The p -Block Elements
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2 months agoContributor-Level 10
Helium is used as a diluent for oxygen in modern diving apparatus because of its very low solubility in blood.
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2 months agoContributor-Level 10
Coke- reducing agent
Diamond- sp³ carbons
Fullerenes- cage like structure
Graphite- used as lubricant
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2 months agoContributor-Level 10
Tl? ³ is less stable than Tl? ¹ (inert pair effect). Going down the group 13, stability of lower oxidation state increases. In case of B, Al, Ga and In, higher O.S. +3 remains more stable than lower O.S. +1 . But, in last stable element, thallium (Tl), lower O.S. +1 become more stable than higher O.S. +3 .
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2 months agoContributor-Level 10
| H – F | H – Cl | H – Br | H – I |
| :- | :- | :- | :- |
| 1s – 2p | 1s – 3p | 1s – 4p | 1s – 5p |
Down the group size increases
Overlapping decreases
Acidic strength increases
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2 months agoContributor-Level 10
Correct sequence of bond enthalpy of C – X bond is
CH? – F > CH? – Cl > CH? – Br > CH? – I
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2 months agoContributor-Level 10
The maximum temperature that can be achieved in blast furnace is upto 
.
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2 months agoContributor-Level 10
Due to lanthanoid contraction Zr and Hf has similar atomic and ionic radii.
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2 months agoContributor-Level 10
At different positions -NO? affects acidic strength differently. The order of acidic strength is p-nitrophenol > o-nitrophenol > m-nitrophenol.
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2 months agoTaking an Exam? Selecting a College?
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