Home
Class 10
CHEMISTRY
Explain the following: (a) Sodium chlo...

Explain the following:
(a) Sodium chloride is an ionic compound which does not conduct electricity in solid
state whereas it does conduct electricity in molten state as well as in aqueous
solution.
(b) Reactivity of aluminium decrease if it is dipped in nitric acid.
(c) Metals like calcium and magnesium are never found in their free state in nature.

Text Solution

Verified by Experts

(a) In molten state, due to heat the electrostatic forces of attraction between the oppositely charged ions are overcome. So ions move freely and conduct electricity. In aqueous solution also ions are free and conduct electricity.
(b) Due to the formation of a coating of aluminium oxide or `Al_2O_3`
(c) Reactive metals like calcium and magnesium react easily with different elements and occur in the form of ores.
Promotional Banner

Topper's Solved these Questions

  • DIKSHA QUESTIONS

    OSWAL PUBLICATION|Exercise METALS AND NON-METALS (LONG ANSWER) |18 Videos

  • DIKSHA QUESTIONS

    OSWAL PUBLICATION|Exercise METALS AND NON-METALS (MULTIPLE CHOICE QUESTIONS)|10 Videos

  • DIKSHA QUESTIONS

    OSWAL PUBLICATION|Exercise METALS AND NON-METALS (VERY SHORT ANSWER) |13 Videos

  • CHEMICAL REACTIONS AND EQUATIONS

    OSWAL PUBLICATION|Exercise CASE-BASED MCQs |29 Videos

  • METALS AND NON - METALS

    OSWAL PUBLICATION|Exercise CASE - BASED MCQs|29 Videos

Similar Questions

Explore conceptually related problems

Explain why, a salt which does not conduct electricity in the solid state becomes a good conductor in molten state.

Give reasons for the following: Ionic compounds do not conduct electricity in solid state.

Give reasons for the following: Ionic compounds do not conduct electricity in solid state.

Explain the following NaCl is not a conductor of electricity in soild state whereas it does conduct electricity in aqueous solution as well as in molten state.

Explain the following (a) Reactivity of At decreases if it is dipped in HNO_(3) . (b) Carbon cannot reduce the oxides of Na or Mg. (c) mm is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state. (d) Iron articles are galvanised. (e) Metals like Na, K. Ca and Mg are never found in their free state in nature.

How will your demonstrate that the ionic compounds do not conduct electricity in the solid state and can do so in solution.