Q. At room temperature the average speed of Helium is higher than that of oxygen by a factor of:

1. $2\sqrt{2}$
2. $6/\sqrt{2}$
3. $8$
4. $6$

Q. The number of $C-C$ sigma bonds in the compound is:

1. $18$
2. $16$
3. $17$
4. $11$

Q. The $pH$ of $0.1$M aqueous solutions of $NaCl$, $C{H}_{3}COONa$ and $N{H}_{4}Cl$ will follow the order:

1. $N{H}_{4}Cl<C{H}_{3}COONa<NaCl$
2. $NaCl<C{H}_{3}COONa<N{H}_{4}Cl$
3. $N{H}_{4}Cl<NaCl<C{H}_{3}COONa$
4. $NaCl<N{H}_{4}Cl<C{H}_{3}COONa$

Q. The numbers of lone pairs and bond pairs in hydrazine are, respectively.

1. $2$ and $5$
2. $2$ and $4$
3. $1$ and $5$
4. $2$ and $6$

Q. The species that exhibits the highest $R_f$ value in a thin layer chromatogram using a non polar solvent on a silica gel plate is$?$

1. 
   
2. 
   
3. 
   
4. 
   

Q. Among the compounds $I-IV$, the compound having the lowest boiling point is:

1. $I$
2. $II$
3. $III$
4. $IV$

Q. The number of isomers which are ethers and having the molecular formula $C_4{H}_{10}O$ is:

1. $2$
2. $4$
3. $5$
4. $3$

Q. The volume of oxygen at STP required to burn $2.4$ g of carbon completely is:

1. $1.12$ L
2. $2.24$ L
3. $8.96$ L
4. $4.48$ L

Q.

1. (i)
2. (ii)
3. (iii)
4. (iv)

Q. The diamagnetic species is:

1. $N{O}_2$
2. $C{O}_2$
3. $NO$
4. $O_2$

Q. The isoelectronic pair is:

1. $O_{,}NO$
2. $CO,N_2$
3. $HF,HCl$
4. $C_2,HF$

Q. The major product of the reaction of $2$-butene with alkaline $KMn{O}_4$ solution is:

1. 
   
2. 
   
3. 
   
4. 
   

Q. If the radius of the hydrogen atom is $53$ pm, the radius of the $H{e}^{+}$ ion is closest to:

1. $81$ pm
2. $108$ pm
3. $13$ pm
4. $27$ pm

Q. Ammonia is not produced in the reaction of:

1. $N{H}_{4}Cl$ and $KOH$
2. $AlN$ with water
3. $N{H}_{4}Cl$ with $Ca(OH{)}_2$
4. $N{H}_{4}Cl$ with $NaN{O}_2$

Q. The first ionization inthalpies for three elements are $1314,1680$ and $2080$ $kJmo{l}^{-1}$, respectively. The correct sequence of the elements is:

1. $O,F$ and $Ne$
2. $F,O$ and $Ne$
3. $Ne,F$ and $O$
4. $F,Ne$ and $O$