Chem Whiz

Question 1

Which of the following statements correctly describes the arrangement of particles in a solid?

Accepted Answer

0

Question 2

Which change of state occurs when a solid turns directly into a gas without becoming a liquid?

Accepted Answer

2

Question 3

What happens to the movement of gas particles when the temperature increases?

Accepted Answer

1

Question 4

Which of the following explains why gases can be compressed easily?

Accepted Answer

1

Question 5

Increasing pressure on a gas at constant temperature will decrease its volume.

Accepted Answer

o

Question 6

Boiling and evaporation are the same process.

Accepted Answer

x

Question 7

The atomic number of an element represents the number of protons in the nucleus.

Accepted Answer

o

Question 8

An atom has 11 protons, 12 neutrons, and 11 electrons. What is its mass number?

Accepted Answer

3

Question 9

Which of the following is an isotope?

Accepted Answer

1

Question 10

Which type of bond is formed when electrons are transferred from one atom to another?

Accepted Answer

1

Question 11

What type of bonding is present in a molecule of water (H₂O)?

Accepted Answer

2

Question 12

Which of the following substances contains metallic bonding?

Accepted Answer

2

Question 13

Why do ionic compounds have high melting and boiling points?

Accepted Answer

1

Question 14

Covalent compounds conduct electricity in molten or aqueous state.

Accepted Answer

x

Question 15

Metallic bonding involves a "sea of delocalized electrons" that allows metals to conduct electricity.

Accepted Answer

o

Question 16

Which of the following is a property of alkali metals (Group I elements)?

Accepted Answer

2

Question 17

Which statement is true about elements in the same group of the periodic table?

Accepted Answer

1

Question 18

Transition metals have low melting points and are poor conductors of electricity.

Accepted Answer

x

Question 19

Why is fractional distillation used instead of simple distillation to separate ethanol from water?

Accepted Answer

1

Question 20

What property of substances does paper chromatography rely on?

Accepted Answer

1

# 1

pilihan

Which of the following statements correctly describes the arrangement of particles in a solid?

# 2

pilihan

Which change of state occurs when a solid turns directly into a gas without becoming a liquid?

# 3

pilihan

What happens to the movement of gas particles when the temperature increases?

# 4

pilihan

Which of the following explains why gases can be compressed easily?