Chemistry NCERT Exemplar Solutions Class 12th Chapter Eleven
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3 months agoContributor-Level 10
Histamine is the chemical which stimulates the secretion of pepsin in stomach.
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3 months agoContributor-Level 10
Due to H- bond in water, it has high melting point and melting point of other hydrides of the group are depending upon the molecular weight.
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3 months agoContributor-Level 10
Phenol is weakly acidic compound but it is more acidic than alcohol and water because its conjugate base is more stable. Hence statement -I is correct while statement -II is wrong.
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3 months agoContributor-Level 10
Cs is used in devising photoelectric cells. Boron fibres are used in making bullet – proof vest silicones being surrounded by non-polar alkyl group are water repelling in nature.
Gallium is less toxic and has a very high temperature thermometers
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3 months agoContributor-Level 10
It does not contains 2nd most abundant element by weight in earth crust because that is Si Calgon
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