Mid-tri Exam Buster - Chem I -PASS

The number 0.000003130 in scientific notation is:

• 3.13 x 10^-6

• 3.13 x 10^6

• 3.130 x 10^-6

• 3.130 x 10^6

Convert 9.24 x 10^-4 km to pm

• 9.24 x 10^11 pm

• 9.24 x 10^8 pm

• 9.24 x 10^5 pm

• 9.24 x 10^2 pm

The correct answer to 1.593 - 0.048 is:

• 1.545

• 1.54

• 1.5

• 1.6

The correct answer to (5.382 cm x 3.52 cm) – 8.33 cm^2 is:

• 18.9 cm

• 10.57 cm^2

• 10.6 cm^2

• 18.94 cm^2

The property characteristic of liquids is:

• Takes volume of container

• Very strong attraction between particles

• Definite rigid pattern of particles

• Takes shape of container

Which of these implies a chemical change?

• Sublimation

• Fusion

• Colour change

• Deposition

Which of the following is true about mixtures?

• Mixtures are matter that is chemically pure

• Mixtures are a physical combination of substances

• Mixtures are two or more elements combined in fixed proportions

• Mixtures cannot be separated by physical processes

The number of neutrons in Se-79 is:

• 8

• 34

• 45

• 79

The number of electrons in Ba is:

• 2

• 56

• 137

• 81

Which of the below elements is an Alkali earth metal?

• Mg

• Na

• Li

• Br