Spray of atrazine in low concentration acts as _______

Deficiency of _________ causes the leaves to develop a dark green colouration.

A stone is dropped from a height of 45 m. How long will it take to reach the ground? (Take g = 9.8 m/s² )

Natural radioactivity was discovered by 

Ohm’s law obeyed in -

Which among the following is produced using ‘Haber Process’?

Which of the following is used as red pigment in making batteries, lead glass and rust proof primer paints?

The rate of change of which of the following determines angular velocity?

Which of the following is the most common cause of stomach ulcers?

If a force of 10 N is applied to a mass of 2 kg, what is the acceleration?