Advertisements
Advertisements
प्रश्न
List any five precautions taken care of while performing an experiment in a chemistry laboratory.
उत्तर
Five precautions to be taken in the laboratory are:
- Do not touch or taste any unknown substance.
- Use only a small quantity of chemicals to carry out an experiment.
- Do not work alone in the laboratory.
- Do not throw hot concentrated acids into the sink directly.
- Always wear an apron in the laboratory to protect your clothes.
- While heating keeps the mouth of the test tube away from your eyes and face.
- The apparatus to be used in an experiment should be arranged neatly before beginning an experiment.
- Do not throw broken glass apparatus or used filter paper in the sink. Throw them in a dustbin.
APPEARS IN
संबंधित प्रश्न
Mention one use of the following equipment
Gas jar
From what material is the following made up of?
Mortar and pestle
Label the marked equipment in the diagram given below.
Fill in the blank:
Experiment and _______are the two important basics of chemistry.
Choose the correct alternative from the options given for the following statement.
The evaporating dish is made of
Choose the correct alternative from the options given for the following statement.
The spirit lamp is made of
Choose the correct alternative from the options given for the following statement.
The apparatus to measure an accurate volume of liquid, is
Choose the correct alternative from the options given for the following statement.
To prevent the escape of a gas from a gas jar, you will cover its mouth with
Write true or false against the following statement and correct it if false.
A mortar and pestle are used for evaporation.
Write true or false against the following statement and correct it if false.
A round-bottom flask is used to store chemicals.
