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प्रश्न
What is the difference between :
Ionic compounds and covalent compounds
उत्तर
Ionic compounds, made up of ions, are generally crystalline solids with high melting and boiling points.
They are soluble in water and good conductors of electricity in aqueous solution and molten state.
Covalent compounds, made up of molecules, can exist as soft solids or liquids or gases with low melting and boiling points. They are generally insoluble in water and poor conductors of electricity.
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संबंधित प्रश्न
Explain why carbon forms compounds mainly by covalent bond.
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A.
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?
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Choose and write the correct option.
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Write a short note.
Aromatic hydrocarbons
Which of the following is the purest form of carbon?
Cation is formed when ______.
