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Explore Class 12 Chemistry past and model questions by chapter, year, marks and question type.
440 questions found
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.
Draw well labelled diagram of standard hydrogen electrode.
Which of the following metal forms amphoteric oxide?
Fe
Ni
Cu
Zn
Why is titration between weak acid and weak base not common?
How many isomeric alcohols are formed from propanol?
2
3
4
5
ΔH and ΔS for chemical reaction is found to be 50 kJ mol⁻¹ and 300 J mol⁻¹ K⁻¹. Is the reaction spontaneous at 15°C?
How can you convert A to B if compound A responds positive iodoform test?
In which of the following vessel aqueous CuSO₄ solution can be safely stored?
Zn-vessel
Fe-vessel
Al-vessel
Ag-vessel
Which of the following has most acidic proton?
CH₃COCH₃
(CH₃)₂C=CH₂
CH₃COCH₂CH₃
(CH₃CH₂)₃CH
Define the term primary standard substance
Define Gibb’s free energy change.
How is D obtained from A?
How can we convert an alkyl halide into alkene?
substitution
addition
elimination
reduction
Predict the spontaneity if ΔH and ΔS are positive.
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
Why is it called reference electrode?