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Stability condition: all poles of the closed-loop transfer function must have negative real parts (lie in the left-half s-plane). If any pole has a positive real part, the response grows without bound (unstable).

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Math Physics Chemistry Biology QUESTION #11261

Question 4

The majority of carbon dioxide in the blood is transported as:

Dissolved CO$_2$ in plasma
Carbaminohemoglobin
Bicarbonate ions (HCO$_3^-$)✔️
Carbonic acid

Correct Answer Logic:

Approximately 70% of CO$_2$ is transported as bicarbonate ions (HCO$_3^-$) in the plasma. About 20-23% binds to hemoglobin as carbaminohemoglobin, and only 7-10% is dissolved in plasma.

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Education QUESTION #1474

Question 5

According to Abd Halim Hj. Mat Diah (1989), Islamic education is a process that shapes Muslims based on:

The teachings of philosophers
The teachings of Islam✔️
The teachings of caliphs
The teachings of scientists

Correct Answer Logic:

Abd Halim Hj. Mat Diah defined Islamic education as a process for all under the purposeful guidance of educators who shape Muslims based on the teachings of Islam.

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Accounting & Finance QUESTION #6225

Question 6

The assertion that 'an asset or liability pertains to the entity at a given date' relates to which audit area?

Existence
Completeness
Rights and Obligations✔️
Valuation

Correct Answer Logic:

'Rights and Obligations' refers to the assertion that the enterprise has ownership or legal rights to the assets and liabilities recorded.

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Islamic Studies QUESTION #662

Question 7

The battle of Karbala took place in the Hijri year:

40 AH
61 AH✔️
73 AH
None of these

Correct Answer Logic:

The martyrdom of Hazrat Imam Hussain (رضي الله عنه) occurred on 10th Muharram, 61 AH.

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English QUESTION #8470

Question 8

Select the word OPPOSITE in meaning to: Entice

repel✔️
lure
charmed
enchanting

Correct Answer Logic:

Entice means attract; opposite is repel.

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Social Studies QUESTION #10026

Question 9

Which of the following has historically been marginalized rather than central within feminist theorizing?

Male domination in society
The gendered character of knowledge
The experience of Black women✔️
All of these

Correct Answer Logic:

Mainstream feminist theorizing has historically sidelined the experiences of Black women, a gap intersectionality sought to address.

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Sociology QUESTION #1671

Question 10

Talcott Parsons' 'pattern variables' framework presents five pairs of opposed value-orientation choices that structure social action and role expectations. Which of the following pairings does NOT belong to Parsons' original set of pattern variables?

Universalism versus Particularism
Achievement versus Ascription
Rationalism versus Emotionalism✔️
Affectivity versus Affective Neutrality

Correct Answer Logic:

Parsons' five pattern variables are: (1) Universalism vs. Particularism, (2) Achievement vs. Ascription, (3) Affectivity vs. Affective Neutrality, (4) Specificity vs. Diffuseness, and (5) Self-orientation vs. Collectivity-orientation. 'Rationalism vs. Emotionalism' is NOT one of Parsons' pattern variables — making it the correct answer to this 'which does NOT belong' question.

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Chemistry QUESTION #7110

Question 11

Given the half-cell reactions:
1. $Mn^{2+} + 2e^{-} \rightarrow Mn$; $E^{0} = -1.18\text{ V}$
2. $Mn^{3+} + e^{-} \rightarrow Mn^{2+}$; $E^{0} = +1.51\text{ V}$
Determine the $E^{0}$ for the disproportionation reaction $3Mn^{2+} \rightarrow Mn + 2Mn^{3+}$ and its feasibility.

-0.33 V; non-spontaneous
-0.33 V; spontaneous
-2.69 V; non-spontaneous✔️
-2.69 V; spontaneous

Correct Answer Logic:

The target reaction is $3Mn^{2+} \rightarrow Mn + 2Mn^{3+}$. This is the sum of:
Reduction: $Mn^{2+} + 2e^{-} \rightarrow Mn$ ($E^{0}_{red} = -1.18\text{ V}$)
Oxidation: $2Mn^{2+} \rightarrow 2Mn^{3+} + 2e^{-}$ ($E^{0}_{ox} = -1.51\text{ V}$)
$E^{0}_{cell} = E^{0}_{cathode} - E^{0}_{anode} = -1.18 - 1.51 = -2.69\text{ V}$. Since $E^{0}_{cell}$ is negative, the reaction is non-spontaneous.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5761

Question 12

Epinephrine is added to local anesthetics to:

Increase absorption rate
Decrease duration
Cause local vasodilation
Produce vasoconstriction and increase duration✔️

Correct Answer Logic:

Vasoconstriction slows drug absorption away from the site, increasing local duration.

