Class 10 Acid and Base

(Q.) How does an acid taste? 

 (Q.) Name the acid found in (a) Soft drinks (b) Vinegar. 

 (Q.) Name the sodium compound which is used for softening hard water. 

 (Q.) Name three mineral acids. 

 (Q.) Write an equation to show the reaction between Plaster of Paris and water. 

 (Q.) What is an indicator? 

 (Q.) Define pH. 

 (Q.) What is an alkali? 

 (Q.) What is a base? 

 (Q.) What is the chemical name of washing soda? 

 (Q.) What is the common name of the compound CaOCl₂? 

 (Q.) Name the substance which on treatment with chlorine yields bleaching powder. 

 (Q.) What is an acid? 

 (Q.) What will happen if a solution of sodium hydrogen carbonate is heated? 

 (Q.) How does acetic acid (vinegar) help in the preservation of food? 

 (Q.) What is a salt? 

 (Q.) What do you mean by universal indicator? 

 (Q.) What is a neutralization reaction ? 

 (Q.) Why does distilled water not conduct electricity, whereas rainwater does?                                

 (Q.) Fresh milk has a pH 6. How do you think the pH will change as it becomes sour? 

 (Q.) What are acid & base indicators?

(Q.) Why does an aqueous solution of an acid conduct electricity?

 (Q.) How is concentration of hydroxide ions (OH^–) affected when excess of base is dissolved in a solution of sodium hydroxide? 

 (Q.) What is neutralization reaction? 

 (Q.) Why a substance is acidic or basic in nature? 

 (Q.) Why should curd and sour substances  not be kept in brass and copper vessels? 

 (Q.) A metal compound ‘X’ reacts with dilute hydrochloric acid to produce gas (Y). The gas (Y) evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. Write names of x & y.     

 (Q.) Which gas is usually liberated when an acid reacts with a metal?    Illustrate with an example. How will you test for the presence of this gas? 

 (Q.) You have given three test tubes, one of them contain distilled water and the other two contain an acid solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? 

(Q.) What is bleaching powder? How is it prepared? Write chemical equation involved in the preparation of bleaching powder. Write two uses of bleaching powder. 

 (Q.) A compound which is prepared from gypsum has a property of hardening when mixed with water. Identify the compound. Write the chemical equation of its preparation. Mention two uses of the compound. 

(Q.) What is baking soda? How is it produced? Write two uses of it.