Advertisements
Advertisements
प्रश्न
________ is a chemical substance which alters the speed of a chemical reaction.
उत्तर
Catalyst is a chemical substance which alters the speed of a chemical reaction.
APPEARS IN
संबंधित प्रश्न
How would you show that setting of curd is a chemical change?
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
Give an example of a reaction where the following are involved
Heat
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Which of the following is a chemical change?
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
Iron and rust are the same substances.
