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प्रश्न
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
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उत्तर
The atoms of elements undergo chemical bonding (or chemical combination) to attain the noble gas electronic configuration and become more stable. By chemical bonding, atoms share or transfer their electrons to make their outermost shells completely filled and thus attain stability.
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संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
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Show the formation of Na2O by the transfer of electrons.
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(a) Green
(b) Colourless
(c) Pink
(d) Blue
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Magnesium reacts with hot water.
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Write equation for the reaction of sodium with oxygen.
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Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
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An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
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(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na
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The substance that will be flattened on beating with a hammer is ______.
Find the odd one out:
