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प्रश्न
Describe briefly the ionic concept of oxidation and reduction. Give an equation to illustrate.
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उत्तर
In the electronic concept, oxidation is a process in which an atom or ion loses an electron(s).
Zn → Zn2+ + 2e-
Oxidation is also defined as a chemical process which involves
Addition of oxygen
Addition of electronegative ion
Removal of hydrogen
Removal of electropositive ion (element)
In the electronic concept, reduction is a process in which an atom or ion gains electrons.
Cu2+ + 2e-→ Cu
The reduction is also defined as a chemical process which involves
Removal of oxygen
Addition of electropositive ion
Addition of hydrogen
Removal of electronegative ion
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संबंधित प्रश्न
The colours of aqueous solutions of CuSO4 and FeSO4 as observed in the laboratory are:
(A) pale green and light blue respectively
(B) light blue and dark green respectively
(C) dark blue and dark green respectively
(D) dark blue and pale green respectively
With reference to oxidation & reduction reaction – complete the statement given by filling in the blanks with only the words (a) Addition (b) Removal.
‘Oxidation is a chemical reaction involving ____ of oxygen to a substance or ____ of hydrogen from a substance. Reduction on the otherhand involves ____ of hydrogen to a substance or ____ of oxygen from a substance.
Explain the term reduction in term of addition and removal of oxygen/hydrogen with a suitable example.
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen is a strong reducing agent.
Select the oxidising agent for the following reaction:
\[\ce{H2S + I2 -> 2HI + S}\]
Which among the following are physical or chemical change?
Burning of Liquefied Petroleum Gas (LPG)
What happens when zinc granules are treated with dilute solution of H2SO4, HCl, HNO3, NaCl and NaOH Also write the chemical equations if reaction oçcurs.
What are redox reactions? Give examples.
Identify the type of chemical reaction given below:
\[\ce{2Mg + O2 -> 2MgO}\]
Answer the questions based on the equation below:
\[\ce{CH3 - CH2 - OH ->[{[O]}][K2Cr2O7/H2SO4] CH3 - COOH}\]
- What type of reaction is it?
- What is the role of the chemical written on the arrow?
- Give one example of one such type of chemical as in answer (b).
