Advertisements
Advertisements
प्रश्न
Multiple choice:
Thermal decomposition of sodium carbonate will produce
विकल्प
Carbon dioxide
Oxygen
Sodium hydroxide
No other product
Advertisements
उत्तर
Carbon dioxide
APPEARS IN
संबंधित प्रश्न
FILL IN THE BLANK
A .............. change is a temporary change.
Is kerosene an electrolyte or a non-electrolyte ?
Fill in the blank
A new substance is always formed in a _______ change.
Explain the following reaction with one suitable example of Displacement reaction.
Give a word equation for the following reaction.
Two gases which combine to give a solid.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of water to quicklime.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
_____ is the basic material to manufacture urea.
Iron and rust are the same substances.
Explain how the painting of an iron gate prevents it from rusting.
