Ncert Solutions Chemistry Class 12th

In weakly alkaline solution, MnO₄– changes to –

Correct match is :

If ionisation energy of an element is as follows :

X → X⁺ + 1e^–; 1E₁ = x kJ/mol

X⁺ → X²⁺ + 1e^– ; 1E₂ = 1.5 x kJ/mol

X²⁺ → X³⁺ + 1e^– ; IE₃ = 15x kJ/mol

This   element   may   have    the    electronic configuration :-

The angular frequency of a simple pendulum is w rad/s. Now the length is made one fourth of the original length, the angular frequency becomes

To measure light intensity we use

Rainbow is formed due to

A defective eye cannot see close objects clearly because their image is formed

Kindly consider the following 

A plane electromagnetic wave EZ = 100 cos (6 * 10⁸ t + 4x) V/m, where x is in metre and t is in second. propagates in medium, what is refractive index of the medium?

The resistance of a silicon junction diode, whose V - I characteristics is as shown in figure is (V_k = 0.7 V)