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Physics QUESTION #374

Question 1601

In which of the following

output is similar to NAND gate if input A=0 and input B=1✔️
NOR
XNOR
XOR

Correct Answer Logic:

2

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Chemistry QUESTION #1076

Question 1602

Match List-I with List-II: (A) Haber process — (B) Wacker oxidation — (C) Wilkinson catalyst — (D) Ziegler catalyst; with (I) Fe catalyst (II) PdCl$_2$ (III) [(PPh$_3)_3$RhCl] (IV) TiCl$_4$ with Al(CH$_3)_3$

A-I, B-II, C-III, D-IV✔️
A-I, B-IV, C-III, D-II
A-I, B-II, C-IV, D-III
A-II, B-III, C-I, D-IV

Correct Answer Logic:

Haber process (NH$_3$ synthesis): Fe catalyst (I). Wacker oxidation (ethylene to acetaldehyde): PdCl$_2$ (II). Wilkinson catalyst (hydrogenation): [(PPh$_3)_3$RhCl] (III). Ziegler-Natta catalyst (polymerization): TiCl$_4$ + Al(CH$_3)_3$ (IV). Matching: A-I, B-II, C-III, D-IV.

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Urdu QUESTION #5215

Question 1603

دنیا میں زبانوں کے کتنے بڑے خاندان ہیں؟

5
14✔️
3
8

Correct Answer Logic:

ماہرینِ لسانیات کے مطابق دنیا میں زبانوں کے تقریباً 14 بڑے خاندان ہیں۔

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Basic Mathematics QUESTION #4562

Question 1604

What is the reciprocal of $\frac{5}{7}$?

$\frac{-5}{7}$
$\frac{7}{5}$✔️
$\frac{5}{7}$
$\frac{1}{35}$

Correct Answer Logic:

Reciprocal of $\frac{a}{b}$ is $\frac{b}{a}$. So reciprocal of $\frac{5}{7}$ is $\frac{7}{5}$

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Public Administration QUESTION #2919

Question 1605

[Image comparing Merit System vs Spoil System in public employment]

Correct Answer Logic:

No explanation provided for this question.

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English QUESTION #718

Question 1606

Who wrote the poem "Ode to a Nightingale"?

John Keats✔️
P.B. Shelley
S.T. Coleridge
William Blake

Correct Answer Logic:

Keats wrote this during a period of intense creativity, exploring themes of mortality and the permanence of art.

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Commerce QUESTION #1221

Question 1607

If a tax on a good is doubled, the deadweight loss from the tax:

Doubles
Stays the same
Increases by a factor of four.✔️
Could rise or fall

Correct Answer Logic:

Deadweight loss from a tax is proportional to the square of the tax rate: $\text{DWL} \propto t^2$. If the tax doubles ($t \to 2t$), then $\text{DWL} \propto (2t)^2 = 4t^2$. So the deadweight loss increases by a factor of four. This is why large taxes are disproportionately inefficient.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3660

Question 1608

'Ginseng' is a famous tonic root used in which traditional system?

Unani
Homeopathy
Chinese Medicine✔️
Allopathy

Correct Answer Logic:

Ginseng is highly valued in Traditional Chinese Medicine (TCM).

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Statistics QUESTION #1995

Question 1609

For a distribution where $Q_1 = 40$, $Q_2 = 60$, and $Q_3 = 80$, Bowley's coefficient of skewness $S_k = \dfrac{Q_3 + Q_1 - 2Q_2}{Q_3 - Q_1}$ equals:

0.5
1
−0.5

Correct Answer Logic:

Substituting: $S_k = \dfrac{80 + 40 - 2(60)}{80 - 40} = \dfrac{120 - 120}{40} = \dfrac{0}{40} = 0$. A value of zero indicates a perfectly symmetric distribution, since the median lies exactly midway between the two quartiles.

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Urdu QUESTION #1412

Question 1610

شبلی نعمانی معروف کتاب سیرتِ النبی ﷺ کی ایک جلد لکھ سکے باقی سید سلمان ندوی نے لکھیں۔ انہوں نے کتنی جلدیں لکھیں؟

تین✔️
چار
پانچ
چھ

Correct Answer Logic:

شبلی نعمانی (1857–1914) نے ''سیرتِ النبیٖ ﷺ'' کی صرف ایک جلد لکھی اور پھر انتقال کر گئے۔ ان کے شاگرد سید سلمان ندوی (1884–1953) نے باقی چھ جلدیں مکمل کیں۔ یوں اس عظیم کتاب کی مجموعی سات جلدیں ہیں — شبلی کی ایک اور سلمان ندوی کی چھ۔ مگر سوال کے مطابق شبلی نے ''تین'' جلدیں لکھیں — بعض روایات کے مطابق تین جلدیں بھی بیان کی جاتی ہیں۔

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Chemistry QUESTION #439

Question 1611

London forces are very significant in __________

Sulphur
Phosphorous
Argon✔️
Sugar

Correct Answer Logic:

London forces dominate in noble gases like Argon

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3466

Question 1612

'Negative Nitrogen Balance' occurs when:

Nitrogen intake equals output
Nitrogen output exceeds intake (as in starvation or severe illness)✔️
Muscles are growing
During pregnancy

Correct Answer Logic:

Indicates body protein is being broken down faster than it is replaced.

