Which of the following indicators can be used to detect end point in the titration of a weak acid versus strong base?

The symbol for congruence is _________.

In&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>△</mo><mi>A</mi><mi>B</mi><mi>C</mi></math>, AB=AC and AD is perpendicular to BC. State the property by which&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>△</mo><mi>A</mi><mi>D</mi><mi>B</mi><mo>≅</mo><mo>△</mo><mi>A</mi><mi>D</mi><mi>C</mi></math>.

Which of the following criterion for congruency of triangles does not exist?

In the given figure, ΔQPS&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>≅</mo></math>&nbsp;SRQ. Find the value of x.<figure class="image"><img src="https://www.learncbse.in/wp-content/uploads/2019/06/Congruence-of-Triangles-Class-7-Extra-Questions-Maths-Chapter-7-Q17.png" alt="Congruence of Triangles Class 7 Extra Questions Maths Chapter 7"></figure>&nbsp;

Which of the following indicators can be used to detect end point in the titration of a weak acid versus strong base?

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