No. of oxalic acid molecules in 100 ml of 0.01 M oxalic acid is -

Answer

A, B, C

Explanation

Moles of oxalic acid `=("Molarity" xx "Volume in mL")/1000`
Moles of oxalic acid `=(0.01 xx 100)/1000 = 0.001`
1 mole of oxalic acid `=6.022 xx 10^(23)` molecules
0.001 mole of oxaloic acid `=6.022 xx 10^(23) xx 0.001 = 6.022 xx 10^(20)`