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As compared to covalent compounds, electrovalent compounds generally have:
(1) Low melting points and low boiling points
(2) Low melting points and high boiling points
(3) High melting points and low boiling points
(4) High melting points and high boiling points
Ans: High melting points and high boiling points
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1s 2 , 2s 2 , 2p 6 3s 1 shows configuration of: (1) Al 3+ in ground state (2) Ne in excited state (3) Mg + in excited state (4) None of these Ans: Mg + in
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A solution contains an unknown amount of osmium at the µg/g level, or below. Chemically pure osmium (Os) may be separated from the solution, but the chemical yields are variable an
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If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Solution) There is a formula for this i.e [ (n 2 - n 1
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Pb(NO)3 + Na3Po4 --> NaNo3 + PbPO4
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