CBSE X Chemistry Metals and Non Metals
Prevention of corrosion.
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19th March 2008
3:04 PM
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CBSE X Chemistry Metals and Non Metals
WHY DOES THE GALVANISED ARTICLE DO NOT GET CORRODED EVEN WHEN THE ZINC COATING IS BROKEN
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23rd March 2008
10:02 AM
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CBSE VIII Science Materials: Metals and Non Metals
which of the following element will produce oxide which are acidic in nature? A)carbon B)calcium C)magnesium D)copper when a vessel is exposed to moist air, it forms green coating on the surface. The vessel must be made of A)zinc B)copper C)magnesium D)iron
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22nd October 2017
6:58 PM
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CBSE VII Science Physical and Chemical Changes
a fraction of a ship's iron part has to be replaced every year
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12th November 2017
8:28 PM
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ICSE X Chemistry Metal - Non Metal
Al is more reactive than iron and yet there is no conversion of Al when both are exposed to air Explain the question and answer
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7th January 2018
3:50 PM
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ICSE X Biology Pollution - A Rising Environmental Problem
Blanks ___is a potent greenhous gas which is produced in the course of paddy cultivation CFCs and PCBs are___in nature Biomedical wastes should be burrnt in closed___ The major ssoil pollutants are __and ___wastes ___causes corrosion of the marble or brick surface___
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16th January 2018
8:08 PM
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ICSE X Chemistry Electrolytes, Non-Electrolytes and Electrolysis
Give reason why zinc is added for galvanising process
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18th March 2018
12:36 PM
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CBSE XII Science Chemistry The d-Block and f-Block Elements
Corrosion is nessesarily a chemical reaction where what all changes occur and its cell reaction is...
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22nd May 2018
6:04 AM
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ICSE VIII Chemistry Physical and Chemical Changes
What is the simplest definition of rusting ...
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17th June 2018
12:56 PM
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CBSE VIII Science Materials: Metals and Non Metals
silver articles are tarnished after few days.
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10th August 2018
9:42 PM
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ICSE VI Physics Simple Machines
......should be used to check rusting of machines
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23rd August 2018
8:49 PM
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CBSE X Chemistry Metals and Non Metals
define corrosion
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18th October 2018
10:52 PM
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CBSE VIII Science Materials: Metals and Non Metals
ships aresaved from being corroded by oxygen
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18th November 2018
5:05 PM
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ICSE VII Chemistry Metals and Non-Metals
What do you mean by corrosion of metals?
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23rd November 2018
12:32 PM
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CBSE X Chemistry Metals and Non Metals
What is rusting
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8th January 2019
10:58 PM
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ICSE VII Chemistry Metals and Non-Metals
What do you understand by corrosion? Explain ways to prevent it.
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26th February 2019
9:48 PM
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CBSE X Chemistry Metals and Non Metals
What reaction takes place when copper gets tarnished. Name the products formed while it gets cleaned when we rub it with lemon or tamarind juice.
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2nd March 2019
3:53 PM
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CBSE X Chemistry Metals and Non Metals
Corrosion
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17th May 2019
10:20 AM
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CBSE VII Science Physical and Chemical Changes
Write a word equation to represent the process of rusting of iron.Also write the chemical symbols and formulae of all the substances involved
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18th May 2019
9:01 AM
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CBSE X Chemistry Chemical Reactions and Equations
Maam 1. Can you give me the details of all oxides of iron - its colour,formation,chemical equation,etc? 2. Can there be two or more products in a combination reaction? Give examples.
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18th May 2019
12:52 PM
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CBSE X Chemistry Chemical Reactions and Equations
Why is galvanised article protected against rusting even when the zinc coating is broken
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4th June 2019
2:33 PM
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CBSE VIII Science Materials: Metals and Non Metals
Explain corrosion
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10th July 2019
5:45 PM
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CBSE X Chemistry Chemical Reactions and Equations
why do silver articles turn black when kept in open for a few days?
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21st July 2019
11:47 AM
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ICSE VII Chemistry Metals and Non-Metals
Chemistry questions for class 7 ICSE please answer all questions as first as possible when answer please inform me.
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22nd October 2019
9:52 PM
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ICSE VII Chemistry Metals and Non-Metals
Chemistry questions for class 7 icse pls answer all questions as first as possible when answer pls inform me.
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2nd November 2019
4:20 PM
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CBSE XI Science Chemistry Physical and Chemical Changes
What is corrosion
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31st January 2020
12:20 PM
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CBSE X Chemistry Chemical Reactions and Equations
Assertion- Silver articles become coated with a black layer upon exposure to air. Resaon- A layer of oxide gets deposited upon oxidation with air. A- Assertion and Reason both are correct and reason is the correct explanation of assertion. B- Assertion and Reason both are correct and reason is not the correct explanation of assertion. C- Assertion is true but reason is false. D- Reason is true but assertion is false Please provide an explanation too. Asked by vandanawasan02 | 13th Feb, 2020, 09:24: AM Expert Answer: Aseertion and reason both are correct and reason is correct explanation of assertion. When silver is exposed to air, it becomes black due to oxide coating, although silver is not very reactive metal but with passage of time, it slowly reacts with oxygen in the air and forms black coloures silver oxide. Follow up question- Silver forms sulphide layer upon oxidation. I am confused between B and C. A option is definitely wrong.
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13th February 2020
2:08 PM
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CBSE X Chemistry Chemical Reactions and Equations
what is corrosion?
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14th April 2020
1:45 PM
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CBSE X Chemistry Metals and Non Metals
The chemical reactions involved in the corrision of iron metals are? Explain.
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28th April 2020
7:37 AM
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CBSE X Chemistry Metals and Non Metals
surface of alluminium turns into dull colour after some few days.write the reaction
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25th May 2020
10:20 PM
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CBSE X Chemistry Metals and Non Metals
Consider the following chemical formula Fe2O3.xH2O What does xH2O refer here?
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5th June 2020
4:06 PM
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ICSE VII Chemistry Metals and Non-Metals
How iron is rusting?
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11th June 2020
11:22 AM
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ICSE IX Chemistry Chemical Changes and Reactions
I had a doubt that sir solved today on live class my doubt was ,-> can rusting of metal be prevented ? than he said yes by paint. so what chemicals or what are the quality of the paint which prevents rusting means how does it happen???? this is my question ,please help me out. thank you.
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17th June 2020
5:19 PM
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ICSE X Chemistry Metallurgy
How can rusting of metals be prevented?
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6th February 2021
10:11 PM
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CBSE X Biology Life Processes
Do moisture and air affect corrosion?Q1. Explain the process of digestion?
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18th August 2021
7:47 PM
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CBSE X Chemistry Chemical Reactions and Equations
Is corrosion both a chemical as well as physical change?
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23rd September 2021
1:57 PM
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CBSE XII Science Chemistry The d-Block and f-Block Elements
What we use to clean copper utensils and why?
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14th October 2021
2:54 PM
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ICSE VIII Chemistry Chemical Reactions
does copper also get rusted ? explain
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4th June 2022
5:48 PM
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CBSE X Science Metals and Non-Metals
explain conditions of corrosion with an activity
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4th September 2023
4:43 PM
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CBSE XII Science Chemistry Electrochemistry
The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere.
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7th February 2024
8:41 AM
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CBSE XII Science Chemistry Electrochemistry
What is Corrision .What are the factor affecting it?
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21st February 2024
4:23 AM
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