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?

Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.

______ character of a bond between two atoms is greater if the difference in their electro negativities is lesser.

In the following question, a sentence / a part of sentence is underlined. Below are given alternatives to the underlined part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose "No Improvement" option.

Ramu, Shyamu and Abdul came forward one after the others.

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

The scene will now shift to obtaining __________________ instruments of ratification to bring the agreement into force _________________ 2020, the first year of its________________ implementation. The agreement will enter into force with the ratification of ______________ 55 countries, whose aggregate greenhouse gas (GHG) emissions ________________ at least 55 per cent of global emissions.

whose aggregate greenhouse gas (GHG) emissions ________________ at least 55 per cent of global emissions.

Equus burchellii is the scientific name of _______.

How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?

ABCD is a parallelogram in which AB = 7 cm, BC = 9 cm and AC = 8 cm. What is the length (in cm) of other diagonal?