MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions
A compound ‘X’ upon reaction with H2O produced a colourless gas ‘Y’ with rotten fish smell. Gas ‘Y’ is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound ‘X’ (NEET (Odisha)2019)
A.Ca3P2✓ Correct
B.NH4Cl
C.As2O3
D.Ca3(PO4)2
Explanation
The road map of given problem is 2 4 3 2 ‘X’ H O ‘Y’ colourless Rotten fish smell CuSO Cu P Product -> As compound ‘X’ Products a colourless gas ‘Y’ with rotten fish smell, X can be Ca3P2(calcium phosphide). The reaction takes place as follows: Ca3P2 + H2O -> Ca(OH)2 + PH3 Colourless gas with rotten fish smell. ‘Y’ 3 2 2 4 'Y' 4 3 CuSO S Cu P O P H H ->
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