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(D) The $pH$ range $1-7$ represents acidic solutions,while the $pH$ range $7-14$ represents basic solutions.$I$. Black coffee: Acidic $(pH \approx 5)$

Vedclass · Accepted Answer

$4, 2$

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(D) The $pH$ range $1-7$ represents acidic solutions,while the $pH$ range $7-14$ represents basic solutions.$I$. Black coffee: Acidic $(pH \approx 5)$$II$. $0.2 \ M \ NaOH$: Basic $(pH > 7)$$III$. Lemon juice: Acidic $(pH \approx 2)$$IV$. Lime water $(Ca(OH)_2)$: Basic $(pH > 7)$$V$. Human saliva: Acidic $(pH \approx 6.5)$$VI$. Tomato juice: Acidic $(pH \approx 4)$Acidic solutions $(pH \ 1-7)$: $I, III, V, VI$ (Total $4$)Basic solutions $(pH \ 7-14)$: $II, IV$ (Total $2$)Therefore,the number of solutions is $4$ and $2$ respectively.

Observe the following solutions:
$I$. Black coffee
$II$. $0.2 \ M \ NaOH$
$III$. Lemon juice
$IV$. Lime water
$V$. Human saliva
$VI$. Tomato juice
The number of solutions having $pH$ range of $1-7$ and $7-14$,in the above list,is respectively.

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Observe the following solutions:$I$. Black coffee$II$. $0.2 \ M \ NaOH$$III$. Lemon juice$IV$. Lime water$V$. Human saliva$VI$. Tomato juiceThe number of solutions having $pH$ range of $1-7$ and $7-14$,in the above list,is respectively.