Zadanie 9
Which species is best described by resonance structures? A. NO3− B. COCl2 C. CH3OH D. PF3
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Which species is best described by resonance structures? A. NO3− B. COCl2 C. CH3OH D. PF3
Which species is best described using resonance structures? A. NO3− B. H2S C. NF3 D. HCN
Which substance evaporates easily when pure and gives a strongly conducting solution in water? A. HBr B. KBr C. CH3Br D. NH3
Methyl orange is a synthetic dye that is used as an acid–base indicator. The absorption spectrum of methyl orange in acidic solution is shown. Identify the colour of the acidic solution and give a reason. Use section 15 of the data booklet.
Which substance is highly volatile in its pure state and gives a solution with high electrical conductivity in water? A. CH3Br B. KBr C. H2S D. HBr
Which substance has no intermolecular attraction other than London (dispersion) forces? A. ClF3 B. IF5 C. SeO2 D. SF6
Between the molecules of which substance do only London (dispersion) forces act? A. XeF4 B. SF4 C. ClF3 D. IF5
Which Lewis structure of SO2Cl2 is preferred on the basis of formal charges? A. Diagram A B. Diagram B C. Diagram C D. Diagram D
Which Lewis formula of the perchlorate ion, ClO4−, is preferred on the basis of the lowest formal charges? A. Four Cl–O single bonds B. One Cl=O double bond and three Cl–O single bonds C. Two Cl=O double bonds and two Cl–O single bonds D. Three Cl=O…
What are the hybridization of the carbon atom in carbon dioxide and the O-C-O bond angle? A. sp2 and 120° B. sp3 and 109.5° C. sp and 90° D. sp and 180°