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.

The 2019 BRICS summit is the eleventh annual BRICS summit, an international relations conference attended by the heads of state or heads of government of the five-memberstates Brazil, Russia, India, China and South Africa. The summit will be held in Rio de Janeiro, Brazil, the third time Brazil has hosted the summit after the 2014 summit.

‘One of the assistant’ needs to be replaced with ‘one of the assistants’ to make the sentence grammatically and contextually correct. This is because, ‘One of’ is always followed by a plural noun.