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Class 10 Chemistry Chapter 19 Nitrogen and Sulphur Test 2
Grade 10 Chemistry Chapter 19 Test 2
Prepare for the Punjab Board Class 10 Chemistry Examination 2027 with Chapter 19: Nitrogen and Sulphur – Class Test 2. This full unit test is part of our comprehensive Class 10 Chemistry Chapter-Wise Test Series, designed to help students revise important concepts and assess their preparation. Based on the new syllabus issued by PECTAA Punjab, these Punjab Board 2027 Model Papers support students in strengthening their Chemistry knowledge, practicing examination-style questions, and preparing effectively for the annual board examinations. Attempt this Chapter 19 Chemistry test to evaluate your understanding of Nitrogen and Sulphur and improve your exam readiness.
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ChemistryChapter-19 (Objective)Class Test-2
TIME: 10 MINTOTAL MARKS: 30MARKS: 10
1. Ratio of nitrogen to hydrogen used in the Haber process is:(Q-2)
(a) 1:1(b) 1:2(c) 1:3(d) 3:1
Answer: (c) 1:3
2. At what temperature does ammonia liquefy in the industrial process?(Q-4)
(a) 0 °C(b) −33.4 °C(c) −196 °C(d) 100 °C
Answer: (b) −33.4 °C
3. Nitrogen evaporates at:(Q-7)
(a) −194°C(b) −196°C(c) −198°C(d) −192°C
Answer: (b) −196°C
4. At what temperature and pressure is the contact process carried out?(Q-11)
(a) 200 °C and 1 atm(b) 450 °C and 2–3 atm(c) 500 °C and 5 atm(d) Room temperature and 1 atm
Answer: (b) 450 °C and 2–3 atm
5. Binary compounds of elements with oxygen are called:(Q-13)
(a) Peroxides(b) Oxides(c) Hydroxides(d) Acids
Answer: (b) Oxides
6. Example of a neutral oxide is(Q-17)
(a) CO2(b) ZnO(c) CO(d) SO3
Answer: (c) CO
7. Nearly three-fourth of the elements in the periodic table are:(Q-21)
(a) Non-metals(b) Metals(c) Metalloids(d) Noble gases
Answer: (b) Metals
8. Beryllium and aluminum react with steam at:(Q-25)
(a) Room temperature(b) 600 °C(c) 700 °C(d) 400 °C
Answer: (b) 600 °C (verify with your textbook)
9. Which of the following metals is the most reactive according to the reactivity series?(Q-29)
(a) Li(b) Na(c) K(d) Ca
Answer: (c) K (Potassium)
10. How does reducing ability change down the reactivity series?(Q-33)
(a) Increases(b) Decreases(c) Remains the same(d) Becomes unpredictable
Answer: (b) Decreases
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ChemistryChapter-19 (Subjective)Class Test-2
TIME: 22 MINMARKS: 20
Attempt any 10 Questions.10×2=20
i. Write Haber process.(Q-2)
Nitrogen and hydrogen (1:3) are combined over an iron catalyst (with Al2O3 promoter) at about 450 °C and 200–250 atm:
N2 + 3H2 ⇌ 2NH3 ΔH = −92 kJ
Ammonia is liquefied at −33.4 °C and removed; unreacted gases are recycled.
N2 + 3H2 ⇌ 2NH3 ΔH = −92 kJ
Ammonia is liquefied at −33.4 °C and removed; unreacted gases are recycled.
ii. What is the product obtained when CO and water can react?(Q-5)
Carbon dioxide and hydrogen are produced:
CO + H2O → CO2 + H2
CO + H2O → CO2 + H2
iii. How SO2 purified?(Q-8)
The gas is passed through dust chambers/electrostatic precipitator to remove dust, washed with water to remove soluble impurities, then dried with concentrated H2SO4. Impurities such as arsenic compounds are removed because they poison the catalyst.
iv. What are oxides? Write its properties.(Q-10)
Oxides are binary compounds of oxygen with another element. Metal oxides are generally basic and ionic; non-metal oxides are generally acidic and covalent; some are amphoteric (ZnO, Al2O3) or neutral (CO, NO). Oxygen shows oxidation state −2.
v. What are amphoteric oxides? Give examples.(Q-15)
Oxides that react with both acids and bases to form salt and water. Examples: Al2O3, ZnO, BeO, PbO, SnO.
vi. How Al2O3 behave as a amphoteric?(Q-16)
As a base with acid: Al2O3 + 6HCl → 2AlCl3 + 3H2O
As an acid with base: Al2O3 + 2NaOH → 2NaAlO2 + H2O
As an acid with base: Al2O3 + 2NaOH → 2NaAlO2 + H2O
vii. How does magnesium react with cold water?(Q-19)
Very slowly, forming magnesium hydroxide and hydrogen:
Mg + 2H2O → Mg(OH)2 + H2↑
Mg + 2H2O → Mg(OH)2 + H2↑
viii. Write the reaction of Beryllium with steam.(Q-20)
Be + H2O(steam) → BeO + H2↑ (at high temperature)
ix. Which and how metal show flame property?(Q-22)
Alkali and alkaline earth metals (s-block). Their electrons are excited by the flame and emit visible light when they fall back. Colours: Li crimson red, Na golden yellow, K lilac, Ca brick red, Sr crimson, Ba apple green.
x. What is the reactivity series of metals?(Q-24)
Arrangement of metals in decreasing order of reactivity:
K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Ag > Au
K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Ag > Au
xi. Why are metals at the top of the reactivity series called strong reducing agents?(Q-28)
They lose electrons very easily and so readily reduce other substances, while being oxidised themselves.
xii. What are secondary pollutants?(Q-30)
Pollutants formed in the atmosphere by reactions of primary pollutants, e.g. ozone, PAN, sulphuric acid, nitric acid and smog.
xiii. Name the main man-made sources of NOx.(Q-32)
Vehicle exhaust, power stations, industrial furnaces and other high-temperature fuel burning.
xiv. How NOx convert sulphur dioxide into sulphuric acid?(Q-34)
NO2 oxidises SO2 to SO3, which dissolves in water:
NO2 + SO2 → SO3 + NO ; SO3 + H2O → H2SO4
NO is re-oxidised to NO2 by oxygen, so it acts like a catalyst.
NO2 + SO2 → SO3 + NO ; SO3 + H2O → H2SO4
NO is re-oxidised to NO2 by oxygen, so it acts like a catalyst.
