Sir in 3rd quiestion the answer is 'shape' 3rd option becoz fluid offer no resistance to change in shape but in pressure it 9ffer resistance. So 3rd is correct
sir if we add water in cement .. first process is chemical reaction occurs first.. by the chemical reaction process .. the constituent of cement react and exothermic process is occured.. by this heat is generated..... therefore it is possible .. the correct ans will be option A???