Nucleophile

Q. The correct order of increasing acid strength of the given compounds is:
1. $C{H}_{3}COOH$ 2. $MeOC{H}_{2}COOH$
3. $C{F}_{3}COOH$ 4. $(Me{)}_{2}CHCOOH$

1. 2 < 4 < 1 < 3
2. 4 < 1 < 2 < 3
3. 4 < 1 < 3 < 2
4. 1 < 4 < 3 < 2

Q. A sample of $CuS{O}_4.5H_{2}O$ having 40 % purity by moles undergoes the following sequence of reactions in a flask having large amounts of $KCN$.
$CuS{O}_4.5H_{2}O\to CuS{O}_4+5H_{2}O\text{(Yield = 100\%)}$
$CuS{O}_4+2KCN\to Cu(CN{)}_2+K_{2}S{O}_4\text{(Yield = 80\%)}$
$2Cu(CN{)}_2\to 2CuCN+(CN{)}_2\text{(Yield = 60\%)}$
$2CuCN+6KCN\to 2K_3\left[Cu\right(CN{)}_4]\text{(Yield = 50\%)}$
Find the moles of impure $CuS{O}_4.5H_{2}O$ required for producing 28.45 g of the complex.
(Molar mass of Cu = 63.5 g/mol; molar mass of K = 39 g/mol)

1. 1.15 mol
2. 1.04 mol
3. 4.12 mol
4. 3.36 mol

Q. Which H atom in the following ester is most acidic?
$\stackrel{1}{C}{H}_3-\stackrel{1}{C}{H}_2-\stackrel{\stackrel{O}{||}}{C}-\stackrel{3}{C}{H}_2-\stackrel{\stackrel{O}{||}}{C}-O-C{\stackrel{4}{H}}_2\stackrel{5}{C}{H}_3$

1. 1
2. 2
3. 3
4. 4

Q.

Which of the following is not correct?

$OrderofbasicityOrderofnucleophilicity\left(a\right)F^{-}>C{l}^{-}>B{r}^{-}B{r}_{-}>C{l}^{-}>F^{-}\left(b\right)H-O-O^{-}>O{H}^{-}H-O-O^{-}>O{H}^{-}\left(c\right)C{H}_3>N{H}_2^{-}>OH-C{H}_3>N{H}_2^{-}>O{H}^{-}\left(d\right)H_{2}O>H_{2}S{H}_{2}O<H_{2}S$

1. $F^{-}>C{l}^{-}>B{r}^{-}B{r}_{-}>C{l}^{-}>F^{-}$

2. $H-O-O^{-}>O{H}^{-}H-O-O^{-}>O{H}^{-}$
   

3. $C{H}_3>N{H}_2^{-}>OH-C{H}_3>N{H}_2^{-}>O{H}^{-}$
   

4. $H_{2}O>H_{2}S{H}_{2}O<H_{2}S$
   

Q.

Which of the following is/are ambident nucleophiles?

1. ${}^{-}C\equiv N$

2. $N{O}_2^{-}$

3. $PC{l}_5$

4. $SnC{l}_4$

Q. Decreasing order of relative nucleophilicity of the following nucleophiles in protic solvent is -
$\stackrel{\ominus }{S}H,AC\stackrel{\ominus }{O},Ph\stackrel{\ominus }{O},\stackrel{\ominus }{O}H,H_{2}O$

1. $\stackrel{\ominus }{S}H>\stackrel{\ominus }{O}H>H_{2}O>AC\stackrel{\ominus }{O}>Ph\stackrel{\ominus }{O}$
2. $\stackrel{\ominus }{S}H>\stackrel{\ominus }{O}H>Ph\stackrel{\ominus }{O}>AC\stackrel{\ominus }{O}>H_{2}O$
3. $\stackrel{\ominus }{S}H>Ph\stackrel{\ominus }{O}>\stackrel{\ominus }{O}H>H_{2}O>AC\stackrel{\ominus }{O}$
4. $\stackrel{\ominus }{O}H>\stackrel{\ominus }{S}H>Ph\stackrel{\ominus }{O}>AC\stackrel{\ominus }{O}>H_{2}O$

Q.

The correct order of nucleophilicity among the following is :

1. I > II > III > IV

2. IV > III > II > I

3. II > III > I > IV

4. III > II > I > IV