CBSE 12 Chemistry Question Paper-2025 Set-3

The charge required for the reduction of 1 mol of $MnO_{4}^{-}$ to $MnO_{2}$ is

Which among the following is a false statement?

The number of molecules that react with each other in an elementary reaction is a measure of the:

The element having $[Ar]3d^{10}4s^{1}$ electronic configuration is

The complex ions $[Co(NH_{3}){5}(NO{2})]^{2+}$ and $[Co(NH_{3})_{5}(ONO)]^{2+}$ are called

The diamagnetic species is:

Assertion (A): Vitamin D cannot be stored in our body. Reason (R): Vitamin D is fat soluble vitamin and is not excreted from the body in urine.

Assertion (A): Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis. Reason (R): Aryl halides do not undergo nucleophilic substitution reactions with the anion formed from phthalimide.

Assertion (A): Cu cannot liberate $H_{2}$ when reacting with dilute mineral acids. Reason (R): Cu electrode potential is positive.

Assertion (A): In a first-order reaction, if the concentration of the reactant is doubled, its half-life also gets doubled. Reason (R): The half-life of a first-order reaction does not depend on the initial concentration of the reactant.

Which of the following does not form a stable hydrate on treatment with water?

The IUPAC name of the compound $CH_{3}CH(CH_{3})CH_{2}CHO$ is:

Schiff's reagent is used to distinguish between:

Which of the following has the highest boiling point?

The major product formed when toluene is treated with a mixture of concentrated $H_{2}SO_{4}$ and concentrated $HNO_{3}$ is:

A compound with molecular formula $C_{4}H_{11}N$ which gives a foul-smelling product on reaction with chloroform and ethanolic KOH is a:

For a first order reaction, if the concentration of the reactant is doubled, its half-life is also doubled.

The complex ions $[Co(NH_{3}){5}(NO{2})]^{2+}$ and $[Co(NH_{3})_{5}(ONO)]^{2+}$ are called

The charge required for the reduction of 1 mol of $MnO_{4}^{-}$ to $MnO_{2}$ is

Which among the following is a false statement?

The IUPAC name of the compound with the following structure: $CH_{3}CH(CH_{3})CH_{2}CHO$ is:

Which of the following does not form a stable hydrate on treatment with water?

Which of the following has the highest boiling point?

Schiff's reagent is used to distinguish between:

A compound with molecular formula $C_{4}H_{11}N$ which gives a foul-smelling product on reaction with chloroform and ethanolic KOH is a:

The major product formed when toluene is treated with a mixture of concentrated $H_{2}SO_{4}$ and concentrated $HNO_{3}$ is: