5
MCQ (Single Correct Answer)
The number of atoms present in one mole of an element is equal to Avogadro number. Which of the following element contains the greatest number of atoms?
A
4 g He
B
46 g Na
C
0.40 g Ca
D
12 g He
6
MCQ (Single Correct Answer)
If the concentration of glucose $\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)$ in blood is $0.9 \mathrm{~g} \mathrm{~L}^{-1}$, what will be the molarity of glucose in blood?
A
5 M
B
50 M
C
0.005 M
D
0.5 M
7
MCQ (Single Correct Answer)
What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water?
A
0.1 m
B
1 M
C
0.5 m
D
1 m
8
MCQ (Single Correct Answer)
One mole of any substance contains $6.022 \times 10^{23}$ atoms/molecules. Number of molecules of $\mathrm{~H}_2 \mathrm{SO}_4$ present in 100 mL of $0.02 \mathrm{~M} \mathrm{~H}_2 \mathrm{SO}_4$ solution is ............. .
A
$12.044 \times 10^{20}$ molecules
B
$6.022 \times 10^{23}$ molecules
C
$1 \times 10^{23}$ molecules
D
$12.044 \times 10^{23}$ molecules
9
MCQ (Single Correct Answer)
What is the mass per cent of carbon in carbon dioxide?
A
$0.034 \%$
B
$27.27 \%$
C
$3.4 \%$
D
$28.7 \%$