While demonstrating acid base reactions, MS. Prabha, a science teacher added sodium oxide to $HCl$ until it was in excess. Which of the following graphs correctly represents the change in $pH$ ?

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Important Questions on Acids, Bases and Salts

MEDIUM

10th Foundation

IMPORTANT

Aqueous solutions of salts are either acidic, basic or neutral. A few common salts are listed as:

I. Silver chloride

II. Ammonium sulphate

III. Sodium nitrate

IV. Sodium phosphate

V. Sodium acetate

Which of the following correctly matches the given salts with the nature of their aqueous solutions?

Brine solution

HARD

10th Foundation

IMPORTANT

Study the given flow chart carefully and fill in the blanks by choosing an appropriate option.

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	I	II	III	IV	V	VI
(A)	${NH}_{4} OH$	$NaOH$	$O_{2}$	${Na}_{2} O$	${Cl}_{2}$	$Ca {(OH)}_{2}$
(B)	${NH}_{4} Cl$	${NaHCO}_{3}$	$H_{2}$	${Cl}_{2}$	$NaOH$	${CaOCl}_{2}$
(C)	$NaOH$	${({NH}_{4})}_{2} {CO}_{3}$	$O_{2}$	${Na}_{2} O$	$H_{2}$	${CaCl}_{2}$
(D)	${NH}_{4} OH$	$NaOH$	$H_{2}$	$NaOH$	${Cl}_{2}$	$CaO$

MEDIUM

10th Foundation

IMPORTANT

Observe the given figure carefully, which represents the decomposition of brine solution by passing electricity.

Question Image