1. The hottest part of the gas flame is known as ......
ANS:- Non luminous zone
2. The alloy used to produce permanent magnet is ........
ANS:- Alnico
3. Chemically baking soda is ...............
ANS:- Sodium bicarbonate
4. Who discovered vulcanization?
ANS:- Charles Goodyer
5. Alloy containing mercury is known as ........
ANS:- Amalgam
6. The chemical which has the worest smell in the world?
ANS:- Methyl mercaptan
7.The element added to matchstick is ..............
ANS:- Red Phosphorus
8. Indigo is used in which industries?
ANS:- Dyeing Industry
9. Hypo used in photography is chemically......
ANS:- Sodium thiosulphate
10. The purity of primary gold is ........
ANS:- 24 carat
11. The nature of saliva is ..........
ANS:- Amphoteric
12.The term 'pH' denotes the..........
ANS:- Acidity or basicity of solution
13. The greatest number of compounds are formed by the element?
ANS:- carbon
14. If sodium salt is used in fire works, the colour imparted is .........
ANS:- Bright yellow
15.What is dry ice?
ANS:- Sodium carbon dioxide
16.The first artificial element from?
ANS:- Technitium
17.Alluminium is extracted from?
ANS:- Bauxite
18. Sea gets heated up and colled down slower than the land because......
ANS:- water has a higher specif heat
19.The element 30Si14; 31P15 and 32S16 are called .......
ANS:- Isotones
20.Aquaregia is a mixture of hydrochloric acid and nitric acid in the ratio of ........
ANS:- 3:1
ANS:- Non luminous zone
2. The alloy used to produce permanent magnet is ........
ANS:- Alnico
3. Chemically baking soda is ...............
ANS:- Sodium bicarbonate
4. Who discovered vulcanization?
ANS:- Charles Goodyer
5. Alloy containing mercury is known as ........
ANS:- Amalgam
6. The chemical which has the worest smell in the world?
ANS:- Methyl mercaptan
7.The element added to matchstick is ..............
ANS:- Red Phosphorus
8. Indigo is used in which industries?
ANS:- Dyeing Industry
9. Hypo used in photography is chemically......
ANS:- Sodium thiosulphate
10. The purity of primary gold is ........
ANS:- 24 carat
11. The nature of saliva is ..........
ANS:- Amphoteric
12.The term 'pH' denotes the..........
ANS:- Acidity or basicity of solution
13. The greatest number of compounds are formed by the element?
ANS:- carbon
14. If sodium salt is used in fire works, the colour imparted is .........
ANS:- Bright yellow
15.What is dry ice?
ANS:- Sodium carbon dioxide
16.The first artificial element from?
ANS:- Technitium
17.Alluminium is extracted from?
ANS:- Bauxite
18. Sea gets heated up and colled down slower than the land because......
ANS:- water has a higher specif heat
19.The element 30Si14; 31P15 and 32S16 are called .......
ANS:- Isotones
20.Aquaregia is a mixture of hydrochloric acid and nitric acid in the ratio of ........
ANS:- 3:1
-->
Post A Comment:
0 comments: