Practice quiz

Metals are usually hard except

• Sodium

• Lithium

• Both of them

• All metals are hard and there is no exception

Temperature and atmospheric pressure required for hydrogenation is:

• -250^oC and 6 atm

• 250^oC and 8 to 10 atm

• -259^oC and 8 atm

• -250^oC and 8-10 atm

Which gas(es) is required to produce ammonia?

• H₂

• N₂

• Both H₂ and N₂

• O₂

Atomic number of sulfur is:

• 16

• 17

• 15

• 18

Molecular formula of Magnesium carbonate is:

• MgCO₃

• Mg₂CO₃

• MgCO₂

• Mg(CO₃)₂