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Worksheetsmetals and nonmetals quiz (4)
Total questions: 10
Worksheet time: 5mins
When a copper vessel is exposed to moist air for long, it acquires a dull green coating.
The green material is a mixture of copper hydroxide (Cu(OH)2) and _____________ (CuCO3).
copper carbonate
copper hydroxide
copper water
none
2Cu+_____+____+____→Cu (OH)2 + CuCO3
H2o
O2
CO2
ALL OF THESE
metallic oxides are __________ in nature
ACIDIC
BASIC
NEUTRAL
NONE
The name of the product formed in the reaction of sulfur and oxygen is ____________ gas.
OXYGEN DIOXIDE
SUPHUR DIOXIDE
CARBON DIOXIDE
NITROGEN DIOXIDE
When sulphur dioxide is dissolved in water _______________acid is formed
SULPHUROUS
SULPHURIC
SULPHERRY
SLIPPERY
Sulphur dioxide (SO2) +_____________ → Sulphurous acid (H2SO3)
WATER
ACID
BASE
NONE
The sulphurous acid turns blue litmus paper _________
BLUE
RED
ORANGE
GREEN
Generally, oxides of non-metals are _______ in nature.
ACIDIC
BASIC
NEUTRAL
NONE
phosphorus is a very reactive ________
METAL
NONMETAL
To prevent the contact of phosphorus with atmospheric oxygen, it is stored in _____________
WATER
KEROSENE
AIR
VACCUM
