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

(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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