Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 2

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

Write balanced net ionic equations for the following reactions in acidic solution:

(a) $S_{4} O_{6}^{2 -} (aq) + Al (s) ⟶ H_{2} S (aq) + {Al}^{3 +} (aq)$
(b) $S_{2} O_{3}^{2 -} (aq) + {Cr}_{2} O_{7}^{2 -} (aq) ⟶ S_{4} O_{6}^{2 -} (aq) + {Cr}^{3 +} (aq)$

(c) ${ClO}_{3}^{-} (aq) + {As}_{2} S_{3} (s) ⟶ {Cl}^{-} (aq) + H_{2} {AsO}_{4}^{-} (aq) + {HSO}_{4}^{-} (aq)$
(d) ${IO}_{3}^{-} (aq) + Re (s) ⟶ {ReO}_{4}^{- 1} (aq) + I^{-} (aq)$
(e) ${HSO}_{4}^{-} (aq) + {As}_{4} (s) + {Pb}_{3} O_{4} (s) ⟶ {PbSO}_{4} (s) + H_{2} {AsO}_{4}^{-} (aq)$
(f) ${HNO}_{2} (aq) ⟶ {NO}_{3}^{-} + NO (g)$

Important Questions on Redox Reactions

HARD

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 3

Write the balanced net ionic equations for the following reactions in basic solution:
(a)

C_{4} H_{4} O_{6}^{2 -} (aq) + {ClO}_{3}^{-} (aq) ⟶ {CO}_{3}^{2 -} (aq) + {Cl}^{-} (aq)

(b)

Al (s) + {BiONO}_{3} (s) \to Bi (s) + {NH}_{3} (aq) + {[Al (OH)_{4}]}^{-} (aq)

(c)

H_{2} O_{2} (aq) + {Cl}_{2} O_{7} (aq) \to {ClO}_{2}^{-} (aq) + O_{2} (g)

(d)

{Tl}_{2} O_{3} (s) + {NH}_{2} OH (aq) ⟶ TlOH (s) + N_{2} (g)

(e)

{[Cu {({NH}_{3})}_{4}]}^{2 +} (aq) + S_{2} O_{4}^{2 -} (aq) ⟶ {SO}_{3}^{2 -} (aq) + Cu (s) + {NH}_{3} (aq)

(f)

Mn (OH)_{2} (s) + {MnO}_{4}^{-} (aq) \to {MnO}_{2} (s)

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 4

The oxidation number of oxygen in

{Na}_{2} O_{2}

is _____ .

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 5

The oxidation number of phosphorus in

{Mg}_{2} P_{2} O_{7}

is

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 6

The oxidation states of Sulphur in the anions

{SO}_{3}^{2 -}, S_{2} O_{4}^{2 -}

and

S_{2} O_{6}^{2 -}

follows the order?

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 7

Match List-I (Compounds) with List-II (Oxidation states of Nitrogen) and select answer using the codes given below the lists:

	List-I		List-II
(a)	${NH}_{3}$	(1)	$+ 5$
(b)	$N_{2} H_{2}$	(2)	$+ 2$
(c)	$NO$	(3)	$- 3$
(d)	$N_{2} O_{5}$	(4)	$- 1$

(Code):

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 8

One mole of

N_{2} H_{4}

looses ten moles of electrons to form a new compound

Y

. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in

Y

? (there is no change in the oxidation state of hydrogen)

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 9

The average oxidation state of

Fe

in

{Fe}_{3} O_{4}

is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-1>Q 10

In the reaction

xHI + {yHNO}_{3} ⟶ NO + I_{2} + H_{2} O,

upon balancing with the whole number, the coefficients are