NEET 2023 Manipur | Redox Reactions Question 3 | Chemistry

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NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

The correct option for a redox couple is:

Both are oxidised forms involving same element.

Both are reduced forms involving same element.

Both the reduced and oxidised forms involve same element.

Cathode and anode together.

NEET 2023

MCQ (Single Correct Answer)

-1

On balancing the given redox reaction,

$$\mathrm{aCr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{bSO}_{3}^{2-}(\mathrm{aq})+\mathrm{cH}^{+}(\mathrm{aq}) \rightarrow 2 \mathrm{aCr}^{3+}(\mathrm{aq})+\mathrm{bSO}_{4}^{2-}(\mathrm{aq})+\frac{\mathrm{c}}{2} \mathrm{H}_{2} \mathrm{O}(\ell)$$

the coefficients $$\mathrm{a}, \mathrm{b}$$ and $$\mathrm{c}$$ are found to be, respectively -

3, 8, 1

1, 8, 3

8, 1, 3

1, 3, 8

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

Which of the following reactions is a decomposition redox reaction?

P₄(s) + 3OH^$$-$$(aq) + 3H₂O(l) $$\to$$ PH₃(g) + 3H₂PO$$_2^ - $$(aq)

2Pb(NO₃)₂(s) $$\to$$ 2PbO(s) + 4NO₂(g) + O₂(g)

N₂(g) + O₂(g) $$\to$$ 2NO(g)

Cl₂(g) + 2OH^$$-$$(aq) $$\to$$ ClO^$$-$$(aq) + Cl^$$-$$(aq) + 4H₂O(l)

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

What is the change in oxidation number of carbon in the following reaction?
CH₄(g) + 4Cl₂(g) $$ \to $$ CCl₄(l) + 4HCl(g)

0 to + 4

$$ - $$4 to + 4

0 to $$ - $$ 4

+ 4 to + 4

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