1. What is the characteristic odour of many lower haloalkanes?
A.
Sweet smell
B.
Fishy smell
C.
Burnt smell
D.
Garlic-like smell
Correct Answer:
Sweet smell
Explanation:
Many lower haloalkanes are known for having a characteristic sweet odour.
2. Which description best applies to the odour of lower haloalkanes?
A.
They generally have a sweet odour
B.
They always have no odour
C.
They generally smell like ammonia
D.
They have a strong rotten-egg smell
Correct Answer:
They generally have a sweet odour
Explanation:
The characteristic odour of lower haloalkanes is generally described as sweet.
3. Chloroform is commonly described as having which type of odour?
A.
Sweet odour
B.
Pungent onion-like odour
C.
Rotten-egg odour
D.
Odour of vinegar
Correct Answer:
Sweet odour
Explanation:
Chloroform, a haloalkane, is commonly associated with a characteristic sweet odour.
4. Which physical property related to smell is commonly associated with haloalkanes?
A.
Characteristic sweet odour
B.
Strong ammoniacal odour
C.
Sharp acidic odour
D.
Sulfurous odour
Correct Answer:
Characteristic sweet odour
Explanation:
Haloalkanes, especially their lower members, commonly possess a characteristic sweet odour.
5. A student notices a sweet smell from a sample of a lower haloalkane. Is this observation consistent with its known physical properties?
A.
Yes, lower haloalkanes commonly have a sweet odour
B.
No, haloalkanes always have a sulfur smell
C.
No, haloalkanes are always completely odourless
D.
Yes, because all haloalkanes smell like ammonia
Correct Answer:
Yes, lower haloalkanes commonly have a sweet odour
Explanation:
A sweet odour is a commonly noted physical property of lower haloalkanes.
6. Which compound is associated with a sweet odour in basic descriptions of haloalkanes?
A.
Chloroform
B.
Ammonia
C.
Hydrogen sulfide
D.
Acetic acid
Correct Answer:
Chloroform
Explanation:
Chloroform is a haloalkane commonly described as having a sweet odour.
7. The odour of many haloalkanes is best described as:
A.
Pleasant and sweet
B.
Strongly fishy
C.
Sharp and acidic
D.
Like rotten eggs
Correct Answer:
Pleasant and sweet
Explanation:
Many haloalkanes, particularly lower members, are characterized by a pleasant, sweet odour.
8. Which statement about the odour of lower haloalkanes is correct?
A.
They often possess a characteristic sweet smell
B.
They always possess a pungent smell
C.
They smell like burning sulfur
D.
They necessarily have a fruity smell
Correct Answer:
They often possess a characteristic sweet smell
Explanation:
Lower haloalkanes often have a characteristic sweet smell, which is part of their physical description.
9. Which odour would most likely be associated with a typical lower haloalkane in a textbook description?
A.
Sweet
B.
Musty
C.
Sulfurous
D.
Ammoniacal
Correct Answer:
Sweet
Explanation:
Textbook descriptions commonly state that lower haloalkanes have a sweet odour.
10. Why are some lower haloalkanes recognized as having a characteristic sweet odour?
A.
Their physical properties include a sweet smell
B.
They release ammonia into the air
C.
They contain sulfur atoms responsible for a sulfurous smell
D.
They produce acidic vapours with a sour smell
Correct Answer:
Their physical properties include a sweet smell
Explanation:
The sweet odour is a characteristic physical property associated with many lower haloalkanes.
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