Match the following? Species Conjugate acid ( a ) NH 3 ( i ) H 2 CO 3 ( b ) HCO 3 - ( ii ) H 3 O + ( c ) H 2 O ( iii ) NH 4 + ( d ) HSO 4 - ( iv ) H 2 SO 4

( a → iii ),( b → i ),( c → ii ),( d → iv )

( a → i ),( b → iii ),( c → ii ),( d → iv )

( a → iii ),( b → ii ),( c → i ),( d → iv )

( a → iii ) , ( b → ii ) , ( c → iv ) , ( d → i )

MEDIUM

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Three reactions involving $H_{2} {PO}_{4}^{-}$ are given below :
(i) $H_{3} {PO}_{4} + H_{2} O \to H_{3} O^{+} + H_{2} {PO}_{4}^{-}$

(ii) $H_{2} {PO}_{4}^{-} + H_{2} O \to {HPO}_{4}^{2 -} + H_{3} O^{+}$

(iii) $H_{2} {PO}_{4}^{-} + {OH}^{-} \to H_{3} {PO}_{4} + O^{2 -}$
In which of the above does $H_{2} {PO}_{4}^{-}$ act as an acid?

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Important Questions on Equilibrium

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Which of the following is the strongest base?

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

In the reaction $B (OH)_{3} + 2 H_{2} O ⟶ {[B (OH)_{4}]}^{-} + H_{3} O$

$B (OH)_{3}$ functions as

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

{BF}_{3}

is an acid, according to

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

What kind of a molecule

{AlCl}_{3}

is ?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

For standardizing

NaOH

solution, which of the following is used as a primary standard?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Match the reactants in List-I with the products in List-II.

	List - I		List - II
(a)	$H_{2} O + H_{2} S$	(i)	$(H_{3} O^{+}, {HS}^{-})$
(b)	$H_{2} O + N^{3 -}$	(ii)	$({NH}_{3}, {OH}^{-})$
(c)	$H_{2} O + {SiCl}_{4}$	(iii)	$({OH}^{-}, H_{3} S^{+})$
(d)	$H_{2} O + F_{2}$	(iv)	$({SiO}_{2}, HCl)$
		(v)	$({SiO}_{4}^{4}, {Cl}_{2})$
		(vi)	$(O_{2}, F^{-})$
		(vii)	$(HF, {OH}^{-})$
		(viii)	$({OH}^{-}, {HN}_{3})$

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be:

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Hard acids prefer to combine with

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Conjugate base for Bronsted acids

H_{2} O

and

HF

are:

HARD

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

In an acid-base titration,

0.1 M H C l

solution was added to the

N a O H

solution of unknown strength. Which of the following correctly shown the change of

p H

of the titration mixture in this experiment?
Question Image

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Acidity of

{BF}_{3}

can be explained on which of the following concepts?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Which of the following are Lewis acids?

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Which of the following compound CANNOT act as a Lewis base?

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

The conjugate base of

{NH}_{3}

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

The exact volumes of

1 M NaOH

solution required to neutralise

50 mL

1 M H_{3} {PO}_{3}

solution and

100 mL

2 M H_{3} {PO}_{2}

solution, respectively, are :

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

The correct decreasing order of the basic strength is

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

Match the following?

Species	Conjugate acid
$(a) {NH}_{3}$	$(i) H_{2} {CO}_{3}$
$(b) {HCO}_{3}^{-}$	$(ii) H_{3} O^{+}$
$(c) H_{2} O$	$(iii) {NH}_{4}^{+}$
$(d) {HSO}_{4}^{-}$	$(iv) H_{2} {SO}_{4}$

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

The strength of an aqueous

N a O H

solution is most accurately determined by titrating: (Note: consider that an appropriate indicator is used)

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

The conjugate bases of Bronsted acids

H_{2} O and HCl

are respectively:

EASY

Chemistry>Physical Chemistry>Equilibrium>Acids, Bases and Salts

In the following reactions,

ZnO

is respectively acting as a/an,

(i)

ZnO + {Na}_{2} O \to {Na}_{2} {ZnO}_{2}

(ii)

ZnO + {CO}_{2} \to {ZnCO}_{3}

Three reactions involving H2PO4- are given below : (i) H3PO4 +H2O → H3O+ + H2PO4- (ii) H2PO4- +H2O → HPO42- +H3O+ (iii) H2PO4- +OH- → H3PO4 + O2- In which of the above does H2PO4- act as an acid?

Important Questions on Equilibrium

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