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Chemistry QUESTION #5535

For a reaction $aA+bB\to cC+dD$, the plot of $\log k$ vs $\frac{1}{T}$ is a straight line with slope $= -10000\ K$. Given that the rate constant is $10^{-5}\ s^{-1}$ at 500 K, find the temperature (in K) at which the rate constant equals $10^{-4}\ s^{-1}$. (Round to nearest integer)

526 K
556 K✔️
600 K
1000 K

Correct Answer Logic:

Using the Arrhenius equation in log form: $\log\frac{k_2}{k_1} = \frac{-\text{slope}}{2.303}\left(\frac{1}{T_2}-\frac{1}{T_1}\right)\cdot2.303$. Since slope of $\log k$ vs $\frac{1}{T}$ is $-\frac{E_a}{2.303R} = -10000$, then $E_a = 10000\times2.303\times8.314$. Using $\log\frac{10^{-4}}{10^{-5}} = -10000\left(\frac{1}{T_2}-\frac{1}{500}\right)$: $1 = -10000\left(\frac{1}{T_2}-0.002\right) \Rightarrow \frac{1}{T_2} = 0.002-0.0001 = 0.0018 \Rightarrow T_2 \approx 556\ K$.

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Agronomy QUESTION #2073

Question 2

The Blaney-Criddle method of estimating crop water requirements is primarily based on:

Net solar radiation and wind speed data
Mean monthly temperature and daylight hours (sunshine percentage), making it suitable for regions where only temperature data are available but less accurate than the Penman-Monteith method✔️
Actual measured pan evaporation data corrected by a pan coefficient
Soil type and available water capacity in the root zone

Correct Answer Logic:

The Blaney-Criddle formula $ET = p(0.46T + 8)$ uses only mean monthly temperature (T) and monthly percentage of annual daylight hours (p). It was widely used before reliable radiation and humidity data were available. While simple, it overestimates ET in humid conditions and underestimates in arid climates — less accurate than the Penman-Monteith equation.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3650

Question 3

The 'Adrenal' hormone used to treat severe allergic reactions is:

Insulin
Thyroxine
Epinephrine (Adrenaline)✔️
Estrogen

Correct Answer Logic:

Epinephrine is the drug of choice for anaphylaxis.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3573

Question 4

'Pharmacognosy' contributes to the development of new drugs by:

Providing leads from nature
Identifying toxic plants
Ensuring the purity of natural products
All of these✔️

Correct Answer Logic:

Natural products remain a massive source for drug discovery.

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English QUESTION #2738

Question 5

'He said

"I will come tomorrow."' — Choose the correct INDIRECT SPEECH.✔️
He said that he will come the next day.
He said that he would come the next day.
He said that he came the next day.

Correct Answer Logic:

1

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Physics QUESTION #7029

Question 6

A pipe with a length of $85\text{ cm}$ is closed at one end. Determine the total number of natural oscillations possible for the air column in this pipe that have frequencies below $1250\text{ Hz}$. (Take the speed of sound as $340\text{ m/s}$).

$6$
$4$✔️
$12$
$8$

Correct Answer Logic:

For a closed pipe, the resonance frequencies are $f_n = \frac{(2n-1)v}{4L}$. Here $L = 0.85\text{ m}$ and $v = 340\text{ m/s}$. The fundamental frequency $f_1 = \frac{340}{4 \times 0.85} = 100\text{ Hz}$. The subsequent odd harmonics are $300\text{ Hz}$, $500\text{ Hz}$, $700\text{ Hz}$, $900\text{ Hz}$, and $1100\text{ Hz}$. The next is $1300\text{ Hz}$, which exceeds the limit. Thus, there are $6$ possible oscillations (including fundamental).

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Political Science QUESTION #6667

Question 7

Which philosopher wrote the 'Two Treatises of Government'?

Hobbes
Locke✔️
Montesquieu
None of these

Correct Answer Logic:

John Locke's work argued against absolute monarchy and for consent of the governed.

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Civil Procedure QUESTION #5677

Question 8

A plaintiff amends their complaint to add a new defendant after the statute of limitations has run. Under Rule 15(c)(1)(C), the amendment relates back if the new defendant received notice of the action within the period provided by Rule 4(m) and:

Knew or should have known the action would have been brought against it, but for a mistake concerning the proper party's identity.✔️
Is a subsidiary of the original defendant.
Suffered no prejudice from the delay.
Consents to the relation back.

