acids and bases class test

The correct of making a solution of acid in water is 

• add water to acid
• add acid to water
• mix acid and water simultaneously
• add water to acid in a shallow container

products of a neutralisation reaction are always

• an acid and a base
• an acid and a salt
• salt and water
• salt and base

turmeric is a natural indicator . on adding it paste to acid and base separately,which colors would be observed?

• yellow in both acid and base
• yellow in acid and red in base
• pink in acid and yellow in base
• red in acid and blue in base

phenolphthalein is a synthetic indicator and its colors in acidic and basic solutions,respectively are

• red and blue
• blue and red
• pink and colorless
• colorless and pink

when the soil is too basic plants do not grow well in it to improve its quality what must be added to the soil?

• organic matter
• quick lime
• slaked lime
• calamine solution

litmus is a natural dye is an extract of which of the following?

• china rose
• beetroot
• lichen
• blueberries

neutralisation reaction is 

• physical and reversible change
• physical change that cannot be reversed
• chemical and reversible change
• chemical change that cannot be reversed

a solution changes the color of turmeric indicator from yellow to red the solution is

• basic 
• acidic 
• neutral
• either neutral or acidic

which of the following set of substance contain acids

• grapes,limewater
• vinegar,soap
• curd,milk of magnesia
• curd,vinegar

which of the following is an acid-base indicator?

• vinegar
• limewater
• turmeric
• bakingsoda