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Holme's signals can be given using :...

Holme's signals can be given using `:`

A

`CaC_(2)+CaCN_(2)`

B

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

C

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

D

`CaC_(2)+CaCO_(3)`

Text Solution

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The correct Answer is:
B
`CaC_(2)+H_(2)OrarrC_(2)H_(2)+CaO`
`Ca_(3)P_(2)+6H_(2)Orarr3Ca(OH)_(2)+2PH_(3)`
`PH_(3)` is flammable and catches fire due to this `C_(2)H_(2)` gas burns with dazzling flame.
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RESONANCE-P BLOCK ELEMENTS-PART -II
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  6. Freshly distilled colourless HI (aqueous solution) gradually turns bro...

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  8. Write is quantum mechanical liquid i.e. helium (II) ? Give its two imp...

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  9. Write down the formula of the noble gas species which are isostructura...

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  10. Distillation of HBr and HBrO3 yields bromine gas.

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  11. Pl3 on hydrolysis yields H3PO3 and HI

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  12. IO(3)^(-) + 6OH^(-)+Cl(2) to IO(6)^(5-) ("periodate")+3H2O+2Cl^(-)

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  13. HBr is a stronger acid than HI because of hydrogen bonding.

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  14. Bleaching powder does not show oxidising properties.

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  15. Noble gases are parmagnetic in nature.

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  16. Neon lights are visible even in fog and moist.

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  17. The high activity of fluorine is due to its …. Dissociation energy

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  18. The atomicity of all halogens is ….

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  19. Among halogen acids (hydrogen halides) ….. Is the strongest reducing a...

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