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प्रश्न
Name the hardest natural substance known.
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उत्तर
Diamond is the hardest natural substance known.
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संबंधित प्रश्न
Write structural formula of Methane.
State the type of bonding in the following molecule.
Water
Name the black substance of pencil. Will the current flow through the electrical circuit when we use the sharpened ends of the pencil to complete the circuit?
What type of bonds are present in CH4 molecule? Draw their electron-dot structures.
Why does carbon form compounds mainly by covalent bonding?
Name one covalent compound containing chlorine.
Draw the electron-dot structure of a hydrogen chloride molecule.
Draw the electron-dot structure of N2 and state the type of bonding.
A covalent molecule having a double bond between its atoms is:
(a) Hydrogen
(b) Oxygen
(c) water
(d) ammonia
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
What do you understand by lone pair and shared pair?
Draw an electron dot diagram to show the formation of the following compound.
Methane
Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them.
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
What is the difference between :
Ionic compounds and covalent compounds
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
The molecular masses of a carbon compound spread over a range of _______.
Write an Explanation.
Alkyne
Which of the following compound(s) possesses a high melting point?
Explain dipole (polar) molecule by taking hydrogen chloride as an example.
