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Which principle of Scientific Management involves studying the time taken to perform a task?

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Important Questions on Chemical Kinetics

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Deepa and Seema together do a work in

6

days. Deepa can complete the same work alone in

9

days. In how many days will Seema complete the work alone ?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

G is twice as fast as S in doing work. If G can do a work in $30$ days less than S, how many days will they take to complete the work together?

1. $25$
2. $20$
3. $22$
4. $15$

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

10

persons can build a wall in

8

days. How may persons can build the wall in half day ?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A,B, and C together complete a work in 2 days. If A and B need 2.4 days to complete the work, while B and C together complete the work in 4 days then in how many days will B alone do the work?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

28

men can complete a piece of work in

15

days and

15

women can complete the same piece of work in

24

days. What is the respective ratio between the amount of work done by

30

men in

1

day and the amount of work done by

18

women in

1

day?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Ratio of days required by A and B to complete some work is

3 : 5

. They require

5 \frac{5}{8}

days to complete the work. In how many days can A alone complete twice the work?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A and B can complete a piece of work in

6

and

12

days separately. If they work jointly, how long will they take to complete this piece of work ?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

9800 J

of energy was spent to raise a mass of

70 kg

. The mass was raised to a height of _____?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

7

boys and

2

men were working together can do

3

times as much work per hour as a boy and a man together, what will be the ratio of work done by a boy and a man for the given time?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A can do a piece of work in

8

days which B can destroy in

3

days. A has worked for

6

days, during the last

2

days of which B has been destroying. How many days must A now work alone to complete the work?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Working

9

hours a day, Manish can read a book in

16

days. How many hours a day should he work so as to finish the same work in

24

days?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A

is twice as good a workman as

B

and together, they finish a piece of work in

14

days. The number of days taken by

A

alone to finish the work is:

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

X

and

Y

can complete a work in

5

days.

Y

and

Z

can complete the same work in

6

days.

Z

and

X

can complete the same work in

\frac{15}{2}

days. In How many days will

X, Y

and

Z

toogether complete the work?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

20

dogs can eat

20

hens in

10

days. In how many days

40

dogs eat

40

such hens?

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Indira and Chandra can do a task separately in

20

days and

80

days respectively. Indra begins the work and works for

3

days and then takes a leave for five days during those days Chandra works. This process continues till the end of the work. How many days are taken to complete the work?

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

X

can complete

{\frac{5}{7}}^{t h}

part of a work in

10

days and

Y

can complete

{\frac{3}{4}}^{t h}

part of the same work in

9

days. In how many days will both complete

{\frac{13}{21}}^{s t}

part of the total work?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

X

can complete a work in

27

days, and

Y

can do the same work in half of the time taken by

X

. They are working together, what part of the same work they can complete in a day?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Ten people can do a work in $30$ days. In how many days, can 15 people complete double the work -

1. $40$

2. $25$

3. $20$

4. $45$

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A

and

B

can do a job together in

12

days.

A

2

times as efficient as

B

. In how many days can

B

alone complete the work?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

A group of soldiers can completely destroy an enemy camp in

5

days. However,

9

soldiers were injured. The remaining soldiers destroyed the camp in

8

days. Calculate the actual number of soldiers who destroyed the camp?

Which principle of Scientific Management involves studying the time taken to perform a task?

Important Questions on Chemical Kinetics

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