Class 12 Chemistry 2019 Board Exam

The colligative property used for the determination of molar mass of polymers and proteins is :
(a) Osmotic pressure
(b) Depression in freezing point
(c) Relative lowering in vapour pressure
(d) Elevation is boiling point

Which of the following is affected by catalyst ?
(a) ΔH
(b) ΔG
(c) Ea
(d) ΔS

The most common and stable oxidation state of a Lanthanoid is :
(a) + 2
(b) + 3
(c) + 4
(d) + 6

The compounds [Co(SO₄) (NH₃)₅] Br and [Co(Br) (NH₃)₅] SO₄ represent :
(a) optical isomerism
(b) linkage isomerism
(c) ionisation isomerism
(d) coordination isomerism

The synthesis of alkyl fluoride is best obtained from :
(a) Free radicals
(b) Swartz reaction
(c) Sandmeyer reaction
(d) Finkelstein reaction

The conversion of an alkyl halide into an alkene by alcoholic KOH is classified as
(a) a substitution reaction
(b) an addition reaction
(c) a dehydrohalogenation reaction
(d) a dehydration reaction

Among the following, which is the strongest base ?
(a) Aniline
(b) N-methylaniline
(c) Benzylamine
(d) p-nitroaniline

Which of the following is a non-reducing sugar ?
(a) Sucrose
(b) Maltose
(c) Glucose
(d) Lactose

What is the correct IUPAC name of the given compound ? (Compound structure given: CH₃-CH(CH₃)-CH₂-CH₃-COOH)
(A) 2,2-Dimethylbutanoic acid
(B) 2-Carboxyl-2-methylbutane
(C) 2-Ethyl-2-methylpropanoic acid
(D) 3-Methylbutane carboxylic acid

The correct cell to represent the following reaction is :
Zn + 2Ag⁺ ⟶ Zn²⁺ + 2Ag

(a) $2\text{Ag}\mid {\text{Ag}}^{+}\mid \mid \text{Zn}\mid {\text{Zn}}^{2+}$
(b) ${\text{Ag}}^{+}\mid \text{Ag}\mid \mid {\text{Zn}}^{2+}\mid \text{Zn}$
(c) $\text{Ag}\mid {\text{Ag}}^{+}\mid \mid \text{Zn}\mid {\text{Zn}}^{2+}$
(d) $\text{Zn}\mid {\text{Zn}}^{2+}\mid \mid {\text{Ag}}^{+}\mid \text{Ag}$