CBSE 12 Chemistry Question Paper-2023 Set-1

Which of the following elements is a metalloid?

The rate of a first order reaction is 2.0 × 10⁻³ mol L⁻¹ s⁻¹ at a concentration of 0.2 mol L⁻¹. The half-life of the reaction is:

The activation energy of a reaction is zero. The rate constant (k) for such a reaction is:

The coordination number of Cr in [Cr(NH₃)₆]³⁺ is:

The major product formed in the reaction of 1-propanol with HCl in the presence of anhydrous ZnCl₂ is:

Which of the following amino acid has a phenolic side chain?

The rate of a reaction gets doubled when the temperature is increased from 298 K to 308 K. The activation energy of the reaction is: (Given R = 8.314 JK⁻¹ mol⁻¹, log 2 = 0.3010)

An elementary reaction has a rate law: Rate = k[A][B]. If the concentration of A is increased four times and the concentration of B is doubled, the rate of the reaction will become:

Which of the following is not a biodegradable polymer?

Which of the following compounds has the highest boiling point?

Which of the following ions is colorless? (Atomic No.: Ti = 22, V=23, Cr = 24, Cu = 29, Sc = 21)

Which of the following ions is colorless in water? (Atomic No.: Mn=25, Co=27, Zn=30, Fe=26, Ni=28)

Which of the following ligands is a dentate ligand?

The reason for the formation of interstitial compounds by transition metals is:

Which transition element has a maximum oxidation state of +7?

The metal present in Vitamin B₁₂ is:

Which of the following factors is responsible for the colored compounds of transition metals?

The common oxidation state shown by lanthanoids is: