Chemistry Practice Question and Answer
2 4 Q:
63c7a61fbdbddb32fd9cc85f 4 Q:
6491958013e8bde0322b983e Answer : 3. "combination"
Q: Which of the following is not a lewis acid?
984 063c7a61fbdbddb32fd9cc85f
63c7a61fbdbddb32fd9cc85f- 1aluminum chloridefalse
- 2sodium ionfalse
- 3Sulphur tetrafluoridefalse
- 4hydroxide iontrue
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Answer : 4. "hydroxide ion"
Q: Burning of coal is a ______ reaction.
936 06491958013e8bde0322b983e
6491958013e8bde0322b983e- 1displacementfalse
- 2decompositionfalse
- 3combinationtrue
- 4double displacementfalse
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Answer : 3. "combination"
Explanation :
1. The burning of coal is an example of a combination reaction (a combination).
2. When two or more elements combine to form a compound, it is called a combination reaction.
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