Related questions with answers

Rank the following compounds in order of increasing acidity.

a. NH3,H2O,HFb.HBr,HCl,HFc. H2O,H3O+,HOd.NH3,H2O,H2Se. CH3OH,CH3NH2,CH3CH3f.HCl,H2O,H2Sg. CH3CH2CH3,ClCH2CH2OH,CH3CH2OHh. HCCCH2CH3,CH3CH2CH2CH3,CH3CH=CHCH3\begin{array} { l } { \text {a. } \mathrm { NH } _ { 3 } , \mathrm { H } _ { 2 } \mathrm { O } , \mathrm { HF } } \\ { \mathrm { b } . \mathrm { HBr } , \mathrm { HCl } , \mathrm { HF } \\ \text {c. } \mathrm { H } _ { 2 } \mathrm { O } , \mathrm { H } _ { 3 } \mathrm { O } ^ { + } , \mathrm { HO } ^ { - } } \\ { \mathrm { d } . \mathrm { NH } _ { 3 } , \mathrm { H } _ { 2 } \mathrm { O } , \mathrm { H } _ { 2 } \mathrm { S } \\ \text {e. } \mathrm { CH } _ { 3 } \mathrm { OH } , \mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 } , \mathrm { CH } _ { 3 } \mathrm { CH } _ { 3 } } \\ { \mathrm { f } . \mathrm { HCl } , \mathrm { H } _ { 2 } \mathrm { O } , \mathrm { H } _ { 2 } \mathrm { S } \\ \text {g. } \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 3 } , \mathrm { ClCH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH } , \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } } \\ { \text {h. } \mathrm { HC } \equiv \mathrm { CCH } _ { 2 } \mathrm { CH } _ { 3 } , \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 3 } , \mathrm { CH } _ { 3 } \mathrm { CH } = \mathrm { CHCH } _ { 3 }} \end{array}

Question

If the underlined verb in each of the following sentences does not agree with the subject, write the correct form of the verb above it If the verb form is already correct, write C above It.

The acidity or alkalinity of a solution are\underline{\text{are}} expressed as a pH value.

Solution

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Subjects connected with "and" use a plural verb, whereas subjects connected with “or” take a singular verb.

If there are two or more subjects, the verb agrees with the subject closest to it.

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