Nitrification is the biological process of converting

Who is the originator of the game of chess?

He has all his ducks in a row, he is complacent. 

A tank contains a mixture of 80 litre of milk and water. 70% of the milk and 30% of the water are drawn, therefore 55% part of the tank become empty. Find the initial quantity of milk and water in the tank.

Four forms of a dice are shown below. In this dice is addition of it’s two opposite surface is 7. Which will be the right form of this dice in given forms?

Choose the alternative which shows the correct translation from Hindi to English

मोहन घर से लौटकर कहने लगा कि उसका मन नहीं लग रहा था। वाक्य का सही अंग्रेजी रूपांतरण है