Chemistry Practice Question and Answer
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Q: German silver used for making utensils is an alloy of
1901 05ed88dbbb516791f26501eea
5ed88dbbb516791f26501eea- 1copper silver nickelfalse
- 2copper zinc nickeltrue
- 3copper zinc aluminumfalse
- 4copper nickel aluminumfalse
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Answer : 2. "copper zinc nickel "
Q: What percentage of carbon is in steel?
1875 05feb07d1f33a00432aff075e
5feb07d1f33a00432aff075e- 13%false
- 24%false
- 32%true
- 45%false
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Answer : 3. "2%"
Q: Impure camphor is purified by
1796 05ed8d0e4e4997750bdbabbef
5ed8d0e4e4997750bdbabbef- 1sublimationtrue
- 2fractional crystallizationfalse
- 3fractional distillationfalse
- 4steam distillationfalse
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Answer : 1. "sublimation"
Q: Who is called the father of modern chemistry?
1783 05ef430d7bea49d16b47d5818
5ef430d7bea49d16b47d5818- 1Daltonfalse
- 2Lavoisiertrue
- 3Mendeleevfalse
- 4None of thesefalse
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Answer : 2. "Lavoisier"
Q: What is the role of a positive catalyst in a chemical reaction?
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5ed8d7d354f88e519fa2312f- 1It increases the rate of reactiontrue
- 2It decreases the rate of reactionfalse
- 3It increases the yield of the productsfalse
- 4It provides better purity of the productsfalse
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Answer : 1. "It increases the rate of reaction "
Q: The atomic mass of an element has the maximum number of electrons in its second orbit—
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5f86a83ddcf12a01a1418fb3- 12false
- 28true
- 310false
- 416false
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Answer : 2. "8"
Q: Washing soda is the common name for
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5edef8088c4c964f73d377df- 1Calcium carbonatefalse
- 2Sodium carbonatetrue
- 3Calcium bicarbonatefalse
- 4Sodium bicarbonatefalse
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Answer : 2. "Sodium carbonate"
Q: Crystallization is an example of
1618 05f742bd338027c5313ed6bc9
5f742bd338027c5313ed6bc9- 1Physical changetrue
- 2Chemical Transformationfalse
- 3Chemical reactionfalse
- 4Galvanizationfalse
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Answer : 1. "Physical change"
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