$\mathrm{For\; a\; given\; reaction\; -\; 2}\mathrm{ Zn}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2\mathrm{ZnO}\left(\mathrm{s}\right),<mspace\; width="1em"></mspace>$
$∆\mathrm{H}=-693.8<mspace\; width="1em"></mspace>\mathrm{kJ}<mspace\; width="1em"></mspace>{\mathrm{mol}}^{-1}$

The correct statements among the following are :

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, c)

A sample containing 1.0 mol of an ideal gas undergoes an isothermal, reversible expansion to ten times its original volume in two separate experiments. The expansion is carried out at temperatures of 300 K and 600 K, respectively.

The correct statements among the following are:

1. (a) and (b)

2. (b) and (c)

3. (c) and (d)

4. (a) and (d)

For the graph given below, it can be concluded that work done during the process shown will be-

Consider the following graph.

The work done, as per the graph above, is:

1.0 mol of a monoatomic ideal gas is expanded from state (1) to state (2) as shown in the graph below:

The work done for the expansion of gas from state (1) to state (2) at 298 K will be:

1. 1617.6 J

2. -1617.6 J

3. 1717.6 J

4. -1717.6 J