Integrated Science

Question 1

1The chemical formula of water is

Easy

A. H₂O B. OH C. HO₂ D. H₂O₂

Question 2

2An atom loses two electrons. The particle formed is

Hard

A. a negative ion B. a positive ion with charge +2 C. a molecule D. an isotope

Question 3

3The number of protons in an atom is called its

Easy

A. atomic number B. mass number C. valency D. charge

Question 4

4Paper chromatography is used to separate

Easy

A. iron and sulphur B. sand and water C. oil and water D. the dyes in ink

Question 5

5The mass number of an atom with 17 protons and 18 neutrons is

Hard

A. 18 B. 17 C. 1 D. 35

Question 6

6Which of the following is a physical change?

Easy

A. rusting of iron B. souring of milk C. burning of paper D. melting of ice

Question 7

7The electron configuration of an element with atomic number 17 is

Hard

A. 2, 7, 8 B. 2, 8, 8 C. 2, 8, 6, 1 D. 2, 8, 7

Question 8

8Which method separates salt from salt solution?

Easy

A. magnetism B. decantation C. filtration D. evaporation

Question 9

9Oil and water can be separated using a

Easy

A. magnet B. filter paper C. sieve D. separating funnel

Question 10

10The process used to obtain pure water from sea water is

Easy

A. filtration B. chromatography C. decantation D. distillation