Which one of the following is the most characteristic property of an element?
Atomic number is the fundamental properties of an element. Every atom is identified by its unique atomic number. Atomic number is equal to the number of protons present in an atom of the element.
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Which of the following pairs is INCORRECT?
I. Haematite : Iron
II. Pitchblende : Copper
III. Monazite : Thorium
The most reactive of the following metals is
Which of the following statements are CORRECT?
I. Melamine is a Thermo setting plastic.
II. It resists fire.
III It is a poor conductor of heat.
The electronic dot and cross structure of ethene is ............
Which of the following statement(s) is/are CORRECT?
I. Bases are soapy to touch.
II. Bases generate OH– ions.
III. Metal oxides dissolve in water to form Acidic solution.
Which of the following statement(s) is/are INCORRECT?
I. Alkenes are fairly unreactive.
II. Alkenes burn with blue flame.
III. Alkanes burn with yellow flame.
Among the given nutrients, milk is a poor source of
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