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Acids Bases And Salts

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Test Report

Acids Bases And Salts

Q1. The colour of neutral litmus solution is

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ANS

Red Blue Purple Yellow

Q2. Which of the following indicators is an olfactory indicator?

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ANS

Litmus Vanilla Turmeric Phenolphthalein

Q3. Which one is suitable method to find the accurate pH value?

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ANS

pH meter pH paper Universal indicator Litmus solution

Q4. Which one of the following statements is correct about universal indicator?

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ANS

It is a mixture of HCl and NaOH It is a mixture of many indicators It is a solution of phenolphthalein in alcohol It is a solution of phenolphthalein in water.

Q5. Metallic oxides are ________ in nature, but non-metallic oxides are __________ in nature. The information in which alternative completes the given statement?

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Neutral, acidic Acidic, basic Basic, neutral Basic, acidic

Q6. When a drop of unknown solution X is placed on a strip of pH paper, a deep red colour is produced. This sample is which one of these?

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ANS

NaOH

HCl

H2O

CH3COOH

Q7. A student tests a sample drinking water and reports its pH value as 6 at room temperature. Which one of the following might have been added in water?

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Calcium chloride Sodium chloride Sodium bicarbonate Bleaching powder

Q8.

Solid sodium bicarbonate was placed on a strip of pH paper. What happened to the colour of the strip?"

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ANS

Turned red Did not change Turned green and slightly yellow Turned pink