Reading Mode - Questions

By Bernoulli's principle, faster-moving air exerts lower pressure. Air moves faster over the curved upper surface of the wing, creating lower pressure above and higher pressure below, generating lift ($\Delta P = \frac{1}{2}\rho v^2$).

Uploaded by: Fani Warraich

Biology QUESTION #4316

Question 6

Which of the following is a key feature of RNA?

Deoxyribose and thymine
Double stranded and thymine
Ribose and uracil✔️
Ribose and thymine

Correct Answer Logic:

RNA contains the sugar ribose (not deoxyribose) and the nitrogenous base uracil (instead of thymine). RNA is typically single-stranded.

Uploaded by: Fani Warraich

Pakistan Affairs QUESTION #157

Question 7

What did Jinnah's Fourteen Points state regarding the future constitution of India?

The constitution should be unitary
The constitution should be federal, with residuary powers in provinces✔️
It should grant complete independence to provinces
It should establish a centralized government

Correct Answer Logic:

Jinnah insisted on a federal system to protect Muslim-majority provincial interests.

Uploaded by: Fani Warraich

Chemistry QUESTION #1007

Question 8

RBr undergoes Grignard reaction (Mg, dry ether) followed by hydrolysis ($\text{H}_2\text{O}$) to give 2-methylbutane. The maximum number of structural isomers of RBr that can produce 2-methylbutane is:

5
4✔️
3
1

Correct Answer Logic:

2-Methylbutane is $\text{CH}_3\text{CH(CH}_3\text{)CH}_2\text{CH}_3$. The Grignard reagent RMgBr reacts with water to give R–H. So R– must be a fragment of 2-methylbutane: 1-methylbutyl, 2-methylbutyl, 1-methyl-1-propyl, neopentyl, and isobutyl radicals. Counting distinct structural isomers of RBr gives 4.

Uploaded by: Fani Warraich

Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3647

Question 9

The 'Bark' of a plant consists of all tissues located:

Inside the xylem
Outside the vascular cambium✔️
In the roots only
In the flowers

Correct Answer Logic:

Bark includes the phloem, cortex, and periderm.

Uploaded by: Fani Warraich

Reading and Writing (Module-1) QUESTION #5323

Question 10

Despite the harsh conditions of the Arctic, several species of plants have adapted to thrive there by growing close to the ground, which ______ them from the chilling winds. Which choice completes the text with the most logical and precise word?

shields✔️
exposes
weakens
forces

Correct Answer Logic:

Growing low to the ground protects or 'shields' the plants from wind.

Uploaded by: Fani Warraich

Chemistry QUESTION #4372

Question 11

What is the general requirement for free radical substitution reaction of ethane and halogen?

Low pressure
Low temperature
High pressure
Heat and UV light✔️

Correct Answer Logic:

Free radical substitution (e.g., $C_2H_6 + Cl_2 \xrightarrow{h\nu} C_2H_5Cl + HCl$) requires initiation by UV light or heat to generate free radicals by homolytic cleavage of the halogen molecule.

Uploaded by: Fani Warraich

Chemistry QUESTION #4356

Question 12

Oxidation numbers of X, Y, Z are $+6$, $-2$, $\&$ $-1$ respectively. Possible molecular formula when atoms combine:

$X_2YZ$
$XY_2Z_2$✔️
$XYZ_2$
$XY_2Z$

Correct Answer Logic:

For electrical neutrality, the sum of oxidation numbers must equal zero. For $XY_2Z_2$: $(+6) + 2(-2) + 2(-1) = +6 - 4 - 2 = 0$ ✓. This is the correct formula.

Uploaded by: Fani Warraich

Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3266

Question 13

'Ketosis' occurs when the body primarily burns:

Sugar
Fats (producing ketone bodies)✔️
Proteins
Water

Correct Answer Logic:

Common in starvation or uncontrolled diabetes.

Uploaded by: Fani Warraich

Math (Module-1) QUESTION #5457

Question 14

A group of students voted on five after-school activities. The bar graph (not shown) displays the number of students who chose each activity. Based on the graph, how many students chose activity 3?

25
39
48✔️
50

Correct Answer Logic:

The bar for activity 3 reaches 48 on the vertical axis.

Uploaded by: Fani Warraich

Physics QUESTION #1171

Question 15

The product of mass and velocity is known as:

Work
Moment
Impulse
Momentum✔️

Correct Answer Logic:

Momentum is defined as the product of mass and velocity: $\vec{p} = m\vec{v}$. It is a vector quantity measured in $\text{kg·m/s}$. Work is force times displacement, impulse is force times time (equal to change in momentum), and moment refers to torque.

Uploaded by: Fani Warraich