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Solubility of sulfates depends on the balance between lattice energy and hydration energy. As we move down the group, both decrease, but lattice energy decreases slowly due to the large size of the sulfate ion. However, $Be^{2+}$ is exceptionally small, giving it a very high hydration enthalpy that exceeds its lattice enthalpy, making $BeSO_{4}$ highly soluble.

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General Abilities QUESTION #2827

Question 1124

The sum of two consecutive even numbers is 94. Find the larger number.

46
48✔️
50
52

Correct Answer Logic:

Let the numbers be $n$ and $n+2$. Then $n + (n+2) = 94 \Rightarrow 2n + 2 = 94 \Rightarrow 2n = 92 \Rightarrow n = 46$. Larger number $= 46 + 2 = 48$.

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Chemistry QUESTION #446

Question 1125

Alkanes containing __________ carbon atoms are waxy solids.

up to 4
5 to 17
18 or more✔️
None of these

Correct Answer Logic:

Alkanes with 18+ carbons are waxy solids

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CISA QUESTION #6827

Question 1126

In evaluating an organization's business continuity plan, an auditor finds that Recovery Time Objective (RTO) is 4 hours but current recovery capabilities require 12 hours. What should be the auditor's PRIMARY recommendation?

Update the BCP document to reflect 12-hour RTO
Assess the gap between RTO requirement and actual capability then develop remediation plan✔️
Reduce RTO to 2 hours
Cancel the BCP

Correct Answer Logic:

When a gap exists between required and actual recovery capabilities, the organization faces unmitigated risk. The auditor should highlight this gap and recommend analysis of whether to: improve capabilities to meet the 4-hour RTO, accept the risk of longer recovery, or adjust business requirements. Simply updating documentation without addressing the gap provides no risk reduction.

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Biology Zoology Botany QUESTION #1381

Question 1127

The phase of mitosis in which chromosomes align at the cell's equator is called:

Anaphase
Telophase
Metaphase✔️
Prophase

Correct Answer Logic:

During metaphase (the middle phase of mitosis), chromosomes become maximally condensed and are aligned along the cell's equatorial plane (metaphase plate) by spindle fibres attached to the centromeres (kinetochores). This alignment ensures accurate segregation of sister chromatids to the two daughter cells in the subsequent anaphase.

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Nursing QUESTION #9176

Question 1128

In management of nursing services, delegation involves which of the following essential components?

Assignment of duties
Granting of authority
Creation of accountability
Retention of responsibility by the delegator

Only 1 and 2
Only 1, 2, and 3
All four components✔️
Only 2 and 3

Correct Answer Logic:

Delegation in nursing management has four essential components:

Assignment of duties/tasks — specifying what needs to be done
Granting of authority — giving the nurse the power to act
Creation of accountability — the delegate is answerable for results
Retention of responsibility — the delegator (Head Nurse) remains ultimately responsible

Key principle: Responsibility cannot be fully delegated. A Head Nurse who delegates a task to a Charge Nurse still remains responsible for the outcome. Effective delegation improves efficiency and staff development.

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Education QUESTION #6768

Question 1129

A teacher constructs a 50-item MCQ test. Items 1–25 cover knowledge-level outcomes (p-values around 0.85–0.90) and items 26–50 cover application-level outcomes (p-values around 0.40–0.55). Which statement about this test's suitability for norm-referenced interpretation is MOST accurate?

Both halves are equally suitable for NRT because they cover all Bloom's levels
The application-level items (items 26–50) are more suitable for NRT because their moderate difficulty creates greater score variance, enabling better discrimination among examinees✔️
The knowledge-level items are better for NRT because easier items reduce test anxiety
NRT requires all items to have the same difficulty level, so the test is unsuitable

Correct Answer Logic:

Norm-referenced tests require substantial score variance to rank examinees accurately. Items with p-values between 0.40 and 0.60 are near optimal for NRT because they generate the widest spread of scores. Items with very high p-values (0.85–0.90) produce ceiling effects and minimal variance, reducing the test's discriminating power — making them less suitable for NRT purposes.

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General Abilities QUESTION #2831

Question 1130

Simplify: $\dfrac{2^5 \times 4^3}{8^2 \times 2}$

4
8✔️
16
32

Correct Answer Logic:

$2^5 = 32$, $4^3 = (2^2)^3 = 2^6 = 64$, $8^2 = (2^3)^2 = 2^6 = 64$. Numerator $= 2^5 \times 2^6 = 2^{11}$. Denominator $= 2^6 \times 2^1 = 2^7$. Result $= 2^{11-7} = 2^4 = 16$.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5733

Question 1131

In a 'Grid Layout' pharmacy design, how are the fixtures and counters typically installed?

In circles and arches
At right angles to one another✔️
In a random, unstructured flow
Only against the back wall

Correct Answer Logic:

In grid layout, fittings are at right angles in straight and parallel lines.

