Tamil Nadu Board - Class 9

World & Indian History question bank (Social Science (சமூக அறிவியல்))

Practice 592 free Tamil Nadu Board - Class 9 Social Science (சமூக அறிவியல்) - World & Indian History questions with answers and step-by-step solutions.

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Q1.

Chemistry & Periodic Table: How does atomic radius and electronegativity vary along a period in 'Evolution of Humans and Society'?


(A)
Across a period, atomic radius decreases and electronegativity increases (Evolution of Humans and Society)
(B)
Atomic radius increases
(C)
No periodic trend
(D)
None of these
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Q2.

Optics & Human Eye: Which corrective lens is prescribed for myopia (short-sightedness) in 'Evolution of Humans and Society'?


(A)
Concave lens of suitable focal length to diverge light rays onto retina (Evolution of Humans and Society)
(B)
Convex lens
(C)
Cylindrical mirror
(D)
None of these
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