The correct option is (c) CFCs; Ozone. In 1987, the Montreal Protocol was signed to stop production of chlorofluorocarbons (CFCs), which deplete the ozone layer that protects Earth from harmful ultraviolet radiation. This step helped save the ozone. cbse sample paper ...
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The correct option is (c) scattering of light. When sunlight enters the atmosphere, fine particles like dust and gases scatter the light in all directions. This scattering makes the sky appear blue and causes reddish sunsets. CBSE Class 10 Science Question ...
The correct option is (d) behind the mirror and its position varies according to the object distance. A convex mirror always forms a virtual, upright, and diminished image behind the mirror. The image position changes slightly with object distance. CBSE Class ...
The correct option is (c) lack of oxygen and formation of lactic acid. During heavy exercise, muscles may not get enough oxygen. Then, glucose breaks down anaerobically to form lactic acid. The accumulation of lactic acid causes muscle cramps and ...
The correct option is (c). The height of a plant depends on growth hormones like auxins and gibberellins. Genes code for specific enzymes, which regulate hormone activity, thereby controlling the plant’s height and overall growth. class 10 science Question Paper answer ...