Chlorine water loses its yellow colour on standing because:
(a) HCl gas is produced,due to the action of sunlight.
(b) a mixture of `HOCl` and `HCl` is produced in the presence of light
(c) `HOCl` and hydrogen gas is produced
(d) a mixture of `HCl and `ClO_(3)` is produced,due to the action of sunlight

62.5 gm of a mixture of CaCO_(3) and SiO_(2) are treated with excess of HCl and 1.1 gm of CO_(2) is produced. What is mass % CaCO_(3) in the mixture.

Find out the volume of Cl_(2) at STP produced by the action of 100 cm^(3) of 0.2N HCl on excess of MnO_(2) .

Identify the salts Q from the observations given below: When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky. When NH_(4)OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH_(4)OH solution.

When an aqueous solution of a colourless mixture of two salts is treated with a drop of chlorine water, the solution becomes brown. Some chloroform is added to the brown solution and the resulting mixture is shaken wel. The chloroform layer becomes violet. (ii) When chlorine water is again added dropwise to the above mixture, the chloroform layer becomes colourless. (iii) On being heated with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) , the solid mixture gives vapours of a dark colour which form a yellow solution with aqueous NaOH. On acidification with acetic acid followed by treatment with lead acetate, the yellow solution gives a yellow precipitate. (iv) When boiled with an NaOH solution, the mixture gives a gas that produces thick white fumes with HCl vapours and turns nessler's reagent brown. the mixture does not respond to any other test for cations. (v) The mixture, on being heated, gets completely sublimed. Q. The brown solutin obtained in (i) is due to:

When an aqueous solution of a colourless mixture of two salts is treated with a drop of chlorine water, the solution becomes brown. Some chloroform is added to the brown solution and the resulting mixture is shaken wel. The chloroform layer becomes violet. (ii) When chlorine water is again added dropwise to the above mixture, the chloroform layer becomes colourless. (iii) On being heated with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) , the solid mixture gives vapours of a dark colour which form a yellow solution with aqueous NaOH. On acidification with acetic acid followed by treatment with lead acetate, the yellow solution gives a yellow precipitate. (iv) When boiled with an NaOH solution, the mixture gives a gas that produces thick white fumes with HCl vapours and turns nessler's reagent brown. the mixture does not respond to any other test for cations. (v) The mixture, on being heated, gets completely sublimed. Q. Which of the following reactions takes place in (ii) ?

It we see the reaction of methane with halogen, the rate determining step for chlorination is, endothermic reaction of the chlorine atom with methane to form methyl radical and a molecule of HCl. So free radical is the intermediate of the reaction. Formation of free radical depends upon the energy required to break a bond between a hydrogen atom and a carbon atom. Chlorination of propane and Bromination of propane. when compared it is found that bromination is more selective than chlorination. The probability factor for 3^(@),2^(@),1^(@)H atom is 5.0:3.8:1.0 at 25^(@)C for chlorination. Isobutane when reacts with chlorine in presence of ultra violet radiations yield 2 products primary hydrogen substituted and 3^(@) hydrogen substituted Find their % in product mixture

Statement-1: Sodium silicate is called water glass. Statement-2:Salts of lead are poisonous in nature. Statement-3: Producer gas is a mixture of CO and N.

20 gm of a chalk sample is dissolved completely in excess of dilute HCl solutions. If 3.36 L CO_(2) gas is produced at 273 K and 1 atm, the percentage of pure CaCO_(3) in chalk is (assume that the impurities are inert to HCl and CO_(2) is completely insoluble in water)

Chlorine gas can be produced by the reaction of HCl (aq) with MnO_(2) (s) . Only MnCl_(2) and H_(2)O(l) are the by products. What volume of Cl_(2) (g) ("in litre") of density 2.84 g//L will be produced from the reaction of 400 mL of 0.1 M HCl(aq) with an excess of MnO_(2) ?

Identify the salts P & Q from the observations given below: i] On performing the flame test salt P produces a lilac coloured flame & its solution gives a white precipitate with silver nitrate solution, which is soluble in ammonium hydroxide solution. ii] When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky. When NH_4 OH solution is added to the above mixture [after adding dilute HCI], it produces a white precipitate which is soluble in excess NH_4OH solution.