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The variation of solubility of `Na_2SO_4. 10H_2O` is a discontinous curve. With increase in temperature, it first…………….and then………….. .

True/false Washing soda is Na_2SO_4. 10H_2O

Fill in the blanks: The common name of Na_2CO_3.10H_2O is_____

Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with increase in temperature and vanishes at boiling point. Given that the latent heat of vaporation for water rho_(w) = 540kcal/kg ,mechanical equivalent heat =4.2j/cal Avogadro's No. N_A = 6.0 xx 10^26 , and the molecular weight of water M_A = 18 kg for 1 k mole. Estimate the energy required for oe molecule of water to evaporate.

Complete the following reaction : Na_(2)B_(4)O_(7).10H_(2)O overset(Delta) to ?

Oleum is considered as a solution of SO_(3) in H_(2)SO_(4) , which is obtained by passing SO_(3) in solution of H_(2)SO_(4) When 100 g sample of oleum is diluted with desired mass of H_(2)O then the total mass of H_(2)SO_(4) obtained after dilution is known is known as % labelling in oleum. For example, a oleum bottle labelled as ' 019% H_(2)SO_(4) ' means the 109 g total mass of pure H_(2)SO_(4) will be formed when 100 g of oleum is diluted by 9 g of H_(2)O which combines with all the free SO_(3) present in oleum to form H_(2)SO_(4) as SO_(3)+H_(2)O to H_(2)SO_(4) If excess water is added into a bottle sample labelled as "112% H_(2)SO_(4) " and is reacted with 5.3 g NaCO_(3) then find the volume of CO_(2) evolved at 1 atm pressure and 300 K temperature after the completion of the reaction :

The rate constant for the first order decomposition of H_2O_2 is given by the following equation: log k = 14.34 - 1.25 × 10^4K/T Calculate E_a for this reaction and at what temperature will its half-period be 256 minutes?

When 1.0 g of oxalic acid (H_(2)C_(2)O_(4)) is burnt in a bomb calorimeter whose capacity is 8.75 KJ/K, the temperature increases by 0.312 K, the enthalpy of combustion of oxalic acid at 27^(@)C is :