91) The law of octaves was proposed by:
A) Dmitri Mendeleev
B) John Newlands
C) Lothar Meyer
D) J.J. Thomson
92) Which of the following methods is used for the concentration of ore?
A) Electrolysis
B) Froth flotation
C) Distillation
D) Sublimation
93) The purification method used for blister copper is:
A) Electrolytic refining
B) Zone refining
C) Distillation
D) Poling
94) What is the nature of a solution whose pH value is zero?
A) Neutral
B) Acidic
C) Basic
D) Amphoteric
95) Identify the sulphide ore among the following:
A) Hematite
B) Galena
C) Magnetite
D) Bauxite
96) The product or products formed when sodium carbonate reacts with HCl is/are:
A) Sodium chloride and carbon dioxide
B) Sodium bicarbonate and carbon dioxide
C) Sodium chloride, carbon dioxide, and water
D) All of the above
97) IUPAC name of CH\(_3\)CHO is:
A) Ethanol
B) Acetaldehyde
C) Propanol
D) Butanal
98) Which of the following is the hardest material?
A) Diamond
B) Graphene
C) Iron
D) Silicon carbide
99) The below reaction is an example of:
A) Hydrogenation
B) Halogenation
C) Hydrolysis
D) Addition
100) The hybridisation of carbon in graphite is:
A) sp
B) sp\(^2\)
C) sp\(^3\)
D) sp\(^3\)d
Your Score: 0 / 0
Pages:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
