Acids And Bases-1


10 Questions MCQ Test Science Class 10 | Acids And Bases-1


Description
This mock test of Acids And Bases-1 for Class 10 helps you for every Class 10 entrance exam. This contains 10 Multiple Choice Questions for Class 10 Acids And Bases-1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Acids And Bases-1 quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this Acids And Bases-1 exercise for a better result in the exam. You can find other Acids And Bases-1 extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.
QUESTION: 1

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ?

Solution:

As the solution turns red litmus solution blue, it must be basic. To reverse the change, we must add an acid.

QUESTION: 2

NaOH is obtained by electrolysis of

Solution:

2NaCl + 2H2O ------- > 2NaOH + H2 + Cl2

QUESTION: 3

One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is

Solution:

To decompose sodium hydrogencarbonate, we require an acid. Since it is used in food, we use a mild organic acid which is not toxic to human system.

QUESTION: 4

Lime water reacts with chlorine to form

Solution:

Ca(OH)2 + Cl2 → CaOCl2 + H2O

QUESTION: 5

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue ?

Solution:

Only a basic solution will change the colour of pH paper to greenish-blue.

QUESTION: 6

Ag2S reacts with H2S04 to form

Solution:

Ag2S + H2S04 → Ag2S04 + H2S

QUESTION: 7

Which of the following statements are true for acids ?

Solution:

Acids possess sour taste and turn blue litmus paper red.

QUESTION: 8

pH of H20 is

Solution:

pH of H20 is 7 because it is neutral.

QUESTION: 9

Which of the following are present in a dilute aqueous solution of hydrochloric acid ?

Solution:

Hydrochloric acid ionises as follows :
HCl→ H+ +Cl
H+ ions combine with water molecules to form H30+. Therefore, the ions present in dilute aqueous solution of hydrochloric acid are H30+ and Cl-.

QUESTION: 10

NaHC03 formed by reaction of

Solution:

NaOH + H2C03→ NaHC03 + H20

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