Reading Mode - Questions

Physics QUESTION #1032

In some units, time $t$ and position $x$ of a particle satisfy $t = x^2 + x$. The acceleration of the particle is:

$+\dfrac{2}{(x+1)^3}$
$+\dfrac{2}{2x+1}$
$-\dfrac{2}{(x+2)^3}$
$-\dfrac{2}{(2x+1)^3}$✔️

Correct Answer Logic:

$\frac{dt}{dx} = 2x+1\Rightarrow v = \frac{dx}{dt} = \frac{1}{2x+1}$. Acceleration: $a = \frac{dv}{dt} = \frac{dv}{dx}\cdot v = \frac{-2}{(2x+1)^2}\cdot\frac{1}{2x+1} = \frac{-2}{(2x+1)^3}$.

Uploaded by: Fani Warraich

Accounting Finance and Punjab Sales Tax on Services QUESTION #2556

Question 2

Under section 16C of the Punjab Sales Tax on Services Act, 2012, a registered person shall NOT be allowed to adjust input tax in a tax period in excess of what percentage of the output tax for that tax period?

Seventy percent
Eighty percent
Ninety percent✔️
One hundred percent

Correct Answer Logic:

Section 16C(1) as amended provides that a registered person shall not be allowed to adjust input tax in a tax period in excess of ninety percent of the output tax for that tax period.

Uploaded by: Fani Warraich

Islamic Studies QUESTION #7927

Question 3

Which Surah was first revealed?

Al-Annam
Al-Fateha
Al-baqarah
None of these✔️

Correct Answer Logic:

Surah Al-Alaq was the first Surah revealed, specifically its first five verses. The revelation began with 'Iqra' (Read) in the Cave of Hira in 610 CE. Since 'Al-Alaq' is not among the given options, the answer is 'None of these.' Al-Alaq means 'The Clot' and emphasizes knowledge and learning.

Uploaded by: Fani Warraich

Logical Reasoning QUESTION #3959

Question 4

Select the pair with a similar relationship: OBSTRUCTION : BUOY

construction : building✔️
boy : girl
danger : red light
iceberg : titanic

Correct Answer Logic:

2

Uploaded by: Fani Warraich

Pakistan Affairs QUESTION #9100

Question 5

Who composed the National Anthem of Pakistan?

Nisar Bazmi
Khalil Ahmed
Suhail Rana
Abdul Karim Chagla✔️

Correct Answer Logic:

Abdul Karim Chagla composed the music.

Uploaded by: Fani Warraich

Agriculture Economics QUESTION #11880

Question 6

The Production Possibilities Frontier (PPF) for a farmer producing two outputs shows:

All price combinations at which the farmer can sell output
The maximum combinations of two outputs attainable given fixed resources✔️
The minimum cost of producing any output combination
The demand curve for each output

Correct Answer Logic:

The PPF traces the maximum attainable combinations of two outputs given a fixed set of resources and technology.

Uploaded by: Fani Warraich

Physics QUESTION #7863

Question 7

Wheel makes 3 revolutions. Radians rotated:

2π
3π
6π✔️
9π

Correct Answer Logic:

1 rev = 2π rad, so 3 rev = 6π rad.

Uploaded by: Fani Warraich

English QUESTION #8369

Question 8

Choose the correct sentence:

She was dressed with black
She was dressed in black✔️
She was dressed for black
None of these

Correct Answer Logic:

'Dressed in black' is correct.

Uploaded by: Fani Warraich

Math Physics Chemistry Biology QUESTION #11421

Question 9

Blood group which is known as a universal donor:

A
AB $^{ve}$
O $^{-ve}$✔️
B

Correct Answer Logic:

Blood group O negative (O$^{-ve}$) is the universal donor for red blood cells because: (1) type O red cells lack A and B surface antigens (no immune reaction from ABO mismatch), and (2) Rh negative cells lack the Rh(D) antigen (no Rh reaction). O$^{-ve}$ blood can be transfused to any recipient in emergencies.

Uploaded by: Fani Warraich

MBBS QUESTION #10358

Question 10

Transamination reactions, which transfer an amino group from an amino acid to an alpha-keto acid (commonly alpha-ketoglutarate, forming glutamate), universally require which vitamin-derived coenzyme?

