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Daily NEET MCQ- July 21, 2022 - NEET MCQ


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10 Questions MCQ Test - Daily NEET MCQ- July 21, 2022

Daily NEET MCQ- July 21, 2022 for NEET 2024 is part of NEET preparation. The Daily NEET MCQ- July 21, 2022 questions and answers have been prepared according to the NEET exam syllabus.The Daily NEET MCQ- July 21, 2022 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Daily NEET MCQ- July 21, 2022 below.
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Daily NEET MCQ- July 21, 2022 - Question 1

On complete combustion, 0.500 g of an organic compound gave 0.150 of carbon dioxide. Determine the percentage composition of carbon in the compound.

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 1

The required equation is:
Percentage of carbon = 12 * m2 * 100/ 44 * m
In this case, m = 0.500
m2 = 0.150
Substituting in the equation → Percentage of carbon = 12 * 0.150 * 100/ 44 * 0.500
= 8.18%
Therefore, the percentage of carbon present in the organic compound is 8.18%.

Daily NEET MCQ- July 21, 2022 - Question 2

0.350 g of an organic compound gave 100 ml of nitrogen collected at 250 K temperature and 700 mm pressure. Calculate the percentage composition of nitrogen in the compound. Use Dumas method.

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 2

Here, p = 700 mm; v = 100 ml; t =250 K
Volume of nitrogen at STP = p * v * 273/ 760 * t
= 700 * 100 * 273/ 760 * 250
= 100.57 ml
22,400 ml of nitrogen at STP weighs = 28 g
Then, 100.57 ml of nitrogen weighs = 28 * 100.57/22400
= 0.125 g
Therefore, percentage of nitrogen = 0.125 * 100/0.350
= 35.71%
So, percentage of nitrogen in the organic compound is 35.71%.

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Daily NEET MCQ- July 21, 2022 - Question 3

Using Carius method, find out the percentage of bromine in the compound if 0.450 g of organic compound gave 0.200 g of AgBr. (Given: molar mass of Ag = 108; molar mass of Br = 80)

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 3

The molar mass of AgBr = 108 + 80
= 188 g
So, 188 g of AgBr contains 80 g of Br.
Then, 0.200 g of AgBr contains 80 * 0.200/ 188 = 0.085 g bromine
Therefore, percentage of bromine = 0.085 * 100/ 0.450
= 18.91%
Thus, the percentage of bromine (halogen) using Carius method is 18.91%.

Daily NEET MCQ- July 21, 2022 - Question 4

The temperature of 50g of water has to be risen from 15°C to 85°C by using steam at 120°C. What is the amount of steam, in gms, required for the same? Sw= 1cal/ g°C, Lvap = 540cal/g, Ssteam =0.48cal/g°C.

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 4

Heat lost by steam = Heat gained by water. Let ‘m’ be the mass of steam required.
∴ mSsteam (120-100) + mLvap + mSw (100-85) = 50Sw (85-15) The only variable is ‘m’.
On calculating it from the above equation, we get:
m = 6.19g.

Daily NEET MCQ- July 21, 2022 - Question 5

30g water at 30°C is mixed with 1g of steam at 100℃. Calculate the final temperature of the mixture. Sw = 1cal/ g°C, Lvap= 540cal/g.

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 5

30*1*(T-30) = 1*540 + 1*1*(100-T)
∴ 30T – 900 = 540 + 100 – T
⇒ 31T = 1540
⇒ T = 49.67°C

Daily NEET MCQ- July 21, 2022 - Question 6

What should be the temperature of 1g of ice, so that when it’s added to 9g of water, lowers the temperature of water by 10°C? Sw = 1cal/ g°C, Sice = 0.5cal/ g°C, Lfus= 80cal/g.

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 6

Let the initial temperature of ice be T°C.
Heat lost by ice will be the same as the heat lost by water.
∴ 1*0.5*(0-T) + 1*80 = 9*1*10
⇒ T = -20°C.

Daily NEET MCQ- July 21, 2022 - Question 7

Is it possible to make calculations of the net gain of ATP?

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 7

Yes, it is possible to make calculations of the net gain of the ATP that is formed in the respiratory pathway by the oxidation of some suitable respiratory substrates but this can remain only a theoretical exercise as the real amount of energy released in the cell may vary.

Daily NEET MCQ- July 21, 2022 - Question 8

Which of the following is an assumption of the respiratory balance sheet?

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 8

One of the assumptions made in the respiratory balance sheet is that there is a sequential, orderly pathway functioning, with one substrate forming the next and with glycolysis, TCA cycle and ETS pathway following one after another.

Daily NEET MCQ- July 21, 2022 - Question 9

Which of the following is not an assumption of the respiratory balance sheet?

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 9

Certain assumptions of the respiratory balance sheet include that none of the intermediates in the pathway are utilised to synthesise any other compound. Respiration is a sequential pathway and NADH synthesised in glycolysis is transferred into the mitochondria and undergoes oxidative phosphorylation.

Daily NEET MCQ- July 21, 2022 - Question 10

How many ATP molecules are gained during aerobic respiration?

Detailed Solution for Daily NEET MCQ- July 21, 2022 - Question 10

Aerobic respiration involves the complete oxidation of glucose. There can be a net gain of 38 ATP molecules during aerobic respiration of one molecule of glucose.

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