If 35% of 40% of 7/5 of a number is 490, then what is

Which of the following is a characteristic of  the acids?

Which of the following substances is used to disinfect drinking water in many places

Night blindness is caused by the deficiency of which vitamin?

Coffee, spinach, onion and tea in our diet mostly provide us with which of the following elements as food?

A fluid flows through a horizontal pipe. The pressure drops by 2000 Pa and speed increases from 2 m/s to 4 m/s. Find density.

Which among the following nutrients is essential for the normal functioning of the thyroid gland?

Cathode rays when obstructed by metal cause emission of -

Which of the following materials is a good insulator?

Which of the following is a plant hormone ?

When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of

1. Carbonates of Ca and Mg