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Complete the equation. 2Res+OH– + 2– → __________ + 2OH– 2- b) (Res+)23- c) (Res+)22- d) (Res+)32-

Correct Answer: 2– → __________ + 2OH– ] (Res+)22-
Anion exchanges are used for the removal of anionic nickel cyanide complex from waste solutions.

Complete the equation. Acid + Base = __________ + water.

If Arif works alone he will take 20 more hours to complete a task than if he works with Babu to complete the task. If Babu work alone, he will take 5 more hours to complete the task than if he works with Arif to complete the task. What is the ratio of the time taken by Arif to than taken by Babu if each of them works alone to complete the task?

Directions: Four friends Raghu, Rajesh, Ramesh and Ravi complete their Graduation in different number of years. The one who took maximum time took eight years to complete his Graduation while the one who took least time took only three years to complete it.Ravi took more time only than Raghu and completed his Graduation in five years. Ramesh did not take longer time
than Rajesh to complete his Graduation. Question: Who took more years to complete his graduation among all ?

i)8MnO4+3S2O32-+2H+⇾8MnO2+6SO42-+H2 ii)2MnO4-+5C2O42-+4H+⇾2Mn2++10CO2+2H2O+3O2 iii)2MnO4-+5NO2-+6H+⇾2Mn2++5NO3-+3H2O iv)2MnO4-+I-+3H2O⇾IO5-+2MnO2+2OH-+2H2 v) 2MnO4-+10I-+16H+⇾2Mn2++5I2+8H2O উল্লিখিত বিক্রিয়াগুলোর মধ্যে সঠিক বিক্রিয়ার জন্য নিচের কোন উত্তর হবে?

2F2 + 2OH– → 2F– + OF2 + H2O is a type of ______________

6 men can complete a piece of work in 12 days. 8 women can complete the same piece of work in 18 days whereas 18 children can complete the piece of work in 10 days. 4 men, 12 women and 20 children work together for 2 days. If only men were to complete the remaining work in 1 day how many men would be required totally?

A shopkeeper has a job to print certain number of documents and there are three machines P, Q and R for this job. P can complete the job in 3 days, Q can complete the job in 4 days and R can complete the job in 6 days. How many days the shopkeeper will it take to complete the job if all the machines are used simultaneously ?

A can complete a task alone in 8 days, while B takes 12 days to do it by herself. Together with C it takes them 4 days to complete the work. If C and D together can complete the task in 15 days, then how many days will D need to complete the task by herself?

P can complete $$\frac{1}{4}$$ of a work in 10 days, Q can complete 40% of the same work in 145 days. R, complete $$\frac{1}{3}$$ of the work in 13 days and S, $$\frac{1}{6}$$ of the work in 7 days. Who will be able complete the work first ?

X takes 4 days to complete one-third of a job. Y takes 3 days to complete one-sixth of the job and Z takes 5 days to complete half the job. If all of them work together for 3 days and X and Z quit, how long will it take for Y to complete the remaining work done.