Among the following, presence of which brings

The process of union of two or more molecules of a substance to form a large single molecule is called :

Which of the following statements about the centre of mass (COM) of a system is always true?

Which of the following statements is not correct about the dual nature of matter?

A plane electromagnetic wave travels in vacuum along the z-direction. If the frequency of the wave is 20 MHz, what is its wavelength?

The spokes used in the wheel of a bicycle increase its –

Which of the following gases is also known as a 'Stranger' gas?

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

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

Which of the following is a cell surface receptor?

Consider the reaction-

Copper sulphate solution (blue) + Iron → Iron sulphate soluton + Copper What is the colour of the iron sulphate solution?