Chemistry Class 9 Chapter 1 mcqs Federal Board
Fundamentals of Chemistry Important MCQs
FBISE 9th Class MCQs
1. There are———–known elements.
A. 101
B. 109
C. 118
D. 126
ANSWER.C
2. Atoms or groups of atoms with unpaired electrons are known ………..
A.compounds
B.mixture
C.molecules
D.free radicals
ANSWER.D
Continue Reading Free radicals
3. A gas contains ————-molecules per mole.
A. 6.022×10²³
B. 6×1024
C. 5.3×1024
D. 9×1027
ANSWER.A
4. A gas possesses ——- —-molecules in two moles.
A. 1.2×1024
B. 12×1023
C. Both
D.None of them
ANSWER. C
5. Rockets use—- gas for fuel.
A. Chlorine
B. hydrogen
C. Helium
D. Neon
ANSWER.B
6. The primary ingredient in toothpaste is ——————-
A. NaOH
B.NaHCO3
C. Na2CO3
D. H2O
ANSWER. B
7. The simplest ratio of elements in a formula is given by——- ——
A. Empirical formula
B. Molecular formula
C. Formula Unit
D. Atomic Number
ANSWER. A
8. The number of moles in 60 grams of carbon
A. 5
B. 6
C. 7
D. 10
ANSWER. A
9. The relative atomic mass in grams is ———-
A. Mole
B. Formula Unit
C. Candela
D. Tesla
ANSWER. A
10. One mole of water weighs —————–
A.36g
B.48g
C.18g
D.88g
ANSWER.C
11. Mixture of salt and water is
A. Homogeneous
B. Heterogeneous
C. Colloidal
D. Nil
ANSWER. A
12. —————- elements were discovered till 1974
A.107
B.105
C.119
D.123
ANSWER.B
13. ————- cannot be decomposed into simpler substances
A. Compound
B. Solution
C. Element
D. Mixture
ANSWER. C
14. Which of the following is a compound
A. Carbon
B. Salt
C. Argon
D. Iron
ANSWER.B
15. The valency of oxygen atom is
A. 6
B. 2
C. 4
D. 16
ANSWER. B
16. Proton number of Carbon is—————
A.7
B.6
C.9
D.5
ANSWER.B
17. Neutrons carry a ———— charge
A. +
B. –
C. No charge
D. Double Positive
ANSWER. C
18. Hydrochloric Acid is a —— molecule
A. Homoatomic
B. Heteroatomic
C. Monoatomic
D. None of the above
ANSWER. B
19. The relation between atomic number [z] and atomic mass is given by
A. A=Z+N
B. A=Z-N
C. A=Z
D. 2Z-N
ANSWER. A
20. One oxygen atom is —- times heavier than hydrogen
A. 12
B. 16
C. 22
D. 32
ANSWER. B
21. Which of the following is a triatomic molecule————-
A. HCl
B. H20
C. BF3
D. CCl4
ANSWER. B
22. The unit of relative atomic mass is————–
A. amu
B. KJ/mol
C. Both
D. None of these
ANSWER. A
23. The amount of matter contained in a body is called its—————–
A. Mass
B. weight
C. Molecule
D. Atom
ANSWER. A
24. The molar mass of NaHCO3 is————
A. 84g
B. 44g
C. 40g
D. 66g
ANSWER.A
25. Molar mass of CaCO3 is———–
A. 100g
B. 96g
C. 64g
D. 52g
ANSWER. A
26. Mixtures are of ———- types
A. 3
B. 8
C. 2
D. 6
ANSWER. C
27. ——— is a charged specie
A. Ion
B. Molecule
C. Atom
D. None of the above
ANSWER. A
28. Which one is an example of a heterogeneous mixture——–?
A. Sand in water
B. Salt in water
C. Both
D. None
ANSWER. A
29. Alphabet ————–is used to represent the atomic number
A. C
B. Z
C. V
D. P
ANSWER. B
30. Usually an atom contains —–number of protons and electrons
A. Equal
B. Unequal
C. Cannot be determined
D. Unknown
ANSWER. A
31. The symbol used to denote tin is———-
A. Sn
B. O
C. F
D. U
ANSWER. A
32. The percentage of Ca in CaCO3 is———
A. 35%
B. 40%
C. 55%
D. 67%
ANSWER. B
33. The number of neutrons can be determined by—————–
A. X-Z
B. A-Z
C. V-B
D. X-A
ANSWER. B
34. The empirical formula of glucose is—————
A. CH20
B. C6H6
C. H20
D. V2O5
ANSWER. A
35. The empirical formula of hydrogen peroxide is———-
A. H2O2
B. KO2
C. TI2O5
D. HO
ANSWER. D
36. Benzene is a —– molecule
A. Heteroatomic
B. Homoatomic
C. Both
D. None
ANSWER. A
37. Number of naturally occurring elements is—–
A. 87
B. 99
C. 92
D. 55
ANSWER. C
38. The smallest unit of an ionic compound is ——
A. Ion
B. Electron
C. Both
D. None
ANSWER. A
39. Which one of the following discovered Avogadro number
A. Marie Curie
B. Amadeo Avagadro
C. Tesla
D. Charles Darwin
ANSWER. B
40. Which of the following are more electronegative—————
A. Metals
B. Non-metals
C. Metalloids
D. None
ANSWER. B
41. Noble gases have the most —— electronic configuration
A. Unstable
B. Stable
C. Both
D. None
ANSWER. B
42. Which of the following is the most abundant gas in the atmosphere ————–
A. Nitrogen
B. Oxygen
C. Helium
D. Hydrogen
ANSWER. A
43. Percentage of nitrogen gas in the atmosphere is——————
A. 78%
B. 56%
C. 44%
D. 87%
ANSWER. A
44. Mass of one mole of NaCl is————–
A. 55g
B. 57.5g
C. 87g
D. 43g
ANSWER. B
45. The number of moles in 54g of water is——————–
A. 5
B. 3
C. 7
D. 9
ANSWER. B
46. The chemical formula of methane is
A. CH2
B. CH3
C. CH4
D. C2H6
ANSWER. C
47. The percentage composition of C in CH4 is
A. 67%
B. 88%
C. 75%
D. 34%
ANSWER. C
48. One mole of oxygen atom is—————–
A. 32g
B. 18g
C. 16g
D. 19g
ANSWER. C
49. Mass of 1 mole of Benzene is—-
A. 88g
B. 78g
C. 98g
D. 54g
ANSWER. B
50. 92g of nitrogen dioxide contains —–mole
A. 4
B. 2
C. 7
D. 8
ANSWER. B
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