E-PolyLearning

1. Brass is an example of
a. An alloy
b. a compound
c. a mixture
d. an element
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Answer: (a).An alloy

2. A particle may be
a. an atom
b. a molecule
c. an isotope
d. all of these
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Answer: (d).all of these

3. Other than O and C, main elements of a brick wall includes
a. Silicon (Si)
b. Calcium (Ca)
c. Aluminum (Al)
d. both a and b
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Answer: (d).both a and b

4. Symbol of Magnesium is
a. Mg
b. Mn
c. Hg
d. M
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Answer: (a).Mg

5. Naturally occurring elements are
a. 82
b. 92
c. 99
d. above 100 by now
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Answer: (b).92

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