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Which non-metal remains liquid at room temperature ?

Bromine
Iodine
Nitrogen
Hydrogen


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This metal forms an amalgam with other metals?

Mercury
Copper
Iron
Lead


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Among the various allotropes of carbon, which of the following statement(s) are true ?

Diamond is the hardest
Graphite is the softest
Both A & B
None of the above


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Fe, Co and Ni groupped together is called as

Main metals
Platinum group metals
Alkali group metals
Transition metals


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The chemical added to odourless LPG gas for imparting a detectable smell to it is

Sulphur
Methane
Carbon di oxide
Argon


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Monazite is an _____ of thorium

Isomers
Ore
Polymer
Isotopes


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Carbon, diamond and graphite grouped together are called

Ore
Isomorph
Allotropes
Isotopes


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Potassium nitrate can be used in

Ammunition
Fertiliser
Transport
Glass


Potassium nitrate is a chemical compound with the formula KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3−. It occurs as a mineral niter and is a natural solid source of nitrogen. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter or saltpetre.

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______ is main constituent of Soda water.

Citric acid
lactic acid
Carbon di oxide
Oxygen


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Which of the following is most soluble in water

Lime
Sugar
Mercury
Sulphur


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