Some of the questions of unit 7.1

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

When do these substances conduct electricity?

solid and liquid state

liquid state

never

metal

salt

molecular substance

Which group of substances does zinc chloride (ZnCl2) belong to? (Q2a)

1. Metals
2. Salts
3. Molecular substances

Meaning of this safety symbol (Q2c)

1. harmful
2. harmful for the environment
3. corrosive
4. poisonous

Meaning of this safety symbol (Q2c)

1. harmful
2. harmful for the environment
3. corrosive
4. poisonous

Meaning of this safety symbol (Q2c)

1. harmful
2. harmful for the environment
3. corrosive
4. poisonous

What is the purpose of H-sentences? (Q2d)

1. Hesitation
2. Harmful
3. Hazard
4. Health

What is the purpose of P-sentences? (Q2f)

1. Precision
2. Prevention
3. Purpose
4. Position

Water (H2O) is a

1. metal
2. salt
3. molecular substance

Potassium nitrate (KNO3) is a

1. metal
2. salt
3. molecular substance

Silver (Ag) is a

1. metal
2. salt
3. molecular substance

Paraffin (C24H50) is a

1. metal
2. salt
3. molecular substance

Iodine (I2) is a

1. metal
2. salt
3. molecular substance

Copper (Cu) is a

1. metal
2. salt
3. molecular substance

Table salt (NaCl) is a

1. metal
2. salt
3. molecular substance

Carbon dioxide (CO2) is a

1. metal
2. salt
3. molecular substance

Methane (CH4) is a

1. metal
2. salt
3. molecular substance

Tin (Sn) is a

1. metal
2. salt
3. molecular substance

Ethanol (C2H5OH) is a

1. metal
2. salt
3. molecular substance

Aluminium oxide (Al2O3) is a

1. metal
2. salt
3. molecular substance

Ammonia (NH3) is a

1. metal
2. salt
3. molecular substance

Barium (Ba) is a

1. metal
2. salt
3. molecular substance