TEST2
Click on the correct answer
1
Which of the following are important uses of sulphur dioxide?
1. As food preservative
2. As a bleaching agent
3.In the manufacture of sulphuric acid
1 and 2
2 and 3
1 and 3
all the options
2
Compound X is a white solid. When X is warmed with sodium hydroxide solution, a gas is evolved which turns moist red litmus blue. When chlorine water is added to an aqueous solution of X, small gas bubbles are given out.
What is X?
potassium chloride
potassium carbonate
ammonium carbonate
ammonium chloride
3
1st statement : The bleaching action of chlorine is only temporary.
2nd statement: Chlorine is a weak oxidizing agent.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
4
1st statement : The pale brown colour of bromine water disappears when it is mixed with sodium sulphite solution.
2nd statement: Sodium sulphite is a bleaching agent.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
5
1st statement : The bleaching action of sulphur dioxide is not permanent.
2nd statement: Sulphur dioxide is only weakly acidic.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
6
Which of the following methods can be used to distinguish between sodium nitrate and ammonium sulphate?
1. Heating each of them with dilute sulphuric acid
2. Heating each of them with sodium hydroxide solution
3. Adding each of them to sodium chloride solution
1 only
2 only
3 only
1 and 2
7
A student heats ammonium chloride with calcium hydroxide. Which of the following statements concerning the gas given out are correct?
1. It can turn moist red litmus paper blue
2. It is very soluble in water
3. It has an unpleasant smell
1 and 2
1 and 3
2 and 3
all the options
8
Which of the following statements concerning the bleaching action of sulphur dioxide are correct?
1. It bleaches in the presence of water
2. It bleaches by reduction
3.Its bleaching action is permanent
1 and 2
1 and 3
2 and 3
all the options
9
Which of the following pairs of substances would undergo chemical reaction when mixed?
1. Chlorine water and sodium iodide solution
2. Bromine water and potassium chloride solution
3.Sodium sulphite solution and bromine water
1 and 2
1 and 3
2 and 3
all the options
10
The following equation represents the reaction of chlorine with dilute sodium hydroxide solution at room temperature :
Cl
2
(g) + 2NaOH(aq) ---> NaCl(aq) + NaClO(aq) + H
2
O(l)
Which of the following statements concerning this reaction is correct ?
Chlorine is oxidized and sodium hydroxide is reduced.
Chlorine is reduced and sodium hydroxide is oxidized.
Chlorine is simultaneously oxidized and reduced.
Sodium hydroxide is simultaneously oxidized and reduced.
11
1st statement : Newspapers gradually turn yellow in air.
2nd statement: Sulphur-containing pollutants are present in air.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
12
Which of the following statements concerning the Contact process is/are correct ?
1. The sulphur dioxide used in the process can be produced by roasting sulphide ores.
2. A gaseous mixture of sulphur dioxide and oxygen in the mole ratio of 1 : 2 is passed into the catalytic conversion chamber.
3. The sulphur trioxide produced is absorbed by water in the absorption tower.
(1) only
(2) only
(1) and (3) only
(2) and (3) only
13
Which of the following properties apply to sulphur dioxide ?
1. It bleaches wet litmus paper.
2. It decolorizes bromine water.
3. It supports the burning of magnesium ribbon.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
14
Cl
2
(aq) + 2I
-
(aq) ---> I
2
(aq) + 2Cl
-
(aq)
Which of the following statements concerning the above reaction are correct ?
1. I
-
(aq) acts as a reducing agent.
2. Chlorine is a stronger oxidizing agent than iodine.
3. The reaction is a displacement reaction.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
15
Chlorine reacts with cold dilute aqueous sodium hydroxide according to the equation :
Cl
2
(g) + 2NaOH(aq) ---> NaClO(aq) + NaCl(aq) + H
2
O(l)
Which of the following statements concerning this reaction is correct ?
Chlorine is oxidized and sodium hydroxide is reduced.
Chlorine is reduced and sodium hydroxide is oxidized.
Chlorine is both oxidized and reduced.
Sodium hydroxide is both oxidized and reduced.
16
A colourless gas X is soluble in water and turns moist blue litmus paper red. X can also decolorize bromine water. X is probably
ethene.
sulphur dioxide.
carbon dioxide.
hydrogen chloride.