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प्रश्न
Answer the following question in brief:
Why are most apparatus made of glass?
उत्तर
Most of the laboratory apparatus is made of glass because:
- glass is easy to clean.
- Glass is a transparent material and we can see through it clearly.
- It does not react with most of the chemicals used in experiments.
- Glass withstands high temperatures.
- Pyrex glass or borosil glass is a special type of glass which hardly expands on heating. Such glasses do not break even at high temperatures.
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संबंधित प्रश्न
Mention one use of the following equipment
Evaporating dish
Mention one use of the following equipment
Glass tube
Mention one use of the following equipment
Reagent bottle
From what material is the following made up of?
Test tube holder
List any five precautions taken care of while performing an experiment in a chemistry laboratory.
Fill in the blank:
_______ are used for grinding and crushing solid substances into a powder.
Match the words in Column A with their respective functions in Column B.
| Column A | Column B |
| (a) Iron stand | (i) To boil chemicals |
| (b) Test tube | (ii) To keep solution |
| (c) Funnel | (iii) To stir the solution |
| (d) Beaker | (iv) To support apparatus |
| (e) Glass rod | (v) To transfer the liquids |
Choose the correct alternative from the options given for the following statement.
The apparatus to measure an accurate volume of liquid, is
Write true or false against the following statement and correct it if false.
A test tube is used to test liquid chemicals.
Write true or false against the following statement and correct it if false.
A mortar and pestle are used for evaporation.
