MEDIUM
Earn 100

When silver is corroded what does it form?

Important Questions on Chemical Reactions and Equations

MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
A silver article generally turns black when kept in open for few days. The article when rubbed with toothpaste again starts shining.

Name the black substance formed and give its chemical formula.
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Name two anti-oxidants which are usually added to fat and oil-containing foods to prevent rancidity.
EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Oil and fat containing food items are flushed with nitrogen. Why?
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
A silver article generally turns black when kept in open for few days. The article when rubbed with toothpaste again starts shining.

Why do sliver articles turn black when kept in the open for a few days? Name the phenomenon involved.
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life

Give scientific reason:

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

EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Explain why food products containing fats and oils (like potato chips) are packaged in nitrogen.
EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Oil and fat containing food items are often flushed with a gas. Which is this gas and why are they flushed ?
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Explain the term rancidity with one example.
HARD
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Name the term rancidity. Why is it caused? Suggest some measures to check rancidity.
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Explain the term "rancidity". What damage is caused by rancidity?
EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Name two gases that can be used for the storage of fresh sample of an oil for a long time.
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

To prevent rusting, a layer of ______ metal is applied on iron sheets.

EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
What are anti-oxidants? Why are they added to fat and oil-containing foods?
HARD
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
By writing a chemical equation state two factors that are responsible for the rusting of iron.
MEDIUM
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Why do we apply paint on iron articles?
EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
What is the general name of the chemicals which are added to fat and oil-containing foods to prevent the development of rancidity?
HARD
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Explain corrosion with one example.
HARD
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Oil and fat containing food items are flushed with nitrogen. Why?
EASY
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life
Which term is used to indicate the development of unpleasant smell and taste in fat and oil-containing foods due to aerial oxidation(when they are kept exposed for a considerable time)?
HARD
Science>Chemistry>Chemical Reactions and Equations>Effects of Oxidation Reactions in Everyday Life

Observe the following picture and write-down the chemical reaction with explanation.

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