Questions

Improve the bracketed part of the sentence.

The passengers (were waited) for the flight at the emigration lobby, for long.

Select the antonym of:

to sue

Select the antonym of

to lament

Improve the bracketed part of the sentence.

Many such mishaps can be avoided if we (are) careful.

Select the antonym of 

homogeneous

Select the antonym of

repatriation

Consider the following chemical reaction :

aFe2O3(s) + bCO(g) + cFe(s) + dCO2

In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?