CUET Level - I NEET Mock Test - 7 (Chemistry)

Which of the following is not a redox reaction?

• Burning of candle

• Dissolving salt in water

• Dissolving Zinc in dil. H₂SO₄

• Rusting of iron

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Redox reaction

The oxidation number of Cr in Cr(CO)₆ is —————–

• 0

• +2

• -2

• +6

Tags

Atom and molecules

Which of the following is not a redox reaction?

• CaCO₃ → CaO + CO₂

• O₂ + 2H₂ → 2H₂O

• Na + H₂O → NaOH + 1/2H₂

• MnCl₃ → MnCl₂ + 1/2 Cl₂

Tags

Redox reaction

In the reaction

3Br₂ + 6CO₃^2- + 3H₂O → 5Br ^– + BrO₃^– + 6HCO₃^–

• Bromine is oxidised and carbonate is reduced.

• Bromine is reduced and water is oxidised.

• Bromine is neither reduced nor oxidised.

• Bromine is both reduced and oxidised.

The most powerful oxidising agent among the following is:

• H₂SO₄

• H₃BO₃

• HPO₃

• H₃PO₄

Tags

Redox reaction

oxidation number of Cl in Cl₂O₇ is

• +7

• +5

• +3

• -7

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Redox reaction

The number of moles of KMnO₄ reduced by one mole of KI in an alkaline medium is

• One

• Two

• Five

• One - fifth

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Redox reaction

In the reaction of formation of magnesium oxide magnesium undergoes ________

• reduction

• oxidation

• hydrogenation

• decomposition

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Redox reaction

Removal of oxygen from a compound is an example of ________

• oxidation

• oxygenation

• dehydrogenation

• reduction

Tags

Redox reaction

Reduction involves in __________ oxidation number.

• decrease

• increase

• independence

• remain constant

Tags

Redox reaction