Chemistry Past Questions and Answers

A colourless organic compound X was burnt in excess air to give two colourless and odourless gases, Y and Z, as products. X does not decolorize blue bromine vapour, Y turns lime milky while Z gives a blue colour with copper (ll) tetraoxosulphate (IV). <br/>Compound X is?

A colourless organic compound X was burnt in excess air to give two colourless and odourless gases, Y and Z, as products. X does not decolorize blue bromine vapour, Y turns lime milky while Z gives a blue colour with copper (ll) tetraoxosulphate (IV).<br/>Y and Z are respectively?

Which of the following compounds is NOT the correct product formed when the parent metals is heated in air?

The atomic number of an element whose cation, X<sup style='font-size: smaller;'>2+</sup>, has the ground state electronic configuration 1s<sup style='font-size: smaller;'>2</sup>2s<sup style='font-size: smaller;'>2</sup>2p<sup style='font-size: smaller;'>6</sup>3s<sup style='font-size: smaller;'>2</sup>2p<sup style='font-size: smaller;'>6</sup> is?

When marble is heated to about 1473 K, another white solid is obtained which reacts vigorously with water to give an alkaline solution. The solution contains?