chemistry

JEE Mains 2015 Papers › Class VII-X Chemistry questions › chemistry

An atom of one element A has four elements in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be

A₂B
AB₂
A₂B₃
A₃B₂

Your Answer
d

Correct Answer
b

How it is possible?

#Chemistry #Class VII-X Chemistry

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Aveek Bhaumik ·2014-05-01 01:07:57

since a has 4 electrons in outermost shell its valency =+4. since b has 6 electrons in its outermost shell its valency = (6-8)=-2. thus compound is between A+4 AND B-2
By crisscross method the answer is AB2.So b is the correct answer

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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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chemistry

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