Q. The amount of metallic $Zn$ (Atomic weight $=65.4$) required to react with aqueous sodium hydroxide to produce $1$g of $H_2$ is:

1. $98.1$g
2. $32.7$g
3. $65.4$g
4. $16.3$g

Q. Compound $X$ on heating with $Zn$ dust gives compound $Y$ which on treatment with $O_3$ followed by reaction with $Zn$ dust gives propionaldehyde. The structure of $X$ is:

1. 
   
2. 
   
3. 
   
4. 
   

Q. The number of $s{p}^2$ hybridized carbon atoms in the given compound is:

1. 3
2. 5
3. 4
4. 6

Q. The structure of cis-3-hexene is:

1. 
   
2. 
   
3. 
   
4. 
   

Q. The degree of dissociation of acetic acid $(0.1mol.L^{-1})$ in water $(K_a$ of acetic acid is ${10}^{-5})$ is:

1. $0.01$
2. $0.5$
3. $0.1$
4. $1.0$

Q. The number of valence electrons in an atom with electronic configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^3$ is:

1. 2
2. 3
3. 5
4. 11

Q. Natural abundances of ${}^{12}C$ and ${}^{13}C$ isotopes of carbon are $99\%$ and $1\%$, respectively. Assuming they only contribute to the mol. wt. of $C_2{F}_4$, the percentage of $C_2{F}_4$ having a molecular mass of $101$ is:

1. $1.00$
2. $98$
3. $99$
4. $0.198$

Q. The pair of atoms having the same number of neutrons is:

1. ${}_6^{12}C,{}_{12}^{24}Mg$
2. ${}_{11}^{23}Na,{}_9^{19}F$
3. ${}_{11}^{23}Na,{}_{12}^{24}Mg$
4. ${}_{11}^{23}Na,{}_{19}^{39}K$

Q. The molecule having a formyl group is:

1. Acetaldehyde
2. Acetic acid
3. Acetone
4. Acetic anhydride

Q. $2,3$-Dimethylbut-$2$-ene when reacted with bromine forms a compound which upon heating with alcoholic $KOH$ produces the following major product.

1. 
   
2. 
   
3. 
   
4.