Acid Bases and Salts

If a solution turns blue litmus to red, what colour will be observed if the same is placed on pH paper

• Green

• Blue

• Red

• None

Among the following, which is NOT a form of calcium carbonate

• Chalk

• Limestone

• Quick lime

• Egg shell

HCl + NaOH -----> ______ + H₂O

Define Olfactory Indicators.

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Rain water have pH

• =7

• <7

• >7

• ~7

The colour of phenolphthalein in acidic medium

• Pink

• Colourless

• Red

• Orange

Oranges have ______ acid present in it.

The gas which burns with a pop sound ( H2, CO2, CuSO4, CH4)

• H₂

• CH₄

• O₂

• CO₂

A solution of sodium carbonate has pH around 13. The nature of solution is

• Strongly Acidic

• Weakly alkaline

• Weakly Acidic

• Strongly alkaline

A student wants to make a basic salt. which of the following pairs of acid and base should he use.

• HCl + NaOH

• H₂CO₃ + NaOH

• HCl + NH₄OH

• H₂SO₄ + K0H