Nitrogen shows maximum covalency of

• 3
• 4
• 5
• none of these

Phosphine has -------------------like smell

• fish
• egg
• flower
• none of th

How many valence electrons are in the element iodine?

• 1
• 4
• 7
• 8

Colours of group 7 elements are....

• Chlorine- pale yellow/green, Bromine orange/brown, iodine - grey shiny 
• Chlorine- grey shiny, Bromine orange/brown, iodine - Yellow

States of group 7 elements are ...

• fluorine - liquid, chlorine - gas, Bromine liquid, iodine solid
• fluorine - gas, chlorine - gas, Bromine liquid, iodine gas
• fluorine - gas, chlorine - gas, Bromine liquid, iodine solid
• fluorine - gas, chlorine - gas, Bromine gas, iodine solid

When you mix chlorine water and sodium bromide solution you will see

• an orange brown colour
• fizzing
• blue colour
• no change

Balance the ionic equation:
Cl₂ + KBr → Br₂  + KCl

• Cl₂ + 2KBr → Br₂ + 2KCl
• Cl₂ + 2KBr → Br₂ + KCl
• Cl₂ + KBr → Br₂ + 2KCl

What does the combination of Chlorine gas and Water produce?

• Hydrobromic Acid
• Phosgene
• Hydrochloric Acid
• Chlorine and Carbon Monoxide

What was the chemical that was used by the Germans that made Chlorine more lethal?

• Hydrobromic Acid
• Hydrochloric Acid 
• Diphosphate
• Phosgene COCl2

What was the name of the combination of chlorine gas and carbon monoxide gas that was 18 times more powerful than Chlorine?

• Mustard
• DiPhosgene
• Phosgene
• Chlorine 3