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One is added to odd digit of the first number and one is subtracted from even digit of the first number and then both the digits are multiplied to obtain the second number. (8 – 1) x (3 + 1) = 7 x 4 = 28 (9 +1) x (2 – 1) = 10 x 1 = 10 (5 + 1) x (6 – 1) = 6 x 5 = 30
Which of the following is a physical change?
The pH of a neutral solution is —
The gas used for filling weather balloons is-
The major constituent of air is
Milk tastes sour when kept in the open for sometimes due to the formation of-
The noble gas used in radiotherapy is
______is the process in which acids and bases react to form salts and water
The acid used in lead storage cells is-
The pH of a neutral solution is —
Formation of ozone hole is maximum over