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The byproduct of Solvay process is:

(a) CO2

(b) NH3

(c) CaCl2

(d) CaCO3

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Washing soda is:

(a)Na2CO3

(b) Na2CO3.H2O

(c) Na2CO3.7H2O

(d) Na2CO3.10H2O

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The suspension of slaked lime in water is known as

(a) limewater

(b) quicklime

(C) milk of lime

(d) aqueous solution of slaked lime

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In context with beryllium, which one of the following statements is incorrect?

(a) It is rendered passive by nitric acid

(b) lt forms Be2C

(c) Its salts rarely hydrolyse

(d) Its hydride is electron-deficient and polymeric

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Some Important Compounds of Ca
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On heating which of the following releases CO2 most easily?

(a) K2CO3                                 (b) Na2CO3

(c) MgCO3                                 (d) CaCO3

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Some Important Compounds of Ca
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Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

(a) CaSO4               (b) BeSO4

(c) BaSO4               (d) SrSO4

 

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A compound (A) is used in preparation of washing soda to recover ammonia in Solvay's process. When CO2 is bubbled through an aqueous solution of (A), the solution turns milky.It is used in white washing due to disinfectant nature. What is the chemical formula of A?

(a) CaHCO32                       (b) CaO

(c) CaOH2                           (d) CaCO3

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Some Important Compounds of Ca
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CaCl2 is preffered over NaCl for clearing ice on roads particularly in very cold countries. This is because:

(a) CaCl2 is less soluble in H2O than NaCl

(b) CaCl2 is hygroscopic but NaCl is not 

(c) Eutectic mixture of CaCl2/H2O freezes at -55°C while that of NaCl/H2O freezes at -18°C

(d) NaCl makes the road slippery but CaCl2 does not

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Which of the following statement is false?

(a) The milk of magnesia used as antacidis chemically MgO + MgCl2

(b) Stability of alkali metal peroxides increases with increase in atomic number

(c) Hydration energy of AgF is higher than its lattice energy

(d) Anhydrous MgCl2 cannot be prepared contains by direct heating of MgCl2 6H2O

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A metal [x] on heating on nitrogen gas gives [Y]. [Y] on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a blue colour. [Y] is

(A) MgNO32                                     

(B) Mg3N2

(C) NaN3                                             

(D) MgO

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Some Important Compounds of Ca
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