The pH of milk, black coffee, tomato juice, lemon juice and egg white are '6.8,5.0', 4.2,2.2 and '7.8' respectively. Calculate corresponding hydrogen ion concentration in each.

The pH of black coffee is 5.0. Calculate the hydrogen ion concentration.

A firm deals with two kinds of fruit juices-pineapple and the, orange juice. These are mixed and two types of mixtures are obtained which is sold as soft drinks A and B , One tin of A need 4 litres of pineapple juice and 1 litre of orange juice. One tin of B needs 2 litres of pineapple and 3 litres of oranges juice. The firm has only 46 litres of pineapple juice and 24 litres of orange jụice. Each tin of A and B is sold at a profit of Rs. 4 /- and Rs. 3 /-respectively. How many tins of A and B should the firm produce to maximise profiț? Formulate the linear programming problem and solve it graphically.

Consider a quadrilateral whose vertices are A (- 4,2),B (2,6), C (8,5) and D (9,7) Find the mid point of the sides of the quadrilateral.

A bag contains 4 white and 2 black balls.Another bag contains 3 white and 5 black balls.If one ball is drawn from each bag.Find the probability that One is white and one is black.

A bag contains 4 white and 2 black balls.Another bag contains 3 white and 5 black balls.If one ball is drawn from each bag.Find the probability that both are black

The coordinate of the point dividing internally the line joining the points (4, -2) and (8,6) in the ratio 7:5 is

A bag contains 4 white and 2 black balls.Another bag contains 3 white and 5 black balls.If one ball is drawn from each bag.Find the probability that both are white