Reading Mode - Questions

A bipolar world order is characterized by two dominant powers that are roughly equal in strength and compete for global influence. The Cold War era (1945–1991) is the classic example of bipolarity.

Uploaded by: Fani Warraich

Library Sciences QUESTION #1564

Question 5086

In library automation, the MARC 21 format is used primarily for:

Designing library building layouts
Encoding bibliographic, authority, holdings, and community information in a machine-readable structure✔️
Providing digital access to rare manuscripts
Managing library staff payroll

Correct Answer Logic:

MARC 21 (Machine-Readable Cataloguing) is a standard format for encoding bibliographic and related data so that records can be created, stored, exchanged, and processed by computer systems. It is the backbone of shared cataloguing and ILS operations worldwide.

Uploaded by: Fani Warraich

Chemistry QUESTION #4361

Question 5087

Which one of the following has higher vapour pressure?

Acetone
Acetaldehyde
Isopentane✔️
Benzene

Correct Answer Logic:

Vapour pressure depends on intermolecular forces — weaker forces mean higher vapour pressure. Isopentane ($C_5H_{12}$) has only weak London dispersion forces (low boiling point: $28°C$), giving it the highest vapour pressure among the options.

Uploaded by: Fani Warraich

Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5787

Question 5088

When Federal and State laws regarding pharmacy practice conflict, the pharmacist must:

Follow Federal only
Follow State only
Follow the most restrictive✔️
Follow the least restrictive

Correct Answer Logic:

In legal conflicts, the more restrictive law must be followed[cite: 7].

Uploaded by: Fani Warraich

Mathematics QUESTION #4127

Question 5089

Using Cauchy Residue Theorem, evaluate $\oint_{|z|=2} \frac{5z - 2}{z(z-1)} \, dz$. The poles inside are at:

$z = 0$ only
$z = 1$ only
$z = 0$ and $z = 1$✔️
No poles inside $|z| = 2$

Correct Answer Logic:

Poles at $z = 0$ and $z = 1$. Both satisfy $|z| < 2$, so both are inside the contour.

Uploaded by: Fani Warraich

Electrical Engineering QUESTION #2164

Question 5090

A BJT common-emitter amplifier has $\beta = 100$, $R_C = 4\,\text{k}\Omega$, and $I_{C,Q} = 1\,\text{mA}$. The small-signal voltage gain $A_v$ (neglecting $r_o$) is:

$-154$✔️
$+154$
$-400$
$-100$

Correct Answer Logic:

$g_m = I_C/V_T = 1\,\text{mA}/26\,\text{mV} \approx 38.5\,\text{mS}$. $A_v = -g_m R_C = -38.5\,\text{mS} \times 4\,\text{k}\Omega \approx -154$.

Uploaded by: Fani Warraich

Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3637

Question 5091

A 'Carminative' is a drug that:

Relieves flatulence (gas) from the GI tract✔️
Cures cancer
Reduces fever
Causes vomiting

Correct Answer Logic:

Fennel, Cardamom, and Ginger are classic carminatives.

Uploaded by: Fani Warraich

Basic Mathematics QUESTION #4545

Question 5092

Convert $0.75$ to a fraction in lowest terms:

$\frac{75}{100}$
$\frac{3}{4}$✔️
$\frac{15}{20}$
$\frac{7.5}{10}$

Correct Answer Logic:

$0.75 = \frac{75}{100} = \frac{3}{4}$ (dividing numerator and denominator by $25$)

Uploaded by: Fani Warraich

Agronomy QUESTION #2094

Question 5093

The concept of 'phenotypic plasticity' in crop adaptation to variable environments refers to:

The ability of a plant's DNA sequence to mutate in response to environmental stress
The capacity of a single genotype to express a range of phenotypes (morphological, physiological, or behavioral) in response to different environmental conditions — without genetic change — allowing crops to partially buffer yield across variable environments✔️
The selection of different varieties (genotypes) for each target environment
The use of plastic mulch films to modify the crop microenvironment

Correct Answer Logic:

Phenotypic plasticity describes genotype × environment (G×E) interaction at the individual plant level: one genotype producing different trait expressions (leaf area, tiller number, root architecture, phenology) across environments. Crops with high plasticity can partially self-regulate resource capture. Breeders must distinguish genetic adaptation (G) from plasticity (GEI) when evaluating varieties across diverse environments.

Uploaded by: Fani Warraich

Mathematics QUESTION #6037

Question 5094

Find a value of $\theta$ for which $\dfrac{2+3i\sin\theta}{1-2i\sin\theta}$ is purely imaginary.

$\dfrac{\pi}{6}$
$\sin^{-1}\!\left(\dfrac{\sqrt{3}}{4}\right)$
$\sin^{-1}\!\left(\dfrac{1}{\sqrt{3}}\right)$✔️
$\dfrac{\pi}{3}$

Correct Answer Logic:

Multiply numerator and denominator by the conjugate of the denominator $(1+2i\sin\theta)$:

Numerator real part: $(2+3i\sin\theta)(1+2i\sin\theta)$ real part $= 2-6\sin^2\theta$

For purely imaginary, the real part must be zero: $2-6\sin^2\theta=0\Rightarrow\sin^2\theta=\frac{1}{3}\Rightarrow\sin\theta=\frac{1}{\sqrt{3}}$

Therefore $\theta=\sin^{-1}\!\left(\dfrac{1}{\sqrt{3}}\right)$

Uploaded by: Fani Warraich

Others section QUESTION #4809

Question 5095

Which gas is considered the most significant contributor to the greenhouse effect and climate change?

Ozone
Chlorofluorocarbons
Carbon Dioxide✔️
Methane

Correct Answer Logic:

Carbon Dioxide (CO2) is considered the most significant greenhouse gas contributing to climate change due to its high concentration in the atmosphere and long atmospheric lifetime, largely from burning fossil fuels.

Uploaded by: Fani Warraich