Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?
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___ is the number of shells for elements of the 3rd period.
Organs having different structure and components but perform similar functions are called ______.
Isotopes have ______.
I. similar physical quantities and different chemical properties
II. different physical properties
III. similar chemical properties
Which group in the modern periodic table contains elements that are inert gases?
Which among the following statements are TRUE regarding synthetic fibre?
I. They melt after catching fire.
II. They are more durable.
III. They are prepared by a number of processes using petrochemicals.
The process of transferring of charge from a charged object to the earth is called ______________.
They come out at night without being called and are lost in the day without being stolen. What are they?
Stars are what that come out at night without being called and are lost in the day without being stolen.
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