NCERT Solutions for class 11 Chemistry Chapter 3 Classification of Elements and Periodicity

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Questions
1 Which Group Does Only Contain Metals?
A IA
B IIA
C IB
D None of the above.

Answer:IB
2 36 Atomic Number Belongs to –
A F
B S
C D
D P

Answer: P
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3 The Diagonal Relationship can be Observed by -
A Elements of 3rd period.
B Elements of 1st period.
C Elements of 2nd period.
D Both a and c.

Answer:Both a and c.
4 Which One is the Heaviest Atom?
A Pb.
B U.
C Hg.
D Ra.

Answer:U.
5 Element with Atomic Number 6 Belongs to
A IV period.
B III group.
C IV group.
D VI group.

Answer:IV group.
6 Which Group of Elements can Form Anions Most Quickly?
A Halogens.
B Oxygen family.
C Alkali metals.
D Nitrogen family.

Answer:Halogens.
7 What Increase While Moving Down a Group of Regular Elements?
A Atomic mass.
B Atomic number.
C Atomic weight.
D None of the above.

Answer:Atomic number.
8 Which Element has the Highest Atomic Radius?
A Si.
B Mg.
C P.
D Al.

Answer:Mg.
9 Which of the Following Cation has the Smallest Radius?
A Na+
B Li+
C Be2+
D K+

Answer:Be2+
10 Which One is the Smallest Ion?
A Al3+
B Mg+
C Na+
D Ba2+

Answer:Al3+
11 What is the Common Characteristic of Elements having 86, 54, 36, 18, and 10 Atomic Numbers?
A Inert gasses.
B Rare earth.
C Light metals.
D Halogens.

Answer:Inert gasses.
12 What is the Characteristic of (n-1) d1-10ns0-2 Electronic Structure?
A Actinides.
B Transition elements.
C Rare gasses.
D Lanthanides.

Answer:Transition elements.
13 What Happens to the Metallic Character of Elements When you Move from LLeft to Right of the Periodic Table?
A Decrease.
B Increase.
C Initially increases and after that decreases.
D Remains constant.

Answer:Decrease.
14 The Californium Element Belongs to Which Family?
A Alkali metal.
B Lanthanide series.
C Alkaline earth.
D Actinide series.

Answer:Actinide series.
15 Which of the Following Block Refers to the Element with 29 Atomic Number?
A P-block.
B D-block.
C F-block.
D S-block.

Answer:S-block.
16 From Which Group, Does the Element Having Atomic Number 16 Belong?
A 5th
B 4th
C 6th
D 3rd

Answer:6th
17 What is the Atomic Number of the Element with 1s 2, 2s2, 2p6, 3s2, 3p3 Electronic Configuration?
A 34.
B 49.
C 31.
D 33.

Answer:33.
18 What is the Position of the Element Having Quantum Numbers l = 1, n = 2, s = 1/2, m = 1, in the Periodic Table?
A Group 0, period II.
B Group VIIA, period II.
C Group 0, period III.
D Group VIIA, period III.

Answer:Group 0, period II.
19 Which Groups from the Below Options have the s-block Elements?
A IVA and IIIA.
B VIIA and VA.
C IIA and IA.
D Subgroups of B.

Answer:IIA and IA.
20 Which Statement is not Correct for the Element with 1s2, 2s2p6, 3s1 Electronic Configuration?
A This is a non-metal.
B This creates basic oxide.
C This element is with a low electron affinity.
D This is a monovalent electropositive.

Answer: This is a non-metal.

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