Q51. Consider the following reactions $\mathrm { NiS } + \mathrm { HNO } _ { 3 } + \mathrm { HCl } \rightarrow \mathrm { A } + \mathrm { NO } + \mathrm { S } + \mathrm { H } _ { 2 } \mathrm { O }$ $\mathrm { A } + \mathrm { NH } _ { 4 } \mathrm { OH } + \mathrm { H } _ { 3 } \mathrm { C } - \mathrm { C } = \mathrm { N } - \mathrm { OH }$ $\rightarrow \mathrm { B } + \mathrm { NH } _ { 4 } \mathrm { Cl } + \mathrm { H } _ { 2 } \mathrm { O }$ The number of protons that do not involve in $\mathrm { H } _ { 3 } \mathrm { C } - \mathrm { C } = \mathrm { N } - \mathrm { OH }$ hydrogen bonding in the product $B$ is $\_\_\_\_$ . Q52.For hydrogen atom, energy of an electron in first excited state is $- 3.4 \mathrm { eV } , \mathrm { K }$. E. of the same electron of hydrogen atom is $x \mathrm { eV }$. Value of $x$ is $\_\_\_\_$ $\times 10 ^ { - 1 } \mathrm { eV }$. (Nearest integer)
Q51. Consider the following reactions $\mathrm { NiS } + \mathrm { HNO } _ { 3 } + \mathrm { HCl } \rightarrow \mathrm { A } + \mathrm { NO } + \mathrm { S } + \mathrm { H } _ { 2 } \mathrm { O }$\\
$\mathrm { A } + \mathrm { NH } _ { 4 } \mathrm { OH } + \mathrm { H } _ { 3 } \mathrm { C } - \mathrm { C } = \mathrm { N } - \mathrm { OH }$\\
$\rightarrow \mathrm { B } + \mathrm { NH } _ { 4 } \mathrm { Cl } + \mathrm { H } _ { 2 } \mathrm { O }$ The number of protons that do not involve in $\mathrm { H } _ { 3 } \mathrm { C } - \mathrm { C } = \mathrm { N } - \mathrm { OH }$ hydrogen bonding in the product $B$ is $\_\_\_\_$ .
Q52.For hydrogen atom, energy of an electron in first excited state is $- 3.4 \mathrm { eV } , \mathrm { K }$. E. of the same electron of hydrogen atom is $x \mathrm { eV }$. Value of $x$ is $\_\_\_\_$ $\times 10 ^ { - 1 } \mathrm { eV }$. (Nearest integer)