Which one of the following does not involve a chemical reaction?
Digestion of food in our body
Process of respiration
Burning of candle wax when heated
Melting of candle wax on heating

Which one of the following processes involve chemical reactions?

Which one of the following reactions does not involve either oxidation ore reduction ?

Which of the following componds does not evolve oxygen when heated alone ?

Which chemical change among the following involves absorption of heat?

Which one of the following pairs of food components starts its digestion only when it reaches the stomach ?

In angiosperms , which one of the following processes does not involve an unequal division ?

Which one of the following process of transporting substances across a membrane does not involve a change in shape of the transport protein

When a candle burns, wax melts, melting of wax is a ___________ change.

Which among the following are physical or chemical changes? (a) Evaporation of petrol (b) Burning of Liquefied Petroleum Gas (LPG) (c) Heating of an iron rod to red hot (d) Curdling of milk (e) Sublimation of solid ammonium chloride

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)