Worksheets3. ACIDS, BASES & SALTS - 1.
Total questions: 15
Worksheet time: 8mins
After a compound X was added to water, the pH using indicator paper was less than 7. The resulting solution was added to some calcium carbonate and it was noted that effervescence took place. What could compound X be?
HNO3
MgO
Na2O
CaO
A solution was added to some ammonium chloride then heated. A gas which had a pungent smell and turned moist red litmus blue was produced. Which of the following could have been present in the original solution?
Hydrochloric acid
vinegar
potassium hydroxide
sodium chloride
Which property does hydrochloric acid have?
It liberates ammonia from ammonium salts
It reacts with any base to give a salt
It reacts with any metal to give hydrogen
It turns red litmus paper blue
Which of the following is the best description of a salt?
Forms when two metals react
Forms when a carbonate reacts with sodium hydroxide
Forms when all or part of the hydrogen ions in an acid is replaced
Forms when two alkali reacts
A student was carrying out a test for anions and cations. He added acidified barium nitrate solution to an unknown solution and it remained unchanged. What can be concluded from this?
SO42- was present
Cl- was absent
NO3 – was present
SO42- was absent
A lighted splint was held over a flask in which a gas was given off. The splint went out with a pop. Which gas was given off?
hydrogen
chlorine
oxygen
ammonia
On adding acidified silver nitrate to a solution, a white precipitate was formed which went purple when in sunlight. Which of the following compounds could have been present?
MgBr2
NaI
NaCl
Fe(NO3)2
________________ is an example of an amphoteric oxide
aluminium oxide
carbon dioxide
sulphur dioxide
copper oxide
Which of the following is not a soluble base
sodium oxide
potassium hydroxide
copper oxide
potassium oxide
An acid anhydride
sulphur dioxide
aluminium oxide
zinc oxide
sodium oxide
1. An example of an acidic oxide is:
MgO
CO2
BaO
Na2O
Found in vinegar
acetic acid
sulphuric acid
tartaric acid
carbonic acid
A dibasic acid
sulphuric acid
nitric acid
phosphoric acid
hydrochloric acid
A solution turns red litmus blue ,its pH is likely to be -
1
4
5
10
A solution reacts with crushed egg shells to give a gas that turns lime -water milky.
NaCl
HCl
LiCl
KCl
