Question
Which substance changes the rate of chemical reactions
and remains chemically different during reaction?Solution
"Trigger" loosely, it could be seen as a factor that initiates or changes the rate of a reaction. Typically, in chemistry, such a role is played by a catalyst, but a catalyst does not undergo permanent chemical change itself.
 Find the range of the given data:
18, 23, 36, 41, 55, 12, 62, 50, 48
 Find the value of 'a' in the given data if the mean of the given data is 20.
10, 15, 18, 22, 24, 19, 21, a, 16, 25
- What is the smallest number that must be added to 1500 so that it becomes exactly divisible by 47?
Find the sum of squares of first 20 natural numbers.
Arvind's age after 19 years will be 67 years. Ravi is 4 years older than Arvind. The ratio of present ages of Samar and Ravi is 9:13. Find the age of Sa...
Find the third proportion of 38 and 19.
The sum of the squares of two numbers is 250, and the difference between the two numbers is 4. Find the absolute difference between the cubes of these t...
What is the digit in the units place of the number (1624)24 ?
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