Question : The marginal revenue of a monopolist is 

Option 1: more than price .

Option 2: equal to price .

Option 3: less than  price .

Option 4: less than marginal cost .

Question : While ascending a hill, the driver of the vehicle keeps the gear ratio:

Option 1: Equal to 1

Option 2: Less than 1

Option 3: Greater than 1

Option 4: Either equal to or greater than 1

Question : Two vessels of equal capacity contain juice and water in the ratio of 3 : 5 and 3 : 1 respectively. The mixture of both vessels is mixed and transferred into a bigger vessel. What is the ratio of juice and water in the new mixture?

Option 1: 13 : 9

Option 2: 9 : 7

Option 3: 8 : 9

Option 4: 7 : 3

Question : The value of $2 \frac{3}{5} \div\left[2 \frac{1}{3} \div\left\{4 \frac{1}{3}-\left(2 \frac{1}{2}+\frac{2}{3}\right)\right\}\right]$ is equal to:

Option 1: $1 \frac{3}{10}$

Option 2: $2 \frac{7}{10}$

Option 3: $2 \frac{3}{7}$

Option 4: $1 \frac{3}{7}$

Question : Which of the following statements is correct?

Option 1: Living organisms can survive a wide range of pH changes.

Option 2: When the pH of rainwater is less than 8.2, it is called acid rain.

Option 3: Our body works within the pH range of 7.0 to 7.8.

Option 4: Tooth decay starts when the pH of the mouth is lower than 1.5.