A gas which turns lead acetate paper black.

Two inorganic compounds A and B were heated in a dry test tube. A evolved a colourless gas which turned lead acetate paper black and B evolved a gas which turned lime water milky. The anions in A and B respectively are :

Componds (A) and B are treated with dilute HCl separately. The gases liberated are Y and Z respectively. Y turns acidified K_2 Cr_2 O_7 paper green while Z turns lead acetate paper black. The compounds A and B are respectively :

A gas which turns lead acetate solution black.

Match the Following : {:(" Column I"," Column II"),(" (Addition of dil. HCl/dil "H_(2)SO_(4)")"," (Observation)"),("(A) "S_(2)O_(3)^(2-),"(p) Gas evolved turns lime water milky"),("(B) "SO_(3)^(2-),"(q) Gas turns lead acetate paper black"),("(C) "CO_(3)^(2-),"(r) Gas turns acidified "K_(2)Cr_(2)O_(7)" solution green"),("(D) "S^(2-),"(s) Gives white turbidity"):}

Identify (A),(B),(C ),(D) and (E ), (A) (black) + dil HCI overset(Delta) to (B) (solution) + (C ) (gas) ( C) turns lead aceetain paper black , (B) gives orange ppt (D ) solution in excess of KI forming (E ).

Greenish yellow gas which turns starch iodide paper black.

State the inference drawn from the following observations : A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State the inference drawn from the following observations: A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State the inference drawn from the following observation: A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

The gas which turns mercurous nitrate paper black is