CHEMISTRY FORM4 -ACID, BASE AND SALTS

True or false: a neutral solution has equal amounts of H⁺ and OH^-.

• True

• False

In a neutralization reaction, what are the products of a reaction between an acid and a base?

• Another acid and base
• Carbon dioxide and a salt
• Water and a salt
• Either two acids or two bases

A substance is found to have the following characteristics:

Very bitter taste

Feels soapy to the touch

Produces OH^- ions when dissolved in water

In what category would the substance be classified?

• acid

• base

Basic oxide

• BaO

• P₂O₅

• ZnO

• CO₂

Acids are substances that release H⁺ ions when dissolved in water.

• True

• False

Alkalis are substances that produce OH^- ion when dissolved in water.

• True

• False

what happens when a solution of  an acid is mixed with a solution of a base in a test tube?a

• temperature of the solution increases 
• temperature of the solution decreases
• temperature remains constant
• no reaction

an aqueous soln turns red lithmus blue . excess addition of which of the following would reverse the change

• baking powder
• lime
• ammonium hydroxide solution
• HCL

during preparation of HCL gas on a humid day the gas is usually passed through the guardtube containing calcium chloride .The role of calcium chloride is 

• absorb the evolved gas
• moisten the gas
• absorb moisture from the gas
• absorb CL ions from the evolved gas

a sample of soil is mixed with water and allow to settle . The soln turns yellowish orange which of the foll soln will turn the colour to greenish blue 

• lemon juice
• vinegar
• common salt
• antacid