2020 MHT-CET PCB SET - 02 — MHT - CET STD 12 Science — Question

During the development of the embryo sac, a mega pore mother cell undergoes ______ meiosis and mitosis respectively.

The primitive reducing atmosphere of the earth was slowly converted to the oxidizing atmosphere due to the development of ______

The force of attraction between any two nonpolar molecules is ____________.

What is a common name of the compound 1-Chloro-2, 2-dimethylpropane?

Ebullioscopic constant depends on ____________.

If the length and diameter of a wire are decreased, then for the same tension the natural frequency of stretched wire will ______.

All of the following are true for human brain, EXCEPT ______.

A random variable X has the following probability distribution:

X = x	–1	0	1	2	3	4
P(X = x)	0.25	2k	0.1	k	0.15	2k

Then, the expected value of X is ______.

A particle of mass 'm' is rotating in a horizontal circle of radius 'r' with unifom1 velocity `vec"V"`. The change in its momentum at two diametrically opposite points will be ______.