An organic compound contains 80 % (by wt.) carbon and the remaining percentage of hydrogen. The empirical formula of this compound is:
[Atomic wt. of C is 12, H is 1] 

1.	CH3	2.	CH4
3.	CH	4.	CH2

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:

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 $N_A$ $=$ $6.02$ $\times {10}^{\mathrm{23, }}$find the molecular weight.

1. 15.4 kg/mol

2. $1.54$ $\times$ ${10}^4$ $kg/mol$

3. $3.08$ $\times$ ${10}^4$ $kg/mol$

4. $3.08$ $\times$ ${10}^3$ $kg/mol$

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

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:

1. C₃H₁₃N₃
2. CH₂N
3. CH₄N
4. CH₆N

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

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 is:

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

The incorrect option for mole fraction(x) is:

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

The maximum number of molecules is present in: