Tamil Nadu Board - Class 9

Physical and Biological Sciences question bank (Science (அறிவியல்))

Practice 624 free Tamil Nadu Board - Class 9 Science (அறிவியல்) - Physical and Biological Sciences 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 'Measurement and Motion'?


(A)
Across a period, atomic radius decreases and electronegativity increases (Measurement and Motion)
(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 'Measurement and Motion'?


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