chemi quiz that i need to do

color of zinc oxide after heating [hot/cold]

• yellow/white

• white/yellow

• brown/yellow

• yellow/brown

color of lead (II) oxide after heated [hot/cold]

• brown/white

• red-brown/red-brown

• black/black

• brown/yellow

color of copper (II) oxide after heated [hot/cold]

• brown/white

• red-brown/red-brown

• black/black

• brown/yellow

color of iron (III) oxide after heated [hot/cold]

• brown/white

• red-brown/red-brown

• black/black

• brown/yellow

identify the gas with the following characteristics:
• colorless

• no smell

• no effect on blue/red litmus paper (neutral pH)
• rekindle a glowing wooden splinter

• NO3

• O2

• H2

• Cl2

• NH3

identify the gas with the following characteristics:
• colorless

• no smell

• no effect on blue/red litmus paper (neutral pH)
• produce "pop" sound when tested with lighted wooden splinter

• O2

• HCl

• H2

• Cl2

• CO2

identify the gas with the following characteristics:
• colorless

• no smell

• change damp blue litmus paper to red

• turns limewater milky/cloudy

• Cl2

• CO2

• HCl

• NO2

• NH3

identify the gas with the following characteristics:
• colorless

• pungent smell

• change damp blue litmus paper to red

• produce white fumes with concentrated ammonia vapour

• O2

• HCl

• NO2

• CO2

• SO2

identify the gas with the following characteristics:
• colorless

• pungent smell

• change damp blue litmus paper to red

• decolourise KMnO4 (purple) or K2Cr2O7 (orange → green)

• O2

• HCl

• H2

• CO2

• SO2

identify the gas with the following characteristics:
• colorless

• pungent smell

• change damp red litmus paper to blue

• produce white fumes with concentrated HCl vapour

• NH3

• HCl

• O2

• SO2

• H2