Periodic classification of elements Class 11 | JEE NEET CBSE NCERT Questions

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➡️Free NCERT Solutions https://www.examfear.com/cbse-ncert-s...

Timestamps:
0:00 Introduction
1:09 Q1 KCET
7:25 Q2 COMEDK
8:39 Q3 AIPMT
10:22 Q4 JEE Mains
12:03 Q5 Mains
17:13 Q6 NCERT
20:13 Q7 Mains
22:13 AIPMT
26:02 NCERT
31:32 NCERT

Questions on periodicity of elements and their classification from ncert and from previous competitive exams like JEE( Mains, Advanced) , NEET etc.
In this video we will cover:-
1.Question 1: -Generally, the first ionisation energy increases along a period. But there are some exceptions one which is not an exception is
2.Question 2:-An element with atomic number 21 is
3.Question 3:- The species Ar, K+ and Ca2+ contain the same number of electrons. In which order do their radii increase?
4.Question 4:-The group having isoelectronic species is
5.Question 5:- Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?
6.Question 6:- Consider the following species:
N3–, O2–, F–, Na+, Mg2+ and Al3+
(a) What is common in them?
(b) Arrange them in the order of increasing ionic radii.
7.Question 7:- The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
8.Question 8:- Identify the wrong statement in the following?
9. Question 9:- The first ionization enthalpy values (in kJ mol–1) of group 13 elements are:
B Al Ga In Tl
801 577 579 558 589
How would you explain this deviation from the general trend?
10. Question 10:- Energy of an electron in the ground state of the hydrogen atom is −2.18×10−18 J. Calculate the ionization enthalpy of atomic hydrogen in terms of J mol−1.

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