Day 195: 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 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.
20 $Assertion (A) : A current carrying straight conductor experiences a force when placed perpendicular to the direction of magnetic field. Reason (R) : The net charge on a current carrying conductor is always zero.$
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Question 2
Metals and Non-metals. Asked once: 2024 (same type asked 4 times)
27 $State reasons for the following : (a) Zinc oxide is an amphoteric oxide. (b) Sodium metal is stored in bottle filled with kerosene oil. (c) In the reactions of nitric acid with metals, generally hydrogen gas is not evolved.$
Question 3
Metals and Non-metals. Asked once: 2025 (same type asked 4 times)
3 $The most common method of extraction of metals from their oxide ores is :$
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Question 4
Metals and Non-metals. Asked once: 2023 (same type asked 4 times)
10 $Which of the following metals do not corrode in moist air ?$
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Question 5
Metals and Non-metals. Asked once: 2023 (same type asked 4 times)
3 $Copper is used for making cooking utensils. Which of the following physical properties of copper is NOT responsible for the same ?$
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Question 1