The initial setting of cement is primarily due to which of the following?
- AFormation of gel and hydration
- BDehydration and formation of gel
- CHydration and hydrolysis
- DHydration and oxidation
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Identify the incorrect order against the property given in brackets.
Copper becomes green when exposed to moist air for a long period. This is due to
DifficultJEE MAIN 2014
View SolutionWhich orders are correct?
$(I)$ Thermal stability: $BeSO_4 < MgSO_4 < CaSO_4 < SrSO_4$
$(II)$ Basic nature: $CaO > MgO > BeO > ZnO$
$(III)$ Solubility in water: $LiOH < NaOH < KOH < RbOH$
$(IV)$ Melting point: $NaCl > KCl > RbCl > CsCl > LiCl$
$(I)$ Thermal stability: $BeSO_4 < MgSO_4 < CaSO_4 < SrSO_4$
$(II)$ Basic nature: $CaO > MgO > BeO > ZnO$
$(III)$ Solubility in water: $LiOH < NaOH < KOH < RbOH$
$(IV)$ Melting point: $NaCl > KCl > RbCl > CsCl > LiCl$
Medium
View SolutionAssertion : $s-$Block elements do not occur free in nature.
Reason : $s-$Block elements are highly electropositive in nature.
Reason : $s-$Block elements are highly electropositive in nature.
DifficultAIIMS 2009
View SolutionWhich of the following thermal stability orders is correct?
Difficult
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