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Chemistry Quiz on Metals

Authored by Sethu Ram

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Chemistry Quiz on Metals
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26 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gold is soluble in which of the following:

silver

iron

Aquarezia

Mercury

Answer explanation

Gold is soluble in Aquarezia, which is a mixture of hydrochloric and nitric acids, commonly used to dissolve noble metals. The other options, silver, iron, and mercury, do not dissolve gold.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

.......... is the most ductile metal.

Cu

Al

Au

Zn

Answer explanation

Gold (Au) is the most ductile metal, capable of being drawn into extremely thin wires. It surpasses other metals like copper (Cu), aluminum (Al), and zinc (Zn) in ductility, making it the correct answer.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Chemical formula K2SO4 represents. . . . . . . .

potassium nitrate

potassium chloride

Potassium sulphate

Aluminium sulphate

Answer explanation

The chemical formula K2SO4 indicates that it contains two potassium (K) ions, one sulfate (SO4) ion, making it potassium sulphate. The other options do not match this composition.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following metals reacts quickly with cold water?

Potassium

Aluminium

zinc

iron

Answer explanation

Potassium reacts vigorously with cold water, producing hydrogen gas and heat. In contrast, aluminium, zinc, and iron react much more slowly or not at all with cold water, making potassium the correct choice.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The chemical symbol K of ....... is derived from the Latin word 'Kalium'.

argentum

Vulfrem

stannum

potassium

Answer explanation

The chemical symbol K stands for potassium, which comes from the Latin word 'Kalium'. The other options, such as argentum (silver), Vulfrem (tungsten), and stannum (tin), do not relate to the symbol K.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is used for water purification?

vinegar

baking soda

alum

tartaric acid

Answer explanation

Alum is commonly used in water purification processes as a coagulant. It helps to remove impurities and clarify water, making it the correct choice among the options provided.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following can be used for purification of water?

Nitrogen

Alum

Sodium

Carbon

Answer explanation

Alum is commonly used for water purification as it helps in coagulating impurities, making them easier to remove. Nitrogen, sodium, and carbon do not serve this purpose effectively.

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