Chemistry

Number of S-O-S bond in H₂S₂O₆ :-

Which of following is most Acidic in aqueous solution :-

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 :-

How many pπ–pπ and pπ–dπ bond present in SO₃(s):

Which of the following have one lone pair on the central atom ?

(I)  NH₃

(II)  SF₄

(III)   XeOF₄

(IV)   XeF₆

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

A body of mass M is rotating in a vertical circle of radius r with critical speed. The difference in its kinetic energy at the top and the bottom is

Two trains 101 m and 99 m in length are running in opposite direction with velocities 54 km/h and 36 km/h. In what time they will completely cross each other?

To measure light intensity we use

After one alpha particle emission and one b^– particle emission from a nucleus