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2. The atomic number of carbon is
A. 4
B. 5
C. 6
D. 8
3. Carbon achieves noble gas configuration by
A. Losing 4 electrons
B. Gaining 4 electrons
C. Sharing 4 electrons
D. Transferring 2 electrons
4. The bond formed by sharing of electron pairs is called
A. Ionic bond
B. Covalent bond
C. Metallic bond
D. Hydrogen bond
5. The molecule of oxygen contains
A. Single bond
B. Double bond
C. Triple bond
D. No bond
6. Nitrogen molecule contains
A. Single bond
B. Double bond
C. Triple bond
D. Quadruple bond
7. Methane has the formula
A. CH₄
B. C₂H₆
C. C₂H₄
D. CH₃OH
8. In diamond, each carbon atom is bonded to
A. Two carbon atoms
B. Three carbon atoms
C. Four carbon atoms
D. Six carbon atoms
9. Graphite is a good conductor of electricity because
A. It has ions
B. It has free electrons
C. It has covalent bonds
D. It has weak forces
10. The first fullerene discovered was
A. C-20
B. C-40
C. C-60
D. C-80
11. The property of carbon to form long chains is called
A. Tetravalency
B. Catalysis
C. Catenation
D. Substitution
12. Compounds with only single bonds are called
A. Unsaturated
B. Saturated
C. Aromatic
D. Cyclic
13. Compounds with double or triple bonds are called
A. Saturated
B. Unsaturated
C. Aromatic
D. Heteroatomic
14. Structural isomers have
A. Same molecular formula, different structures
B. Same structure, different formula
C. Same properties, different formula
D. Different atoms, same bonds
15. Cyclohexane has the formula
A. C₆H₁₂
B. C₆H₆
C. C₄H₁₀
D. C₂H₆
16. Benzene has the formula
A. C₆H₆
B. C₆H₁₂
C. C₄H₁₀
D. C₂H₂
17. Alkanes are
A. Saturated hydrocarbons
B. Unsaturated hydrocarbons
C. Aromatic compounds
D. Functional groups
18. Alkenes contain
A. Single bonds only
B. One or more double bonds
C. One or more triple bonds
D. No bonds
19. Alkynes contain
A. Single bonds
B. Double bonds
C. Triple bonds
D. Aromatic rings
20. —OH group represents
A. Ketone
B. Aldehyde
C. Alcohol
D. Carboxylic acid
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