1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

$$K_a$$ values for acids $$\mathrm{H}_2 \mathrm{SO}_3, \mathrm{HNO}_2, \mathrm{CH}_3 \mathrm{COOH}$$ and $$\mathrm{HCN}$$ are respectively $$13 \times 10^{-2}, 4 \times 10^{-4}, 1.8 \times 10^{-5}$$ and $$4 \times 10^{-10}$$, which of the above acids produces stronger conjugate base in aqueous solution?

A
$$\mathrm{H}_2 \mathrm{SO}_3$$
B
$$\mathrm{HNO}_2$$
C
$$\mathrm{CH}_3 \mathrm{COOH}$$
D
$$\mathrm{HCN}$$
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0

The conjugate base of $$\mathrm{NH}_3$$ is

A
$$\mathrm{NH}_4^{+}$$
B
$$\mathrm{NH}_4 \mathrm{OH}$$
C
$$\mathrm{NH}_2 \mathrm{OH}$$
D
$$\mathrm{NH}_2^{-}$$
3
KCET 2019
MCQ (Single Correct Answer)
+1
-0

In the reaction

$$\mathrm{B}(\mathrm{OH})_3+2 \mathrm{H}_2 \mathrm{O} \rightarrow\left[B(\mathrm{OH})_4\right]^{-}+\mathrm{H}_2 \stackrel{+}{\mathrm{O}}, \mathrm{B}(\mathrm{OH})_3$$

functions as

A
Protonic acid
B
Lewis base
C
Bronsted acid
D
Lewis acid
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Solubility of AgCl is least in

A
0.1 M NaCl
B
pure water
C
0.1 M BaCl$$_2$$
D
0.1 M AlCl$$_3$$
KCET Subjects
EXAM MAP