Given below are two statements. One is labelled as Assertion (A) and the other is labelled as reason (R).
 

A IS TRUE : one litre of water is 1000 grams, if this weight divided by molecular weight we get number of moles i.e 55.55

R is TRUE : Water has its maximum density of 1g/cm3 or 1000 kg/m³ at 4^∘C. When the temperature changes from either greater or less than 4 degrees, the density will become less than 1g/cm³. Water has the maximum density of 1g/cm3 only when it is pure water. 18 grams is the gram molecular weight of water therefore one mole

EXPLANATION : 1000 ml of water will become 1000g , as the density is 1gm/ml, hence 1000 divided by 18 will give 55.55 moles, hence R is explanation of A