Reaction of dilute HCl with maltose gives?

Which of the following will be able to react with dilute HCl to give hydrogen gas?

Barium sulphate on fusion charcoal and sodium carbonate yields a compound (X).(X) on reaction with dilute HCl liberates a gas (Y) . The gas (Y) can be identified by :

Write the equations for the reaction of dilute nitric acid with copper.

Statement-1 :A solution of BiCl_(3) in concentrated HCl when diluted with water gives white precipitate. Statement-2 : BiCl_(3) forms insoluble BiO^(+)Cl^(-) when diluted with a large quantity of water.

State your observation : Dilute HCl is added to sodium carbonate crystals.

Reaction of zinc with cold and dilute nitric acid yields

Reaction of an inorganic sulphite X with dilute H_(2)SO_4) generates compound Y . Reaction of Y with NaOH gives X . Further , the reaction of X and Y and water affords compound Z . Y and Z respectively are :

Pentene-1 with HCl gives

A : Cl_(2) on reaction with NaOH (cold and dilute) gives NaClO_(3) . R : Cl_(2) get oxidized only in this reaction .

Alkanline earth metal nitrate (A) on heating decompose, leaving a solid residue (B) which goes into solution with dilute HCI . The solution of (B) gives a white precipitate (C ) is dissolved in dilute HCl and the solution is treated with potassium chromae to get yellow precipitate (D) . The solution (B) with dilute H_(2)SO_(4) also gives a white precipitate (E) insoluble in diute HCl and nitric acid. the precipitate (E) is a part of a white pigment lithopone. The compound (E) is