In a certain code language, ‘PERK’ is written as

The pitch of a sound is primarily determined by which of the following?

In a nuclear reaction, the product nucleus has higher binding energy per nucleon than the reactants. Which of the following is correct?

Which of the following statements is true about sound?  

A soap bubble shows colours when illuminated with white light. This is due to –

Which physical quantity is conserved in a collision (in the absence of external forces)?  

Which law states that energy can neither be created nor destroyed?

What happens to the wavelength of light when it passes from a medium of higher refractive index to a medium of lower refractive index?  

Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid:

A body moves with uniform acceleration and covers 80 m in 4 s and 160 m in next 4 s. Find initial velocity.

Which among the following is not a characteristic of transition metals?