Day 5: CBSE Class 10 Science

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

Question 1
Chemical Reactions and Equations. Asked 3 times: 2023*, 2024*, 2026 (* = numbers or wording changed that year)
17 $When lead nitrate is heated in a boiling tube, we observe :$
Tap an option to check your answer.
Question 2
Chemical Reactions and Equations. Asked 3 times: 2024*, 2025*, 2026 (* = numbers or wording changed that year)
26 $2 g of green coloured crystals of ferrous sulphate are heated in a dry boiling tube. Name the type of chemical reaction taking place. Write the balanced chemical equation for the reaction. Is this an exothermic or an endothermic reaction ?$
Question 3
Control and Coordination. Asked 3 times: 2023*, 2025*, 2026 (* = numbers or wording changed that year)
10 (a) $“The timing and the amount of hormone secreted by a gland are regulated in the human body.” Justify this statement with the help of an example.$
Question 4
Control and Coordination. Asked 3 times: 2023*, 2024*, 2026 (* = numbers or wording changed that year)
7 $The growth of tendrils in grapes plants is due to :$
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Question 5
Control and Coordination. Asked 3 times: 2024*, 2025*, 2026 (* = numbers or wording changed that year)
12 (B) $Sunil unconsciously touched the hot iron rod and immediately withdrew his hand. Which type of action is involved ? Also define this action. Draw a flow chart to show the path followed for this action.$

Question 1