Chemistry
One of the characteristics of a chemical reaction is :
- Catalyst
- Chemical bond
- Effervescence
- Evolution of gas
Related Questions
When potassium chlorate is heated, the gas evolved is :
- Hydrogen
- Chlorine
- Oxygen
- Nitrogen
A solution of silver nitrate is added to a solution of sodium chloride. The colour of the precipitate formed is :
- Black
- White
- Grey
- Green
Which of the following acts as a catalyst in the manufacture of ammonia gas from nitrogen and hydrogen ?
- Manganese dioxide
- Platinum
- Iron
- Molybdenum
The process of photosyntheis takes place in the presence of :
- Electricity
- Heat
- Light
- Sound