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Give the scientific reasons: The valenc...

Give the scientific reasons:
The valency of carbon is 4.

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NAVNEET PUBLICATION-CARBON: AN IMPORTANT ELEMENT-EXERCISE
  1. Give scientific reasons: Graphite is not used in ornaments.

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  2. Limewater turns milky when CO2 is passed through it.

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  3. Give scientific reasons: Diamonds are used in rock drilling machines.

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  4. Give scientific reasons: Coke produces more heat than coal.

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  5. Give scientific reasons: Biogas is an eco-friendly fuel.

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  6. Give scientific reasons: Carbon dioxide is used in fire extinguishers...

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  7. Give scientific reasons: Methane is used as fuel.

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  8. Give the scientific reasons: The valency of carbon is 4.

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  9. Use your brain power Is the density CO2 more or less than that of air...

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  10. Distingusih between crystalline and amorphous solids.

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  11. Distinguish between Diamond and Graphite.

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  12. Describe the following chemical reactions giving their balanced equati...

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  13. Explain the following reactions with the help of balanced equations: ...

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  14. Explain the following reaction giving their balanced chemical equation...

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  15. Give balanced equation Methane burnt in air

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  16. Describe the following chemical reactions giving their balanced equati...

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  17. Complete the following chemical reactions: ……..+………. to CO2 +2H2O + H...

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  18. Complete the following chemical reactions: CH4 + Cl2 overset(light) ...

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  19. Complete the following chemical reactions: 2NaOH + CO2 rarr

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  20. Complete the following chemical reactions: Na2 CO3 +H2 O+CO2 to……….

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