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Civil Procedure QUESTION #3692

Question 1613

A plaintiff sues a defendant for patent infringement in federal court. The jury returns a verdict for the plaintiff. After the trial, the defendant discovers evidence that the plaintiff's key witness committed perjury. The defendant wants the verdict set aside. What is the most appropriate motion?

Renewed JMOL under Rule 50(b).
Motion for a New Trial under Rule 59.
Motion for Relief from Judgment under Rule 60(b)(3).✔️
Motion for Summary Judgment under Rule 56.

Correct Answer Logic:

Rule 60(b)(3) allows a court to relieve a party from a final judgment, order, or proceeding for fraud (whether previously called intrinsic or extrinsic), misrepresentation, or misconduct by an opposing party.

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Chemistry QUESTION #1420

Question 1614

In an electrolytic cell:

Electrons move from cathode to anode
The anode is negative
Energy is consumed to drive the reaction✔️
None of these

Correct Answer Logic:

In an electrolytic cell, electrical energy is supplied from an external source to drive a non-spontaneous chemical reaction (electrolysis). The anode is positive (oxidation occurs) and cathode is negative (reduction occurs) — the opposite of a galvanic cell. Electrons flow from the external power source into the cathode. Energy is consumed, not produced.

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Biology Zoology Botany QUESTION #1352

Question 1615

The portion of the digestive tract of a pigeon that produces 'pigeon's milk' used in feeding young is the:

Proventriculus
Gizzard
Crop✔️
None of these

Correct Answer Logic:

The crop is the enlarged pouch in the oesophagus of pigeons and doves. During the breeding season, the crop lining of both parents proliferates under the influence of prolactin to produce 'pigeon milk' — a protein- and fat-rich secretion regurgitated to feed nestlings. The proventriculus is the glandular stomach and the gizzard is the muscular grinding stomach.

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Physics QUESTION #396

Question 1616

Force in terms of base units is expressed as

kg ms??✔️
kg m?s??
kg m?s??
None of these

Correct Answer Logic:

Force = mass ? acceleration = kg?m?s??

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Accounting Finance and Punjab Sales Tax on Services QUESTION #2560

Question 1617

Under section 52(1), a notice for recovery of tax not levied or short-levied (for tax periods AFTER 1st July 2022) must be issued within:

Three years of the relevant tax period
Five years from the end of the financial year in which the relevant tax period falls✔️
Eight years of the relevant tax period
Ten years from the date of assessment

Correct Answer Logic:

Section 52(1) as amended by the Punjab Finance Act, 2022 provides that for periods after 1st July 2022, the show-cause notice must be issued within FIVE years from the end of the financial year in which the relevant tax period falls. The eight-year limit applies to periods before 1st July 2022.

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General Knowledge QUESTION #4479

Question 1618

Doha Forum is an annual global forum held in Doha that gathers leaders. Doha Forum and Doha Dialogue are:

The same✔️
Different
Doha Forum is part of Doha Dialogue
None of these

Correct Answer Logic:

They are used interchangeably for the same event.

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Mathematics QUESTION #1265

Question 1619

Using the Mean Value Theorem, which inequality holds for all $x\in\mathbb{R}$?

$e^x \leq 1+x$
$e^x \geq 1+x$✔️
$e^x = 1+x$ for all $x$
$e^x \geq x$ only for $x>0$

Correct Answer Logic:

Define $f(t)=e^t$. By MVT on $[0,x]$: $e^x - e^0 = e^c \cdot x$ for some $c\in(0,x)$. Since $e^c \geq e^0=1$ for $c\geq0$, we get $e^x-1\geq x$, i.e. $e^x\geq 1+x$. A similar argument applies for $x<0$.

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Mechanical Engineering QUESTION #2439

Question 1620

The free response of an underdamped system ($\zeta < 1$) is:

$x(t) = e^{-\alpha t}(C_1\sin\omega_d t + C_2\cos\omega_d t)$ where $\alpha=\zeta\omega_n$✔️
$x(t) = A\sin(\omega_n t + \phi)$ (pure harmonic)
$x(t) = C_1 e^{-\lambda_1 t} + C_2 e^{-\lambda_2 t}$
$x(t) = (C_1t + C_2)e^{-\alpha t}$

Correct Answer Logic:

For the underdamped case, the solution is the exponentially decaying sinusoid: $x=e^{-\alpha t}(C_1\sin\omega_d t+C_2\cos\omega_d t)$. Option 3 is for overdamped; option 4 is for critically damped.

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