Class 11

1. Some basic concepts of chemistry question bank (Chemistry)

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Q1.

Equal masses of H₂, O₂ and methane have been taken in a container of

volume \(V\) at temperature \(27^\circ\text{C}\) in identical conditions.

The ratio of the volumes of gases \(\mathrm{H_2 : O_2 : CH_4}\) would be:

(A)

\(8 : 16 : 1\)

(B)

\(16 : 8 : 1\)

(C)

\(16 : 1 : 2\)

(D)

\(8 : 1 : 2\)

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Q2.

When \(22.4\ \text{litres}\) of \(\mathrm{H_2(g)}\) is mixed with \(11.2\ \text{litres}\) of \(\mathrm{Cl_2(g)}\),

each at S.T.P., the moles of \(\mathrm{HCl(g)}\) formed is equal to:

(A)

\(1\ \text{mol of HCl(g)}\)

(B)

\(2\ \text{mol of HCl(g)}\)

(C)

\(0.5\ \text{mol of HCl(g)}\)

(D)

\(1.5\ \text{mol of HCl(g)}\)

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