Question 3 :
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 strongly acidic?
Question 4 :
If copper sulphate crystals are moistened with water again after removing water of crystallisation, what will be their new colour?
Question 6 :
Complete the following reaction: NaCl + $H_2O$+ $CO_2$ + $NH_3$ → ______ + _________.
Question 7 :
Which salt acts as an important raw material in the production of sodium hydroxide?
Question 8 :
A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains
Question 11 :
Which of the following is not a property of sodium hydrogencarbonate?
Question 14 :
What do you call the large impure salt crystal which contains several salts in it?
Question 15 :
What causes irritation when a person is stung by a bee?
Question 16 :
What is the range in which a compound is said to be basic?
Question 17 :
Which compound can be used to remove hardness of water permanently?
Question 20 :
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCI. If we take 20 mL of the same solution of NaOH, the amount of HCI solution required to neutralise it will be
Question 22 :
Which one of the following type of medicines is used for treating indigestion?
Question 31 :
Complete the following reaction: Metal carbonate/Metal hydrogen carbonate + ______ $\rightarrow$ Salt + ______ +water.
Question 33 :
What is used to measure strength of an acid or a base?
Question 35 :
What happens when excess carbon dioxide is passed through calcium carbonate?
Question 36 :
The reaction of dry slaked lime and chlorine gas gives rise to which important product?
Question 37 :
Which traditional plant is used as a remedy for stinging cause due to nettle leaves?
Question 40 :
Gastric juice has a pH of about 1.2, what can you say about its nature ?
Question 43 :
What type of reaction occurs when an acid reacts with base?
Question 45 :
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 strongly alkaline?
Question 49 :
When the litmus solution is neither acidic nor basic, its colour is _______.