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Why is Photosynthesis Considered an Endothermic Reaction? - Science

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प्रश्न

Why is photosynthesis considered an endothermic reaction?

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उत्तर

Photosynthesis is considered an endothermic reaction because in this process light energy from sunlight is absorbed to produce oxygen and glucose from carbon dioxide and water in the presence of chlorophyll.

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पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ १८]

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लखमीर सिंह Chemistry (Science) [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 8 | पृष्ठ १८

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संबंधित प्रश्‍न

Identify the substances that are oxidised and the substances that are reduced in the following reaction.

\[\ce{4Na(s) + O2(g) -> 2Na2O(s)}\]


Write the chemical formula of rust.


When SO2 gas is passed through saturated solution of H2S, the following reaction occurs:

SO2 + 2H2S → 2H2O + 3S

In this reaction, which substance is oxidised and which one is reduced?


In order to prevent the spoilage of potato chips, they are packed in plastic bags in an atmosphere of:
(a) Cl2
(b) H2
(c) N2
(d) O2


The process of respiration is:
(a)  an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic


In what respect does hydrogen differ from:

alkali metals


Why this reaction is considered a reversible reaction?


State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.

PbO + CO → Pb + CO2


Divide the following reactions into oxidation and reduction half-reaction:

Zn + Cu2+ → Cu + Zn 2+


Write the equation in the ionic form

CuSO4(aq)  + Fe(s)→ FeSO4(aq) + Cu(s)

 

 


Reacting with water, an active metal produces


Which of the following statements about hydrogen is incorrect?


Name:

a gas that is oxidizing as well as a reducing agent.


Explain the term oxidation in term of addition and removal of oxygen/hydrogen with a suitable example. 


Give two test for an oxidising agent.


When the positive charge on an ion increases or the negative charge on them decreases it is called as _______.


The process of reduction involves ____________.


Identify the reducing agent in the following reactions

`2"H"_2 + "O"_2 -> 2"H"_2"O"`


What is a redox reaction?


The sum of the oxidation number of all atoms in a compound is ______.


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