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Chemistry QUESTION #1020

Arrange $\text{HBr}$, $\text{H}_2\text{S}$, $\text{NF}_3$ and $\text{CHCl}_3$ in increasing order of their dipole moment:

$\text{H}_2\text{S} < \text{HBr} < \text{NF}_3 < \text{CHCl}_3$
$\text{NF}_3 < \text{HBr} < \text{H}_2\text{S} < \text{CHCl}_3$✔️
$\text{HBr} < \text{H}_2\text{S} < \text{NF}_3 < \text{CHCl}_3$
$\text{CHCl}_3 < \text{NF}_3 < \text{HBr} < \text{H}_2\text{S}$

Correct Answer Logic:

Dipole moments (approx): $\text{NF}_3\approx0.24\ \text{D}$ (F pulls away from N lone pair, net dipole is small); $\text{HBr}\approx0.82\ \text{D}$; $\text{H}_2\text{S}\approx0.97\ \text{D}$; $\text{CHCl}_3\approx1.87\ \text{D}$. Increasing order: $\text{NF}_3 < \text{HBr} < \text{H}_2\text{S} < \text{CHCl}_3$.

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English QUESTION #2756

Question 822

Choose the correct form: 'If she had left earlier

she ___ the train.'✔️
would catch
will catch
would have caught

Correct Answer Logic:

2

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3189

Question 823

In muscle contraction, $Ca^{2+}$ ions bind to which protein to expose the binding sites on actin?

Myosin
Troponin✔️
Tropomyosin
Actin

Correct Answer Logic:

Calcium binding to troponin causes tropomyosin to move, allowing myosin to attach to actin.

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Urdu QUESTION #5113

Question 824

'میں نے جب لکھنا سیکھا تھا پہلے تیرا نام لکھا تھا' یہ شعر کس کا ہے؟

غالب
محسن بھوپالی✔️
ناصر کاظمی
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ مشہور شعر محسن بھوپالی کا ہے جو اردو غزل میں محبوب کے نام کی عقیدت کا اظہار ہے۔

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HR and Management QUESTION #6435

Question 825

The term 'organizational restructuring' requiring effective HRM includes all EXCEPT:

Flattening organizational hierarchies
Mergers and acquisitions
Joint ventures and strategic alliances
Routine employee promotions✔️

Correct Answer Logic:

Organizational restructuring involves major changes like flattening organizations (reducing management levels), mergers and acquisitions (combining independent organizations), and joint ventures/alliances. Routine employee promotions are normal HR operations, not restructuring initiatives.

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Nursing QUESTION #9140

Question 826

A primigravida at 41+3 weeks is admitted for post-term pregnancy management. Bishop score is 4. CTG is reactive. Amniotic fluid index (AFI) is 6 cm. What is the MOST appropriate next step?

Discharge home with daily kick counts only
Emergency cesarean section due to post-term status
Cervical ripening with prostaglandins followed by induction of labor✔️
Conservative management until 42 weeks with twice-weekly NST

Correct Answer Logic:

Post-term Pregnancy Management ($\geq 42$ weeks; post-dates $\geq 41$ weeks):

This patient:

41+3 weeks = post-dates (risk period begins)
Bishop score 4 = unfavorable cervix (score $\leq 6$)
AFI 6 cm = borderline oligohydramnios (normal: $8{-}24\,\text{cm}$; oligohydramnios: $\leq 5\,\text{cm}$)
Reactive CTG = reassuring currently

Risks of post-term pregnancy:

Placental insufficiency, meconium aspiration
Macrosomia, shoulder dystocia
Oligohydramnios, cord compression
Perinatal mortality increases after 41 weeks

Management: Most guidelines recommend induction of labor by 41–42 weeks. With unfavorable cervix (Bishop score 4), cervical ripening first (Prostaglandin E₂ gel/insert or misoprostol) then oxytocin induction.

AFI trending down is additional reason not to wait further. Conservative management is inappropriate here.

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Islamic Studies QUESTION #651

Question 827

Al-Qanun fi al-Tibb (The Canon of Medicine) was written by:

Al-Razi
Ibn Sina✔️
Al-Biruni
None of these

Correct Answer Logic:

Ibn Sina (Avicenna) wrote this encyclopedia which remained a medical standard for centuries.

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Chemistry QUESTION #7156

Question 828

Thallium ($Tl$) can exist in both $+1$ and $+3$ oxidation states, whereas Aluminium ($Al$) is typically found only in the $+3$ state. What is the reason for this difference?

Inert pair effect✔️
Diagonal relationship
Lattice effect
Lanthanoid contraction

Correct Answer Logic:

As we move down Group 13, the $ns^2$ electrons become increasingly reluctant to participate in bonding due to poor shielding by $d$ and $f$ electrons. This is known as the Inert Pair Effect. For Thallium, the $+1$ oxidation state is more stable than $+3$, while for lighter elements like Al, the effect is negligible.

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Urdu QUESTION #5217

Question 829

خوشی کے موقع پر جو حروف استعمال ہوتے ہیں انہیں کیا کہا جاتا ہے؟

حروفِ دکھ
حروفِ تاسف
حروفِ جار
حروفِ انبساط✔️

Correct Answer Logic:

خوشی اور مسرت کے اظہار کے لیے جو حروف استعمال ہوتے ہیں انہیں حروفِ انبساط کہتے ہیں۔

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HR and Management QUESTION #6430

Question 830

The concept of Quality of Work Life (QWL) is primarily linked to:

Job satisfaction
Employee absenteeism and turnover
Customer service quality

Only items 1 and 2
Only items 2 and 3
Only items 1 and 3
All three items: 1, 2, and 3✔️

Correct Answer Logic:

High QWL is related to job satisfaction, which is a strong predictor of absenteeism and turnover. Investments in improving QWL also pay off in the form of better customer service. All three elements are interconnected in the QWL framework.

