State your observation for the following cases :
Dry red rose petals are placed in the jar of sulphur dioxide.

State your observation for the following cases : Moist blue litmus is introduced into a gas jar of sulphur dioxide.

State your observation for the following cases : Paper soaked in potassium permanganate solution is introduced into a as jar of sulphur dioxide.

State one observation for the following Conentrated nitric acid is reacted with - sulphur.

State your observation for the following cases : Ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst.

State your observation in the following case: When calcium hydroxide is heated with ammonium chloride crystals.

State one observation each for the following: Manganese dioxide is heated with conc. HCI.

State your observation in each of the following cases: At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes.

State your observation in the following case : When moist starch iodide paper is introduced into chlorine gas.

State your observation in each of the following cases : (i) When dilute hydrochloric acid is added to sodium carbonate crystals.

State your observation in the following case: When excess sodium hydroxide is added to calcium nitrate solution.