Acids, Bases And Salts - SEC 4 Nt
Simple questions on acids, bases ans salts for Sec 4 NT level.
- 1.
What does this hazard symbol mean?- A.
Corrosive
- B.
Irritant
- C.
Harmful
- 2.Which of these acids is most likely to be dangerous?
- A.
Citric acid
- B.
Carbonic acid
- C.
Hydrochloric acid
- 3.What happens to litmus paper in acidic solutions?
- A.
Red litmus turns blue
- B.
Blue litmus turns red
- C.
Yellow litmus turns green
- 4.Universal indicator solution is usually green to begin with. What does this mean?
- A.
It is acidic
- B.
It is alkaline
- C.
It is neutral
- 5.A liquid has a pH of 7.5 - what does this mean?
- A.
It is weakly acidic
- B.
It is weakly alkaline
- C.
It is neutral
- 6.A liquid has a pH of 1 - what does this mean?
- A.
It must be sodium hydroxide solution
- B.
It is strongly acidic
- C.
It is weakly acidic
- 7.What products are formed when a carbonate reacts with an acid?
- A.
A salt only
- B.
A salt and water
- C.
A salt, water and carbon dioxide
- D.
A salt and hydrogen
- 8.What products are formed when a metal reacts with an acid?
- A.
A salt and hydrogen
- B.
A salt, water and carbon dioxide
- C.
A salt and water
- D.
A salt only
- 9.Farmers use lime to neutralise their soils. What sort of substance is lime?
- A.
A base
- B.
An acid
- C.
A sharp tasting drink
- 10.Which gas is produced when magnesium reacts with hydrochloric acid?
- A.
Carbon dioxide
- B.
Oxygen
- C.
Hydrogen
- D.
Ammonia
- 11.Which gas is produced when calcium carbonate reacts with hydrochloric acid?
- A.
Oxygen
- B.
Hydrogen
- C.
Ammonia
- D.
Carbon dioxide
- 12.Which gas is produced when ammonium nitrate reacts with sodium hydroxide?
- A.
Nitrogen
- B.
Hydrogen
- C.
Ammonia
- D.
Oxygen
- 13.Neutralisation is the process in which
- A.
Acid react with salt
- B.
Alkali react with water
- C.
Acid react with alkali
- D.
Alkali react with base
- 14.When unknown substance X react with acid, it release a gas which produces a "pop" sound with a burning splint. What type of substance does X belongs to?
- A.
Alkali
- B.
Carbonate
- C.
Ammonium salts
- D.
Metal
- 15.When unknown substance Y react with acid, it release a gas which turns limewater chalky. What is the gas produced?
- A.
Oxygen
- B.
Hydrogen
- C.
Ammonia
- D.
Carbon dioxide
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