1996

AIEEE Sample Questions › Inorganic Chemistry questions › 1996

WHich of these doesnt dissolve in hot dil HNO3
a)HgS
b)PbS
c)CuS
d)CdS

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6 Answers

Pritish Chakraborty ·2010-03-13 20:24:20

Just a guess...CuS?
Ok, I just read that CuS can be used as a semiconductor(extra electron delocalisation). So it could easily get oxidised by HNO₃...?

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govind ·2010-03-13 22:13:21

The answer is HgS..this question has already been asked here by Ronald..some time back..

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eureka123 ·2010-03-14 10:35:59

can u provide the link?

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govind ·2010-03-14 10:38:23

ya...
here is the link
http://www.targetiit.com/iit-jee-forum/posts/iit-1996-14520.html

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aieeee ·2010-03-14 11:26:31

ya, HgS is right as its insoluble at all concentrations of HNO3. If it would hv been AQUAREGIA , it would hv been soluble.

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eureka123 ·2010-03-14 22:04:51

thx all [1]

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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1996

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