Correct option – D. Sodium chloride. When aqueous barium chloride reacts with aqueous sodium sulphate, barium sulphate precipitates and sodium chloride remains in the solution. Thus the aqueous solution formed contains NaCl with BaSO₄ as solid precipitate. cbse sample paper 2025 ...
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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 ...
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 ...
The magnetic field strength is more in the region where the field lines are crowded. This means the field strength is maximum near the poles and it reduces as we go away from the poles. The direction of the magnetic ...
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 ...