Questions

When iron is exposed to moist air, a reddish brown coating of hydrated Iron (III) Oxide (Fe2O3) is deposited on its surface. This reddish brown coating is called

What happens in an oxidation reaction?

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

What is the ratio of masses of hydrogen and oxygen in the water?

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.

He said to the doctor, "How soon will I be able to walk again?"

Select the word with the correct spelling.

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

She nodded her

A-head, and unapologetically shrugged

B-her shoulders while pointing to the

C-fine receipt she had just handed to me

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.