Which among the following has the maximum number of molecules?

1. 7 gm N₂

2. 2 gm H₂

3. 16 gm NO₂

4. 16 gm O₂

The percentages of C, H, and N in an organic compound are 40%, 13.3%, and 46.7% respectively.
The empirical formula of the compound is:

Find the molarity of liquid HCl if the density of liquid HCl is 1.17 g/cc.

The percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt = 78.4) then the minimum molecular weight of peroxidase anhydrous enzymes is:

1. $1.568$ $\times$ ${10}^4$

2. $1.568$ $\times$ ${10}^3$

3. 15.68

4. $2.136$ $\times$ ${10}^4$

The specific volume of cylindrical virus particle is $6.02$ $\times$ ${10}^{-2}$ $cc/g\mathrm{m\; w}$hose radius and length are 7 Å & 10Å respectively. If $N_A$ $=$ $6.023$ $\times {10}^{23}$\(\text{mol}^{-1}\), find the molecular weight.

1. \( 15.4 \mathrm{~kg} / \mathrm{mol} \)
2. \(1.54 \times 10^4 \mathrm{~kg} / \mathrm{mol} \)
3. \( 3.08 \times 10^4 \mathrm{~kg} / \mathrm{mol}\)
4. \(3.08 \times 10^3 \mathrm{~kg} / \mathrm{mol}\)

In the Haber process, 30 litres of dihydrogen and 30 litres of dinitrogen were taken for the reaction which yielded only 50% of the expected product. What will be the composition of a gaseous mixture under the above condition in the end:

1 M, 2.5 litre NaOH solution is mixed with another 0.5 M and 3 litre NaOH solution. The molarity of the resultant solution will be:

The volume of CO₂ obtained by the complete decomposition of 9.85 grams of BaCO3 is:

1. 2.24 lit.

2. 1.12 lit.

3. 0.84 lit.

4. 0.56 lit

Which of the following options incorrectly describes the possible range of values for the mole fraction (x) of a component in a mixture?

1. x < 1
2. – 2 ≤ x ≤ 2
3. 0 ≤ x ≤ 1
4. x is always non-negative

The maximum number of molecules is present in: