Arrange the following in increasing order of their $p H$ values:
NaOH solution, Blood, Lemon juice.

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Solution

More is the acidic substance less is the $p H$
As $N a O H$ solution is basic it has the highest $p H$ , Blood is slightly basic in nature, and lemon juice is acidic.

$∴$ Increasing pH order is, Lemon juice $<$ Blood $< N a O H$ solution

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Arrange the following in increasing order of their pH values:NaOH solution, Blood, Lemon juice.

More is the acidic substance less is the pHAs NaOH solution is basic it has the highest pH, Blood is slightly basic in nature, and lemon juice is acidic.∴ Increasing pH order is, Lemon juice < Blood <NaOH solution

Arrange the following in increasing order of their $p H$ values:
NaOH solution, Blood, Lemon juice.

More is the acidic substance less is the $p H$
As $N a O H$ solution is basic it has the highest $p H$ , Blood is slightly basic in nature, and lemon juice is acidic.

$∴$ Increasing pH order is, Lemon juice $<$ Blood $< N a O H$ solution