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प्रश्न
Name three biochemical catalysts found in the human body.
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उत्तर
Biochemical catalysts found in human body:
- Pepsin
- Tryspin
- lipase.
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Give an example of a reaction where the following are involved:
Solution
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Explain,giving one example of the following chemical changes:
Reversible reaction
Name: A greenish-yellow gas.
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
________ is a chemical substance which alters the speed of a chemical reaction.
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
The percentage composition of Nitrogen in Ureas is ______.
Burning of paper is the best example of ______ change.
Give an example where heat, light, and sound are produced during a chemical change.
