Related Questions

'Spinel', a refractory mineral is chemically represented as
A MgAl2O4
B MgAl2O3
C MgSO4
D MgAl2O3.2H2O
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
A Element
B Compound
C Atom
D Molecule
Identify the sentence in which the word element (s) refers to 'suitable or favourable environment. (1) There is an element of truth in your story. (2) Water is composed of elements of hydrogen and oxygen. (3) I feel out of my elements in political discussions. (4) Water is a natural element for fish
A (4)
B (3)
C (1) and (2)
D (1)
If 'air' is called 'green', is called 'red', 'red' is called 'sea', is called 'blue', 'blue' is called 'water' and 'water' is called 'pink', then what is the color of grass?
A Green
B Air
C Red
D Pink
If Dust is called Air, Air is called Fire, Fire is called Water, Water is called Colour, Colour is called Rain and Rain is called Dust, where do Fish live ?
A Dust
B Fire
C Colour
D Water
Fill in the gaps : There is no such thing as chemically pure water ----nature.
A in
B of
C from
D none of these
There is no such things as chemically pure water--- nature.
A in
B of
C from
D none of these
Calgon used in water treatment is chemically
A Sodium phosphate
B Sodium hexametaphosphate
C Calcium phosphate
D Tricresyl phosphate
A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to 8 times itself?
A 12 years
B 8 years
C 16 years
D 64 years
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
A Polymethyl methacrylate (PMMA)
B Polytetraflouroethylene(PTFE)
C Polycarbonates
D Phenolic resins

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