Science Practice Quiz 28

Q1.Which of the following metals is implied to be liquid at or near room temperature due to its ability to melt on a palm?

A. Sodium B. Potassium C. Caesium D. Lithium

Q2.What color flame is observed when magnesium burns in air?

A. Dazzling white B. Bright yellow C. Pale blue D. Crimson red

Q3.What is the general product formed when almost all metals combine with oxygen?

A. Metal hydroxides B. Metal carbonates C. Metal oxides D. Metal nitrides

Q4.What is the color of copper(II) oxide formed when copper is heated in air?

A. Red B. Green C. Black D. Blue

Q5.In general, what is the nature of metal oxides?

A. Acidic B. Basic C. Neutral D. Amphoteric

Q6.Which of the following best defines amphoteric oxides?

A. Metal oxides that are insoluble in water. B. Metal oxides that react only with acids to produce salts and water. C. Metal oxides that react with both acids as well as bases to produce salts and water. D. Metal oxides that dissolve in water to form alkalis.

Q7.Which of the following are examples of amphoteric oxides?

A. Sodium oxide and Potassium oxide B. Copper(II) oxide and Magnesium oxide C. Aluminium oxide and Zinc oxide D. Iron oxide and Calcium oxide

Q8.What is the general solubility of most metal oxides in water?

A. Highly soluble B. Slightly soluble C. Insoluble D. Forms acids

Q9.Which of the following metal oxides dissolve in water to produce alkalis?

A. Aluminium oxide and Copper(II) oxide B. Zinc oxide and Magnesium oxide C. Sodium oxide and Potassium oxide D. Iron oxide and Lead oxide

Q10.When aluminium oxide reacts with sodium hydroxide (NaOH), what is the name of the sodium-containing product formed?

A. Sodium chloride B. Sodium aluminate C. Sodium hydroxide D. Sodium oxide

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Science Practice Quiz 28