Correct Answer Logic:

Rule 15(c)(1)(C) allows relation back when the party to be brought in knew or should have known that the action would have been brought against it, but for a mistake concerning identity.

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Biology Zoology Botany QUESTION #1388

Question 9

The process of transcription involves the synthesis of:

RNA from DNA✔️
Protein from RNA
DNA from RNA
RNA from protein

Correct Answer Logic:

Transcription is the process by which a segment of DNA is used as a template to synthesise a complementary RNA molecule (specifically mRNA) by the enzyme RNA polymerase. The central dogma of molecular biology is: DNA → (transcription) → RNA → (translation) → Protein. DNA from RNA would be reverse transcription.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3315

Question 10

'Bacteremia' is the medical term for:

Bacteria in the urine
Bacteria in the blood✔️
Bacteria in the lungs
Lack of bacteria

Correct Answer Logic:

If the bacteria begin to multiply in the blood, it is called Septicemia.

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Mathematics QUESTION #7444

Question 11

The mean of the data set comprising of 16 observations is 16. If one of the observations valued 16 is deleted and three new observations valued 3, 4 and 5 are added to the data, then the mean of the resultant data is:

16.8
16
15.8
14✔️

Correct Answer Logic:

Original sum = $16 \times 16 = 256$. After deleting 16: new sum = $256 - 16 = 240$. After adding 3, 4, 5: new sum = $240 + 3 + 4 + 5 = 252$. Number of observations = $16 - 1 + 3 = 18$. New mean = $\frac{252}{18} = 14$.

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Adult Health [Medicine and Surgery] QUESTION #3918

Question 12

A 58-year-old male is recovering from an acute myocardial infarction. He develops a heart rate of $40/ ext{min}$ with a blood pressure of $90/60 ext{ mmHg}$ and elevated jugular venous pressure. What is the most appropriate immediate intervention?

Atropine administration✔️
Epinephrine bolus
Temporary transvenous pacing
DC cardioversion

Correct Answer Logic:

No explanation provided for this question.

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Physics and Math QUESTION #788

Question 13

A dice is rolled, what is the probability of getting a number greater than 4?

$\dfrac{1}{4}$
$\dfrac{1}{3}$✔️
$\dfrac{1}{2}$
$\dfrac{1}{6}$

Correct Answer Logic:

Numbers greater than 4: {5, 6} → 2 outcomes out of 6. Probability $= \dfrac{2}{6} = \dfrac{1}{3}$.

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Biology QUESTION #7244

Question 14

In the following matching table, identify the correct combination of crop, its disease, and the corresponding pathogen:

	Crop	Disease	Pathogen
(1)	Citrus	Canker	Pseudomonas rubrilineans
(2)	Potato	Late blight	Fusarium udum
(3)	Brinjal	Root-knot	Meloidogyne incognita
(4)	Pigeon pea	Seed gall	Phytophthora infestans

Citrus — Canker — Pseudomonas rubrilineans
Potato — Late blight — Fusarium udum
Brinjal — Root-knot — Meloidogyne incognita✔️
Pigeon pea — Seed gall — Phytophthora infestans

Correct Answer Logic:

The correct match is Brinjal — Root-knot — Meloidogyne incognita. Meloidogyne is a nematode that causes root-knot disease in many vegetables including brinjal. Late blight of potato is caused by Phytophthora infestans, not Fusarium. Citrus canker is bacterial (Xanthomonas).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3553

Question 15

'Chalk' is an example of a crude drug from the:

Plant kingdom
Animal kingdom
Mineral kingdom✔️
Synthetic origin

Correct Answer Logic:

Mineral drugs include chalk, kaolin, and bentonite.

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MCQs Section QUESTION #4838

Question 16

Pick the word nearly similar in meaning to "TORPOR"

Fever
Lethargy✔️
Taciturn
Torrid

Correct Answer Logic:

Torpor means a state of physical or mental inactivity; sluggishness or dormancy. Lethargy, meaning lack of energy and enthusiasm, is its closest synonym.

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