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Graphite is a good conductor of electricity because of
Each carbon atom in graphite is sp2 hybridized and forms three covalent bonds to create a lattice of hexagonal rings arranged in layers. Therefore each carbon atom in graphite is left with one free electron. These free electrons act as a charge carriers across the graphite crystal and make it a good conductor of electricity.
How many carbon atoms join to form spherical molecules in buckminsterfullerene?
Buckminsterfullerene is a spherical fullerene molecule with the formula C60. It is a cage-like fused-ring structure which resembles an association football made of twenty hexagons and twelve pentagons, with a carbon atom at the vertices of each polygon and a bond along each polygon edge.
Why does AlCl3 exist as a dimer?
Since the octet of aluminium atom is not complete in AlCl3, it dimerises by the formation of coordinate bonds, as the chlorine atoms donate the lone pair and the aluminium provides the empty p-orbital.
The order of increasing acidic strengths of BF3, BCl3 and BBr3 is:
The order of increasing acidic strengths of BF3, BCl3 and BBr3 is: BF3 < BCl3 < BBr3. The extent of back bonding is maximum in BF3 and minimum in BBr3.
The following question has four choices out of which ONLY ONE is correct. Detect the wrong statement regarding boron and silicon.
Both BF3 and SiF4 are Lewis acids. BF3 is electron deficient and SiF4 has empty d-orbitals where it can accommodate electron pairs.
Tin plague means
Tin pest or tin plague is an autocatalytic, allotropic transformation of the element tin, which causes deterioration of tin objects at low temperatures. Tin pest has also been called tin disease, tin blight or tin leprosy. This happens at very low temperatures, so white tin loses its crystalline structure and gets converted into grey powdered form.
The unique ability of carbon to form C = C, C ≡ C, C = S and C ≡ N bonds is due to its ability to form
The unique ability of carbon to form C = C, C ≡ C, C = S and C ≡ N bonds is due to its ability to form pπ – pπ bonding on account of its small size.
Property of catenation is the strongest in
Bond strength of M – M bond and tendency for catenation decrease in the order: C – C > Si – Si > Ge – Ge > Sn – Sn The greater the bond energy, the greater the strength of the bond.
Which of the following reactions results in the formation of water gas?
Water-gas is a mixture of carbon monoxide (CO) and hydrogen (H2) produced by passing steam over red-hot coke using the endothermic reaction C + H2O → CO + H2
Directions For Questions
The following question has four choices, out of which ONLY ONE is correct.
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Which of the following statements is correct?
The statement in option (1) is true. Owing to its large size, silicon cannot form pπ - pπ bonds with oxygen like carbon. Consequently, SiO2 forms a three-dimensional network structure, while carbon dioxide forms discrete linear molecules. The hybridisation of Si in SiO2 is sp3.
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