Day 81: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

Question 1
Metals and Non-metals. Asked once: 2025 (same type asked 4 times)
3 $The property by virtue of which a solid material can be drawn into thin wires is called :$
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Question 2
Metals and Non-metals. Asked once: 2026 (same type asked 4 times)
23 $\mathrm{HCl}$
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Question 3
Our Environment. Asked once: 2026 (same type asked 4 times)
Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
9 $Assertion (A) : Highest percentage of pesticides is found in tertiary consumers in a food chain. Reason (R) : Chemicals / pesticides get accumulated progressively at each trophic level.$
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Question 4
Our Environment. Asked once: 2025 (same type asked 4 times)
15 $Which of the following groups do not constitute a food chain ? (i) Wolf, rabbit, grass, lion (ii) Plankton, man, grasshopper, fish (iii) Hawk, grass, snake, grasshopper, frog (iv) Grass, snake, wolf, tiger$
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Question 5
Our Environment. Asked once: 2026 (same type asked 4 times)
12 $(a) Explain the role of UV radiation in the formation of ozone layer. (b) Why is UV radiation considered as highly damaging to organisms ?$

Question 1