
(b) A reductive process
(c) An isothermal process
(d) An endothermal process
Q17: When oxalic acid is heated with glycerol we get
(a) Formic acid
(b) Acetic acid
(c) Lactic acid
(d) Tartaric acid
Q18: Phenols are more acidic than alcohols because
(a) Phenoxide ion is stabilised by resonance
(b) Phenols are more soluble in polar solvents
(c) Phenoxide ion does not exhibit resonance
(d) Alcohols do not lose H atoms at all
Q19: Hydrolysis of sucrose gives
(a) Glucose only
(b) Glucose + fructose
(c) Glucose and galactose
(d) Maltose
Q20: The simplest amino acid is
(a) alanine
(b) valine
(c) glycine
(d) leucine
Answer:
1: (c) Diamond
2: (d) Sodium Chloride
3: (a) Same in all directions
4: (b) free valence electrons
5: (b) Molality
6: (c) Acetone + Chloroform
7: (b) low atmospheric pressure
8: (b) the extent of dissociation of solute.
9: (d) All of these.
10: (d) mixture of chloride and chlorate
11: (d) CS₂
12: (b) both Xe and XeO₃
13: (c) Diphenyl
14: (d) propan-1-ol
15: (b) a substitution reaction
16: (a) An oxidative process
17: (a) Formic acid
18: (a) Phenoxide ion is stabilised by resonance
19: (b) Glucose + fructose
20: (c) glycine
ЁЯСЙSee Also:
Solid State - Crystalline Solids vs Amorphous Solids
Chapter 2 - Solutions (Important Points)
Chapter 2 - Solutions (Very Short Q & A)
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