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STD 12 - p -Block elements - ll — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - p -Block elements - ll4 Marks
MCQ
Holme's signals can be obtained by using
  • A
    $CaC_2 + CaCN_2$
  • ✓
    $CaC_2 + Ca_3P_2$
  • C
    $CaC_2 + CaCO_3$
  • D
    $Ca_3P_2 + CaCN_2$
✓

Answer

Correct option: B.
$CaC_2 + Ca_3P_2$
b
Holmes signal - A mixture of calcium carbide and calcium phosphide placed in a container which reacts with water to produce gases $\left( PH _3\right.$ and $\left.C _2 H _2\right)$ which burn and thus guide the ships in the sea.

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