MCQ
Electrovalent compounds do not have
- ✓High $M.P.$ and Low $B.P.$
- BHigh dielectric constant
- CHigh $M.P.$ and High $B.P.$
- DHigh polarity
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The equilibrium constant of the reaction $2N{H_3} + \frac{5}{2}{O_2} \rightleftharpoons 2NO + 3{H_2}O$ in terms of $K_1, K_2$ and $K_3$ is

$CO_{2(g)} + C_{(s)} \to 2CO_{(g)}$
The number of following statements which is/are correct about phenolphthalein is $.....$.
$A$. It can be used as an indicator for the titration of weak acid with weak base.
$B$. It begins to change colour at $pH =8.4$
$C$. It is a weak organic base
$D$. It is colourless in acidic medium
