1- Gases used in welding are ?
Acetylene & Oxygen
2- Gases used by sea divers for breathing are ?
Oxygen & Helium
3- Best sources for Vitamin D are?
Sunlight & Fish liver
4- Zinc Phosphide is used as?
5- Fuse wire is made up of
Lead and Tin
6- Purest form of Iron is?
7- Radium is extracted from?
8- Which agent is as ‘seed’ in artificial rain?
9- Oxides of metals are ?
10- During the process of ‘rusting’ , the weight of iron ?
11- (metal) is liquid at room temperature?
12- What is the formula of common salt ?
13- What is the maximum number of electrons that a p-orbital can hold ?
14- What is used in fire extinguisher?
15- What is the nature of metal oxides ?
16- Which gas burns with popping sound ?
17- Which metal is used for galvanization ?
18- What is the nature of bleaching powder ?
19- Which is stored in Kerosene ?
20- Phenolphthalein gives which color in acidic medium ?
21- Which gas is used in cigarette lighters?
22- Biogas chiefly contains ?
23- Chemical used as fixer in Photography is ?
24- Aspirin is ?
Acetyl Salicylic Acid
25- Is also known as ‘Stranger Gas’ ?
26- Natural rubber is a polymer derived from ?