Day 190: CBSE Class 10 Science

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

Question 1
Magnetic Effects of Electric Current. Asked once: 2023 (same type asked 5 times)
Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
19 $Assertion (A) : The magnetic field lines around a current carrying straight wire do not intersect each other. Reason (R) : The magnitude of the magnetic field produced at a given point increases as the current through the wire increases.$
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Question 2
Our Environment. Asked once: 2024 (same type asked 5 times)
Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
20 $Assertion (A) : The waste we generate daily may be biodegradable or non-biodegradable. Reason (R) : The waste generated, if not disposed off properly may cause serious environmental problems.$
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Question 3
Carbon and its Compounds. Asked once: 2023 (same type asked 4 times)
36 (A) $Write the chemical equation for the following : (i) Combustion of methane (ii) Oxidation of ethanol (iii) Hydrogenation of ethene (iv) Esterification Reaction (v) Saponification Reaction$
Question 4
Chemical Reactions and Equations. Asked once: 2023 (same type asked 4 times)
33 $State the change in colour observed in each of the following cases mentioning the reason : (a) Silver chloride is exposed to sunlight. (b) A piece of zinc is dipped in ferrous sulphate solution. (c) Copper powder is strongly heated in air.$
Question 5
Chemical Reactions and Equations. Asked once: 2023 (same type asked 4 times)
12 $\mathrm{Mg + 2HCl \rightarrow MgCl_2 + H_2}$
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Question 1

Question 2

Question 3

Question 4

Question 5