EASY
10th CBSE
IMPORTANT
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When a few drops of universal indicator were added to a dilute solution of HCI, it is observed that the colour of the solution changes from

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Important Questions on Acids, Bases and Salts

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 68
A student was given three samples containing hydrochloric acid, sodium bicarbonate solution and water in test-tubes l, Il and III respectively. On dipping a pH paper in them, he observed that the colour turned orange in I, blue in Il, and green in Ill. If arranged in increasing order of their pH it would be :
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 69
Dilute hydrochloric acid is added to sodium carbonate. It is observed that:
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 70
On putting a few drops of a liquid on a pH strip, the colour of pH strip changed to green. The liquid is most probably.
HARD
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 71
Which of the following chemical properties are shown by dilute hydrochloric acid? 
(i) turns blue litmus red 
(ii) turns red litmus blue 
(iii) reacts with zinc and a gas is evolved 
(iv) reacts with solid sodium carbonate to give brisk effervescence.
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 72

Two test tubes containing 2 mL of dilute HCI are taken. Zinc granules are added to test tube (A) and solid sodium carbonate is added to test tube (B) as shown. 

Question Image

The correct observation would be:

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 73
10 ml of HCI and 10 ml of NaOH solutions are taken in two separate beakers labelled I and Il respectively. On adding zinc granules to both, it is observed that at room temperature :
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 74
The correct method of finding pH of the solution is to:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 2 - Acids, Bases and Salts>Value Based Questions>Q 75
On putting a few drops of an unknown liquid on the pH strip, the colour of the pH strip is changed to violet. This liquid taken is likely to be :