Posted on 27-01-2022 by Admin
Important SCIENCE CHEMISTRY )
10th science chemistry important questions for All Exam Railway
>> 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 .
>> Which agent is as ‘seed’ in artificial rain?
– Silver Iodide
>> Oxides of metals are .
>> During the process of ‘rusting’ , the weight of iron .
>> (metal) is liquid at room temperature.
>> What is the formula of common salt
>> What is the maximum number of electrons that a p-orbital can hold
>> What is used in fire extinguisher
– Sodium bicarbonate
>> What is the nature of metal oxides
>> Which gas burns with popping sound
>> Which metal is used for galvanization
>> What is the nature of bleaching powder
– Oxidising agent
>> Which is stored in Kerosene
>> Phenolphthalein gives which color in acidic medium
>> Which gas is used in cigarette lighters?
>> Biogas chiefly contains .
>> Chemical used as fixer in Photography is .
– Sodium thiosulphate
– Acetyl Salicylic Acid
>> is also known as ‘Stranger Gas.’
>> Natural rubber is a polymer derived from .