Identifying fibres burining test:
If is smells like burining paper, what is the yarn?

Identifying fibres burining test: If is smells like burining hair, what is the yarn?

Identifying fibres – burning test.

Identifying fibres burining test: If the yarn melts in the flame, what is the yarn?

‘X’ is fibre. It gives smell like burning of paper in burning test and it is an artificial fibre. ‘X’ may be

In “Identification of fibres – Burning test activity what are the precautions to be taken.

What did you do to know whether artificial fibres give pungent smell while burning? Write the steps of your experiment.

Collect the salt samples like sodium chloride, aluminium chloride, copper sulphate, sodium acetate, ammonium chloride, sodium hydrogen carbonate and sodium carbonate. Dissolve them in distilled water. Check the action of these solutions with litmus papers. Find the pH using pH paper. Classify them into acidic, basic or neutral salts. Identify the acid and base used to form the above salts. Record your observations in table

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. (a) What will be the action of gas on (i) dry litmus paper? (ii) moist litmus paper? (b) Write a balanced chemical equation for the reaction taking place.

What is the relation between finger -like structures and paper folds?

You are provided with three test tubes containing distilled water, an acid and a base solution respectively. If you are given only blue litmus paper, how do you identify the contents of each test tube ?