CBSE 12 Chemistry Question Paper-2025 Set-4

The role of a catalyst is to change :

Which of the following molecules is chiral in nature ?

CH₃CH₂OH can be converted to CH₃CHO by:

The IUPAC name of the compound CH₃-CH₂-N(CH₃)-CH₂-CH₂-CH₃ is:

While doing qualitative analysis in chemistry lab, Abhishek added yellow coloured potassium chromate solution into a test tube. He was surprised to see the colour of the solution changing immediately to orange. He realised that the test tube was not clean and contained a few drops of some liquid. Which of the following substances will be the most likely liquid to be present in the test tube before adding potassium chromate solution?

CH₃CH₂CHO and CH₃CH₂COOH can be distinguished by:

Which of the following complexes is homoleptic?

A compound formed by the interaction of an aryl diazonium salt and phenol is an example of:

The IUPAC name of the compound (CH₃)₃C-CH₂CH₃ is:

The boiling points of aldehydes and ketones are higher than hydrocarbons and ethers of comparable molecular masses due to:

Which of the following is not a natural polymer?

Which of the following is an example of a biodegradable polymer?

Which of the following will not undergo Friedel-Crafts reaction?

Which of the following is an example of a condensation polymer?

For a chemical reaction, the rate constant is given by the expression, k = A e⁻ᴱᵃ/RT The rate of the reaction increases as:

Rate of reaction can be expressed in terms of change in concentration of reactant or product with time. Which of the following represents the rate of reaction for the given reaction? 2N₂O₅(g) → 4NO₂(g) + O₂(g)

The IUPAC name of the compound CH₃CH₂CH(CH₃)CH₂CH₃ is:

The IUPAC name of the compound CH₃-O-CH₂CH₃ is:

Which of the following complexes is an inner orbital complex and is paramagnetic in nature?

The IUPAC name of the complex K₃[Cr(C₂O₄)₃] is:

The concentration of a reactant 'R' in a zero order reaction becomes half of its initial concentration after 100 s. The rate constant of the reaction is:

The charge required for the reduction of 1 mol of MnO₄⁻ to MnO₂ is:

A compound with molecular formula C₄H₁₁N gives a foul-smelling product on reaction with chloroform and ethanolic KOH. The compound is a:

Which of the following is not a natural polymer?