The IUPAC nomenclature of the compound above is?
4 - ethyloctane
5 - ethyloctane
5 - propylheptane
3 - propylheptane
Correct answer is A
Adhering to the basic naming rules, this compound is identified as 4 - ethyloctane
The residual solids from the fractional distillation of petroleum are used as?
coatings of pipes
raw materials for the cracking process
fuel for the driving tractors
fuel for jet engines
Correct answer is A
Other residues (apart from bitumen) are used as fuel, pipe coating, etc
Stainless steel is used for making?
magnets
tools
coins and medals
moving parts of clocks
Correct answer is B
- Stainless steel is an alloy of iron, nickel and chromium. It is used in making cutlery, tools and surgical equipment.
A compound gives an orange-red color to non-luminous flame. This compound is likely to contain?
Na+
Ca2+
Fe3+
Fe2+
Correct answer is B
- Calcium when introduced into the flame, it will produce brick red / red-orange colour.
When iron is exposed to moist air, it gradually rusts. This is due to the formation of?
hydrate iron (III) oxide
anhydrous iron (III) oxide
anhydrous iron (II) oxide
hydrate iron (II) oxide
Correct answer is A
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.
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