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49) Portland cement has which of the following ingredients as major component?
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(45) Which of the following statements is true regarding the diagonal relationship between Lithium and magnesium?
(44)Beryllium chloride has which hybridization at 1200K?
(43) From solution of which metal in ammonia, [M(NHβ)β]βΊΒ² can be recovered.
(42)Which elementβs oxide is not used in cement preparation?
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(41)Weakest base among KOH, NaOH, Ca(OH)β and Zn(OH)β is
(40) When KβO is added to water, the solution becomes basic in nature because it contains a significant concentration of
(39) The order of solubility of lithium halides in non-polar solvents follows the order
(38) Cs+ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of -
(36) The alkali metals which form normal oxide, peroxide as well as super oxides are
(35) KOβ is used in space and submarines because it [AIEEE-2002]
(34) Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?
