2021-09-18 12:15:13
Important SCIENCE (CHEMISTRY )
. Gases used in welding are ?
– Acetylene & Oxygen
Gases used by sea divers for breathing are ?
– Oxygen & Helium
. Best sources for Vitamin D are?
– Sunlight & Fish liver
Zinc Phosphide is used as?
– Rat Poison
. Fuse wire is made up of
– Lead and Tin
Purest form of Iron is?
– Wrought Iron
Radium is extracted from .
– Pitchblende
Which agent is as ‘seed’ in artificial rain?
– Silver Iodide
. Oxides of metals are .
– Alkaline
During the process of ‘rusting’ , the weight of iron .
–Increases
(metal) is liquid at room temperature.
– Mercury
What is the formula of common salt
– NaCl
. What is the maximum number of electrons that a p-orbital can hold
– 6
. What is used in fire extinguisher
– Sodium bicarbonate
What is the nature of metal oxides
– Basic
. Which gas burns with popping sound
– Hydrogen
Which metal is used for galvanization
– Zinc
. What is the nature of bleaching powder
– Oxidising agent
Which is stored in Kerosene
– Sodium
Phenolphthalein gives which color in acidic medium
– Colorless
Which gas is used in cigarette lighters?
– Butane
. Biogas chiefly contains .
– Methane
. Chemical used as fixer in Photography is .
– Sodium thiosulphate
Aspirin is
– Acetyl Salicylic Acid
is also known as ‘Stranger Gas.’
– Xenon
Natural rubber is a polymer derived from .
– Isoprene
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