Questions

Elements A, B and C occur as Dobereiners triads. If the atomic mass of A is 7 and that of C is 39, what will be the atomic mass of B?

Which of the following phrases (i), (ii), and (iii) given below each sentence should replace the phrase printed in bold letters to make the sentence grammatically correct? Choose the best option among the five given alternatives that reflect the correct use of phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark (E) i.e., "No correction required" as the answer.
The trees shed his leaves every time autumn approaches but a healthy tree always gets its leaves back in the spring, which explains the point that fighting spirit is enough to keep one afloat.
i. Has shed their leaves every time autumn approaches
ii. shed their leaves every time autumn approaches
iii. shed its leaves every time autumn approaches

Select the word with the correct spelling.

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.

He refused them donation.

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

His shoes ( to cover ) with mud.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Diminish in value over a period of time

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

Obtain something by force, threats, or other unfair means.

Select the word with the correct spelling.