أسئلة الكيمياء - الصف العاشر

What is the correct formula for the bromine molecule?

• Br2

• Br

• B2

• B

Which of the following alternatives is correct to describe the states of matter for halogens at room temperature and standard pressure?

• Solid, Liquid, Gas

• Liquid, Solid, Gas

• Liquid, Gas, Solid

• Gas, Liquid, Solid

What do you observe when iodine is displaced from its solution by chlorine?

• Precipitate

• Gas bubbles emitted

• The solution becomes darker

• The solution becomes lighter

What color do you expect for fluorine?

• Orange

• Yellow

• Red

• Brown

The statement that applies to astatine is:

• It has a smaller density than iodine

• It has a lower boiling point than iodine

• It displaces iodine from a solution containing iodide ions

• It has a higher melting point than iodine

What are the expected results of the student's experiment?

• Iodine, Water, Bromine

• Iodine, Water, Chlorine

• Bromine, Water, Chlorine

• Chlorine, Water, Iodine

What is the expected outcome for this student's experiment?

• A

• B

• C

• D

Which of the following materials is a poor conductor of electricity when molten?

• Sulfur

• Magnesium

• Lithium Chloride

• Potassium Oxide

Which of the following equations represents a redox reaction?

• CaCO3(s) → CaO(s) + CO2(g)

• Br2(aq) + 2NaI(aq) → 2NaBr(aq) + I2(aq)

• HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(aq)

• CuSO4(aq) + 2NaOH(aq) → Cu(OH)2(s) + Na2SO4(aq)

Which of the following materials can be used as an inert electrode during electrolysis?

• Aluminum

• Argon

• Copper

• Platinum