List any five precautions to be taken while performing an experiment in a chemistry laboratory.

Explain the precautions that should be taken while measuring length using a ruler

Give any four precautions taken by a student to perform an experiment to determine the resultant resistance of two resistors when connected in series.

Give any four precautions taken by a student to perform an experiment to determine the resultant resistance of two resistors when connected in series.

Give one precaution that should be taken while handling switches.

List any four safety precautions to be followed in a chemistry laboratory.

List any five points to describe the importance of the atmosphere.

Using the principle of Wheatstone Bridge, describe the method to determine the specific resistance of a wire in the laboratory. Draw the circuit diagram and write the formula used. Write any two important precautions you would observe while performing the experiment.

What would you duggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and woltmeter do not coincide with the zero marks on the scales when circuit is open? No extra ammeter/voltmeter is available in the laboratory.

In the laboratory preparation of nitric acid from -KNO_(3) or NaNO_(3) state (i) the acid used (ii) the type of apparatus used (iii) the precautions to be taken during the preparation (iv) the method of collection of the acid (v) the method of identification of the product i.e acid fromed.

Mention two important precautions that should be taken while handling radioactive materials