Classification of Elements and Periodicity in Properties Test

Result

Classification of Elements and Periodicity in Properties Test - 18

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following are isoelectronic and isostructural?

A

B

C

D

Solution
Question 2
4 / -1

Which of the following element is most electropositive?

A
Al

B
Mg

C
P

D
S
Question 3
4 / -1

One mole of magnesium in the vapour state absorbed 1200 kJ of energy. If the first and second ionization enthalpies of magnesium are 750 and 1450 kJ mol^-1 respectively, the final composition of the mixture is

A

B

C

D

Solution
Question 4
4 / -1

The van der waals’ radii of O, N, Cl, F and Ne increase in the order

A
F, O, N, Ne, Cl

B
N, O, F, Ne, Cl

C
Ne, F, O, N, Cl

D
F, Cl, O, N, Ne
Question 5
4 / -1

The IUPAC name of the element with atomic number Z = 109 is

A
U np

B
U ns

C
U no

D
U ne
Question 6
4 / -1

In which of the following pairs both the species have nearly the same size?

A
Rb⁺ , O^2-

B
Li⁺, Mg²⁺

C
Fe, Co

D
All the three
Question 7
4 / -1

If the ionic radii of K⁺ and F^- are nearly the same (i.e. 1.340Å), then the atomic radii of K and F respectively are

A
1.34Å, 1.34Å

B
0.72Å, 1.96Å

C
1.96Å, 0.72Å

D
1.96Å, 1.34Å
Question 8
4 / -1

P₄ has exceptional outer electronic configuration as 4d¹⁰5s^o. It belongs to

A
4th Period, group 11

B
5th Period, group 10

C
6th Period, group 9

D
3rd Period, group 16
Question 9
4 / -1

Ionization enthalpy of an ion is equal to

A
Electron gain enthalpy of the atom

B
Electronegativity of the ion

C
Ionization enthalpy of the ion

D
None of these
Question 10
4 / -1

The correct values of ionization enthalpies (in kJ mol-1) of Si, P, Cl and S respectively are:

A
786, 1012, 999, 1256

B
1012, 786, 999, 1256

C
786, 1012, 1256, 999

D
786, 999, 1012, 1256