As we know that when the exhaled air rich in carbon dioxide is blown from mouth into test tube. The lime water turns milky on passing CO₂ gas into it due to formation of insoluble calcium carbonate (CaCO3). As it ...

Silver and mercury are less reactive than copper and as copper will displace those metals from its salt solution which are less reactive than it.

We know that zinc layer prevents iron from getting rusted. Through galvanization method, iron is covered by a coat of zinc. Where there is no chance to corrosion of Iron metal.

The incident rays coming from the distant tree placed will be parallel to the principal axis and as we know the rays parallel to the principal axis, after refraction by convex lens, will pass through the principal focus. Therefore, a ...