- Aonly $CuF_2$ is ionic
- Bboth $CuCl_2$ and $CuBr_2$ are covalent
- C$CuF_2$ and $CuCl_2$ are ionic but $CuBr_2$ is covalent
- ✓Both $(a)$ and $(b)$
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$\mathrm{A} \stackrel{700 \mathrm{K}}{\rightarrow}$ Product
$\mathrm{A}\xrightarrow[\text { catalyst }]{500 \mathrm{K}} $ Product
it was found that $\mathrm{E}_{\mathrm{a}}$ is decreased by $30 \;\mathrm{kJ} / \mathrm{mol}$ in the presence of catalyst.
If the rate remains unchanged, the activation energy for catalysed reaction is (Assume pre exponential factor is same $):$

$A. RNA$ is regarded as the reserve of genetic information.
$B. DNA$ molecule self-duplicates during cell division
$C. DNA$ synthesizes proteins in the cell.
$D$. The message for the synthesis of particular proteins is present in $DNA$
$E$. Identical $DNA$ strands are transferred to daughter cells.
