HARD
10th CBSE
IMPORTANT
Earn 100

Acetic acid was added to a solid X kept in a test tube. A colourless and odourless gas was evolved. The gas was passed through lime water which turned milky. It was concluded that

50% studentsanswered this correctly

Important Questions on Acids, Bases And Salts

MEDIUM
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 41
A blue litmus paper was first dipped in dil. HCl and then in dil. NaOH solution. It was observed that the colour of the litmus paper
 
MEDIUM
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 42

CuO+X→CuSO4+H2O

Here (X) is

HARD
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 43
Which of the following equilibrium can be described as an acid-base reaction using the Lewis acid-base definition, but not using Bronsted Lowry definition?
HARD
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 44
One molecule of aluminium hydroxide will require how many molecules of dil. HCl for complete neutralisation?
MEDIUM
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 45
While preparing 20% aqueous sodium hydroxide solution in a beaker certain observations are recorded. Which of the following statements are correct ?
I. Sodium hydroxide is in the form of pellets/ flakes.
II. It dissolves in water readily.
III. The beaker appears cold when touched from outside immediately after adding sodium hydroxide to water.
IV. When red litmus paper is dipped into the solution, it turns blue.
MEDIUM
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 46
Breaking apart of the positive and negative ions of a compound in solution is called
HARD
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 47
Iron filings were added to a solution of copper sulphate. After 10 minutes, it was observed that the blue colour of the solution changed and a layer got deposited on iron filings. The colour of the solution and that of the layer would respectively be
HARD
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE>Q 48
100 mL of a 0.1 M CH3COOH is titrated with 0.1 M NaOH solution. The pH of the solution in the titration flask at the titre value of 50 is [pKa(CH3COOH)=4.74]