Q1.Two machines M1 and M2 are able to execute any of four jobs P, Q, R and S. The machines
can perform one job on one object at a time. Jobs P, Q, R and S take 30 minutes, 20 minutes, 60
minutes and 15 minutes each respectively. There are 10 objects each requiring exactly 1 job.
Job P is to be performed on 2 objects. Job Q on 3 objects. Job R on 1 object and Job S on 4
objects. What is the minimum time needed to complete all the jobs?
Q3.The reaction rate involving reactants A and B is given by Which one of the
following statements is valid for the reaction to be first –order reaction?
Answer : Option BExplaination / Solution:
In chemical kinetics, the order of reaction with respect to given substance is defined as the
index or exponent to which its concentration term in the rate equation is raised.
Q9.The following sequence of numbers is arranged in increasing order: 1, x, x, x, y, y,9,16,18.
Given that the mean and median are equal, and are also equal to twice the mode, the value of
y is
Answer : Option DExplaination / Solution:
Given, Mean = Median = 2Mode