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Raymond Cattell (and later John Horn) proposed the distinction between fluid intelligence (Gf) — the ability to reason and solve novel problems, independent of acquired knowledge — and crystallized intelligence (Gc) — accumulated knowledge and skills from experience and education. This distinction is central to the Cattell-Horn-Carroll (CHC) theory of cognitive abilities.

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Pakistan Affairs QUESTION #9123

Question 2664

Who was the first Pakistani climber to summit Mount Everest on May 17, 2000?

Nazir Sabir✔️
Salma Salim
Namira Salim
Ashraf Aman

Correct Answer Logic:

Nazir Sabir was the first Pakistani on Everest.

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Physics QUESTION #7075

Question 2665

An X-ray tube functions at a potential of $1.24$ million volts. Calculate the shortest wavelength produced by the photons in this tube.

$10^{-3} \text{ nm}$✔️
$10^{-2} \text{ nm}$
$10^{-4} \text{ nm}$
$10^{-1} \text{ nm}$

Correct Answer Logic:

The shortest wavelength ($\lambda_{min}$) is given by $\lambda = \frac{hc}{eV}$. Using $hc \approx 1240 \text{ eV}\cdot\text{nm}$, we have $\lambda = \frac{1240 \text{ eV}\cdot\text{nm}}{1.24 \times 10^6 \text{ eV}} = 1000 \times 10^{-6} \text{ nm} = 10^{-3} \text{ nm}$.

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Nursing QUESTION #9137

Question 2666

A nurse is monitoring a woman receiving IV Magnesium Sulfate for eclampsia prophylaxis. Which finding requires IMMEDIATE cessation of the infusion and administration of the antidote?

Serum Mg²⁺ level of 4–7 mEq/L
Respiratory rate of 10/min with absent patellar reflexes✔️
Urine output of 35 mL/hour
Mild sedation and flushing

Correct Answer Logic:

Magnesium Sulfate Toxicity monitoring is a critical nursing responsibility:

Serum Mg²⁺ Level	Clinical Effect
$1.5{-}2.5\,\text{mEq/L}$	Normal therapeutic range
$4{-}7\,\text{mEq/L}$	Therapeutic anticonvulsant range
$5{-}10\,\text{mEq/L}$	Loss of deep tendon reflexes (first sign of toxicity)
$10{-}13\,\text{mEq/L}$	Respiratory paralysis ← DANGER
$>15\,\text{mEq/L}$	Cardiac arrest

Stop infusion IMMEDIATELY if:

Respiratory rate $<12/\text{min}$
Absent patellar (deep tendon) reflexes — earliest clinical sign
Urine output $<25{-}30\,\text{mL/hr}$ (Mg is renally excreted)
O₂ saturation falling

Antidote: Calcium Gluconate 1 g (10 mL of 10% solution) IV over 10 minutes — must be at bedside at all times.

Urine output of 35 mL/hr is acceptable (minimum 25–30 mL/hr). Flushing and sedation are normal side effects, not toxicity signs.

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Mathematics QUESTION #4126

Question 2667

For $f(z) = \frac{1}{z} = \frac{\cos(\theta)}{r} - i\frac{\sin(\theta)}{r}$ in polar form, compute $u_r$ and verify C-R equations. What is $u_r$?

$-\frac{\cos(\theta)}{r^2}$✔️
$-\frac{1}{r^2}$
$\frac{\cos(\theta)}{r}$
$\frac{1}{r}$

Correct Answer Logic:

$u = \frac{\cos(\theta)}{r}$, so $u_r = -\frac{\cos(\theta)}{r^2}$. Also $v = -\frac{\sin(\theta)}{r}$, so $v_\theta = -\frac{\cos(\theta)}{r}$. Then $\frac{1}{r}v_\theta = -\frac{\cos(\theta)}{r^2} = u_r$. C-R satisfied.

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Math Physics Chemistry Biology QUESTION #4281

Question 2668

The complementary base pairing in DNA is important because it:

Maintains the tertiary structure of enzymes
Provides energy for all cell metabolism
Enables protein to fold properly
Allows DNA to act as a genetic blueprint during replication✔️

Correct Answer Logic:

Complementary base pairing (A–T, G–C) ensures accurate replication — each strand acts as a template, making DNA the reliable genetic blueprint.

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Geography QUESTION #1248

Question 2669

Fossils are never found in:

Shale
Granite✔️
Sandstone
None of these

Correct Answer Logic:

Fossils are only found in sedimentary rocks (such as shale, sandstone, limestone) because they form from the gradual burial and compression of organic remains in sediments. Granite is an igneous rock formed from the cooling of magma at high temperatures and pressures — any organic material would be destroyed under such conditions. Therefore fossils are never found in granite or other igneous/metamorphic rocks.

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English QUESTION #497

Question 2670

Why did you disagree with me?

