मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Balance the given chemical reaction as per the instructions below. NaOH+HX2SOX4⟶NaX2SOX4+HX2O Oxidation means losing electrons then what is reduction? - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Balance the given chemical reaction as per the instructions below.

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

Oxidation means losing electrons then what is reduction?

एका वाक्यात उत्तर

उत्तर

Reduction is gain of electrons.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Chemical reactions and equations - Answer the following questions

APPEARS IN

एससीईआरटी महाराष्ट्र Science and Technology 1 [English] 10 Standard SSC
पाठ 3 Chemical reactions and equations
Answer the following questions | Q 1.5

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

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


The chemical formula for rust is.............. .


Why does the colour of copper sulphate solution change when an iron nail is dipped in it?


Write the chemical formula of rust.


What are anti-oxidants? Why are they added to fat and oil containing foods?


Define reduction in terms of gain or loss of hydrogen with one example.


In the context of redox reactions, the removal of hydrogen from a substance is known as:
(a) oxidation
(b) dehydration
(c) reduction
(d) dehydrogenation


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


Define oxidation.


MULTIPLE CHOICE QUESTIONS

The process of adding oxygen to a substance is called

  1. oxidation.
  2. reduction.
  3. displacement.
  4. hydrogenation.

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


Give the general group study of hydrogen with reference to

burning


Compare hydrogen and halogens on the basis of:

reaction with oxygen 


Why this reaction is considered a reversible reaction?


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

Cl2 + H2S → 2HCl + S 


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

Cl2 + 2Br- → Br2 + 2Cl-


Name:

an oxidizing agent that does not contain oxygen.


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


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


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


Identify the following reactions as oxidation or reduction

  1. Na → Na+ + e
  2. Fe3+ + 2 e- → Fe+

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.


Identify the reducing agent in the following reactions

`4"NH"_3 + 5"O"_2 -> 4"NO" + 6"H"_2"O"`


Identify the reducing agent in the following reactions - 

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


Identify the oxidising agent (oxidant) in the following reactions

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


Identify the oxidising agent (oxidant) in the following reactions

`3"Fe" + 4"H"_2"O" -> "Fe"_3"O"_4 + 4"H"_2`


Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. Under what conditions do these grapes ferment? Is it a chemical or a physical change?


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.


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.


Identify the following reactions as oxidation/reduction/redox reaction

CuO+H2 → Cu+H2O


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

N in NH3


In the redox reaction:

MnO2 + 4HCl → MnCl2 + 2H2O + Cl2


State the change in colour observed in following case mentioning the reason:

Copper powder is strongly heated in air.


The oxidizing agent in the equation \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\] is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×