Class 11th

Correct order of van der Waals constant b of given gases is

Maximum number of electrons present in p subshell is

Packing fraction of body centred cubic structure is         

The species which does not exist is

Which among the following species is pyramidal in shape?

K_p for the given reaction is (36 * 10^–2atm^–1) Find out K_c (M^–1) (nearest integer).

(2NO₂ N₂O₄)

(R=0.0821 atm. L/mol. K)

(T = 300K)

A ball is projected from ground at angle q with the horizontal. After t = 1 s, it is moving at 45° with the horizontal and after t = 2 second, it is moving horizontally. What is speed of projection of ball? [g = 10 m s^–2]

 

How many of the following species have bond order = 1 and are paramagnetic as well?

$H{e}_2^{2+};O_2^{2-};N{e}_2^{2+};F_2;B_2;H_2;O_2^{2+}$

How many of the following compounds have one lone pair in central atom?

ClF₃, XeO₃, BrF₅, XeF₄, O₃, NH₃

A ball is projected vertically up with an initial velocity. Which of the following graph represent KE of ball?