Which of the following acids is the weakest?

H F (K_{A} = 6.8 \times 10^{- 4})

No worries! We‘ve got your back. Try BYJU‘S free classes today!

H_{3} P O_{4} (K_{A} = 7.5 \times 10^{- 3})

No worries! We‘ve got your back. Try BYJU‘S free classes today!

H N O_{2} (K_{A} = 4 \times 10^{- 4})

No worries! We‘ve got your back. Try BYJU‘S free classes today!

H_{2} S (K_{A} = 1.1 \times 10^{- 7})

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $H_{2} S (K_{A} = 1.1 \times 10^{- 7})$
A stronger acid has high value of $K_{a}$ . Hence less the value of $K_{a}$ , more weaker is acid.
From the given options, $H_{2} S$ has the least $K_{a}$ value equal to $1.1 \times 10^{- 7}$ . Hence it is the weakest acid.

Suggest Corrections

Similar questions

Q. The dissociation consists of acids

H A, H B, H C

and

H D

are

2.6 \times 10^{- 3}, 5.3 \times 10^{- 9}, 1.1 \times 10^{- 2}

and

7.5 \times 10^{- 5}

respectively. The weakest acid amongst these acids is:

Q. The hydrogen ion concentration of 0.5M aqueous solution of

H F (K_{a} = 2 \times 10^{- 4})

is:

The $K_{s p}$ of $A g_{2} C r O_{4}$ is $1.1 \times 10^{- 12}$ at 298K. The solubility (in mol/L) of $A g_{2} C r O_{4}$ in 0.1M $A g N O_{3}$ solution is:

Q. The

K_{s p}

A g_{2} C r O_{4}

1.1 \times 10^{- 12}

at 298 K. The solubility (in mole / L) of

A g_{2} C r O_{4}

in a

0.1 M A g N O_{3}

solution is

Q. The

K_{s p} o f A g_{2} C r O_{4} i s 1.1 \times 10^{- 12} a t 298 K .

The solubility (in

m o l / L

) of

A g_{2} C r O_{4}

in a

0.1 M A g N O_{3}

solution is

Join BYJU'S Learning Program

Which of the following acids is the weakest?

The correct option is D H2S (KA=1.1×10−7)A stronger acid has high value of Ka. Hence less the value of Ka, more weaker is acid.From the given options, H2S has the least Ka value equal to 1.1×10−7. Hence it is the weakest acid.

The correct option is D $H_{2} S (K_{A} = 1.1 \times 10^{- 7})$
A stronger acid has high value of $K_{a}$ . Hence less the value of $K_{a}$ , more weaker is acid.
From the given options, $H_{2} S$ has the least $K_{a}$ value equal to $1.1 \times 10^{- 7}$ . Hence it is the weakest acid.