Advertisements
Advertisements
प्रश्न
________ is a chemical substance which alters the speed of a chemical reaction.
Advertisements
उत्तर
Catalyst is a chemical substance which alters the speed of a chemical reaction.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
How is a strong electrolyte different from a weak electrolyte?
Define an electrochemical reaction.
What do you understand by 'chemical reaction'?
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
