Periodic Classification of Elements XI CBSE

	B	C	D	E	F	G	H	I	J	K	L	M	N	O
1	Timestamp	Score	Name of Student	School and City	Q1. Which is the correct order of ionic sizes (At. No. : Ce = 58, Sn = 50, Yb = 70 and Lu = 71) ?	Q2. The order of increasing sizes of atomic radii among the elements O, S, Se and As is	Q3. In the ions P–3, S–2 and Cl–, the increasing order of size is	Q4. Which of the following is correct ?	Q5. Why the size of an anion is larger than the parent atom?	Q6. Arrange S, P, As in order of increasing ionisation energy	Q7. The statement that is not correct for periodic classification of elements is	Q8. Consider the following changes	Q9. Of the given electronic configurations for the elements, which electronic configuration indicates that there will be abnormally high difference in the second and third ionization energy for the element?	Q10. Alkali metals are powerful reducing agents because

2	10/17/2020 18:08:34	7 / 10	AVIRAL MISHRA	LUCKNOW	Sn > Ce > Yb > Lu	O < S < As < Se	P–3 < S–2 < Cl–	Isoelectronic ions have same number of electrons	(b) Due to decrease in effective nuclear charge.	S < P < As	For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.	E1 < E2	1s2 2s2 2p6 3s2	their ionisation potential is low
3	10/17/2020 18:11:43	10 / 10	AVIRAL MISHRA (error was there is last submission)	LUCKNOW	Sn > Ce > Yb > Lu	O < S < As < Se	Cl– < S–2 < P–3	Isoelectronic ions have same number of electrons	(d) Both (a) and (b)	As < S < P	For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.	E1 < E2	1s2 2s2 2p6 3s2	their ionisation potential is low
4	8/8/2021 10:35:19	5 / 10	AAAA	AA	Sn > Ce > Yb > Lu	Se < S < As < O	Cl– < S–2 < P–3	Isoelectronic ions have same neutrons	(a) Due to increased repulsion among the electrons.	P < S < As	For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.	E1 < E2	1s2 2s2 2p6 3s2	their ionic radii are large
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