Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Which among the following changes are exothermic or endothermic in nature?

Which among the following are physical changes?

(multi correct question)

It is necessary to balance a chemical equation in order to satisfy the law of:

Rusting of iron involves a chemical reaction which is a combination of:

When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:

This is a set up of :

For some integer m, every even integer is of the form

n² ‒1 is divisible by 8, if n is

If the HCF of 65 and 117 is expressible in the form 65m ‒ 117, then the value of m is

If two positive integers a and b are written as a = x³y² and b = xy³ , where x, y are prime numbers, then HCF ( a, b) is

The product of a non-zero rational and an irrational number is

The least number that is divisible by all the numbers from 1 to 10 (both inclusive)

.......

Which of the following is not irrational?

If b = 3, then any integer can be expressed as a =

There are 312, 260 and 156 students in class X, XI and XII respectively. Buses are to be hired to take these students to a picnic. Find the maximum number of students who can sit in a bus if each bus takes equal number of students

There is a circular path around a sports field. Priya takes 18 minutes to drive one round of the field. Harish takes 12 minutes. Suppose they both start at the same point and at the same time and go in the same direction. After how many minutes will they meet ?

The largest number which divides 60 and 75, leaving remainders 8 and 10 respectively, is

If HCF (16, y) = 8 and LCM (16, y) = 48, then the value of y is