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Math Physics Chemistry Biology QUESTION #11405

Question 13

Which type of enzyme would be most active in your gut after eating bread?

Amylase✔️
Protease
Lipase
Nuclease

Correct Answer Logic:

Amylase is the primary enzyme for digesting bread (starch). Salivary amylase begins starch digestion in the mouth; pancreatic amylase continues it in the small intestine, breaking starch into maltose and dextrins. Bread is primarily carbohydrate (starch), so amylase is the most relevant enzyme after consumption.

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Civil Procedure QUESTION #3755

Question 14

A landlord enters a tenant's apartment without notice to 'check the plumbing' while the tenant is at work. There is no emergency. The landlord's lease is silent on entry. This likely violates:

The Covenant against Encumbrances.
The Covenant of Quiet Enjoyment.✔️
The Warranty of Habitability.
The Rule against Perpetuities.

Correct Answer Logic:

The implied covenant of quiet enjoyment protects a tenant's right to possess and use the premises without interference from the landlord.

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Chemistry QUESTION #1433

Question 15

According to molecular orbital theory, the bond order of $\text{O}_2^{-}$ is:

1.0
1.5✔️
2.5
None of these

Correct Answer Logic:

The MO electron configuration of O$_2$ (16e$^-$): $\sigma_{1s}^2\sigma_{1s}^{*2}\sigma_{2s}^2\sigma_{2s}^{*2}\sigma_{2p}^2\pi_{2p}^4\pi_{2p}^{*2}$. Bond order of O$_2 = \frac{8-4}{2}=2$. O$_2^-$ has one extra electron: $\pi_{2p}^{*3}$, so bonding electrons = 8, antibonding = 5. Bond order $= \dfrac{8-5}{2} = \dfrac{3}{2} = 1.5$.

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General Knowledge QUESTION #170

Question 16

The Book 'Pakistan Political and Constitutional Engineering' was written by:

Hassan Askari
Ilhan Niaz
Mahboob Ahmad✔️
None of these

Correct Answer Logic:

Dr. Mahboob Ahmad is the author of this detailed historical and political study.

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Chemistry QUESTION #5534

Question 17

Sucrose undergoes acid hydrolysis via first-order kinetics with a half-life of 3.33 h at 25°C. After 9 h, the fraction of sucrose remaining is $f$. Find the value of $\log_{10}\!\left(\dfrac{1}{f}\right)\times10^{-2}$ (nearest integer). [Given: $\ln 10 = 2.303$, $\ln 2 = 0.693$]

81✔️
90
135
27

Correct Answer Logic:

$k = \frac{0.693}{3.33} = 0.208\ h^{-1}$. After $t=9$ h: $\ln\left(\frac{1}{f}\right) = kt = 0.208\times9 = 1.872$. $\log_{10}\left(\frac{1}{f}\right) = \frac{1.872}{2.303} = 0.8127$. Answer $= 0.8127\times10^{-2}\times10^{2}\approx81\times10^{-2}$, so the value is $\approx 81\times10^{-2}$, meaning the answer = 81.

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Psychology QUESTION #9936

Question 18

The most frequently occurring major psychological disorder is:

Phobias
Schizophrenia
Depression✔️
Bipolar disorder

Correct Answer Logic:

Depression (major depressive disorder) is the most common serious psychological disorder worldwide, with lifetime prevalence of 10–20%. The WHO identifies it as a leading cause of disability globally.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3540

Question 19

The drug 'Vinca' (Periwinkle) is famous for its alkaloids used in:

Diabetes
Cancer treatment (Chemotherapy)✔️
High blood pressure
Treating the common cold

Correct Answer Logic:

Vincristine and Vinblastine are essential anticancer drugs.

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Math Physics Chemistry Biology QUESTION #7780

Question 20

Lysosomes contain which type of enzymes?

Hydrolytic enzymes✔️
Meiotic enzymes
Oxidative enzymes
Mitotic enzymes

Correct Answer Logic:

Lysosomes are membrane-bound organelles containing acid hydrolases (hydrolytic enzymes) that digest macromolecules. Oxidative enzymes are in peroxisomes; meiotic/mitotic enzymes are involved in cell division.

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