EASY

Earn 100

Explain the following term with one example.

Rancidity

Important Questions on Chemical Reactions and Equations

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

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 ?

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

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?

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

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

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)?

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

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

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

Explain the term rancidity with one example.