Question : Which of the following helps keep the Earth's atmosphere in place?

Option 1: The gravitational force of the moon

Option 2: Rotation of the Earth on its axis

Option 3: The gravitational force of the Earth

Option 4: The gravitational force of the Sun

Question : The Sun heats the Earth through:

Option 1: conduction

Option 2: radiation

Option 3: fission

Option 4: convention

Question : Rupu’s income is 20% more than Madhu’s income. Madhu’s income is less than Rupu’s income by:

Option 1: $17 \frac{2}{3} \%$

Option 2: 20%

Option 3: $18 \frac{2}{3} \%$

Option 4: $16 \frac{2}{3} \%$

Question : If 30% of Ravi’s income is equal to 40% of Suresh’s income, then 50% of Ravi’s income is equal to what percentage of Suresh’s income?

Option 1: $66 \frac{1}{3} \%$

Option 2: $33\frac{1}{3} \%$

Option 3: $33 \frac{2}{3} \%$

Option 4: $66 \frac{2}{3} \%$

Question : ______ states that for a solution of volatile liquids, the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution.

Option 1: Dalton’s law

Option 2: Raoult’s law

Option 3: Faraday’s law

Option 4: Boyle’s law