Chemistry-
General
Easy
Question
The mineral colemanite is fused with sodium carbonate, compound(Z) is obtained along with white ppt. When(Z)reactswithdil.H2SO4 gives a compound(a) which on strong heating gives an oxide(C).(c) on reduction with Mg produced(d) and nonmetal(X).Treatment of chlorine on a mixture of(c) and carbon at high temperature gives a halide(E) which is fuming liquid(b.pt.13°C) along with a gas(F).(E)is a Lew is acid. (Z) may be:
- H3BO3
- BaCO3
- Borax
- Na3BO3
The correct answer is: BaCO3
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Areactionisspontaneousiffreeenergychange,,forthereactionisnegative.Thequestionarises,how wecanexplainthespontaneityofreversiblereactions.Letustaketheexampleofdissociationequilibriumof ThevariationoffreeenergywiththefractionofN2O4dissociatedunderstandardconditions is shown in the figure below:
Thestandardfreeenergychangefortheconversionof1moleofN2O4into2molesofNO2is:
Areactionisspontaneousiffreeenergychange,,forthereactionisnegative.Thequestionarises,how wecanexplainthespontaneityofreversiblereactions.Letustaketheexampleofdissociationequilibriumof ThevariationoffreeenergywiththefractionofN2O4dissociatedunderstandardconditions is shown in the figure below:
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Electronegativity is a feature which is relative and depends on several factor like oxidation number, hybridizations etc.
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Electronegativity is a feature which is relative and depends on several factor like oxidation number, hybridizations etc.
For instance, the electronegativity of differently hybridized carbon are :
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chemistry-General