Chemistry

Q91

An ordinary mobile phone communicate by using___________?

Q93

To meet the educational needs of the people, the Madarasa-I Nasiri was built in the region of _________ ?

Q95

Which of the following statements about isotopes is correct?

Q97

The molecules of CO2 in dry ice form:

Q99

Day and night are the results of__________?

Q100

Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?

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