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53 questions · 1995–2026 · answers as per the UPSC key · page 2 of 2
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UPSC 1995 · Q113 · Science & Technology › Energy & Environment · Save
Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers, etc.?
(a) Nickel and cadmium
(b) Zinc and carbon
(c) Lead peroxide and lead
(d) Iron and cadmium
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Answer: (a) Nickel and cadmium
UPSC 1995 · Q116 · Science & Technology › Energy & Environment · Save
The difference between a nuclear reactor and an atomic bomb is that
(a) no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
(b) the chain reaction in nuclear reactor is controlled
(c) the chain reaction in nuclear reactor is not controlled
(d) no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
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Answer: (b) the chain reaction in nuclear reactor is controlled
UPSC 1995 · Q130 · Science & Technology › Energy & Environment · Save
‘Yellow cake’, an item of smuggling across borders is
(a) a crude form of heroin
(b) a crude form of cocaine
(c) uranium oxide
(d) unrefined gold
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Answer: (c) uranium oxide