Correct answer
C. Hydrochloric acid (concentrated)
Explanation
The correct answer is Hydrochloric acid (concentrated).
Main constituents of purified Lurgi gas are________?
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about ________ percent?
Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)?
The ends of a cylindrical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure?
Which of the following judges the accuracy of an instrument?
Which of the following gives the crushing energy required to create new surface?