Question

A. Multiple Choice Questions (MCQs)
1. An element is made
up
a. different kinds of atoms
b. one kind of atoms
c. different kinds of molecules
d. none of these

2. Which of the following is a compound?
a. N2
b. S
c. NaCI
d. sand

3. Which of the following is a mixture?
a. NaCl+CaCO3
b. Na2CO3
c. H2
d.none of these

4. Which of the following is a homogeneous mixture of two solids?
a. air
b.brass

c.graphite
d. nitrogen

5. Which of the following technique to be used to separate chalk from the mixture of chalk and water?
a. filtration
b. sedimentation
c. evaporation
d. sieving​

Answer 1

Answer:

1b

2c

3a

4b

5c

these are the correct answers

Answer 2

Explanation:

1) a

2) c

3) b

4) c

5) a

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