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Chemistry

Chemistry
Which of the following gases will effuse out of football bladder most quickly ?

N 2
H2
He
O2

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Chemistry
The presence of Cobalt in Vitamin B12 was established for the first time by

Sodium Nitroprusside test
Spectroscopy
Borax-Bead test
Hydrolysis test

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Chemistry
Choose the incorrect statement pertaining to organic compounds

They have low melting and boiling points
They do not dissolve in water
They are not easily combustible
They contain mainly carbon and hydrogen

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Chemistry
Solder metal is an alloy of

Lead and antimony
Copper and zinc
Lead and tin
Copper and tin

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Chemistry
Chemically ‘Quick Silver is known as

Silver
Mercury
Copper
Aluminium

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Chemistry
Sea water is saltier than rain water because

Rivers wash away salts from earth and pour them into the sea
The air around the sea is saltish
Sea animals are salt producing
Sea beds have salt producing mines

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