Why did you disagree with me?✔️
Why did you disagree to me?
Why did you disagree on me?
Why did you disagree by me?

Correct Answer Logic:

'Disagree with' is correct

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Ability / HR / Governance / Special Education QUESTION #1845

Question 2671

Under which section of Civil Servants Act 1973 are the Civil Servants (Appointment, Promotion and Transfer) Rules, 1973 framed?

Section 20
Section 23
Section 25✔️
Section 27

Correct Answer Logic:

Rule 1 states these rules are framed in exercise of powers conferred by Section 25 of the Civil Servants Act, 1973 (LXXI of 1973).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3291

Question 2672

'Fermentation' is a metabolic process that produces energy (ATP) in the:

Presence of high oxygen
Absence of oxygen (Anaerobic)✔️
Presence of sunlight
Presence of antibiotics

Correct Answer Logic:

Fermentation allows cells to regenerate $NAD^+$ for glycolysis without an electron transport chain.

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Chemistry QUESTION #7414

Question 2673

The acidity of diprotic acids in aqueous solution increases in the order:

$\text{H}_2\text{S} < \text{H}_2\text{Se} < \text{H}_2\text{Te}$✔️
$\text{H}_2\text{Se} < \text{H}_2\text{S} < \text{H}_2\text{Te}$
$\text{H}_2\text{Te} < \text{H}_2\text{S} < \text{H}_2\text{Se}$
$\text{H}_2\text{Se} < \text{H}_2\text{Te} < \text{H}_2\text{S}$

Correct Answer Logic:

Acid strength of hydrides (Group 16):
Down the group, bond length increases (H–X bond gets weaker), making it easier to release H⁺. Therefore acid strength increases down the group:

$\text{H}_2\text{O} < \text{H}_2\text{S} < \text{H}_2\text{Se} < \text{H}_2\text{Te}$

Note: This trend is opposite to electronegativity trend, and is governed by bond dissociation energy.

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Security Measures to Maintain Law and Order QUESTION #929

Question 2674

How does a 'Security Audit' differ from a routine inspection?

It is shorter
It is a systematic, independent review✔️
It is conducted by the media
It involves no paperwork

Correct Answer Logic:

Audits are deep, structured evaluations used to ensure that security programs meet national and international standards.

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Ability / HR / Governance / Special Education QUESTION #1890

Question 2675

What happens to the pay and service status of a government servant placed on leave under Rule 5(1)(i) who is ultimately NOT dismissed removed reduced or compulsorily retired?

The leave is treated as extraordinary leave without pay
The leave is treated as duty on full pay✔️
The leave period is counted toward pension only
The leave is regularized as earned leave

Correct Answer Logic:

Rule 8-A explicitly provides that if such a government servant is not punished he shall rejoin duty and the leave period shall be treated as duty on full pay.

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Urdu QUESTION #5069

Question 2676

وہ الفاظ جو تلفظ میں مختلف ہوں لیکن معنی ایک ہوں کیا کہلاتے ہیں؟

مترادف✔️
متضاد
ہم آواز
مہمل

Correct Answer Logic:

مترادف وہ الفاظ ہوتے ہیں جن کے معنی ملتے جلتے یا یکساں ہوں جیسے غم، الم، حزن۔

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3609

Question 2677

'Acacia' (Gum Arabic) is chemically a:

Salt of Arabic acid✔️
Simple sugar
Protein
Volatile oil

Correct Answer Logic:

Acacia is a complex polysaccharide used as a suspending and emulsifying agent.

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English QUESTION #4424

Question 2678

The manager accepted the cashier's __________ for coming late.

expalanation
explaination
expinasion
explanation✔️

Correct Answer Logic:

The correct spelling is 'explanation' — a noun meaning a statement that makes something clear. All other options (expalanation, explaination, expinasion) are common misspellings of this word.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3679

Question 2679

'Palisade cells' are a type of tissue found in:

Roots
Mesophyll of leaves✔️
Bark
Wood

Correct Answer Logic:

They contain chloroplasts and are studied in leaf microscopy.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3375

Question 2680

'Benedict’s Test' is used to detect the presence of:

Non-reducing sugars
Reducing sugars✔️
Proteins
Lipids

Correct Answer Logic:

Reducing sugars (like glucose) reduce cupric ions to cuprous oxide, forming a brick-red precipitate.

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Serum Mg²⁺ Level	Clinical Effect
\(1.5{-}2.5\,\text{mEq/L}\)	Normal therapeutic range
\(4{-}7\,\text{mEq/L}\)	Therapeutic anticonvulsant range
\(5{-}10\,\text{mEq/L}\)	Loss of deep tendon reflexes (first sign of toxicity)
\(10{-}13\,\text{mEq/L}\)	Respiratory paralysis ← DANGER
\(>15\,\text{mEq/L}\)	Cardiac arrest