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Class 10 Chemistry Chapter 19 Nitrogen and Sulphur Test 1
Grade 10 Chemistry chapter 19 New Syllabus
Prepare for the Punjab Board Class 10 Chemistry Examination 2027 with our Chapter 19: Nitrogen and Sulphur – Class Test 1. This full unit test is designed according to the new Chemistry syllabus issued by PECTAA Punjab and is part of our comprehensive Punjab Board 2027 Model Papers and Chapter-Wise Test Series. Students can use this test to revise important concepts, assess their subject knowledge, improve exam preparation, and practice board-standard questions. Explore our Class 10 Chemistry chapter-wise tests to strengthen your preparation for the 2027 annual examinations.
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ChemistryChapter-19 (Objective)Class Test-1
TIME: 10 MINTOTAL MARKS: 30MARKS: 10
1. Ammonia prepare by:(Q-1)
(a) Lavoisier(b) F. J. Haber(c) Mendeleev(d) Avogadro
Answer: (b) F. J. Haber
2. Catalyst used in the Haber process is:(Q-3)
(a) Cu/ZnO(b) Fe/Al2O3(c) Pt(d) MnO2
Answer: (b) Fe/Al2O3
3. Approximately percentage of ammonia in the equilibrium mixture is obtained in the Haber process is:(Q-5)
(a) 10%(b) 20%(c) 35%(d) 50%
Answer: (b) 20% (approx.)
4. Which catalyst is used in the contact process to convert SO2 to SO3?(Q-10)
(a) Platinum(b) Vanadium (V) oxide(c) Iron (Fe)(d) Copper (Cu)
Answer: (b) Vanadium (V) oxide, V2O5
5. When sulphur trioxide (SO3) is absorbed in 98% sulphuric acid is formed:(Q-12)
(a) H2SO4(b) Oleum(c) Sulphur dioxide(d) SO2 gas
Answer: (b) Oleum (H2S2O7)
6. What is the oxidation state of oxygen in oxides?(Q-14)
(a) +1(b) −1(c) −2(d) +2
Answer: (c) −2
7. Which of these oxides behave as a base in the presence of acids?(Q-19)
(a) CO(b) ZnO(c) SO3(d) NO2
Answer: (b) ZnO (amphoteric oxide)
8. Metals usually form:(Q-22)
(a) Anions(b) Cations(c) Neutral atoms only(d) Molecules
Answer: (b) Cations
9. Which flame color is observed when strontium burns in oxygen?(Q-26)
(a) White(b) Yellow(c) Crimson(d) Green
Answer: (c) Crimson
10. Metals below calcium react with:(Q-31)
(a) Cold water(b) Steam(c) Acids only(d) Oxygen only
Answer: (b) Steam
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ChemistryChapter-19 (Subjective)Class Test-1
TIME: 22 MINMARKS: 20
Attempt any 10 Questions.10×2=20
i. What is the importance of ammonia?(Q-1)
Ammonia is used to make fertilizers (urea, ammonium sulphate, ammonium nitrate), nitric acid, explosives and synthetic fibres like nylon. It is also used as a refrigerant and in cleaning agents.
ii. How is nitrogen separated from oxygen in air?(Q-4)
By fractional distillation of liquid air. Air is compressed, cooled and liquefied. On slow warming, nitrogen (b.p. −196 °C) boils off first, leaving oxygen (b.p. −183 °C).
iii. What is the main industrial method for producing sulphuric acid? Write it’s steps.(Q-6)
Contact process. Steps: (1) Burning sulphur (or roasting pyrites) gives SO2. (2) SO2 is purified and dried. (3) SO2 is oxidised to SO3 over V2O5 catalyst at about 450 °C. (4) SO3 is absorbed in 98% H2SO4 to form oleum. (5) Oleum is diluted with water to get H2SO4.
iv. How SO3 is formed in contact chamber?(Q-9)
Purified SO2 and O2 pass over V2O5 catalyst at 400–450 °C and 1–2 atm:
2SO2 + O2 ⇌ 2SO3 (exothermic)
2SO2 + O2 ⇌ 2SO3 (exothermic)
v. What are oxides? Write its properties.(Q-11)
Oxides are binary compounds of oxygen with another element. Properties: 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 in them.
vi. What are neutral oxides? Give examples.(Q-14)
Oxides that are neither acidic nor basic and do not react with acids or bases. Examples: CO, NO, N2O, H2O.
vii. What is metal? How do metals usually occur in the Earth’s crust?(Q-17)
A metal is an element that loses electrons to form cations; it is lustrous, malleable and a good conductor. Reactive metals occur as compounds (oxides, sulphides, carbonates, chlorides) called ores; least reactive metals (Au, Pt) occur free.
viii. How oxide are formed?(Q-21)
By burning an element in oxygen, e.g. 2Mg + O2 → 2MgO; or by heating carbonates, hydroxides or nitrates, e.g. CaCO3 → CaO + CO2.
ix. How do metals react with dilute acids?(Q-23)
Metals above hydrogen in the reactivity series displace hydrogen, forming a salt:
Mg + 2HCl → MgCl2 + H2↑
Metals like Cu and Ag do not react.
Mg + 2HCl → MgCl2 + H2↑
Metals like Cu and Ag do not react.
x. How least reactive metals react with water?(Q-26)
Least reactive metals (Cu, Ag, Au, Pt) do not react with cold water or steam at all.
xi. What are primary pollutants?(Q-29)
Pollutants emitted directly into the atmosphere from a source, e.g. CO, SO2, NOx, hydrocarbons and particulates.
xii. How is NO produced naturally?(Q-31)
During lightning, the high temperature makes nitrogen and oxygen of air combine:
N2 + O2 → 2NO
N2 + O2 → 2NO
xiii. How does NOx contribute to acid rain?(Q-33)
NO is oxidised to NO2, which dissolves in rain water to form nitric and nitrous acids:
2NO + O2 → 2NO2 ; 2NO2 + H2O → HNO3 + HNO2
2NO + O2 → 2NO2 ; 2NO2 + H2O → HNO3 + HNO2
xiv. What are the harmful effects of acid rain? Write it’s pH.(Q-35)
It damages buildings and statues (marble, limestone), corrodes metals, harms crops and forests, acidifies soil and lakes, and kills aquatic life. Its pH is below 5.6 (usually 4–5).
