Which of the following reaction produces hydrogen

(A) Mg + H₂O                                                     (B) BaO₂ + HCl
(C) H₂S₄O₈ + H₂O                                             (D) Na₂O₂ + 2HCl

Ortho and para hydrogen differ in

Which is distilled first

(A) Liquid CO₂                  (B) Liquid N₂                (C) Liquid O₂                        (D) Liquid H₂

Heavy water is

(A) Water containing Fe , Cr , Mn
(B) Water at 0°C
(C) D₂O
(D) Water obtained after a number of distillations

Temporary hardness of water can be removed by

Heavy water is compound of

The reagent commonly used to determine hardness of water titrimetrically is

Which of the following is the best scientific method to test presence of water in a liquid

Which of the following is formed by the action of water on sodium peroxide

(A) H₂                                      (B) N₂                                      (C) O₂                                      (D) CO₂

Which gas is used in acridet water

(A) CO₂                              (B) SO₂                                (C) CO                              (D) Water Vapours

The structure of H₂O₂ is

The oxide that gives hydrogen peroxide (H₂O₂) on the treatment with a dilute acid (H₂SO₄) is

(A) MnO₂                             (B) PbO₂                               (C) Na₂O₂                               (D) TiO₂

Fenton reagent is

(A) FeSO₄ + H₂O₂                                              (B) Zn + HCl
(C) Sn + HCl                                                       (D) None Of the Above

What is the product of the reaction of  with

(A) O₂ + HOCl                         (B) HCl + O₂                        (C) H₂O + HCl                        (D) HCl + H₂

In lab  is prepared by

(A) Cold H₂SO₄ + BaO₂                                                          (B) HCl + BaO₂
(C) Conc. H₂SO₄ + Na₂O₂                                                      (D) H₂ + O₂