Amongst the following, which should have the highest rms speed at the same temperature?

• SO₂

• CO₂

• O₂

• H₂

Of the following molecules, which have shape similar to CO₂?

• HgCl₂

• SnCl₂

• C₂H₂

• NO₂

In which of the following mixed aqueous solutions, pH =pK_a at equilibrium?

(1) 100 mL of 0.1 M CH₃COOH +100mL 0.1 M CH₃COONa.

(2) 100 mL of 0.1 M CH₃COOH  + 50 mL of 0.1 M NaOH.

(3) 100 mL of 0.1 M CH₃COOH + 100 mL of 0.1 M NaOH.

(4) 100 mL of 0.1 M CH₃COOH + 100 mL of 0.1 M NH_3.

• (1) is correct

• (2) is correct

• (3) is correct

• Both (1) and (2) are correct

Which statement is not correct for ortho and para hydrogen?

• They have different boiling points

• Ortho-form is more stable than para-form

• They differ in their nuclear spin

• The ratio of ortho to para hydrogen changes with change in temperature

Ozonolysis of an alkene produces only one dicarbonyl compound. The structure of the alkene is

• H₃C - CH = CH - CH₃

• 

• 

• CH₃ - CH = CH - CH = CH₃

From the following compounds, choose the one which is not aromatic.

Identify X in the following sequence reactions

The major products obtained during ozonolysis of 2, 3-dimethyl-1-butene and subsequent reductions with Zn and H₂O are

• methanoic acid and 2-methyl-2-butanone

• methanal and 3-methyl-2-butanone

• methanol and 2, 2 -dimethyl-3-butanone

• methanoic acid and 2-methyl-3-butanone

Choose the correct statement(s) among the following.

• 

• CH₃CHO on reaction with HCN gives racemic mixture 

• 

• CH₃-CH=NOH shows geometrical isomerism

20.

Which of the following statement(s) is (are) correct when a mixture of NaCl and K₂Cr₂O₇ is gently warmed with conc. H₂SO₄?

• A deep red vapour is evolved

• The vapour when passed through NaOH solution, gives a yellow solution

• Chlorine gas is also evolved

• Chromyl chloride is formed