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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
How do the following help in bringing about a chemical change?
catalyst .
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
Define electrolysis.
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Multiple choice:
Which of the following is not a characteristic of a chemical change?
What is a chemical change? Give two examples of chemical change?
What do you observe? When
Water is added to the quick lime.
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Circle the odd one out. Give reason for your choice
What is the use of indicator?
When magnesium is burnt in the air, a new substance is formed which is ______.
Write a note on the catalyst.
