| S.R. NO |
Questions |
Answers |
| 1 |
Antacids are – |
Base |
| 2 |
Goldsmiths uses aqua regia, which is prepared by mixing– |
Nitric acid and Hydrochloric acid |
| 3 |
pH value shows the Numeric value of – |
Analysing the acidic or basic nature of a solution |
| 4 |
The pH of a solution changes from 3 to 6. The H +ion concentration will – |
Decrease 1000 times |
| 5 |
What may be a possible pH value of, an acidic solution? |
6 |
| 6 |
Which acid is considered a basic chemical in Industry? |
H2SO4 |
| 7 |
Which acid is present in Acid Rain? |
Nitric acid |
| 8 |
An aqueous solution of copper sulphate is acidic in nature because the salt undergoes – |
Hydrolysis |
| 9 |
What is not a Lewis acid? |
NH3 |
| 10 |
Limewater is turned milky by – |
CO2 |
| 11 |
Sodawater obtained by passing carbon dioxide in water is – |
Acidic in nature |
| 12 |
Which acids do not contain oxygen – |
Hydrochloric Acid |
| 13 |
An unknown gas quickly dissolves in water. This the gaseous aqueous solution turns red litmus into blue. This gas produces a white flame with hydrogen chloride. This unknown gas is – |
Ammonia |
| 14 |
What is Neela Thotha? |
Copper Sulphate |
| 15 |
The chemical used for destroying fungi in water tank is – |
Copper Sulphate |
| 16 |
Blue vitriol is chemically – |
Copper sulfate |
| 17 |
Baking soda is – |
Sodium Bicarbonate |
| 18 |
The chemical formula of washing soda is – |
NaCO |
| 19 |
Quartz crystals used in clocks are – |
Silicon dioxide |
| 20 |
Which salt predominant in the ocean? |
Sodium Chloride |
| 21 |
Table salt (NaCl) is a product of – |
Strong acid and strong base |
| 22 |
Iodized salt contains – |
Potassium iodide |
| 23 |
What is untrue about bleaching powder? |
It is more soluble in water |
| 24 |
When eno salt is poured into the water, bubbles form, which is due to – |
CO2 gas |
| 25 |
To develop photographic plates – |
Sodium thiosulphate is used as an oxidizing agent |
| 26 |
The chemical used as a ‘fixer’ in photography is – |
Sodium thiosulphate |
| 27 |
The hypo solution used in photography is an aqueous solution of – |
Sodium thiosulphate |
| 28 |
The useful element in photography is – |
Silver Bromide |
| 29 |
Which substances is used in glazing the pottery? |
Zinc oxide |
