MCQs 1 on chapter 10(S-Block Elements)11th Class

These are MCQs on chapter 10(S-Block Elements)11th Class. Practice MCQs to check your knowledge for Entrance examination like CBSE NEET etc

1. Alkali metals never occur free in nature becauase

• They are unstable
• They are very reactive chemically
• Their compounds with other elements are very stable
• None of these

2. Which of the following statement about the isolation of alkali metals is true?

• Alkali metals can be isolated by the reduction of their oxides by carbon
• Alkali metals can be prepared from their aqueous salt solutions by metal displacement method
• Alkali metals can be prepared by the electrolysis of their aqueous salt solutions.
• Alkali metals can be prepared by electrolysis of their fused chlorides

3. Alkali metals are generally prepared by

• Reduction of metal oxides with carbon
• Electrolysis of their anhydrous molten halides
• Reduction of halides with hydrogen
• Reduction of corressponding oxide with powered aluminium

4. Hot sodium metal is prepared by

• Electrolysis of aqueous solution of NaCl
• Electrolysis of aqueous solution of NaOH
• Electrolysis of molten NaCl
• None of these

5. Hot sodium hydroxide when treated with chlorides gives

• Sodium chloride and water
• Sodium chlorate and water
• Sodium choride, sodium chlorate and water
• None of the above

6. The alkali metals have an outer electronic configuration of

• ns²
• ns²np⁶
• ns¹
• ns²np¹

7. Which out of the following set of atomic numbers refers to that of alkali metals ?

• 1, 12, 30, 4, 62
• 37, 19, 3, 55
• 9, 17, 35, 53
• 12, 20, 56 ,88

8. Which of the following sodium halides has the highest melting point?

• NaF
• NaCl
• NaBr
• NaI

9. The Largest ionic radii in water is of

• K⁺
• Cs⁺
• Na⁺
• Li⁺

10. The metallic lustre exhibited by sodium is explained by the presence of

• free protons
• Na⁺ ions
• Conduction Electrons
• a body-centred cubic lattice

MCQs on chapter 10(S-Block Elements) =>

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