Bronsted Lowry Theory

Q. Which one of the following can act as Bronsted acid as well as Bronsted base?

1. $C{O}_3^{2-}$
2. $HPO{4}^{2-}$
3. $C{H}_{3}CO{O}^{-}$
4. $S{O}_4^{2-}$

Q. Conjugate base for Bronsted acids $H_{2}O$ and $HF$ are :

1. $O{H}^{-}$ and $H_2{F}^{+}$, respectively
2. $H_3{O}^{+}$ and $F^{-}$, respectively
3. $O{H}^{-}$ and $F^{-}$, respectively
4. $H_3{O}^{+}$ and $H_2{F}^{+}$, respectively

Q. Whic of the following can act as both a bronsted Acid and base ?

1. $O_2^{+}$​
2. $HCl$
3. $N{a}_{2}C{O}_3$
4. $HSO{4}^{-}$

Q. Identify Bronsted-Lowry acids in the reaction given.
$\underset{\left(A\right)}{\left[Al\right(H_{2}O{)}_6{]}^{3+}}+\underset{\left(B\right)}{HC{O}_3^{-}}\rightleftharpoons \underset{\left(C\right)}{\left[Al\right(H_{2}O{)}_5\left(O{H}^{-}\right){]}^{2+}}+\underset{\left(D\right)}{H_{2}C{O}_3}$
The correct answer is:

1. A, C
2. A, D
3. B, C
4. B, D

Q. Aqueous solution of which of the following compounds is the best conductor of electric current?

1. Hydrochloric acid, $HCl$
2. Ammonia, $N{H}_3$
3. Fructose, $C_{6}H12O_6$
4. Acetic acid, $C_2{H}_4{O}_2$

Q. The concept that acid is proton donor and base is proton acceptor was given by:

1. Arrhenius
2. Lowry-Bronsted
3. Lewis
4. Faraday

Q. $N{H}_{4}Cl+NaN{H}_2\to 2{\mathrm{NH}}_3+\mathrm{NaCl}$
In the above reaction, ${{\mathrm{NH}}_4}^{+}$ acts as a Bronsted acid.

1. True
2. False

Q. According to Bronsted-Lowry concept, the relative strengths of the bases $C{H}_{3}CO{O}^{-}$, $O{H}^{-}$ and $C{l}^{-}$ are in the order:

1. $O{H}^{-}>C{H}_{3}CO{O}^{-}>C{l}^{-}$
2. $C{l}^{-}>O{H}^{-}>C{H}_{3}CO{O}^{-}$
3. $C{H}_{3}CO{O}^{-}>O{H}^{-}>C{l}^{-}$
4. $O{H}^{-}>C{l}^{-}>C{H}_{3}CO{O}^{-}$

Q. Which of the following cannot act as Bronsted-Lowry base?

1. $O{H}^{-}$
2. $N{H}_4^{+}$
3. $S{H}^{-}$
4. All three act as a Bronsted-Lowry base

Q.

Which of the following can act both as Bronsted acid and Bronsted base

1. $C{l}^{-}$

2. $HC{O}_3^{-}$

3. $H_3{O}^{+}$

4. $O{H}^{-}$

Q. In the following reaction $\left[Cu\right(H_{2}O{)}_4{]}^{2+}\left(aq\right)+HC{O}_3^{-}\left(aq\right)\rightleftharpoons \left[Cu\right(H_{2}O{)}_{4}O{H}^{-}{]}^{+}\left(aq\right)+H_{2}C{O}_3\left(aq\right)$
species behaving as a bronsted- lowry acid are:

1. $\left[Cu\right(H_{2}O{)}_4{]}^{2+},HC{O}_3^{-}$
2. $HC{O}_3^{-},\left[Cu\right(H_{2}O{)}_{4}O{H}^{-}{]}^{+}$
3. $\left[Cu\right(H_{2}O{)}_4{]}^{2+},H_{2}C{O}_3$
4. $[HC{O}_3^{-},H_{2}C{O}_3$

Q. Four species are listed below.
$\left(i\right)HC{O}_3^{-}$
$\left(ii\right)H_3{O}^{+}$
$\left(iii\right)HS{O}_4^{-}$
$\left(iv\right)HS{O}_{3}F$
Which one of the following is the correct sequence of their acid strength?

1. $\left(iii\right)<\left(i\right)<\left(iv\right)<\left(ii\right)$
2. $\left(iv\right)<\left(ii\right)<\left(iii\right)<\left(i\right)$
3. $\left(ii\right)<\left(iii\right)<\left(i\right)<\left(iv\right)$
4. $\left(i\right)<\left(iii\right)<\left(ii\right)<\left(iv\right)$