CBSE Class 11 Chemistry Questionbank

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16 of 16

Question 1 · 16 total

easy+1

One mole of any substance contains:

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Question 2 · 16 total

medium+1

How many moles are present in 4 g of helium? (Molar mass of He = 4 g/mol)

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Question 3 · 16 total

medium+1

The maximum number of electrons that the shell with $n = 3$ can hold is:

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Question 4 · 16 total

easy+1

Across a period from left to right, atomic radius generally decreases because:

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Question 5 · 16 total

medium+1

The shape of the $NH_3$ molecule is:

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Question 6 · 16 total

hard+1

The bond order of the superoxide ion $O_2^-$ is:

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Question 7 · 16 total

medium+1

For an exothermic reaction at constant pressure:

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Question 8 · 16 total

medium+1

Find the pH of a $0.01$ M solution of $HCl$ (a strong acid).

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Question 9 · 16 total

medium+1

The oxidation number of Mn in $KMnO_4$ is:

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Question 10 · 16 total

medium+1

Assertion: Noble gases have the highest ionization enthalpy in their respective periods.

Reason: Noble gases possess stable closed-shell electronic configurations.

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Question 11 · 16 total

medium+1

Which of the following behaves as an electrophile?

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Question 12 · 16 total

hard+1

Which carbocation is the most stable?

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Question 13 · 16 total

medium+1

Addition of HBr to propene gives predominantly:

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Question 14 · 16 total

hard+1

Naphthalene is aromatic because it contains:

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Question 15 · 16 total

easy+1

Find the molar mass (in g/mol) of carbon dioxide, $CO_2$ . [C = 12, O = 16]

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Question 16 · 16 total

medium+1

Which non-metal is a liquid at room temperature?

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