A. Trigonal B. Tetrahedral C. Linear D. None of these
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A. Differ only in the arrangements of electrons B. Differ only in the number of paired and unpaired electrons C. Differ much in their energy content D. None of these
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A. An unpaired electron B. A lone pair of electron C. An overall positive charge D. An overall negative charge
A. Free radicals B. Carbocation C. Carbenes D. None of these
A. Carbonation B. Free radical C. Carbanions D. Carbenes
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A. Boron B. Thallium C. Aluminium D. All of these
A. Cryolite B. Mica C. Corundum D. Carnalite
A. Atomic size of Al< Mg B. Atomic size of MgMg
A. Aluminium oxide is highly stable B. Aluminium oxide is reactive C. Reducing agents contaminate D. The process pollutes the environment.
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A. Carbon B. Silicon C. Germanium D. Lead