Modern Periodic Law and Present Form of the Periodic Table (s, p. d and f block elements,...) NEET Questions

Inorganic Chemistry - Classification of Elements and Periodicity in Properties

Modern Periodic Law and Present Form of the Periodic Table (s, p. d and f block elements,...) MCQ Questions


7.
Which of the following groups together with s-block constitute the Representative Elements?
A.
Groups 3-12
B.
Groups 13-18
C.
Actinoids
D.
Lanthanoids
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ANSWER :
B. Groups 13-18
8.
Group 16 elements are known as:
A.
Halogens
B.
Pnictogens
C.
Noble gases
D.
Chalcogens
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ANSWER :
D. Chalcogens
9.
Why do noble gases exhibit very low chemical reactivity?
A.
They have small atomic size
B.
They are gaseous at room temperature
C.
They have high atomic number
D.
They have completely filled valence shell ns²np⁶ configuration
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ANSWER :
D. They have completely filled valence shell ns²np⁶ configuration
10.
The element with electronic configuration [Ne]3s²3p⁵ belongs to which group and period?
A.
Group 16, Period 3
B.
Group 15, Period 3
C.
Group 17, Period 2
D.
Group 17, Period 3
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ANSWER :
D. Group 17, Period 3
11.
Which of the following is a characteristic property of halogens (Group 17)?
A.
They have positive electron gain enthalpies
B.
They have highly negative electron gain enthalpies
C.
They have low electron gain enthalpies
D.
They have zero electron gain enthalpy
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ANSWER :
B. They have highly negative electron gain enthalpies
12.
The general outer electronic configuration of d-block elements is:
A.
(n-1)d¹⁻¹⁰ns⁰⁻²
B.
ns¹⁻²
C.
ns²np¹⁻⁶
D.
(n-2)f¹⁻¹⁴(n-1)d⁰⁻¹ns²
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ANSWER :
A. (n-1)d¹⁻¹⁰ns⁰⁻²