GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Glucose test
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Protein test
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Litmus test
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Both a and c
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Detailed explanation-1: -The material is tested using litmus paper, which turns red if it’s acidic and blue if it’s alkaline, or basic. Litmus paper is red when the pH is less than 4.5 and blue when the pH is greater than 8.3. If the paper turns purple, the pH level is close to neutral.
Detailed explanation-2: -Blue litmus paper will turn from blue to red in an acid or it will stay blue in a base. Red litmus paper will turn from red to blue in a base or stay red in an acid.
Detailed explanation-3: -The main use of litmus is to test whether a solution is acidic or basic, as blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F).
Detailed explanation-4: -Litmus Paper Test for Acids and Bases Ideally, counting the number of these H+ ions in an aqueous solution is not possible. Hence, indicators are used to determine whether a solution is acidic or basic. In chemistry, the most commonly used test to identify a solution as acidic or basic is the litmus paper test.