Hydrogen Chlori...

An unknown acid, on reaction with silver nitrate solution, gives white precipitates and liberates a greenish-yellow gas when heated with manganese dioxide.
Which of the following can be this unknown acid?

H₂₍g) + Cl₂ (g)   ––> 2 HCl (g)
Which of the following statements is true for this reaction?

Which characteristic of bleaching powder makes it useful as disinfectant and germicide?

_____ + 2HCl ––> ___ Cl₂ + H₂
Which of the following metals can be placed in the blanks in above equation?

An acid on reaction with sodium sulphite releases sulphur dioxide as one of the products, and with sodium bicarbonate forms sodium chloride as one of the products.
Which of the following can be this acid?

Which of the following compounds can be used to purify HCl gas?

Electronegativity of Cl is 3, and electronegativity of H is 2.1. Which of the following statements is true for HCl.

Which of the following statements are true regarding aqua regia?
(i) It produces nascent chlorine, which reacts with noble metals.
(ii) It consists of three parts of concentrated nitric acid and one part of concentrated hydrochloric acid.
(iii) It consists of three parts of conc. hydrochloric acid and one part of concentrated nitric acid.
(iv) It produces nascent oxygen, which reacts with noble metals.

Which of the following statements are true?
(i) A very dilute solution of HCl becomes concentrated on boiling.
(ii) A concentrated solution of HCl becomes dilute on boiling.
(iii) Conc. HCl will change moist litmus from red to blue.
(iv) Conc. HCl will change colour of phenolphthalein to pink.

An unknown gas combines with HCl gas to give dense white fumes. Which of the following can be this gas?