Class 11 Chemistry · Chapter 12 · Test 1
Nitrogen and Sulfur
44 MCQ test checks your understanding of the reactivity of nitrogen and the properties and preparation of ammonia.
44 questions · 30 min · 44 marks
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Sample questions
The first 5 of 44. Try each one, then tap to see the answer.
Question 1
A student heats a solid ammonium salt with a solution of a strong alkali. The gas produced turns damp red litmus paper blue and has a characteristic pungent smell. The gas is:
- AHydrogen (H2)
- BCarbon dioxide (CO2)
- CAmmonia (NH3)
- DSulfur dioxide (SO2)
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Answer: C
Heating an ammonium salt with a base releases ammonia gas which has a pungent smell and turns moist red litmus blue.
Question 2
The shape of ammonium is:
- APyramidal
- BTriangular planar
- CTetrahedral
- DLinear
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Answer: C
When nitrogen uses its lone pair to form ammonium the ion adopts a tetrahedral shape with all bonds equal.
Question 3
In a catalytic converter the conversion of nitrogen oxides (NOx) into nitrogen gas is a process of:
- AOxidation
- BReduction
- CCombustion
- DNeutralization
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Answer: B
NO is converted into N2 by gaining electrons (e.g. 2NO + 2CO -> N2 + 2CO2 over Pt/Rh) so nitrogen is reduced.
Question 4
PAN formation starts when ______ reacts with the hydrocarbon.
- ANO
- BNO2
- CO3
- DHO•
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Answer: C
Ozone is the main component of oxidizing smog and it oxidizes the hydrocarbon to produce an aldehyde which leads on to PAN.
Question 5
Nitrification is the process by which:
- AAtmospheric nitrogen is converted into ammonia
- BNitrate is converted into nitrogen gas
- CAmmonia is converted into nitrite and then nitrate
- DOrganic nitrogen is converted into ammonia
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Answer: C
Nitrification is the conversion of ammonium into nitrite and nitrate. The reverse conversion of nitrate into N2 is denitrification.
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