The osmotic pressure of a solution prepared by dissolving 48 mg of $\mathrm{MgCl}_2$ in 500 mL water at $25^{\circ} \mathrm{C}$ is (Assuming complete dissociation).
(Molar mass of $\mathrm{MgCl}_2=95 \mathrm{~g} / \mathrm{mol}, R=0.0821 \mathrm{L} \cdot \mathrm{atm} / \mathrm{mol} \cdot \mathrm{K}$ )
$2.49 \times 10^{-2} \mathrm{~atm}$
$4.98 \times 10^{-2} \mathrm{~atm}$
$2.49 \times 10^{-3} \mathrm{~atm}$
$4.98 \times 10^{-3} \mathrm{~atm}$
Which of the following compounds on reaction with $\mathrm{CH}_3 \mathrm{MgBr}$ followed by acid hydrolysis gives a tertiary alcohol?
$\mathrm{CH}_3 \mathrm{COCH}_3$
$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CHO}$
$$ \text { Match List-I with List-II. } $$
| List I (Atoms) |
List II (Properties) |
||
|---|---|---|---|
| A. | F | I. | Highest electronegativity |
| B. | Cs | II. | Lowest ionisation energy |
| C. | Na | III. | Strong reducing agent |
| D. | O | IV. | Forms strong hydrogen bonds |
Choose the correct match from the options given below
A-I, B-II, C-III, D-IV
A-I, B-III, C-II, D-IV
A-II, B-I, C-IV, D-III
A-IV, B-II, C-III, D-I
A 2 M aqueous solution of HCl has density $1.08 \mathrm{~g} / \mathrm{mL}$. What is the molality of the solution?
1.98 m
2.08 m
2.22 m
2.38 m
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