| 1. | PH of H20 is ? | |
|
10
|
||
|
9
|
||
|
7
|
||
|
8
|
||
View Answer
Discuss in Forum
Report Question| 2. | What happens when a solution of an acid is mixed with a solution of a base in a test tube (i) Temperature of the solution decreases (ii) Temperature of the solution increases (in) Temperature of the solution remains the same (iv) Salt formation takes place ? | |
|
(ii) and (iv)
|
||
|
(ii) only
|
||
|
(i) and (iii)
|
||
|
(i) and (iv)
|
||
| 3. | Which of the following phenomena occurs when acid is mixed with water (a) Neutralization (b) Dilution (c) Ionization ? | |
|
Only (c) is correct
|
||
|
Only (b) is correct
|
||
|
(a) & (b) are correct
|
||
|
(b) & (c) are correct
|
||
| 4. | When copper oxide and dilute hydrochloric acid react, colour changes to ? | |
|
black
|
||
|
blue-black
|
||
|
bluish-green
|
||
|
white
|
||
| 5. | Lime water is ? | |
|
CaCI2
|
||
|
CaCO3
|
||
|
Ca(OH)2
|
||
|
CaO
|
||
| 6. | During the preparation of HCl gas on a humid day, the gas is usually passed through the guard tube containing CaCl?. The purpose of using CaCl? is ? | |
|
To absorb moisture from HCl gas
|
||
|
To Use it as a catalyst
|
||
|
To absorb HCl gas
|
||
|
To add moisture to the gas (HCl)
|
||
| 7. | When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to ? | |
|
absorb moisture from the gas
|
||
|
moisten the gas
|
||
|
absorb Cl– ions from the evolved gas
|
||
|
absorb the evolved gas
|
||
| 8. | Sodium hydroxide is a ? | |
|
strong acid
|
||
|
weak acid
|
||
|
strong base
|
||
|
weak base
|
||
| 9. | Which one of the following types of medicines is used for treating indigestion ? | |
|
Antiseptic
|
||
|
Antacid
|
||
|
Analgesic
|
||
|
Antibiotics
|
||
| 10. | An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ? | |
|
Lime
|
||
|
Hydrochloric acid
|
||
|
Baking powder
|
||
|
Ammonium hydroxide solution
|
||