Online Chemistry MCQs Quiz Unit-3: Periodic Table and Periodicity Properties

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SSC-1 (Class-9) Chemistry (National Book Foundation as Federal Text Board Islamabad)

(i) Number of periods in the periodic table are:

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(a) 8

(b) 7

(d) 5

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(ii) Which of the following groups contain alkaline earth metals?

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(a) 1A

(b) II A

(d) VIIIA

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(iii) Which of the following elements belongs to VIIIA?

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(a) Na

(b) Mg

(d) Xe

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(iv) Main group elements are arranged in _____ groups.

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(a) 6

(b) 7

(d) 10

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(v) Period number of ²⁷Al₁₃ :

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(a) 1

(b) 2

(d) 4

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(vi) Valence shell electronic configuration of an element M (atomic no. 14) is:

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(a) 2s² 2p¹

(b) 2s² 2p²

(d) 3s² 3p²

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(vii) Which of the following elements you expect to have greater shielding effect?

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(a) Li

(b) Na

(d) Rb

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(viii) As you move from right to left across a period, which of the following does not increase:

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(a) electron affinity

(b) ionization energy

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(ix) All the elements of Group IIA are less reactive than alkali metals. This is because these elements have:

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(a) high ionization energies

(b) relatively greater atomic sizes

(d) decreased nuclear charge

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