1.4 g

2.8 g

4.4 g

3.2 g

1 mol

0.5 mol

2 mol

0.2 mol

Same proton number

Same electronic configuration

Same electron number

Same size

100 mL

50 mL

200 mL

25 mL

$6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{C}}$

$6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{O}}$

$3.01 imes {10^{23}}molecules\;of\;C{O_2}$

None of the above

Called Loschmidt’s number

Equal to $2.617 imes {10^{19}}{\rm{per mL}}$

Both (1) and (2)

None of the above

P = 20, Q = 15

P = 40, Q = 5

P = 30, Q = 10

P = 10, Q = 20

$18 imes {10^{23}}$ electrons

$6.023 imes {10^{23}}$ electrons

$3.01 imes {10^{23}}$ electrons

$9 imes {10^{23}}$ electrons

12g

22g

44g

66g

4 g of He

20 g of Ne

4 g of $H_2$

28 g of $N_2$

$\,{\rm{1}}{{\rm{0}}^{{\rm{ - 3}}}}\,{\rm{mol}}\,\,{\rm{of}}\,{\rm{water}}$

${\rm{18}}\,{\rm{mL}}\,{\rm{of}}\,{\rm{water}}$

$\,{\rm{0}}{\rm{.00224}}\,{\rm{L}}\,\,{\rm{of}}\,{\rm{water}}\,{\rm{vapours}}\,\,{\rm{at 1 atm }}\,{\rm{and }}\,{\rm{273}}\,\,{\rm{K}}$

${\rm{0}}{\rm{.18}}\,\,{\rm{g}}\,\,{\rm{of}}\,\,{\rm{water}}$