MCQs For Chemical Reactions and Equations Part-III

Silver chloride turns yellow in sunlight to form silver metal

Action of heat on ferrous sulphate is an example of decomposition reaction.

Reduction is the loss of oxygen or gain of hydrogen.

Assertion : Brown fumes are produced when lead nitrate is heated.

Reason : Nitrogen dioxide gas is produced as a byproduct due to the decomposition of lead nitrate.

Which of the following information about the reaction of CaO with water is not true?

When zinc granules are dipped in blue coloured copper sulphate solution, the colour of solution obtained is?

In ferrous sulphate, the valency of iron is

On adding zinc granules to freshly prepared ferrous sulphate solution a student observes that?

On heating ferrous sulphate crystals, one would get ?

The solid residue obtained on heating ferrous sulphate in a glass tube is?

An iron nail is placed in a solution of copper sulphate. The nail is taken out after 10 minutes. The nail will be found to be covered with

The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of ?

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to

(i) the formation of silver by decomposition of silver chloride

(ii) sublimation of silver chloride

(iii) decomposition of chlorine gas from silver chloride

(iv) oxidation of silver chloride

What happens when copper rod is dipped in iron sulphate solution?

A reddish brown coloured metal used in electric wires, when powdered and heated strongly in an open China dish, its colour turns black. When hydrogen gas is passed over this black substances, it regain its original colour. Based on this information, the metal and black coloured substances are _______?

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?

The reaction in which two compounds exchange their ions to form two new compounds is ?

Black and white photography uses?

Which of the following are exothermic processes?

(i) Reaction of water with quick lime

(ii) Dilution of an acid

(iii) Evaporation of water

(iv) Sublimation of camphor (crystals)

White silver chloride in sunlight turns in to _________ Color ?

A substance which oxidises itself and reduces other is known as ?

Which of the following statements about the given reaction are correct? 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)
(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as oxidising agent

A redox reaction is one in which ?

When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction is SO2 + 2H2S → 2H2O + 3S Here hydrogen sulphide is acting as _____?

The following reaction is an example of a 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
(i) displacement reaction
(ii) combination reaction
(iii) redox reaction
(iv) neutralisation reaction

Powdered CaCO3 reacts more rapidly than flaky CaCO3 because of ___________?

A balanced chemical equation is in accordance with?