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Materials and Construction

Materials and Construction
A chemical change takes place when iron

Is heated
Rusts
None of these
Melts

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Materials and Construction
Cast iron vessels are not suitable for the storage of

H₂SO₄ (95%) at room temperature
H₂SO₄ (fuming)
Freon
Wet SO₂

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Materials and Construction
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.

Antimony
Bismuth
Both B and C
Arsenic

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Materials and Construction
Locomotive boiler tubes are made of __________ alloys.

Arsenic copper
Magnesium
Nickel
Aluminium

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Materials and Construction
Perspex is nothing but

Acrylic sheet
Aluminium foil clad with bakelite
An elastomer
An alloy of lead and tin

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Materials and Construction
Electronic structure of a material is generally studied by

Metallurgical microscope
Electron diffraction
Spectroscopic techniques
X-ray

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