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Math Physics Chemistry Biology QUESTION #4258

Question 1132

The main role of mRNA during protein synthesis is to:

Carry genetic information for protein synthesis✔️
Stabilize ribosome
Deliver amino acids
Provide platform for protein synthesis

Correct Answer Logic:

mRNA (messenger RNA) carries the genetic code from DNA to the ribosome, serving as the template for protein synthesis.

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Urdu QUESTION #5102

Question 1133

نو تیرہ بتانا کا مطلب ہے؟

صاف جواب دینا
لڑائی کروانا
ٹال دینا✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

نو تیرہ بتانا محاورے کا مطلب ہے بات ٹال دینا یا روانگی کا راستہ دکھانا۔

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General Knowledge QUESTION #8893

Question 1134

Which component of diet helps prevent constipation?

Minerals
Fiber (roughage)✔️
Protein
Vitamins

Correct Answer Logic:

Dietary fiber promotes regular bowel movements.

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Journalism / Mass Communication QUESTION #6353

Question 1135

Harold Lasswell's (1948) formula of communication consists of five analytical components. Which sequence below correctly maps each component to its corresponding area of research?

Who → Content Research; Says What → Control Research; Channel → Audience Research; To Whom → Medium Research; Effect → Effects Research
Who → Control Research; Says What → Content Research; In What Channel → Medium Research; To Whom → Audience Research; With What Effect → Effects Research✔️
Who → Effects Research; Says What → Medium Research; Channel → Control Research; To Whom → Content Research; Effect → Audience Research
Who → Audience Research; Says What → Effects Research; Channel → Content Research; To Whom → Control Research; Effect → Medium Research

Correct Answer Logic:

Lasswell's formula is one of the most widely cited early models of mass communication. The sociologist Harold Lasswell (1948) proposed analysing mass media by asking five questions, each of which corresponds to a distinct field of scholarly inquiry:

Who? → Control Research (who owns, controls, and regulates media)
Says What? → Content Research (what messages are being sent)
In What Channel? → Medium Research (the technology used to transmit)
To Whom? → Audience Research (who is receiving the message)
With What Effect? → Effects Research (what impact does the message have)

Lasswell was primarily concerned with mass communication and propaganda, so his model is designed to direct researchers toward the kind of systematic inquiry needed to understand and evaluate media power.

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English QUESTION #4458

Question 1136

Which of the following sentences is INCORRECTLY written?

I was given a red-coloured tie by one of my friends
A red-coloured tie was give to me by one of my friends✔️
One of my friend gave me a red-coloured tie.
None of these.

Correct Answer Logic:

Option B is incorrect because 'give' should be the past participle 'given' in a passive voice construction.

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General Knowledge QUESTION #4681

Question 1137

Dan Quayle held which of the following positions?

Mexican footballer
American Politician✔️
Prime Minister of Brazil
Secretary General of NATO

Correct Answer Logic:

Dan Quayle served as the 44th Vice President of the United States under President George H.W. Bush (1989–1993).

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Physics QUESTION #994

Question 1138

Assertion (A): A simple pendulum taken to a planet with mass 4 times and radius 2 times that of Earth has the same time period. Reason (R): The mass of the pendulum remains unchanged on Earth and the planet.

(A) is false but (R) is true
(A) is true but (R) is false
Both (A) and (R) are true and (R) is the correct explanation of (A)
Both (A) and (R) are true but (R) is NOT the correct explanation of (A)✔️

Correct Answer Logic:

Planet's $g' = \frac{GM'}{R'^2} = \frac{G\cdot4M}{(2R)^2} = \frac{4GM}{4R^2} = g$. So time period $T=2\pi\sqrt{L/g}$ remains same — (A) is true. (R) is also true but the reason is equal $g$, not unchanged mass. So (R) is not the correct explanation.

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Physics QUESTION #7839

Question 1139

Magnetic field inside a solenoid is:

Along its axis✔️
Circular around wires
Strongest at ends
Zero when current flows

Correct Answer Logic:

Inside ideal solenoid, field is uniform and parallel to axis.

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Agronomy QUESTION #2064

Question 1140

Zinc deficiency, the most widespread micronutrient deficiency in Pakistan and South Asia, is characterized by:

Dark green, crinkled older leaves with necrotic margins
Interveinal chlorosis and stunting of older leaves due to Zn mobility
Stunted young leaves, shortened internodes (little leaf/khaira disease in rice), interveinal chlorosis on young leaves, and delayed maturity — due to Zn's role in auxin synthesis and enzyme activation✔️
Pale yellow coloration of the entire plant with early senescence

Correct Answer Logic:

Zn deficiency causes little leaf/rosette in fruit trees, khaira disease in rice, and white bud in maize. Young leaves are affected first (Zn is relatively immobile in phloem). Zn activates >300 enzymes, is required for IAA synthesis, RNA polymerase, and ribosome structure. ZnSO₄ (21% Zn) applied at 25 kg/ha corrects deficiency.

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