MCQ
Which of the following solid has maximum melting point ?
- A$NaCl$
- B$Ice$
- C$Dry\, ice$
- ✓$SiO_2$
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(Given molar mass of methane in $\mathrm{g} \mathrm{mol}^{-1}: 16$ )
Assertion : For hydrogenation reactions, the catalytic activity increases from Group $5$ to Group $11$ metals with maximum activity shown by Group $7-9$ elements.
Reason : The reactants are most strongly adsorbed on group $7-9 $ elements.