Correct option – D. Assertion A is false — C4H10 is saturated (alkane) while C4H8 (alkene) and C4H6 (alkyne/diene) are unsaturated. Reason R is true because the listed compounds (except C4H10) are unsaturated, so choose option D. cbse sample paper 2025-26 ...
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When a wire of resistance R is cut into three equal parts, each part has resistance R/3. These three parts connected in parallel give an equivalent resistance R₁ = R/9. Hence, the ratio R₁ : R = 1 : 9. Science ...
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a) 10000J because only 10 % of energy is available for the next trophic level. b) No, since the loss of energy at each step is so great that very little usable energy will remain after 4 trophic levels. Science important questions ...
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