हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Name Three Biochemical Catalysts Found in the Human Body.

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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:

  1. Pepsin
  2. Tryspin
  3. lipase.
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अध्याय 6: Chemical Reactions - Exercise 1 [पृष्ठ ७३]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 1 | Q 4.3 | पृष्ठ ७३

संबंधित प्रश्न

Complete and balance the following chemical equations:

Ba`"CI"_2`   +  `"H"_2"SO"_4`   `→`

    (aq.)           (aq.)


Fill in the blank

 A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.


Give reason .

A person suffering from acidity is advised to take an antacid.


TRUE \ FALSE

The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?


What are chemical reactions?


Write true or false :

When potassium iodide solution is added to lead acetate solution a red precipitate is formed.


Name the type of chemical reaction shown by the following equation:

Fe + CuSO4 → FeSO4 + Cu


Explain by writing a word equation.

Respiration is a chemical change. 


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Water


Give an example of a reaction where the following are involved:

Solution


Distinguish by dilute sulphuric acid.

Copper and magnesium?


Give reason for the following:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.


Give reason for the following:

Electrolytic decomposition of water is a reaction involving change of state.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.


Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction

Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.


Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.


Burning of paper is the best example of ______ change.


Which of the following statement is incorrect for a chemical reaction?


The chemical formula of rust is ______.


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