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Explore Class 12 Chemistry past and model questions by chapter, year, marks and question type.
440 questions found
What happens when Q is heated with sodalime?
Compound Y can be formed from an alkene. Name the alkene and write reactions involved.
Identify the compound Y
Why is phenol more easily nitrated than benzene?
How is ethanoic acid prepared from the following compounds?
i. CH₃MgBr ii. CH₃CN iii. CH₃ONa
Give the chemical reaction for the preparation of phenol from chlorobenzene.
Convert ethanoic acid into methanoic acid.
Identify P, Q, R, S and T with necessary chemical reactions.
Which of the following reagent converts carboxylic acid to anhydride?
P₂O₅
CaO
LiAlH₄
Na/C₂H₅OH
Which of the following is the correct order of boiling point of following compounds?
A. CH₃CHO
B. C₂H₅OH
C. CH₃COOH
A > B > C
C > A > B
C > B > A
B > C > A
What does the conc. HNO₃ act during the nitration of benzene?
acid
base
electrophile
nucleophile
What is the number of d-electrons of Cr in [Cr(H₂O)₆]³⁺ ion?
2
3
4
5
Which reaction does the following represent?
zero order
first order
second order
third order
Define order of reaction.
Identify Z in the following reaction.
aniline
benzene diazonium chloride
phenyl isocyanide
nitrobenzene
If the temperature increases by 20°C what will be its effect in rate of reaction?
How many times the rate of reaction increase if the concentration of both A and B are doubled?
With which chemical does the mercury sticks to the surface of glass?
H₂O
CO₂
H₂
O₃
Find the resulting normality of mixture.
How does Y react with HCN?