The correct option is [B]. Sodium hydroxide is called an alkali because it is a base that dissolves in water, forming a basic solution. Ferric hydroxide, though a base, is insoluble in water and not termed an alkali. class 10 science ...
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The correct observation is (a). In test tube P, zinc displaces copper from copper sulphate, forming a red-brown copper layer on the strip. In test tube Q, no reaction occurs as zinc cannot displace magnesium from magnesium sulphate. class 10 science ...
When a piece of magnesium ribbon is ignited, light and heat are produced. Magnesium ribbon on burning in air is an exothermic reaction. correct option is (c). CBSE Sample Paper Class 10 Science 2025-26 Download cbse sample paper for class 10 science
Self-pollination occurs when pollen from a flower’s anther falls on its own stigma, ensuring genetic similarity. Cross-pollination occurs when pollen from one flower reaches the stigma of another, promoting genetic variation. extra cbse sample paper download on Tiwari Academy latest cbse sample ...
The developing embryo gets nutrition from the mother’s blood through the placenta. Nutrients and oxygen pass from maternal blood to the embryo, while waste products move from the embryo to the mother for disposal. CBSE Sample Paper Class 10 Science 2025-26 Tiwari ...