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11 months ago

Class 12th Chemistry Electrochemistry

A solution of Fe₂(SO₄)₃ is electrolyzed for 'x' min with a current of 1.5 A to deposit 0.3482g of Fe. The value of x is ______. [nearest integer]

Given : 1F = 96500 C mol1

Atomic mass of Fe = 56 g mol1

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Raj Pandey

Contributor-Level 9

$F e^{+ 3} + 3 e^{-} \to F e$

3 Faraday is required to deposit 1 mole Fe

$? 56 g$ deposited by $3 * 96500$ C charge

$∴ 0.3482 g$ deposited by $\frac{3 * 96500}{56} * 0.3482 C = \frac{100803.9}{56} C = 1800.7 C$

$∴ Q = I t$

1800.07 = 1.5 t

$∴ t = 1200 s e c = \frac{1200}{60}$ min = 20 min

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11 months ago

Class 12th English

The XYZ manufacturing company produces a product which has 6 month demand cycle as given below:

Month	Demand in Units	Working days/month
January	600	22
February	1000	19
March	800	21
April	200	21
May	400	22
June	600	2

Company's policy is to retain safety stock of 20% of monthly demand and each month's safety stock becomes the opening stock for the next month, and opening stock for January is 100 units. Each unit requires 10 labour-hours and company works 8 hour/day.

In which month production requirement is highest?

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Payal Gupta

Contributor-Level 10

Please find the answer below

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New answer posted

11 months ago

Class 12th English

Direction for question: Go through the table given below and solve the questions based on it.

The XYZ manufacturing company produces a product which has 6 month demand cycle as given below:

Month	Demand in Units	Working days/month
January	600	22
February	1000	19
March	800	21
April	200	21
May	400	22
June	600	2

What is the opening stock for June?

0 Follower 6 Views

Payal Gupta

Contributor-Level 10

Month	Opening	Demand	Resource 20%	Production	Working days
January	100	600	120	620	22
February	120	1000	200	1080	19
March	200	800	160	760	21
April	160	200	40	80	21
May	40	400	80	440	22
June	80	600	120	640	20

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11 months ago

Class 12th Chemistry Chemical Kinetics

At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa was 340s. When the pressure was 27.8 kPa., the half life was found to be 170s. The order of the reaction is ________. [integer answer]

0 Follower 7 Views

Raj Pandey

Contributor-Level 9

t1/2 = 340 secP0 = 55.5 kPa

t1/2 = 170 sec P0 = 27.8 kPa

$∴ t_{1 / 2} \propto {(P_{0})}^{1 - n}$

$∴ 1 - n = 1 n = 0$

$∴$ zero order reaction

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11 months ago

Class 12th English

Go through the bar charts below and solve the questions that follow.

There are only three cities – A, B and C, in a state.
Following bar chart gives us the population figures of these cities (Figure in' 000):

For which year is the ratio of population of city A to the population of city B the highest?

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Payal Gupta

Contributor-Level 10

The rate of increase in expenses from year 3 to year 5 is 10%. So expenditure in year 6 = 22 * 1.1 = 24.2 crore

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11 months ago

Class 12th English

Go through the bar charts below and solve the questions that follow.

There are only three cities – A, B and C, in a state.
Following bar chart gives us the population figures of these cities (Figure in' 000):

If increase in the population of city can only be due to new births and decrease in population of city can only due to death, then number of new births in city A in year 2020 is (in' 000):

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Payal Gupta

Contributor-Level 10

The difference between the expenditure in year 2 and year 1 is 2% Use the options now.

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New answer posted

11 months ago

Class 12th English

Go through the bar charts below and solve the questions that follow.

There are only three cities – A, B and C, in a state.
Following bar chart gives us the population figures of these cities (Figure in' 000):

In which year was the population of city A the highest in state's total population?

0 Follower 4 Views

Payal Gupta

Contributor-Level 10

Required amount = 0.12 * 2.4 crore

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New answer posted

11 months ago

Class 12th Biomolecules

A protein 'A' contains 0.30? of glycine (molecular weight 75). The minimum molar mass of the protein 'A' is ___________* 10³g mol^-1 [nearest integer]

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Raj Pandey

Contributor-Level 9

$?$ 0.30 gm glycine is present in 100 gm protein

$∴$ 75 gm glycine is present in $\frac{100}{0.30} * 75 = \frac{10000}{30} * 75 = 25 * 1 0^{3} g / m o l$

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11 months ago

Class 12th English

The following table gives the career record in the One-Day Internationals of few of the Indian batsmen:

Name	Matches Played	Innings Played	Runs Scored	Average
Rohit	50	48	1800	40
Gill	50	50	2034	45.2
Virat	46	46	1679	36.5
Shreyas	44	44	1539	40.5
Hardik	40	38	1806	51.6
Rahul	42	40	1445	42.5

The average is calculated by dividing the total runs scored by the total number of matches in which the batman got out.

To reflect the performance of the players better, it was decided that the average would be calculated on the basis of the total matches played. Whose average will see the minimum change due to this?

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Payal Gupta

Contributor-Level 10

Again, the difference is minimum in case of Virat

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New answer posted

11 months ago

Class 12th English

The following table gives the career record in the One-Day Internationals of few of the Indian batsmen:

Name	Matches Played	Innings Played	Runs Scored	Average
Rohit	50	48	1800	40
Gill	50	50	2034	45.2
Virat	46	46	1679	36.5
Shreyas	44	44	1539	40.5
Hardik	40	38	1806	51.6
Rahul	42	40	1445	42.5

The average is calculated by dividing the total runs scored by the total number of matches in which the batman got out.

How man of the batsmen got out in all the innings played?

0 Follower 29 Views

Payal Gupta

Contributor-Level 10

Only Virat got out in all the innings played. Take the help of the solution to Q1

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