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General Knowledge QUESTION #9026

Question 831

In 1946, which province had the only government in India headed by the All India Muslim League?

Sindh
Punjab
Bengal✔️
North West Frontier Province (NWFP)

Correct Answer Logic:

Bengal had a Muslim League government in 1946.

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Math Physics Chemistry Biology QUESTION #4295

Question 832

The following is an example of a globular protein:

Keratin
Collagen
Hemoglobin✔️
Histone

Correct Answer Logic:

Hemoglobin is a classic globular protein — roughly spherical, water-soluble, and has a functional/metabolic role (oxygen transport). Keratin and collagen are fibrous proteins.

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Chemistry QUESTION #1096

Question 833

Among compounds I (benzene sp$^2$ C–H*), II (phenylacetylene sp C–H*) and III (cyclopropane C–H*), correct order of C–H bond dissociation energy:

III $>$ II $>$ I✔️
II $>$ III $<$ I
II $>$ I $>$ III
I $>$ II $>$ III

Correct Answer Logic:

Bond dissociation energy of C–H bond depends on hybridization of carbon: sp $>$ sp$^2$ $>$ sp$^3$. Compound II (alkyne/phenylacetylene): sp C–H — highest BDE. Compound III (cyclopropane): C–H has partial sp$^2$ character due to ring strain → BDE between sp$^2$ and sp. Compound I (benzene): sp$^2$ C–H. Order: II $>$ III $>$ I. Answer: option (1) III > II > I is wrong. Correct is II > III > I = option (3).

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Quantitative Reasoning QUESTION #8018

Question 834

Choose the word that is most nearly opposite in meaning to DEPOSITION

process of congealing
process of distilling
process of eroding✔️
process of evolving

Correct Answer Logic:

DEPOSITION in geological terms means the laying down or accumulation of sediment or material. The opposite would be removal or wearing away. Process of eroding is correct: erosion removes or wears away material, while deposition adds or accumulates material—opposite processes.

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Chemistry QUESTION #453

Question 835

Which element has the largest number of allotropic forms?

Phosphorous✔️
Sulphur
Oxygen
Both A & C

Correct Answer Logic:

Phosphorus has many allotropes (white, red, black, etc.)

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3119

Question 836

Hydrochloric Acid (HCl) is secreted by which cells in the stomach?

Chief cells
Parietal cells✔️
Mucous cells
G-cells

Correct Answer Logic:

Parietal cells secrete HCl and intrinsic factor (necessary for Vitamin $B_{12}$ absorption).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3079

Question 837

'Homeostasis' is best defined as:

The breakdown of nutrients
The maintenance of a stable internal environment✔️
The process of cell division
The movement of blood through vessels

Correct Answer Logic:

Homeostasis ensures that physiological variables like temperature and pH stay within narrow limits.

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Nursing QUESTION #9240

Question 838

A patient receiving Total Parenteral Nutrition (TPN) in the ICU develops sudden onset of confusion, tachycardia, and muscle weakness 48 hours after refeeding. Lab results show: K$^+ = 2.8 \text{ mEq/L}$, PO$_4^{3-} = 0.4 \text{ mmol/L}$, Mg$^{2+} = 0.6 \text{ mmol/L}$. What syndrome is occurring?

Hyperglycemic hyperosmolar state
Refeeding syndrome✔️
Wernicke's encephalopathy
Central pontine myelinolysis

Correct Answer Logic:

Correct Answer: B — Refeeding Syndrome

Refeeding Syndrome occurs when nutrition (especially carbohydrates) is reintroduced after prolonged starvation. The sudden increase in insulin drives intracellular shift of electrolytes, causing:

Electrolyte	Change	Normal Range	Consequence
Phosphate (PO$_4^{3-}$)	↓ Critical	$0.8 - 1.5 \text{ mmol/L}$	Respiratory failure, hemolysis, cardiac arrest
Potassium (K$^+$)	↓ Hypokalemia	$3.5 - 5.0 \text{ mEq/L}$	Arrhythmias, muscle weakness
Magnesium (Mg$^{2+}$)	↓ Hypomagnesemia	$0.8 - 1.0 \text{ mmol/L}$	Arrhythmias, seizures, neuromuscular excitability

Prevention: Start TPN slowly, correct electrolytes before refeeding, monitor daily, supplement thiamine (vitamin B1) prophylactically.

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Math Physics Chemistry Biology QUESTION #735

Question 839

If the radius of circle is doubled then centripetal force becomes:

Doubled
Remains same
Half✔️
Reduces four times

Correct Answer Logic:

Centripetal force F = mv²/r. If r is doubled F becomes mv²/2r = F/2. So the force is halved.

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Physics QUESTION #372

Question 840

Resistance in RC circuit of time constant 2 seconds is 1000 Ohms. What is value of C in the circuit?

2 ? farad
20 ? farad
200 ? farad✔️
2000 ? farad

Correct Answer Logic:

? = RC, so C = ?/R = 2/1000 = 0.002 F = 2000 ?F. However, answer key shows C, which is 200 ?F

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Suggest a Question

Electrolyte	Change	Normal Range	Consequence
Phosphate (PO\(_4^{3-}\))	↓ Critical	\(0.8 - 1.5 \text{ mmol/L}\)	Respiratory failure, hemolysis, cardiac arrest
Potassium (K\(^+\))	↓ Hypokalemia	\(3.5 - 5.0 \text{ mEq/L}\)	Arrhythmias, muscle weakness
Magnesium (Mg\(^{2+}\))	↓ Hypomagnesemia	\(0.8 - 1.0 \text{ mmol/L}\)	Arrhythmias, seizures, neuromuscular excitability