Name the gas that
turns moist red litmus blue.

From the gases - ammonia , chlorine , hydrogen chloride , sulphur dioxide , select the gas that turns moist red litmus paper blue . Write the equation for the reaction - when the gas is passed over heated CuO .

Gas A is formed on the hydrolysis of calcium cyanamide. The gas can turn moist litmus paper blue and forms a brown precipitate with Nessler's reagent. The gas, A is

Name the gas that turns moist starch iodide paper blue black.

Name the gas that turns moist starch iodide paper blue black.

A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :

A gas 'X' combines with another gas 'Y' in the presence of a catalyst 'C' to form a colourless gas 'Z'. The gas Z gives dense white fumes with hydrogen chloride and the gas 'Y' turns red litmus blue. Name the catalyst C.

compound X is tested and the results are shown in the following table. |{:("Test","Result",),("Aqueous NaOH is added and heated gently.","Gas released turns moist red litmus paper blue",),("Dilute HCl is added","Gas is evolved accompanied by brisk effervescence. It turns lime water milky and acidified " K_(2)Cr_(2)O_(7) " paper green.",):}| The compound X contains

Name the gas that turns colourless PbNO_3 solution into black.

Select the true and false statements: An acid turns red litmus blue.

A mixture of two salt was treated as follows : i. The mixture was heated with magnanese dioxide and concentrated sulphuric acid , when a yellowish -green gas was liberated. ii. The mixture on heating with sodium hydroxide solution gave a gas which turned red litmus blue iii. Its solution in water gave a blue precipitate with potassium ferricyanide and red colourtion with ammonium thiocynate iv. The mixture was boiled with potassium hydroxide and the librated gas was bubbled through an alkline solution of K_(2)HgI_(4) to give a brown precipitate identify the two salts gives ionic equation for the reaction involved in the tests (i) , (ii) and (iii).