हिंदी

Identify from the reaction the reactants that undergo oxidation and reduction. 2Mg + O2 → 2MgO - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Identify from the reaction the reactants that undergo oxidation and reduction.

2Mg + O2 → 2MgO

\[\ce{2Mg + O2 ->[\Delta] 2MgO}\]

टिप्पणी लिखिए

उत्तर १

In a reaction, magnesium is changing to magnesium oxide. That means, oxygen is being added to magnesium. Addition of oxygen to a substance is called oxidation, so magnesium undergoes oxidation.

shaalaa.com

उत्तर २

Mg undergoes oxidation and O2 undergoes reduction.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Chemical reactions and equations - Answer the Following

APPEARS IN

एससीईआरटी महाराष्ट्र Science and Technology 1 [English] 10 Standard SSC
अध्याय 3 Chemical reactions and equations
Answer the Following | Q 3.2
बालभारती Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board
अध्याय 3 Chemical reactions and equations
Exercise | Q 6. c. | पृष्ठ ४६

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

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

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


Which of the statements about the reaction below are incorrect?

\[\ce{2PbO(s) + C(s) → 2Pb(s) + CO2(g)}\]

  1. Lead is getting reduced.
  2. Carbon dioxide is getting oxidised.
  3. Carbon is getting oxidised.
  4. Lead oxide is getting reduced.

A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black-colored compound formed.


Write the chemical formula of rust.


Give an example of an oxidation reaction.


Give one example of an oxidation-reduction reaction which is also a displacement reaction.


Explain reduction in terms of gain or loss of oxygen with one example.


In the reaction represented by the following equation: 

CuO (s) + H2 (g) → Cu (s) + H2O (1)

(a) name the substance oxidised
(b) name the substance reduced
(c) name the oxidising agent
(d) name the reducing agent


The electron releasing tendency of zinc is ______ than that of copper. 


Electrolysis is a redox process. Explain.


How would you change a metal like Cu into its ions?


Identify from the reaction the reactants that undergo oxidation and reduction.
Fe + S → FeS


Identify from the following reaction the reactants that undergo oxidation and reduction.

2Ag2O → 4 Ag + O2 ↑


Identify from the reaction the reactants that undergo oxidation and reduction.

\[\ce{NiO + H2 -> Ni + H2O}\]


Explain the following in term of gain or loss of oxygen with two examples.

Oxidation


Compare hydrogen with alkali metals on the basis of:

Oxide formation 


In what respect does hydrogen differ from:

alkali metals


Is it essential that oxidation and reduction must occur side by side in a chemical reaction? Explain


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

Cl2 + H2S → 2HCl + S 


State whether the following conversion is oxidation or reduction:

PbO2 + SO2→ PbSO4 


State whether the following conversion is oxidation or reduction:

2Cl- - e-→ Cl2 


Write the equation in the ionic form

CuSO4(aq)  + Fe(s)→ FeSO4(aq) + Cu(s)

 

 


A metal oxide that is reduced by hydrogen is


For the reaction PbO + H2→ Pb + H2O, which of the following statements is wrong?


State what is reducing agent. Give an example of oxidising agent in the gaseous, liquid, and solid form.


Write chemical formula for rust.


Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Oxidation means losing electrons then what is reduction?


Identify the oxidising agent (oxidant) in the following reactions

`"V"_2"O"_5 + 5"Ca" -> 2"V" + 5"CaO"`


During the reaction of some metals with dilute hydrochloric acid, following observations are made.

Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.

Explain this observation giving suitable reason.


The formation of brown colour on the freshly unit surface of vegetables and fruits is because ______ of organic compounds present in them.


The tarnishing of metals is due to the formation of ______.


______ is a metal that has a high resistance to corrosion.


Identify the following reactions as oxidation/reduction/redox reaction

CuO+H2 → Cu+H2O


What are reducing agents? Give examples.


Find the oxidation number of the element in the following compound.

N in NH3


The metallic oxide which can be reduced by using common reducing agents is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×