Description : What is Oxidation numbers for SO4?
Last Answer : This should be SO4-2 ion. sulfur shows +6 in this ion.
Description : What is the complete ionic equation for the reaction between na2 So4 and cacl2?
Last Answer : Feel Free to Answer
Description : The predominant action of plasma is (A) HCO3– (B) Cl– (C) HPO4– – (D) SO4 – –
Last Answer : Answer : B
Description : The pair(s) which will show displacement reaction is/are (i) NaCl solution and copper metal (ii) AgNO3 solution and copper metal (iii) Al2(SO4)3 solution and magnesium metal (iv) ZnSO4 solution and iron metal (a) (ii) only (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (ii)
Last Answer : (c) (iii) and (iv)
Description : A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,
Last Answer : Answer: (c) White, BaSO4
Description : FeSO4 solution mixed with (NH4 ) 2 SO4 solution in 1 : 1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1 : 4 molar ratio does not give the test of Cu2+ ion. Explain why ?
Last Answer : When FeSO4 and (NH4 ) 2 SO4 solution are mixed in 1 : 1 molar ratio, a double salt is formed. It has the formula FeSO4 (NH4 ) 2 SO4 . 6 H2O. In aqueous solution, the salt dissociates. When CuSO4 and NH3 are mixed in the molar ratio of 1 : 4 in solution, a complex [Cu (NH3 ) 4 ] SO4 is formed.
Description : A cationic complex has two isomers A & B. Each has one Co3+, five NH3 , one Br and one SO4 2 . A gives a white precipitate with BaCl2 solution while B gives a yellow precipitate with AgNO3 ... are the possible structures of the complexes A and B ? (a) Will the two complexes have same colour ?
Last Answer : (a) [CO (NH3 ) 5 Br] SO4 and [CO (NH3 ) 5 SO4 ] Br (b) NO
Description : Out of NaCl, MgSO4 , Al2 (SO4 ) 3 , K4 [Fe(CN)6 ], which one will bring about the coagulation of a gold sol quickest and in the least of concentration ?
Last Answer : Ans. Al2 (SO4 ) 3 .
Description : Out of (a) 0.01 M KNO3 , (b) 0.01 M Na2 SO4 which aqueous soln. will exhibit high B. P.?
Last Answer : (a) 0.01 M Na2 SO4
Description : In the manufacture of H3 PO4 (ortho); strong H2 SO4 leaching wet process as compared to electric furnace process (A) Uses lower grade phosphate rock (B) Requires lower capital investment in the plant (C) Produces lower purity acid (D) Is very costly
Last Answer : (C) Produces lower purity acid
Description : In water treatment, alum [Al2 (SO4 )3 ] is used for the process of (A) Filtration (B) Coagulation (C) Sedimentation (D) Disinfection
Last Answer : (B) Coagulation
Description : Alum [Al2 (SO4 )3 ] is used as a coagulant in water treatment to remove (A) Colour (B) Turbidity (C) Bacteria (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Prussian blue is chemically represented by (A) FeO.TiO2 (B) Ca SO4 . 2H2O (C) Fe4 [Fe (CN6 )3 ] (D) AlF3 . 3NaF
Last Answer : (C) Fe4 [Fe (CN6 )3 ]
Description : Which of the following has pH value 7? (1) Pure Water (2) H2 SO4 (3) Sodium Carbonate (4) HCl
Last Answer : Pure Water
Description : Chemical formula of washing soda is (1) Na2 SO4 .10H2O (2) NaHCO3 (3) Na2CO3 .10H2O (4) Ca(OH)2
Last Answer : Na2CO3 .10H2O
Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume (1) conc. HNO3 and conc. HCl (2) conc. HNO3 and conc. H2 SO4 (3) dil. HCl and dil. HNO3 (4) conc. HCl and conc. HNO3
Last Answer : dil. HCl and dil. HNO3
Description : Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2)H2 SO4 (3) HCl (4) HF
Last Answer : H2 SO4
Description : Glass is soluble in (1) H2 SO4 (2) HClO4 (3) HNO 3 (4) HF
Last Answer : HF
Description : When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O
Last Answer : NO2
Description : The difference in the oxidation numbers of two types of sulphul atoms in `Na_(2)S_(4)O_(6)` is…..
Last Answer : The difference in the oxidation numbers of two types of sulphul atoms in `Na_(2)S_(4)O_(6)` is…..
Description : The correct set of oxidation numbers of sulphur atoms in `H_(2)S_(2)O_(3)` is/are:
Last Answer : The correct set of oxidation numbers of sulphur atoms in `H_(2)S_(2)O_(3)` is/are: A. `+6,-2` B. `+4,-2` C. `+2,+4` D. `+5,-1`
Description : What is the oxidation numbers in Cr2O72-?
Last Answer : For chromium 6+; for oxygen 2-.