A weak acid is 0.1 % ionised in 0.1 , M solution. Its pH is - Vidyadip

MCQ

A weak acid is $ 0.1\% $ ionised in $0.1\, M $ solution. Its $pH$ is

A
$2$
B
$3$
✓
$4$
D
$1$

✓

Answer

Correct option: C.

$4$

(c) For a monobasic acid

$[{H^ + }] = C\alpha $

$ = \frac{1}{{10}} \times 0.001 = {10^{ - 4}}$ $⇒ pH = 4$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

$HC \equiv CNa + Cl - CH_2 - CH_2 - CH_2 - I \to (A)$; Major product $(A)$ is

Hofmann's hypobromite reaction affords a method of

Aqueous solutions of two compounds $M_1 -O -H$ and $M_2 -O -H$ are prepared in two different beakers. If, the electronegativity of $M_1$ = $3.4$, $M_2$ = $1.2$, $O$ = $3.5$ and $H$ = $2.1$, then the nature of two solutions will be respectively

$4.5 \,g$ of compound $A ( MW =90)$ was used to make $250\, mL$ of its aqueous solution. The molarity of the solution in $M$ is $x \times 10^{-1}$. The value of $x$ is ............ (Rounded off to the nearest integer)

Match the metal ions given in Column$- I$ with the spin magnetic moments of the ions given in Column$-II$ and assign the correct code

Column$-I$	Column$-II$
$(a)\;Co^{+3}$	$(i)\;\sqrt{8}\; B.M.$
$(b)\;Cr^{+3}$	$(ii)\;\sqrt{35}\; B.M.$
$(c)\;Fe^{+3}$	$(iii)\;\sqrt{3}\; B.M.$
$(d)\;Ni^{+2}$	$(iv)\;\sqrt{24}\; B.M.$
	$(v)\;\sqrt{15}\; B.M.$

$(a)\quad (b)\quad (c)\quad (d)$

Amongst the following ions, which one has the highest paramagnetism ?

Which of the following will not give Hoffmann bromamide reaction ?

Oxidation number of nitrogen in $NaN{O_2}$ is

$N{H_3}$ has a much higher boiling point than $P{H_3}$ because

$C{H_3}CH(OH).COOH$ shows