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प्रश्न
The pencil leads are made of mainly:
(a) lithium
(b) charcoal
(c) lead
(d) graphite
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उत्तर
graphite
The pencil leads are mainly made of graphite.
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संबंधित प्रश्न
Explain why carbon forms compounds mainly by covalent bond.
Butanone is a four-carbon compound with the functional group:
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
Why are most carbon compounds poor conductors of electricity?
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
Explain why, graphite can be used as a lubricant but diamond cannot.
State any two uses of graphite.
Buckminsterfullerene is an allotropic form of the element:
(a) phoshorus
(b) fluorine
(c) carbon
(d) sulphur
Which of the following cannot exhibit isomerism?
(a) C4H10
(b) C5H12
(c) C3H8
(d) C6H14
Define a covalent bond.
Match the pairs.
| Group 'A' | Group 'B' |
| a. C2H6 | 1. Unsaturated hydrocarbon |
| b. C2H2 | 2. Molecular formula of an alcohol |
| c. CH4O | 3. Saturated hydrocarbon |
| d. C3H6 | 4. Triple bond |
Draw all possile structural formulae of compound from their molecular formula given below.
C4H10
Choose the correct answer from the options given below
Which one is not example of polar covalent compound?
The particles present in strong electrolytes are
Electrons are getting added to an element Y:
which electrode will Y migrate to during the process of electrolysis?
Explain why carbon tetrachloride does not dissolve in water.
Name the types of Hydrocarbons.
List two differences between the properties exhibited by covalent compounds and ionic compounds.
Cation is formed when ______.
Non-polar covalent compounds are ______ conductors of heat and electricity.
