Question 3 :
In which of the following conditions, no $H^+$ ions will be separated from Hydrochloric acid?
Question 6 :
Gastric juice has a pH of about 1.2, what can you say about its nature ?
Question 13 :
Complete the following reaction: _____ + Metal → Salt + _____ gas.
Question 16 :
What is the range in which a compound is said to be basic?
Question 23 :
What is the colour of impure salt crystals found across the world?
Question 24 :
Which of the following is a correct representation of hydroxide ions?
Question 25 :
What can be caused with too much acid in our stomach?
Question 26 :
What is the range of pH in which our body works?
Question 27 :
What happens to the stain of curry on a white cloth when soap(basic in nature) is scrubbed on it ?
Question 28 :
What causes irritation when a person is stung by a bee?
Question 29 :
Coloured petals of various flowers like _____ and _____ are also indicators.
Question 30 :
What is formed when electricty is passed through aqueous solution of sodium chloride?
Question 32 :
Name the sodium compound which is used for softening hard water.
Question 34 :
A solution reacts with crushed egg shells to give a gas that turns lime water milky. The solution contains _____.
Question 37 :
When the litmus solution is neither acidic nor basic, its colour is _______.
Question 40 :
What can be used as a remedy to acidity in stomach?
Question 41 :
What is the colour of copper sulphate crystals when water of crystallisation is removed?
Question 47 :
Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. Which solution is weakly acidic?