English
Maharashtra State BoardSSC (English Medium) 10th Standard

Identify the type of chemical reaction given below: 2Mg+OA2⟶2MgO - Science and Technology 1

Advertisements
Advertisements

Question

Identify the type of chemical reaction given below:

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

One Line Answer
Advertisements

Solution

Combination reaction and Oxidation reaction

shaalaa.com
  Is there an error in this question or solution?
2021-2022 (March) Set 1

APPEARS IN

RELATED QUESTIONS

Corrosion can be prevented by using ……………. solution.


Why is photosynthesis considered an endothermic reaction?


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?


Give an example of an oxidation reaction.


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


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


When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.


You are given the following chemical equation:

Mg (s) + CuO (s) → MgO (s) + Cu (s)

This equation represents:
(a) decomposition reaction as well as displacement reaction
(b) combination reaction as well as double displacement reaction
(c) redox reaction as well as displacement reaction
(d) double displacement reaction as well as redox reaction


Fill in the blank

 Oxidation is the removal of ......................and addition of ....................


Fill in the blank

In redox reaction oxidation and reduction occur ............................


Name the following:

The process in which oxygen is added or hydrogen is removed.


Define reduction.


TRUE \ FALSE

Hydrogen is a good oxidizing agent.


Electrolysis is a redox process. Explain.


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


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

\[\ce{2Ag2O → 4 Ag + O2 \uparrow}\]


Compare hydrogen with alkali metals on the basis of:

Oxide formation 


Compare hydrogen and halogens on the basis of:

reaction with oxygen 


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.

PbO + CO → Pb + CO2


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

H2+ Cl2→ 2HCl + S


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

Cl2 + 2Br- → Br2 + 2Cl-


Divide the above equation into oxidation and reduction half-reactions.


Reacting with water, an active metal produces


Which of the following statements about hydrogen is incorrect?


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


Name: 

a substance that oxidizes concentrated HCl to chlorine.


Complete and balance the following equation:

Fe + H2O →___________+____________


State a reason why, when hydrogen is passed over heated copper oxide, the resultant product formed, differs in colour from the original reactant.


State the condition and give balanced equation for the conversion of coke to water gas.


Write chemical formula for rust.


Rusting of iron involves a chemical reaction which is a combination of:


Which of the following statements about the given reaction are correct?

\[\ce{3Fe_{(s)} + 4H2O_{(g)} -> Fe3O4_{(s)} + 4H2_{(g)}}\]

(i) Iron metal is getting oxidised.

(ii) Water is getting reduced.

(iii) Water is acting as the reducing agent.

(iv) Water is acting as oxidising agent.


The process of reduction involves ____________.


\[\ce{MnO2 + 4HCl -> + 2H2O + Cl2}\]

Identify the substance oxidized in the above equation.


Select the oxidising agent for the following reaction:

\[\ce{H2S + I2 -> 2HI + S}\]


Identify the reducing agent in the following reactions - 

`"H"_2"O" + "F"_2 -> "HF" + "HOF"`


Which among the following are physical or chemical change?

Heating of an iron rod to red hot


Which among the following are physical or chemical change?

Sublimation of solid ammonium chloride


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

The temperature of the reaction mixture rises when aluminium (Al) is added.

Explain this observation giving suitable reason.


Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid whereas copper does not. Explain why?


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.


Mention some oxidation reactions that occur in daily life.


The tendency of atoms to have eight electrons in the outer shell is known as ______.


Oxidizing agents are otherwise called ______.


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


Choose the odd one out and write the reason:


Identify the following reactions as oxidation/reduction/redox reaction

Zn + CuSO4 → Cu + ZnSO4


Identify the following reactions as oxidation/reduction/redox reaction

CuO+H2 → Cu+H2O


What are reducing agents? Give examples.


Define oxidation number.


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

Zn in ZnSO4


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

N in NH3


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

A1 in AlCl3


It is recommended to use air tight containers for storing oil for a long time.


In the redox reaction:

MnO2 + 4HCl → MnCl2 + 2H2O + Cl2


A reddish brown metal used in electrical wires when powdered and heated strongly turns black. When hydrogen gas is passed over this black substance, it regains its original colour. Based on this information answer the following questions:

  1. Name the metal and the black substance formed.
  2. Write balanced chemical equations for the two reactions involved in the above information

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×