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WorksheetsEffect of heat on salts (form 4)
Total questions: 10
Worksheet time: 6mins
1. Limewater in diagram turns cloudy.
What is the gas released?
Hydrogen
Oxygen
Carbon dioxide
Ammonia
Name the gas released which lights up glowing splinter
carbon dioxide
ammonia
hydrogen
oxygen
Which of the following gas has brown colour?
nitrogen
nitrogen dioxide
ammonia
chlorine gas
nitrogen dioxide is .........
acidic
alkali
neutral
Which of the gasouses has pungent smell.
chlorine gas
nitrogen
ammonia
carbon dioxide
Which one is the chemical equations for effect of heat on copper(II) carbonate?
CuCO3
CuCO3 --> CuO + CO2
2Cu(NO3)2 --> 2CuO + 4NO2 + 2O2
CuO + CO2
What can be observe when copper (II) carbonate is heated?
It remains white during hot and cool.
it turns yellow when hot and white when cool.
it turns black
What is (are) produce when nitrate salt is heated?
carbon dioxide
nitrogen
oxygen
nitrogen dioxide
What salt can decompose during heating?
Zinc carbonate
sodium carbonate
ammonium nitrate
zinc sulphate
What happen when nitrate salt is heated?
The gas released turns lime water chalky.
The gas released rekindles the glowing wooden splinter
The gas released turns moist blue litmus paper to red.
The gas released turns moist red litmus paper to blue.
