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11th Chemistry Weekly Test - 1 ( Periodic Classification Of Elements )

MABS Institution

11th Chemistry Weekly Test - 1 ( Periodic Classification Of Elements )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are

metalliods
transition elements
non-metals
gases

______ proposed modern periodic law.

Henry Moseley
Mendeleev
Newland
Dobrainer

Consider the following statements.
(i) d-block elements show variable oxidate states.
(ii) Mostly d-block elements form colourless compounds.
(iii) Mostly d-block elements are diamagnetic due to paired electrons.
Which of the above statement is/are not correct?

(i) only
(ii) only
(i) and (ii)
(ii) and (iii)

The most electronegative element of the periodic table is _______

Iodine
Flourine
Chlorine
Oxygen

The number of groups in the periodic table is

7
18
5
6

Ionic radii vary in:
(1) inverse proportion to the effective nuclear charge
(2) inverse proportion to the square of the effective nuclear charge.
(3) direct proportion to the screening effect.
(4) direct proportion to the square of screening effect

1,2
1,3
2,3
2,4

Which element has smallest size?

B
N
Al
P

Which one among the following species has the largest atomic radius?

Na
Mg
AI
Si

Group 16 of the periodic table is called as ____

oxygen family
chalcogen family
both a and b
halogen family

Correct order of 1st ionization potential among elements Be, B, C, N, O is

B < Be < C< O < N
B < Be < C< N < O
Be < B < C< N < O
Be < B < C< O < N

Part - B

Generic 2 - Answer All Question

What are isoelectronic icons? Give example.

What are d-block elements? Why are they called so?

What are f-block elements? How many series are there? Why they are called f-block elements?
Define ionic radius.

What are the anomalies of the long form of periodic table?

Part - C

Generic 3 - Answer All Question

Define covalent radius.

What are inner transition elements?

Why are noble gases chemically inert?
How does the shielding effect caused by inner electrons affect the ionisation energy?

Ionization energy of Mg is greater than that of AI. Why?

Part - D

Generic 5 - Answer All Question

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

Calculate the effective nuclear charge experienced by the 4s electron in potassium atom.

Distinguish between electron affinity and electron negativity.

(a) State Mendeleev's periodic law.
(b) Describe about the merits of Mendeleev's periodic table.
Explain the periodic trend of ionisation potential.

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