Acids bases and salts class 10

Which one of the following is acidic?

• Lemon juice

• Tomatoes

• Milk

• All

Which one of the following will turn red litmus blue?

• Vinegar

• Baking soda solution

• Lemon juice

• Soft drinks

Which one of the following will turn blue litmus red?

• Vinegar

• Lime water

• Baking soda solution

• Washing soda solution

Methyl orange is

• Pink in acidic medium, yellow in basic medium

• Yellow in acidic medium, pink in basic medium

• Colourless in acidic medium, pink in basic medium

• Pink in acidic medium, colourless in basic medium

Lime water is

• Cao

• Ca(OH)2

• CaCo3

• CaCl2

The nature of calcium phosphate is present in tooth enamel is

• Basic

• Amphoteric

• Acidic

• Neutral

Which of the following salts has no water of crystallization?

• Blue Vitriol

• Washing soda

• Baking soda

• Gypsum

The function of quick lime in soda lime mixture is to

• Absorb moisture present in soda lime

• Increase the efficiency of soda lime

• Increase the pH of soda lime

• Take part in reaction with NaOH

The Ph of a solution of HCL is 4. This shows that the molarity of the solution is

• 4.0M

• 0.4M

• 0.0001M

• 0.001M

The difference of molecules of water in gypsum and PoP is

• 5/2

• 2b

• 3/2

• ½