First slide

Alkynes

Question

Which of the statements are correct?

Easy

A

${Be}_{2} C + H_{2} O \to Marsh gas$
B

${Al}_{4} C_{3} + H_{2} O \to Gas is a content of CNG$
C

${CaC}_{2} + H_{2} O \to Gas is used for welding purpose with O_{2} gas$
D

${Ca}_{3} P_{2} + H_{2} O \to Gas is used in Holme signals with {CaC}_{2}$

Solution

$1. Gives {CH}_{4} (g), which is also called Marsh gas 2. It also gives {CH}_{4} (g), which is a constituent of CNG . 3. It gives acetylene (HC \equiv CH) gas with O_{2} used for welding. 4. It gives phosphine ({PH}_{3}) gas used in Holme's signal.$

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