Pyridoxal phosphate (a vitamin B6 derivative)✔️
Thiamine pyrophosphate (a vitamin B1 derivative)
Biotin
Tetrahydrofolate

Correct Answer Logic:

All aminotransferase (transaminase) enzymes require pyridoxal phosphate, the active form of vitamin B6, as a coenzyme to form a Schiff base intermediate with the amino acid substrate during amino group transfer — the biochemical basis for pyridoxine-responsive metabolic disorders and drug-induced B6 deficiency (e.g., with isoniazid).

Uploaded by: Fani Warraich

Math Physics Chemistry Biology QUESTION #794

Question 11

The comparative rate at which solute moves in paper chromatography depends upon $R_f$ value of:

Solute✔️
Solution
Solvent
None

Correct Answer Logic:

The $R_f$ (retention factor) value is specific to the solute and describes how far it travels relative to the solvent front in chromatography.

Uploaded by: Fani Warraich

General Knowledge QUESTION #8714

Question 12

'MI5' is the security intelligence agency of which country?

USA
UK✔️
Russia
India

Correct Answer Logic:

MI5 is the United Kingdom's domestic counter-intelligence agency.

Uploaded by: Fani Warraich

Boilers Mechanical Engineering QUESTION #4013

Question 13

The 'Deaerator' in a steam plant removes:

Solids
Dissolved gases like Oxygen and $CO_2$✔️
Steam bubbles
Oil

Correct Answer Logic:

Removing oxygen is critical to prevent 'Pitting' corrosion in the boiler and pipes.

Uploaded by: Fani Warraich

Dairy Food Science and Technology QUESTION #5987

Question 14

The function of 'cutting' the rennet curd into cubes in cheese making is to:

Add flavor compounds to the curd surface
Increase the surface area of curd to facilitate rapid and controlled whey expulsion (syneresis), with smaller cuts producing drier cheeses (e.g. Parmesan: pea-sized cubes; Camembert: large irregular cubes)✔️
Allow brine to penetrate the curd for salting
Mix starter culture evenly throughout the curd

Correct Answer Logic:

Curd cutting creates more surface area for whey drainage. Curd cube size directly determines final cheese moisture: smaller cuts $\rightarrow$ more surface area $\rightarrow$ faster whey expulsion $\rightarrow$ lower moisture (hard cheeses like Parmesan: pea-sized cuts); larger cuts $\rightarrow$ slower drainage $\rightarrow$ higher moisture (soft cheeses like Camembert).

Uploaded by: Fani Warraich

Civil Procedure QUESTION #5671

Question 15

Under Rule 11, a motion for sanctions is served on the opposing party. The opposing party has how many days to withdraw or correct the challenged paper before the motion can be filed with the court?

14 days.
21 days.✔️
28 days.
30 days.

Correct Answer Logic:

Rule 11(c)(2) provides a 'safe harbor' period of 21 days after service for the challenged paper to be withdrawn or appropriately corrected.

Uploaded by: Fani Warraich

Psychology QUESTION #9781

Question 16

The phenomenon of 'groupthink' refers to:

Deterioration of mental efficiency✔️
Deterioration of physical energy
Think tank
Both deterioration of physical energy and think tank

Correct Answer Logic:

Groupthink (Irving Janis) refers to the deterioration of mental efficiency, reality testing, and moral judgment in cohesive groups that prioritize unanimity over critical analysis, leading to poor collective decisions.

Uploaded by: Fani Warraich

Psychology QUESTION #9908

Question 17

The detection of physical energy by sensory receptors in the sense organs is:

Cognition
Sensation✔️
Perception
Adaptation

Correct Answer Logic:

Sensation is the process by which sensory receptors detect physical energy (light, sound, pressure, chemicals) and transduce it into neural signals. It is the first step in sensory processing; perception involves interpreting those signals.

Uploaded by: Fani Warraich

Mathematics QUESTION #6980

Question 18

A box holds 15 green and 10 yellow balls. If 10 balls are picked one at a time with replacement, find the variance of the number of green balls picked.