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प्रश्न
What type of bond is present in methane (CH4)?
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उत्तर
The chemical bond in methane (CH4) is covalent, as a carbon atom shares its four valence electrons with four hydrogen atoms to form a methane molecule.
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संबंधित प्रश्न
Give appropriate scientific reasons for Carbon tetrachloride does not conduct electricity.
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.
State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C)
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give reason for your choice.
Draw the electron-dot structure of H2O compound and state the type of bonding.
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
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| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
An element A has 4 valence electrons in its atom whereas element B has only one valence electron in its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed? Give its electron-dot structure.
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 term with example.
Covalent bond
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Cl2 is a non polar molecule, while HCl is a polar molecule.
Fill in the blank with correct word from the bracket.
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Compare the compounds carbon tetrachloride and sodium chloride with regard to solubility in water and electrical conductivity.
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If B is a diatomic gas, write the equation for the direct combination of A and B to form a compound.
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
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| Element | Electronic Structure |
| P | 2, 6 |
| Q | 2, 8, 1 |
| R | 2, 8, 7 |
| S | 2, 8, 8 |
- Identify which element(s) will form covalent bonds with carbon.
- “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.
