1. A key component of photochemical smog formed from NO, NO₂ and unburned hydrocarbons is
Answer: B. peroxyacetyl nitrate (PAN)
Chemistry Class 10 Unit 7: Nitrogen, Sulphur and Metals MCQs
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2. PAN stands for
Answer: D. peroxyacetyl nitrate
3. The oxides of nitrogen involved in photochemical smog are
Answer: C. NO and NO₂
4. In sunlight, NO₂ undergoes photodissociation to form NO and
Answer: A. an oxygen atom
5. Acid rain is rain having a pH less than
Answer: B. 5
6. Acid rain is caused mainly by dissolving of SO₂ and ______ in rainwater.
Answer: A. NO₂
7. In the formation of acid rain, NO₂ acts as a ______ in the oxidation of SO₂.
Answer: D. catalyst
8. SO₃ reacts with water vapour to form
Answer: C. sulphuric acid
9. The Contact process is used for the manufacture of
Answer: D. sulphuric acid
10. The Contact process is based on the catalytic oxidation of
Answer: A. SO₂ to SO₃
11. The balanced equation of the key step in the Contact process is
Answer: C. 2SO₂ + O₂ ⇌ 2SO₃
12. In the Contact process, sulphur dioxide is produced by burning sulphur or
Answer: B. roasting sulphide ores
13. The catalyst used in the Contact process is
Answer: D. vanadium(V) oxide
14. The typical temperature for the Contact process is
Answer: A. 450 °C
15. The Contact process reaction is
Answer: C. reversible and exothermic
16. In the Contact process, SO₃ is absorbed in 98 % H₂SO₄ to give
Answer: B. oleum (H₂S₂O₇)
17. The Haber process is used to manufacture
Answer: A. ammonia
18. The balanced equation for the production of ammonia is
Answer: B. N₂ + 3H₂ ⇌ 2NH₃
19. What are the sources of hydrogen and nitrogen in the Haber process?
Answer: C. Methane and air
20. The catalyst used in the Haber process is
Answer: D. iron
21. The temperature typically used in the Haber process is
Answer: C. 450 °C
22. The pressure typically used in the Haber process is about
Answer: B. 200 atm
23. The boiling point of ammonia is about
Answer: D. −33 °C
24. Binary compounds of elements with oxygen are called
Answer: A. oxides
25. Acidic oxides are generally oxides of
Answer: D. non-metals
26. Which of the following is an acidic oxide?
Answer: C. SO₂
27. SO₂ reacts with water to form
Answer: A. sulphurous acid (H₂SO₃)
28. Basic oxides are generally oxides of
Answer: B. metals
29. Which of the following is a basic oxide?
Answer: B. CaO
30. Amphoteric oxides react with
Answer: D. both acids and bases
31. Which of the following oxides is amphoteric?
Answer: C. Al₂O₃
32. Atmospheric oxides react with acids and bases to form
Answer: A. a salt and water
33. Metals react with dilute acids to form a salt and
Answer: A. hydrogen gas
34. Which metals do not react with dilute acids?
Answer: B. Copper, silver and gold
35. Which metals react vigorously with cold water?
Answer: D. Potassium, sodium and calcium
36. Which metal does NOT react with steam?
Answer: C. Copper
37. The correct order of decreasing reactivity is
Answer: D. K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Ag > Au
About Chemistry Class 10 Unit 7 MCQs (Federal Board)
These 37 Chemistry MCQs cover Class 10 Unit 7: Nitrogen, Sulphur and Metals of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. You can also read the Nitrogen, Sulphur and Metals notes for this chapter. Download the Nitrogen, Sulphur and Metals MCQs as a PDF using the button at the top of this page.