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Explore Class 12 Chemistry past and model questions by chapter, year, marks and question type.
440 questions found
Why is it called reference electrode?
You are given E°Zn²⁺/Zn = –0.76 V, E°Pb²⁺/Pb = –0.13 V design a cell notation for an cell and calculate emf of the cell.
What happens when E is treated with O₂ in presence of sunlight?
A list of compounds are given as follows:
benzamide, aniline, benzene, benzoic acid, toluene
Prepare a correct sequence of reaction with suitable condition and reagents.
What is pseudo first order reaction? Write one suitable example.
Draw the diagram showing effective collision.
Point out the limitation of Ostwald’s dilution law.
Why is aqueous solution of sodium chloride neutral?
What happens when ethanal reacts with:
a) 2,4-DNPH (2,4-dinitrophenyl hydrazine)
b) HCN
c) Tollens’ reagent
Write the raw materials for paper production.
Make a sequence of reaction to convert A into C.
Write the chemistry of corrosive sublimate.
What is the pH of the solution of 10 mL H₂SO₄ of 10⁻⁷ M?
0
< 7
7
> 7
Half life period is directly proportional to the initial concentration of the reactant. What is the order of the reaction?
zero order
second order
first order
third order
A white solid halide of metal forms a white precipitate mixture with ammonia. Which of the following is the halide?
HgCl₂
HgI₂
Hg₂I₂
Hg₂Cl₂
Which of the following has most acidic proton?
CH₃COCH₃
(CH₃)₂C=CH₂
CH₃COCH₂CH₃
(CH₃CH₂)₃CH
Why is titration between weak acid and weak base not common?
If 10 mL of N/10 (f = 1.01) oxalic acid neutralized 10 mL of x% (w/v) NaOH solution. Find the value of x.
How can we convert an alkyl halide into alkene?
substitution
addition
elimination
reduction
What does the compound (B) gives under Clemmensen’s reduction?
benzaldehyde
benzoic acid
toluene
benzene-nitrile