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प्रश्न
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
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उत्तर
These substances are covalent in nature because bonding between covalent substances are not as strong as ionic substances. So, covalent compounds hold together with weak forces and low melting point. This is why, they vapourise easily and give their odours. However, when ionic compounds comes in contact with air, they cannot give an odour by vapourising.
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संबंधित प्रश्न
Butanone is a four-carbon compound with the functional group:
Give appropriate scientific reasons for Carbon tetrachloride does not conduct electricity.
Fill in the following blank with suitable word:
The form of carbon which is known as black lead is ...........
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Fill in the blank in the following sentence:
The number of single covalent bonds in C2H2 molecule are ...........
Explain why covalent compounds have generally high melting points?
Draw the electron-dot structure of a hydrogen chloride molecule.
One of the following is not an allotrope of carbon. This is:
(a) diamond
(b) graphite
(c) cumene
(d) buckministerfullerene
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(a) C4H10
(b) C5H12
(c) C3H8
(d) C6H14
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?
Explain the following:
polar covalent compounds electricity.
Explain the following:
Non-polar covalent compounds are insoluble in water.
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A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
State the type of bond formed when the combining atom has small E.N. difference.
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Write the names of the hydrocarbons for the following structural formula.
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The I.U.P.A.C name of CH3CH2CH = CH2 is?

