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प्रश्न
Fill in the blank in the following sentence:
Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.
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उत्तर
Two atoms of the same element combine to form a molecule. The bond between them is known as a covalent bond.
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संबंधित प्रश्न
State the reason why carbon can neither form C4+ cations nor C4− anions but forms covalent compounds.
What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint – the eight atoms of sulphur are joined together in the form of a ring.)
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Which inert gas does the Cl atom in HCl resemble in electron arrangement?
Draw the electron-dot structure of NH3 and state the type of bonding.
Explain why, diamond can be used in rock drilling equipment but graphite cannot.
Out of KCl, HCl, CCl4 and NaCl, the compounds which are not ionic are:
(a) KCl and HCl
(b) HCl and CCl4
(c) CCl4 and NaCl
(d) KCl and CCl4
The organic compound prepared by Wohler from an inorganic compound called ammonium cyanate was:
(a) glucose
(b) urea
(c) uric acid
(d) vinegar
Draw all possile structural formulae of compound from their molecular formula given below.
C4H10
Observe the straight chain hydrocarbons given below and answer the following
questions :
i) Which of the straight chain compounds from A and B is saturated and unsaturated straight chains?
ii) Name these straight chains.
iii) Write their chemical formulae and number of – CH2 - units.
Give examples for the following:
Two gaseous polar compounds.
What do you understand by lone pair and shared pair?
Explain the following:
Covalent compounds have low melting and boiling point.
State the type of bond formed when the combining atom has zero E.N. difference.
What are Allotropes? Name any two allotropic forms of carbon. Give one use of it.
Number of valence electrons in a carbon atom is _______.
Write an Explanation.
Alkane
Give an example for each of the following statement
A compound in which two Covalent bonds are formed.
The correct structural formula of butanoic acid is -
State the reasons, why carbon cannot
- Lose four electrons to form C4+ cation and
- Gain four electrons to form C4- anion.
How does carbon overcome this problem to form compounds?
