W.B. Joint Entrance- 2011 Chemistry Paper (English Version)

WEST BENGAL JOINT ENTRANCE EXAMINATION,2011

Biology

( English Version )

Multiple Choice Question

(Each question carries one mark)

41. The normality of ‘30 volume H₂O₂’ is
A. 2.678 N     B. 5.336 N    C. 8.034 N     D. 6.685 N

42. Reaction of formaldehyde and ammonia gives
A. Hexamethylene tetramine     B. Bakelite
C. Urea                       D. Triethylene Tetramine

43. A plot of ln k against 1/T (abscissa) is expected to be a straight line with intercept on ordinate axis equal to
A. [tex]{{\Delta S^\circ } \over {2.303R}}[/tex]    B. [tex]{{\Delta S^\circ } \over R}[/tex]    C. [tex] - {{\Delta S^\circ } \over R}[/tex]   D. [tex]R \times \Delta S^\circ[/tex]

44. Which of the following represents the composition of Carnallite mineral ?
A. K₂O.Al₂O₃.6SiO₂          B. KNO₃
C. K2SO₄.MgSO₄.MgCl₂.6H₂O    D. KCl.MgCl₂.6H₂O

45. The solubility of Ca₃(PO₄)₂ in water is y moles/litre. Its solubility product is
A. 6y⁴   B. 36y⁴    C. 64y⁵    D. 108y⁵

46. Paracetamol is
A. Methyl salicylate             B. Phenyl salicylate
C. N-acetyl p-amino phenol  D. Acetyl salicylic acid

47. Anhydrous ferric chloride is prepared by
A. Dissolving Fe(OH)₃ in concentrated HCl      B. Dissolving Fe(OH)₃ in dilute HCl
C. Passing dry HCl over heated iron scrap        D. Passing dry Cl₂ gas over heated iron scrap