The correct option is [C]. When zinc granules react with sulphuric acid (X), zinc sulphate (ZnSO₄) forms and hydrogen gas (Y) is released. The hydrogen gas burns with a pop sound near a candle, confirming its identity. Tiwari Academy provides CBSE ...
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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 ...
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
The ozone layer began depleting sharply in the 1980s due to CFCs and other ozone-depleting substances, not merely the natural formation of ozone. While oxygen atoms do combine with O₂ to form ozone, this process does not explain the rapid ...
A human child has all the basic features of humans, such as a brain, limbs, and facial structure. However, it does not look exactly like its parents; genetic variation ensures that each child shows differences in appearance and traits. The ...