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$-273\ °C = 0\ K$ (absolute zero). By the ideal gas law $PV = nRT$, at $T = 0\ K$, $P = \frac{nRT}{V} = 0$. At absolute zero, all molecular motion ceases and pressure becomes zero.

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Biology Zoology Botany QUESTION #1373

Question 807

Which type of pollination involves the transfer of pollen by wind?

Hydrophily
Anemophily✔️
Entomophily
Zoophily

Correct Answer Logic:

Anemophily is pollination by wind. Wind-pollinated plants (e.g., grasses, conifers, oak) typically produce large quantities of light, smooth, dry pollen; have reduced or absent petals; lack nectar and scent; and have feathery stigmas to catch airborne pollen. Hydrophily = water, Entomophily = insects, Zoophily = animals (including birds and bats).

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Physics QUESTION #7292

Question 808

The coordinates of a particle at any time $t$ are $x = 5t - 2t^2$ and $y = 10t$ (metres, seconds). The acceleration of the particle at $t = 2\text{ s}$ is:

$5\text{ m/s}^2$
$-4\text{ m/s}^2$✔️
$-8\text{ m/s}^2$
$0$

Correct Answer Logic:

$a_x = \dfrac{d^2x}{dt^2} = -4\text{ m/s}^2$ (constant)

$a_y = \dfrac{d^2y}{dt^2} = 0$

Acceleration vector $= -4\hat{i}\text{ m/s}^2$ at all times, including $t = 2\text{ s}$. Magnitude $= \mathbf{4\text{ m/s}^2}$, directed in $-x$ direction.

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Economics QUESTION #1709

Question 809

The Chinn-Ito index (KAOPEN), frequently cited in cross-country empirical research on financial integration and capital mobility, is specifically designed to quantify a country's:

Total factor productivity in the manufacturing sector
Degree of capital account openness based on IMF's AREAER restrictions✔️
Nominal and real exchange rate volatility over a rolling period
None of these

Correct Answer Logic:

The Chinn-Ito index (developed by Menzie Chinn and Hiro Ito) is a de jure measure of capital account openness — it quantifies the extent to which a country restricts or liberalises cross-border capital transactions, based on binary variables derived from the IMF's Annual Report on Exchange Arrangements and Exchange Restrictions (AREAER). A higher KAOPEN score indicates a more open capital account. Pakistan's score has historically been low, reflecting significant capital account restrictions.

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Agronomy QUESTION #2112

Question 810

The concept of 'radiation use efficiency' (RUE) in crop production is defined as:

The ratio of photosynthetically active radiation (PAR) incident on the crop canopy to the total solar radiation received
The amount of above-ground dry matter produced per unit of intercepted photosynthetically active radiation (IPAR), expressed as g dry matter MJ⁻¹ IPAR — a key parameter linking canopy light interception to biomass production in crop simulation models✔️
The percentage of total solar radiation converted to grain yield (economic RUE)
The ratio of actual evapotranspiration to potential evapotranspiration under the current crop canopy

Correct Answer Logic:

RUE = Above-ground biomass (g) / Intercepted PAR (MJ). It is a conservative parameter for a species under non-stressed conditions: C3 cereals ~1.0–1.5 g/MJ; C4 crops (maize, sorghum) ~1.5–2.0 g/MJ. RUE is the slope of the linear biomass-IPAR relationship in Monteith's framework. Stresses (N deficiency, drought, heat) reduce RUE. Grain yield = RUE × IPAR × HI — making RUE central to yield analysis.

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Pharmacokinetics and Pharmacodynamics QUESTION #3843

Question 811

The molecular weight of lithium carbonate ($\text{Li}_2\text{CO}_3$) is $73.89$ with Li atomic weight $= 6.95$. How many millimol of lithium ions are present in a $300$ mg tablet?

$2.46$ mmol
$4.06$ mmol
$8.12$ mmol✔️
$12.18$ mmol

Correct Answer Logic:

Moles of $\text{Li}_2\text{CO}_3 = \dfrac{300}{73.89} = 4.06\ \text{mmol}$. Each formula unit contains $2\ \text{Li}^+$ ions, therefore Li $= 4.06 \times 2 = 8.12\ \text{mmol}$.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3614

Question 812

'Adulteration' is defined as:

Improving the quality of a drug
Debasement of an article by substitution with inferior substances✔️
Cleaning a drug
Packaging a drug

Correct Answer Logic:

Adulteration involves the intentional or accidental addition of impure or fake materials.

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Pakistan Affairs QUESTION #294

Question 813

Which statement best describes the overall trend in Pak-India diplomatic relations?

Continuous peace
Uninterrupted cooperation
Amicable resolution
Periods of tension, conflict, and normalization efforts✔️

Correct Answer Logic:

Relations have been characterized by a cycle of conflict, cold peace, and dialogue.+1

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Professional QUESTION #1825

Question 814

Section 6(3) of the Civil Servants Act 1973 deals with failure to pass a prescribed examination or training during probation. If a civil servant appointed by PROMOTION fails to pass the required examination before the expiry of probation, what is the prescribed consequence?

He shall be discharged from service
He shall be reverted to the post from which he was promoted and against which he holds a lien, or discharged if no such post exists✔️
He shall be given an automatic extension of probation period
He shall be referred to the Federal Public Service Commission for re-evaluation

Correct Answer Logic:

Section 6(3)(b) provides that if a civil servant appointed by promotion or transfer fails to pass the prescribed examination or training during probation, he shall be reverted to the service or post from which he was promoted or transferred and against which he holds a lien, or if no such post exists, be discharged. Discharge is only for initial appointees under clause (a).

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English QUESTION #2723

Question 815

Which word is an ADVERB in the sentence: 'She sings beautifully.'?

She
sings
beautifully✔️
a

Correct Answer Logic:

An adverb modifies a verb

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Accounting & Finance QUESTION #6117

Question 816

Which stakeholders focus mainly on the liquidity of a business?

Government
Lenders
Public and environmental bodies
Suppliers

1 and 2
1 and 4
2 and 3
2 and 4✔️

Correct Answer Logic:

Option D (2 and 4) is correct.

Lenders: Need to know if the business can meet short-term obligations and repay loans.
Suppliers: Need to know if the business can pay its bills on time.

Government focuses on profitability/tax. Public/environmental bodies focus on social impact.

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