First ionisaion potential of nitrogen is more than that first I.P of oxygen, but the second I.P of oxygen is more than the second IP of nitrogen. Explain.

State modern periodic law. What do you understand by first ionization potential? "The first ionization energy of nitrogen atom is greater than that of oxygen atom" Explain

Explain the following: P(K)b value for aniline is more than that for methylamine

Give reasons: ozone is more reactive than oxygen why?

Why is ICL more reactive than I_2 ?

The third term of an A.P. is 7 and its seventh term is 2 more than three times the third term. Find the sum of first 20 terms.

The sum of the twice of the first and the thrice of the third of three consecutive integers is less than six times of the second by 20. Find the three numbers.

Form the pair of linear equations in the following problems,and find their solution graphically.(i)10 students of class X took part in a Mathematics quiz.If the number of girls is 4 more than the number of boys,find the number of boys and girls who took part in the quiz.

The fifth term of a G.P. is four times the third term. The sum of the first and second term is -4.Determine the G.P.