Q. All noble gases are
1) colourless
2) colourless
3) colourless and odourless
4) light blue
Q. Alkali metals belong to the
1) s-block
2) p-block
3) d-block
4) f-block
Q. Alcohol Contains
1) nitrogen, hydrogen, oxygen
2) carbon, hydrogen, oxygen
3) oxygen, carbon, nitrogen
4) hydrogen, chlorine, oxygen
Q. Air is a/an
1) element
2) compound
3) mixture
4) colloid
Q. Absolute alcohol is
1) 100% proof
2) 95% alcohol and 5% water
3) 200% proof
4) rectified spirit
Q. A ß particle has
1) unit positive Charge
2) unit negative charge
3) no charge
4) two unit positive charge
Q. A single covalent bond
1) is formed by the transfer of 2 electrons
2) exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid
3) is longer than a double bond
4) does not require energy to disrupt it unlike an ionic bond
Q. A deficiency of this mineral can cause stretch marks in our skin; this mineral is
1) Zinc
2) Iron
3) Sodium
4) Magnesium
Q. A chemical used in photography is
1) sodium sulphate
2) sodium sulphite
3) sodium oxalate
4) sodium thiosulphate
Q. A Catalyst remains unchanged at the end of the reaction with regard to
1) Quality
2) chemical Composition
3) Physical State
4) Quantity and chemical composition
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