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Which is main constitutent of egg-shell?...

Which is main constitutent of egg-shell?

A

`CaCO_(3)`

B

`CaSiO_(3)`

C

`CaSO_(4).(1)/(2)H_(2)O`

D

`CaSO_(4).2H_(2)O`

Text Solution

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The correct Answer is:
A
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ALLEN-S-BLOCK ELEMENTS -EXERCISE
  1. There is loss in weight when mixture of Li(2)CO(3) and Na(2)CO(3).10H(...

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  2. Which of the following metal forms M(2)O(2) (peroxide)?

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  3. Which is main constitutent of egg-shell?

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  4. Baking powder contains:

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  5. A overset(Delta)rarrB (oxide) + CO(2) B + H(2)O rarr C C+ CO(2) ra...

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  6. A overset(Delta)rarrB (oxide) + CO(2) B + H(2)O rarr C C+ CO(2) ra...

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  7. A overset(Delta)rarrB (oxide) + CO(2) B + H(2)O rarr C C+ CO(2) ra...

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  8. A overset(Delta)rarrB (oxide) + CO(2) B + H(2)O rarr C C+ CO(2) ra...

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  9. Na(2)[Be(OH)(4)] is formed when:

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  10. Which is/are true statement(s) when metal carbides react with H(2)O?

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  11. Beryllium is placed above magnesium in the II group. Beryllium dust, t...

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  12. Potassium is kept in

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  13. Which of the following is not present in cement ?

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  14. A wire of an alkaline earth metal X, burnt in air and dipped in water,...

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  15. Which of the following statement is correct for s-block elements:

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  16. One element which is used in flash light in photography, when heated w...

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  17. The s-block hydride with covalent polymeric structure are

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  18. Assertion: Na(2)O(2) is coloured and paramagnetic Reason: Na(2)O(2) ...

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  19. Assertion: KHCO(3) can not be obtained by solvay process. Reason: KH...

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  20. Assertion: Mg can bum in the atmosphere of N(2). Reason: Mg reacts w...

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