Class 12th
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2 months agoNew answer posted
2 months agoContributor-Level 10
Most of the trivalent lanthanoid ions are coloured in the solid state.
New answer posted
2 months agoContributor-Level 10
Teflon are prepared by addition polymerization from tetrafluroethene.
CF? = CF? - (catalyst, High pressure)-> [–CF? – CF? –]? Teflon
Nylon-66, Novolac, Dacron are prepared by condensation polymerisation.
New answer posted
2 months agoContributor-Level 10
(4) C? H? O will have different alkyl group attached with polyvalent functional group that's why show metamerism
Only one arrangement possible so can not show metamerism.
(2) C? H? O → CH? – O – CH? – CH? Only one arrangement possible so can not show metamerism.
(1) No polyvalent functional group in C? H? , so can not show metamerism.
New answer posted
2 months agoContributor-Level 10
Tyndall effect is exhibited by colloidal solutions.
Starch solution is a colloidal solution
New answer posted
2 months agoContributor-Level 10
Dimethylammonium acetate is a weak acid & weak base type of salt.
pH = 7 + ½ pK? – ½ pK?
= 7 + ½ * 4.77 – ½ * 3.27
= 7.75
New answer posted
2 months agoContributor-Level 10
Element % At. Weight (% / At.weight) the simplest ratio
C 78 12 6.5 1
H 22 1 22 ≈ 3
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