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Explore Class 12 Chemistry past and model questions by chapter, year, marks and question type.
440 questions found
Write any two differences between primary standard and secondary standard substance.
Determine the normality of the acid.
Write down net cell reaction.
Which of the following is the purest form of iron?
Cast iron
Steel
Haematite
Wrought iron
Nitrobenzene can be prepared from benzene by using a mixture of conc. nitric acid and conc. H₂SO₄ in the nitrating mixture. What is the role of nitric acid?
A base
An acid
A catalyst
A reducing agent
You are given (I) aniline, (II) o-nitroaniline, (III) p-nitroaniline and (IV) m-nitroaniline. What is the order of increasing basic nature?
II < I < III < IV
I < II < III < IV
II < III < I < IV
II < III < IV < I
For what purpose is the hydrogen-oxygen fuel cell used in spacecraft?
Power for heat and light
Power for pressure
Power for propulsion
Power for uplift
Which of the following indicates lithophone?
Which of the following mechanisms can occur in the hydrolysis of isopropyl chloride?
SN¹ Mechanism
SN² Mechanism
SN¹ and SN² Mechanism
Neither SN¹ nor SN² Mechanism
State Hess’s law of constant heat summation and illustrate it with an example.
Tollen’s test
What would be the product when benzaldehyde is heated with conc. NaOH?
Benzyl alcohol and sodium benzoate
Sodium benzoate and benzaldehyde
Sodium benzoate and benzene
Benzyl alcohol and benzene
What is meant by weak electrolyte?
Which order of reaction does the following chemical equation represent?
Zero order
Pseudo-first order
Second order
Third order
What is the order of reaction with respect to ?
Ethanal reacts with 2,4-DNP?
What is the normality of 5% Na₂CO₃ solution?
0.94 N
0.98 N
0.99 N
1.01 N
Which of the following is the ionic product of water at 393 K?
Greater than
Less than
Equal to
Equal to
Heat of formation of CO₂ and H₂O are −94 kcal and −68 kcal, respectively. Calculate heat of reaction when 2 moles of CH₄ is formed.
Point out any two limitations of Ostwald’s dilution law.