Classification of Elements and Periodicity in Properties Test

Result

Classification of Elements and Periodicity in Properties Test - 7

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Weekly Quiz Competition

Question 1
4 / -1

Increase in atomic size down the group is due to

A
increase in number of electrons

B
increase in number of protons and neutrons

C
increase in number of protons

D
increase in number of protons, neutrons and electrons
Question 2
4 / -1

The electron affinity values (in kJ mol ^-1) of three halogens X, Y and Z are respectively -349, - 333 and -325. Then, X, Y and Z respectively, are

A
F₂ , Cl₂ and Br₂

B
Cl₂ , F₂ and Br₂

C
Cl₂ , Br₂ and F₂

D
Br₂ , Cl₂ and F₂

Solution
Question 3
4 / -1

Which one of the following is an amphoteric oxide?

A
ZnO

B
Na₂O

C
SO₂

D
B₂O₃

Solution
Question 4
4 / -1

The first ionisation potential of Na, Mg, Al and Si are in the order

A
Na < Mg > Al < Si

B
Na > Mg > Al < Si

C
Na < Mg < Al > Si

D
Na > Mg > Al < Si
Question 5
4 / -1

Ionic radius is

A
inversely proportional to effective nuclear charge

B
inversely proportional to square of effective nuclear charge

C
directly proportional to effective nuclear charge

D
directly proportional to square of effective nuclear charge

Solution
Question 6
4 / -1

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?

A
Cl < F < S < O

B
O < S < F < Cl

C
S < O < Cl < F

D
F < Cl < O < S
Question 7
4 / -1

The electronic configuration of most electronegative elements is

A
1s², 2s², 2p⁵

B
1s², 2s², 2p⁴, 3s¹

C
1s², 2s², 2p⁶, 3s¹, 3p⁵

D
1s², 2s², 2p⁶, 3s², 3p⁵

Solution
Question 8
4 / -1

Which one of the following ions has the highest value of ionic radius ?

A
Li⁺

B
B³⁺

C
O^2-

D
F^-

Solution
Question 9
4 / -1

Pauling's equation for determining the electronegativity of an element, is
where, X_A, X_B = electronegativity values of elements A and B, ∆ = represents polarity of A-B bond.

A

B

C

D

Solution
Question 10
4 / -1

The ionic radius (Å) of C^4- and O^2- respectively, are 2.60 and 1.40. The ionic radius of the isoelectronic ion N^3- would be

A
2.6

B
1.71

C
1.4

D
0.95

Solution