HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

Classify the following ligand based on the number of donor atoms.

pyridine

What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?

On the basis of VB theory explain the nature of bonding in \[\ce{[Co(C2O4)3]^3-}\].

Graphite and diamond are ____________.

An ionic compound A_xB_y crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube. the correct formula of A_xB_y is

Solid CO₂ is an example of ____________.

Assertion: monoclinic sulphur is an example of a monoclinic crystal system

Reason: for a monoclinic system, a ≠ b ≠ c and α = γ = 90°, β ≠ 90°

In calcium fluoride, having the flurite structure the coordination number of Ca²⁺ ion and F⁻ Ion are ____________.

The ionic radii of A⁺ and B⁻ are 0.98 × 10⁻¹⁰ m and 1.81 × 10⁻¹⁰ m. The coordination number of each ion in AB is ______.

Define unit cell.

Give any three characteristics of ionic crystals.

Classify the following solid.

P₄

Classify the following solid.

Brass

Classify the following solid.

Diamond

Classify the following solid.

NaCl

Classify the following solid.

Iodine

If NaCl is doped with 10⁻² mol percentage of strontium chloride, what is the concentration of cation vacancy?

For a first-order reaction \[\ce{A -> B}\] the rate constant is x min⁻¹. If the initial concentration of A is 0.01 M, the concentration of A after one hour is given by the expression.

A zero-order reaction \[\ce{X -> Product}\], with an initial concentration 0.02 M has a half-life of 10 min. if one starts with concentration 0.04 M, then the half-life is

For a first order reaction \[\ce{A ->Product}\] with initial concentration x mol L⁻¹, has a half life period of 2.5 hours. For the same reaction with initial concentration `("x"/2)` mol L⁻¹ the half life is