Day 233: CBSE Class 10 Science

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

Question 1
Control and Coordination. Asked once: 2024
7 $Identify an involuntary action from the following :$
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Question 2
Electricity. Asked once: 2025
22 (a) $Consider the following circuits : In which circuit will the power dissipated in the circuit be (I) minimum (II) maximum ? Justify your answer.$
Question 3
Acids, Bases and Salts. Asked once: 2024
21 (a) $1 gram of solid sodium chloride was taken in a clean and dry test tube and concentrated sulphuric acid was added to it. (i) Name the gas evolved in the reaction. (ii) What will be observed when this gas is tested with (I) dry, and (II) wet blue litmus paper ? Write your conclusion about the nature (acidic/basic) of this gas.$
Question 4
Carbon and its Compounds. Asked once: 2022
11 $“Two different forms of carbon - diamond and graphite have different structures and very different physical properties even though their chemical properties are same.” Explain why.$
Question 5
Control and Coordination. Asked once: 2024
Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
20 $Assertion (A) : Receptors are usually located in our sense organs and perceive a particular stimulus. Reason (R) : Different sense organs have different receptors for detecting stimuli.$
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Question 1