The enzyme which converts starch into the disaccharides maltose is_________________?
(A) Diastase
(B) Maltase
(C) Yeast
(D) None of these
____________________ of rubber decreases after its vulcanisation?
(A) Resistance to the action of organic solvent
(B) Tackiness
(C) Maximum service temperature
(D) Tensile strength
Reaction of an alcohol with organic acid is called the ________________ reaction?
(A) Saponification
(B) Esterification
(C) Neutralisation
(D) Acidification
The major use of butadiene is____________________?
(A) As a plasticiser for unsaturated polyester
(B) In the manufacture of synthetic rubber
(C) As an anti-skinning agent in paint
(D) None of these
Which glass is usually used in optical work ?
(A) Lead glass
(B) High silica (borosilicate) glass
(C) Photo-sensitive glass
(D) Fibre glass
Which of the following paper does not require a filler during manufacture ?
(A) Bond paper
(B) Writing paper
(C) Blotting paper
(D) Coloured paper
Fourdrinier machine is used in the manufacture of ___________________?
(A) Sugar
(B) Paper
(C) Alcohol from molasses
(D) Phenol formaldehyde
A mineral is termed as ‘ore’, if ____________________?
(A) A metal can be economically extracted from it
(B) It contains ≥ 40% metal
(C) The metal present in it is costly
(D) All A ,