1. Covalent compounds
A. Have high melting and boiling point
B. Are mostly soluble in water
C. Are formed between atoms of metals and non-metals
D. Are formed by the sharing of electrons in the bonding atoms
2. Identify the unsaturated compounds from the following.
(a) Propane
(b) Propene
(c) Propyne
(d) Chloropropane
A. (A) & (B)
B. (B) & (D)
C. (C) & (D)
D. (B) & (C)
3. Which is not correct for isomers of a compound?
A. They differ in physical properties
B. They differ in chemical properties
C. They have same molecular formula
D. They have same structural formula
4. A hydrocarbon should have a minimum of how many carbon atoms to show isomerism?
A. Three
B. Four
C. Five
D. Six
5. The number of isomers of pentane is
A. 2
B. 3
C. 4
D. 5
6. Why does carbon form compounds mainly by covalent bonding?
A. There are four electrons in the outermost shell of carbon.
B. It requires large amount of energy to form C4+ or C4sup>4-.
C. It shares its valence electrons to complete its octet.
D. All the above.
7. Which of the following belongs to homologous series of alkynes?
C6H6, C2H6, C2H4, C3H4.
A. C6H6
B. C2H4
C. C2H6
D. C3H4
8. The substnace not responsible for the hardness of water is
A. Sodium nitrate
B. Calcium hydrogen carbonate
C. Calcium carbonate
D. Magnesium carbonate
9. Which of the following factors contributes to the carbon cycle?
A. Respiration
B. Fossil fuels
C. Photosynthesis
D. All of the above
10. The different types of carbon compounds are _________.
A. Lipids
B. Nucleic acids
C. Carbohydrates
D. All of the above
~ Seminary Classes
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