A shopkeeper gives 4 notebooks free on purchase of 21

The pH of blood is primarily regulated by:

Which chemical is used to make artificial rain?

What is the product of the reaction?

CH₃COOH + CH₃OH → (H⁺, heat)

A mobile phone charger is 

Insulin is secreted by which organ?

Noise is measured in –

The Weight of an object on Earth is 600 N. What will be its weight on moon?

Which of the following is an unsaturated hydrocarbon ?

The sharpness of a television image is termed as its –

NaOH + HC1 -> NaCl + H₂ O in the given chemical reaction