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प्रश्न
Fill in the blanks in the following sentence:
In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.
उत्तर
In forming an oxygen molecule, two electrons are shared by each atom of oxygen.
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संबंधित प्रश्न
Why are most carbon compounds poor conductors of electricity?
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
Name the hardest natural substance known.
What type of bonds are present in H2 molecule? Draw their electron-dot structures.
What is the atomic number of carbon. Write its electronic configuration.
What is a covalent bond?
will CS2 conduct electricity or not?
give reason for your choice.
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 |
Explain the following term with example.
Hetero atom in a carbon compound
Write answer as directed.
What causes the existance of very large number of carbon compound ?
What do you understand by lone pair and shared pair?
Explain the following:
Polar covalent compounds are good conductors of electricity.
Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.
Which of the following is a common characteristic of a covalent compound?
Electrons are getting added to an element Y:
Is Y getting oxidised or reduced?
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
Name the anion present in the following compound:
When a barium chloride solution is added to a solution of compound B, a white precipitate insoluble in dilute hydrochloric acid is formed.
What are Allotropes? Name any two allotropic forms of carbon. Give one use of it.
Give an example for each of the following statement.
Formation of coordinate covalent bond between NH3 ➝ BF3 molecules
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
