Chemistry Chapter 2 - Quiz

Which of the following steps are carried out after the data collection?

I Making observation

II Making conclusion

III Making hypothesis

IV Writing report

• I and III

• I and IV

• II and III

• II and IV

A student carries out an experiment to determine the rate of dissolving salt at different sizes.Which of the following apparatus is essential for the experiment?

• Conical flask

• Stopwatch

• Evaporating dish

• Bunsen burner

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• Positively charged sphere
• Negatively charged electrons scattered in the sphere

Which of the following scientist proposed the model?

• John Dalton

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

Atom P
Proton No: 6
Nucleon No: 14

What is the number of neutrons in atom P?

• 6

• 7

• 8

• 12

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Who discovered neutrons ?

• Neils Bohr

• James Chadwick

• J.J Thompson

• Ernest Rutherford

Which of the following is the temperature when a liquid changes to solid and heat is released?

• Melting temperature

• Boiling temperature

• Freezing temperature

• Cooling temperature

A patient is diagnosed with a damage in the thyroid gland. Which isotope is used to treat the patient?

• Copper-64

• Cobalt-60

• Carbon-14

• Iodine-131

Isotope is atoms of the same element that have the same proton number but different _________ numbers.

Why is carbon-12 chosen as the standard reference for relative atomic mass?

• Carbon has three isotopes

• Carbon is a non-metal element

• Carbon is a solid and easier to handle

• Carbon is in Group 14

Which of the following is FALSE about isotopes?

• Same nucleon number

• Same proton number

• Different number of neutrons

• Different number of electrons

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