Chemical substance which prevent the growth of micro-organisms or kill them but are not harmful to the living human tissues are called
Antiseptics
Analgetics
Pesticides
Disinfectant
The study of forces and their effects are coming under
Chemistry
Biology
Maths
Physics
The burning sensation of chilly pepper is due to the presence of chemical
Cytosine
Uracil
Capaicin
Thiamine
Which of the following connects the barrel of the Bunsen burner to the source of gas?
Wire gauze
Rubber tubing
Barrel
Base stand
Luminous flame occurs when the air-hole is
Completely closed
Open
Partially closed
None of these
The cigarette lighter was invented by
Dobereiner
Robert Wilhelm Bunsen
Michel Faraday
Lavoiser
The acid present in ant is
Acetic acid
Formic acid
Malicacid
Latic acid
The flame deposits soot and is yellow in colour is
Flame less
Non-luminous flame
Luminous flame
Coloured flame
A metallic apparatus which supports the wire gauze is
Retort stand
Test tube stand
Clamp
Tripod stand
An apparatus used to crystallize and evaporate chemicals is
Glass rod
Watch glass
China dish
Tunnel