Which of the following statements is not correct regarding $CO$?
- A$CO$ is a powerful reducing agent.
- B$CO$ forms a stable complex with haemoglobin,which is $300$ times more stable than the oxygen-haemoglobin complex.
- C$CO$ reduces alkali metal oxides to alkali metals.
- D$CO$ is a neutral oxide.
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Assertion $(A)$: The maximum covalency of $Si$ and $Ge$ is $6$ but that of carbon is $4$.
Reason $(R)$: Due to the presence of $d$-orbitals in $Si$ and $Ge$,both these elements can undergo $sp^3d^2$ hybridisation and covalency of $6$ is possible. Carbon has no $d$-orbitals in it and hence its covalency is $4$.
The correct answer is:
Reason $(R)$: Due to the presence of $d$-orbitals in $Si$ and $Ge$,both these elements can undergo $sp^3d^2$ hybridisation and covalency of $6$ is possible. Carbon has no $d$-orbitals in it and hence its covalency is $4$.
The correct answer is:
$C_{60}$ contains which of the following?
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View SolutionWhich of the following has the lowest melting point?
The oxidation state shown by silicon when it combines with strongly electropositive metals is
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View SolutionIons consisting of two or more atoms which have properties similar to halide ions and contain at least one nitrogen atom are called ........
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