Which of the following values of ph will change blue litmus paper red?
a. 3.4
b. 7.0
c. 8.2
d. 12.6

a. 3.4

Explanation:

Blue litmus paper turns red under acidic conditions, that happens when pH of the solution goes below 4.5. Litmus paper is one of the oldest pH indicator, used to test materials for acidity.

Blue litmus does not change color under alkakine conditions, while red litmus paper does not change color under acidic conditions. Neutral litmus paper is purplish in color.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

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