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1. Some basic concept of chemistry — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry1. Some basic concept of chemistry1 Mark
MCQ
The number of water molecules is maximum in
  • A
    $1.8\ gram$ of water
  • B
    $18\ gram$ of water
  • ✓
    $18\ moles$ of water
  • D
    $18$ molecules of water.
✓

Answer

Correct option: C.
$18\ moles$ of water
c
No of moles of water in $1.8 \mathrm{g}=0.1$ moles

$\ln 18 \;\mathrm{g}=1 \mathrm{moles}$

$1\; mole$ contain $6.022 \times 10^{23}$ molecules of water

so $18\; moles$ contain maximum number of molecules

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