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Holme's signals produce burning gases wh...

Holme's signals produce burning gases which serve as a signal to the approaching ships contains.

A

`CaC_(2)+CaCN_(2)`

B

`CaC_(2)+Ca_(3)P_(2)`

C

`CaC_(2)+CaCO_(3)`

D

`Ca_(3)P_(2)+CaCN_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
The spontaneous combination of phosphine is technically used in Holme's samples. Containers containing calcium carbide and calcium phosphide are pierced and thrown in the sea when the gases evolved burn and serve as a signal.
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RESONANCE ENGLISH-P BLOCK ELEMENTS-Exercise 2 part 2 OBJECTIVE
  1. White phosphorus may be removed from red phosphorus by :

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  2. Red phosphorus may be prepared from white phosphorus by :

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  3. Holme's signals produce burning gases which serve as a signal to the a...

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  4. Phosphorus trichloride, PCl(3) undergoes, hydrolysis at room temperatu...

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  5. Ortho phosphoric acid on heating above 300^(@)C gives :

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  6. 1 mol of H(3)PO(2), H(3)PO(3) and H(3)PO(4) will neutralise x mol NaOH...

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  7. At 200^o C, hydrogen molecules have velocity 3.4 × 10^4cm s^(−1) . T...

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  8. At 200^o C, hydrogen molecules have velocity 4 × 10^4cm s^(−1) . The...

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  9. At 200^o C, hydrogen molecules have velocity 5 × 10^4cm s^(−1) . The...

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  10. Which of the following reactions does not produce oxygen ?

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  11. The gases respectively absorbed by alkaline pyrogallol and oil of cinn...

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  12. Alkaline KIis oxidised by ozone to :

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  13. At 200^o C, hydrogen molecules have velocity 7 × 10^4cm s^(−1) . The...

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  14. What is the mass of photon of sodium light having a wavelength of 5890...

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  15. What is the mass of photon of sodium light having a wavelength of 4880...

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  16. When H(2)S is passed through nitric acid and acidified KMnO(4) solutio...

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  17. Consider the following compounds : (i) sulpher dioxide (ii) hydrog...

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  18. When an article is bleached by SO(2) it loses its colour. The colour c...

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  19. What is the mass of photon of sodium light having a wavelength of 6980...

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  20. The atomic number of an element is 17. The number of orbitals containi...

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