To prevent the escape of a gas from a gas jar, you will cover its mouth with
A watch glass
CH 2 COMMON LABORATORY APPARATUS AND EQUIPMENTS
The apparatus to measure an accurate volume of liquid, is known as ?
Measuring cylinder
The spirit lamp is made of ?
Glass,brass and steel
The evaporating dish is made of ?
Porcelain
Glass apparatus is made of which glass ?
Pyrex or borosil glass
What is used for grinding and crushing solid substances into a powder ?
Mortar and pestle
What is used to hold the test tube while-it is heated ?
Test tube holder
A porcelain dish is used for?
Evaporation
List any five precautions taken care of while performing an experiment in a chemistry laboratory.
Five precautions to be taken in laboratory are:- Do not touch any unknown substance Do not put hot concentrated acids into the sink directly. Always wear an apron in the laboratory. Do not throw broken glass apparatus or used filter paper in the sink. While heating keep the mouth of test tube away from your …