Two liquids X and Y on mixing gives a warm solution. The solution is ……

(a) ideal 

(b) non-ideal and shows positive deviation from Raoults law 

(c) ideal and shows negative deviation from Raoults Law 

(d) non – ideal and shows negative deviation from Raoults Law

The old man, shivering at times but fixed of purpose, plodded on till he came out of the town gate on to a straight road. Along this, he now went at a somewhat slower pace, supporting himself on his old staff.

(a) Who was the old man ?

(b) Why was he shivering ?

(c) Where was he going so early ?

(d) What does the phrase, ‘plodded on’ mean ?