Question
Which of the following is not a physical
change?Solution
Burning of coal is a chemical change, as it involves combustion and produces new substances. (B) Dissolving salt in water: Correct, it is a physical change. (C) Melting of ice: Correct, it is a physical change.
2660.03 ÷ 94.98 x 59.9 = ? + 20.32
Find the approximate value of Question mark(?). No need to find the exact value.
(55.96 × 4.01) ÷ 7 + √(120.81) × 3 – 10% of 199.99 = ?<...
2720.03 ÷ 79.98 x 39.9 = ? + 40.32
(5.013 – 30.04) = ? + 11.98% of 4799.98
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
960.02 of 238.89 ÷ 144.01 of 79.97 = ?
6940 ÷ 28 ÷ 7 =?
?2 - 12.5% of 647.99 = 24.98% × 363.97 + 5% of 1059.98
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)