An organic compound 'X' of molecular formula C2H4O2 gives brisk effervescence with sodium bicarbonate. Give the name and formula of X.

The oxidation state of Ag in AgF2 is +2. But, +2 is an unstable oxidation state of Ag. Therefore, whenever AgF2 is formed, silver readily accepts an electron to form...

(i) Sodium oxide                 → Na2O  (ii) Aluminium chloride       → AlCl3  (iii) Sodium suphide           → Na2S  (iv) Magnesium hydroxide → Mg(OH)2

(ii) Streptomycin

The gas that extinguishes a burning candle is carbon dioxide. It is formed by the action of dilute hydrochloric acid on a metal carbonate or metal hydrogen carbonate and produces...

Is question is complete?

A colourless gas with brisk effervescence is evolved on addition of sodium bicarbonate to acetic acid. Lime water turns milky when this gas is passed through it, thus the evolved...

The colour of the pH paper did not change because pH paper shows colour depending on the hydrogen ion concentration in solution. Solid sodium bicarbonate does not produce hydrogen ions...

The liberated gas is carbon dioxide, CO2.  Lime water turns milky on passing CO2 through it.

(a) : 3Na4[Fe(CN)6] + 4Fe3+  → Fe4 [Fe(CN)6]3 + 12Na+  Prussian blue