Chemistry ss2 2024

The allotropic form of sulphur which is stable at temperatures below 96⁰c is

• Plastic sulphur

• Rhombic sulphur

• Monoclinic sulphur

• Amorphous sulphur

The allotropic form of sulphur that is bright yellow and octahedral in shape is

• Plastic sulphur

• Rhombic sulphur

• Monoclinic sulphur

• Crystalline sulphur

The allotropic form of sulphur whose crystals are long, thin and needle-shaped is

• Rhombic sulphur

• Monoclinic sulphur

• Plastic sulphur

• Amorphous sulphur

___ is used in the vulcanization of rubber

• Nitrogen

• Tetraoxosulphate

• Sulphur

• Sulphur(iv)oxide

_ is prepared in the lab by the action of dilute acid on a metallic sulphide

• Hydrogen sulphide

• Sulphide

• Sulphate

• Sulphuric acid

_{Kipps apparatus is used to produce gases like __ and __}

• Nitrogen and Ammonia

• Carbon and hydrogen

• Hydrogen sulphide and carbon(iv)oxide

• Sulphides

Tetraoxosulphate(vi)acid is manufactured by ___

• Frasch process

• Contact process

• Bosch process

• Solvay process

The oxidation state of sulphur in tetraoxosulphate(VI) is

• 5

• 6

• 3

• 2

Which of the following does not define oxidation

• Removal of electrons

• Addition of oxygen

• Addition of hydrogen

• Removal of electronegative elements

What is the oxidation state of chromium in sodium heptaoxochromate(VI)

• 12

• 3

• 2

• 6