INDICATORS

Which solution can turn phenolphthalein pink?

• Sodium hydroxide

• Vinegar

• Tomato

• Hydrochloric acid

Which solution would turn litmus red?

• Potassium hydroxide

• Sodium chloride

• HNO₃

• Ammonia

Which solution would turn litmus blue?

• HCl

• Citric fruits

• H₂SO₃

• NH₃

Phenolphthalein has a pink color in a solution that has a pH of

• 5

• 11

• 1

• 7

An unknown substance X gives brownish red stain on turmeric paper sheet. It also gives green colour in china rose solution. What is the nature of the substance?

• Acid

• Neutral

• Base

• Can't find with this data

A solution Y is colourless when phenolphthalein was added to it. It didn't change its colour even on turmeric paper. It didnot change the colour of blue litmus paper too. What is the nature of the substance Y?

• Acid

• Neutral

• Base

• Can't find with this data

What is the nature of the solution present in the beaker?

• Alkali

• Acidic

• Neutral

• Water

Tags

NGSS.MS-PS1-2

Which of the set of pH paper depicts that the dipped solution is highly acidic?

(compare with the pH scale and find out)

• 
• 
• 

Which type of solution is A and B respectively?

• Basic and acidic

• Acidic and basic

• Basic and neutral

• Acidic and neutral

Tags

NGSS.MS-PS1-2

When china rose indicator is added to soap solution, What colour change would happen?

• Dark pink

• Light pink

• Green

• No colour change