The correct answer is option (A). Magnetic field lines never intersect, as stated in the assertion. The reason is correct because intersection would imply two field directions at a single point, which is impossible. Thus, both A and R are ...
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The correct answer is option (d) III and IV. Myopia occurs when the focal length of the eye lens is too short or the eyeball is elongated, causing the image to form in front of the retina. class 10 science half ...
The correct answer is option (c) glass slab. When a parallel beam of light passes through a glass slab, it emerges parallel but laterally displaced. Unlike mirrors, lenses, or prisms, only a glass slab produces this unique lateral displacement effect. latest ...
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 ...
The correct option is [C]. Sodium carbonate decahydrate (Na₂CO₃·10H₂O), also called washing soda, is used to remove permanent hardness of water. It reacts with calcium and magnesium salts, forming insoluble carbonates, softening the water effectively. Download cbse sample paper for class ...