WorksheetsSome gases (CO2 and NH3)
Total questions: 15
Worksheet time: 8mins
Question 1:
What is a primary artificial source of carbon dioxide in the atmosphere?
A. Photosynthesis
B. Burning fossil fuels
C. Volcanic eruption
D. Decomposition of organic matter
Question 2:
How is carbon dioxide gas typically prepared in a laboratory setting?
A. Mixing limestone with water
B. Burning magnesium carbonate
C. Reacting calcium carbonate with dilute hydrochloric acid
D. Heating organic matter
Why does a burning matchstick extinguish when exposed to a jar containing carbon dioxide?
A. Carbon dioxide is combustible
B. Carbon dioxide is a supporter of combustion
C. Carbon dioxide reacts with the matchstick
D. Carbon dioxide neither supports nor undergoes combustion
What is the observable change in lime water when carbon dioxide is passed through it?
A. It turns blue
B. It becomes colorless
C. It remains unchanged
D. It changes to milky white
What is the primary chemical used in fire extinguishers that reacts with sodium bicarbonate to produce carbon dioxide?
A. H2O
B. H2SO4
C. Na2SO4
D. CO2
What happens when carbon dioxide reacts with red-hot coke at 900°C?
A. Formation of carbonic acid
B. Production of carbon monoxide
C. Creation of carbohydrates
D. Generation of oxygen
What is the primary weak acid formed from the reaction of carbon dioxide with water?
B) Sulfuric acid (H2SO4)
C) Carbonic acid (H2CO3)
D) Nitric acid (HNO3)
A) Hydrochloric acid (HCl)
What is the chemical reaction involved in the formation of the weak base NH4OH from ammonia (NH3)?
A) 3NH3+O2→2NH4OH3NH3+O2→2NH4OH
B) 2NH3+H2O→NH4OH2NH3+H2O→NH4OH
C) 4NH3→NH4OH+NH4NO34NH3→NH4OH+NH4NO3
D) NH3+CO2+H2O→NH4OHNH3+CO2+H2O→NH4OH
How is ammonia gas produced in nature when nitrogenous substances decay in the absence of oxygen?
A. Formation from carbon dioxide
B. Liberation from ammonium chloride
C. Combination with oxygen
D. Decomposition of nitrogenous substances
Which chemical reaction represents the combustion of ammonia in the presence of oxygen?
A. 4NH3 (g) + 3O2 (g) → 6H2O (l) + 2N2 (g)
B. NH3 (g) + H2O (l) → NH4OH(aq)
C. 2NH3 (g) + 2Na (s) → 2NaNH2 (s) + H2(g)
D. 4NH3 (g) + 5O2 (g) → 6H2O (l) + 2NO (g)
At what temperature does ammonia solidify?
A. -33.4°C
B. 0°C
C. -78°C
D. 25°C
Which gas is used to make blue prints of map?
Carbon dioxide
Ammonia
mixture of both
Oxygen
Which gas is used for manufacturing urea?
Ammonia
Carbon dioxide
Uric acid
Both ammonia and Carbondioxide
What is dry ice ?
A) Solid water (H2O) at low temperatures
B) Solid carbon dioxide (CO2) at low temperatures
C) Frozen oxygen (O2) at room temperature
D) Solid nitrogen (N2) at high temperatures
Which method can help reduce emissions of acid rain precursors from industrial facilities and vehicles?
A) Transition to renewable energy
B) Building more factories
C) Increasing vehicle usage
D) Planting more trees
