Both A and B are true but R is not the correct explanation of A. Baking soda is used in Soda acid fire extinguishers because it release is carbon dioxide gas upon reaction with H2SO4. CO2 helps put out fire ...
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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 ...
(i) Fertilization in human females takes place in the **oviduct (fallopian tube). (ii) The uterus prepares for embryo implantation by thickening its inner lining, the endometrium, which becomes soft, spongy, and richly supplied with blood vessels. cbse class 10 science half ...
Excessive use of chemicals and pesticides pollutes soil, air, and water, kills beneficial organisms, reduces soil fertility, contaminates crops and enters the food chain, ultimately harming biodiversity, human health and causing long-term environmental degradation. class 10 science half yearly paper download class ...
Plugging a leak in a blood vessel is essential to prevent entry of pathogens and maintain blood circulation. The blood component responsible is platelets, which stick to the damaged site, release clotting factors and form a temporary plug, eventually leading ...