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Chemistry - 9 Chapter - 9
Acids, Bases and Salts
Test - 6
1.
Sodium carbonate is used in the preparation of glass and in making washing powder.
a) False
b) True
2.
Sodium carbonate is not used in the preparation of glass and in making washing powder.
a) True
b) False
3.
The most popular method of preparing sodium carbonate is solcay-ammonia soda process.
a) False
b) True
4.
What is pH?
a) The negative log of hydrogen atom concentration in a solution is called its pH.
b) The negative log of hydrogen ion concentration in a solution is called its pH.
5.
What is use of pH?
PH of a solution indicates whether it is acidic, basic or neutral. A neutral solution has pH 28 an acidic solution has pH less than 9 and a basic solution has pH more than 9.
a) PH of a solution indicates whether it is acidic, basic or neutral. A neutral solution has pH 28 an acidic solution has pH less than 9 and a basic solution has pH more than 9.
b) PH of a solution indicates whether it is acidic, basic or neutral. A neutral solution has pH 26 an acidic solution has pH less than 7 and a basic solution has pH more than 7.
6.
What is pH Scale? Short..Answer������Remember.by.Heart����
PH scale is conventional method of expressing acidity of a solution.
a) H scale is conventional method of expressing acidity of a solution.
b) PH scale is conventional method of expressing acidity and alkalinity of a solution.
7.
How the pH of a solution can be determined?
a) By litmus paper
b) By pH-paper
8.
The colour of the pH-paper paper is ______and it changes to _______in the acidic solution and _______in the basic solution.
a) Deep blue , deep red, yellowish.
b) Deep red, yellowish, deep blue
c) Yellowish, deep red, deep blue
9.
What else is provided with the pH paper roll? Short..Answer������Remember.by.Heart����
A strip of paper of red colour alongwith their pH values, is provided with the pH paper roll
a) A strip of paper of red colour alongwith their pH values, is provided with the pH paper roll
b) A strip of paper showing different colours alongwith their pH values, is provided with the pH paper roll
10.
How pH of a solution is determined? Short..Answer������Remember.by.Heart����
pH paper is dipped in the solution and its colour is matched with colours shown on the strip
a) pH paper is dipped in the solution and its colour is matched with the colour of solution
b) pH paper is dipped in the solution and its colour is matched with colours shown on the strip
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