Preparation of cabalt Metaborate involves the following steps of reactions: (i) Ca_(2)B_(6)O_(11) + Na_(2)CO_(3)(aq) overset("Boiled") to CaCO_(3) "(insoluble)" + Na_(2)B_(4)O_(7) + NaBO_(2) (ii) Na_(2)B_(4)O_(7) overset(Delta)to NaBO_(2) + B_(2)O_(3) (iii) CoO + B_(2) O_(3) overset(Delta) to Co(BO_(2))_(2). (Atomic weight: B=11, Co=59) If the yield of reaction (i),(ii) & (iii) 60% (200)/(3)% & 32.2% respectively , then mass of Ca_(2)B_(6)O_(11) in kg required to produce 14.5 kg of Co(BO_(2))_(2) is

Preparation of cabalt Metaborate involves the following steps of react

1.	Preparation of cabalt Metaborate involves the following steps of reactions: (i) Ca_(2)B_(6)O_(11) + Na_(2)CO_(3)(aq) overset("Boiled") to CaCO_(3) "(insoluble)" + Na_(2)B_(4)O_(7) + NaBO_(2) (ii) Na_(2)B_(4)O_(7) overset(Delta)to NaBO_(2) + B_(2)O_(3) (iii) CoO + B_(2) O_(3) overset(Delta) to Co(BO_(2))_(2). (Atomic weight: B=11, Co=59) If the yield of reaction (i),(ii) & (iii) 60% (200)/(3)% & 32.2% respectively , then mass of Ca_(2)B_(6)O_(11) in kg required to produce 14.5 kg of Co(BO_(2))_(2) is
Answer» 250 200 190 150 Answer :A