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Chemistry and Biology Basics Quiz

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Questions and Answers

What is a homogeneous mixture?

A mixture where the components are evenly distributed (correct)

A mixture with visible different phases

A mixture with settling of components over time

A mixture where the components can be easily separated

Which drug is commonly used in Cancer therapy?

Insulin

Aspirin

Penicillin

Chemotherapy drugs (correct)

What is the difference between Precision and Accuracy?

Precision refers to how close a measurement is to the actual value, while Accuracy refers to the reproducibility of results. (correct)

Precision refers to random errors, while Accuracy refers to systematic errors.

Precision refers to how close a measurement is to the actual value, while Accuracy refers to random errors.

Precision refers to systematic errors, while Accuracy refers to how close a measurement is to the actual value.

What is the relation between Kelvin scale and Celsius scale?

K = °C + 273 Signup and view all the answers

Which device is used in the laboratory to measure the volume of liquids or solutions?

Pipette Signup and view all the answers

What is the characteristic property of gases among solids, liquids, and gases?

No definite volume or shape Signup and view all the answers

What is the oxidation number of oxygen in potassium superoxide (KO2)?

+1 Signup and view all the answers

Which two decomposition reactions are NOT redox reactions?

NH4NO3 -> N2 + 2H2O Signup and view all the answers

Which reaction involves an element existing in at least three oxidation states?

Disproportionation Reaction Signup and view all the answers

What is the correct oxidation number of sulphur in tetrathionate ion (S2O6^2-)?

+4 Signup and view all the answers

Which statement about halogens' displacement reactions in aqueous solutions is true?

They involve the displacement of a halogen by another halogen. Signup and view all the answers

Which is not true about Boyle's Law?

It describes the behavior of ideal gases only. Signup and view all the answers