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11th Chemistry Weekly Test - 2 ( Periodic Classification Of Elements )

MABS Institution

11th Chemistry Weekly Test - 2 ( Periodic Classification Of Elements )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 2 - Answer All Question

Explain the influence of shielding effect as the ionisation energy of elements

What is the basic difference in approach between Mendeleev's periodic table and modern periodic table?

Write a note about the electronic configuration of elements in groups

The first ionisation energy (lE₁) and second ionisation energy (lE₂) of elements X, Y and Z are given below.

Element IE₁(kJ mol^-1) IE₂(kJ mol^-1)

X 2370 5250

Y 522 7298

Z 1680 3381

Which one of the above elements is the most reactive metal, the least reactive metal and a noble gas?

What is the basic difference in approach between Mandeleev's periodic law and modem periodic law.

Give the IUPAC names and symbols of the following elements with atomic numbers 123, 126, 134, 148, 150

How does electron affinity vary in a group? Explain the cause for the variation

Explain the term valence or oxidation state. How does it vary in a period and in group?

What is effective nuclear charge?

Give the name and electronic configuration of elements of 1^st group and 2^nd group.

Part - B

Generic 5 - Answer All Question

Explain about the salient features of groups.

State the trends in the variation of electronegativity in group and periods.

Explain about the structural features of Moseley's long form of periodic table.
I.E increases as we move across the period but Ionisation enthalpies (I.E) of second period of elements in the order.
Li < B < Be < C < O < N < F < Ne
Explain why?
(i) Be has higher I.E and B
(ii) O has lower I.E than N & F

Distinguish between electron affinity and electron negativity.

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