Questions

Both warmth and moisture reduce the density of air and hence its pressure is high.

A concentrated solution will contain the most solute molecules per solvent molecules.

Here in the given options,

1)  6/10 = 0.6

2) 20.5/50 = 0.41

3) 30/120 = 0.25

4) 2.6/2 = 1.3

Hence, option D) is most concentrated.

George Gamow. Gamow, who died in 1968, was a physicist, who published “Thirty Years that Shook Physics”.

‘To’ is always followed by the first form of the verb. So, the phrase ‘to taking part in’ needs to be replaced with ‘to take part in’. Thus, the correct formation would be, ‘He wanted my permission to take part in sports’.