Q1. Arrange the following substances in decreasing order of their pH -
- ((1)) (II) > (I) > (IV) > (III)
- ((2)) (II) > (I) > (III) > (IV)
- ((3)) (I) > (III) > (IV) > (II)
- ((4)) (I) > (IV) > (III) > (II)
- ((i)) मनुष्य रक्त
- ((ii)) काली कॉफी
- ((iii)) मनुष्य लार
- ((iv)) दूध
- (i) Human Blood
- (ii) Black Coffee
- (iii) Human Saliva
- (iv) Milk