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Chemistry QUESTION #478

Question 1

Al?F?SiO? is named as

Gibbsite
Emerald✔️
Bauxite
Cryolite

Correct Answer Logic:

This is beryl/emerald composition

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Mathematics QUESTION #7477

Question 2

Let $\vec{a} = \hat{i} - \hat{j}$, $\vec{b} = \hat{i} + \hat{j} + \hat{k}$ and $\vec{c}$ be a vector such that $\vec{a} \times \vec{c} + \vec{b} = \vec{0}$ and $\vec{a} \cdot \vec{c} = 4$, then $|\vec{c}|^2$ is equal to:

$\frac{19}{2}$✔️
9
8
$\frac{17}{2}$

Correct Answer Logic:

From $\vec{a} \times \vec{c} + \vec{b} = \vec{0}$, we get $\vec{a} \times \vec{c} = -\vec{b}$. Taking dot product with $\vec{a}$: $\vec{a} \cdot (\vec{a} \times \vec{c}) = -\vec{a} \cdot \vec{b}$. Since $\vec{a} \cdot (\vec{a} \times \vec{c}) = 0$, we have $\vec{a} \cdot \vec{b} = 0$, which checks: $(1)(-1)+(-1)(1)+(0)(1) = 0$. Nope: $\vec{a} = \hat{i}-\hat{j}$ (only 2D) and $\vec{b} = \hat{i}+\hat{j}+\hat{k}$, so $\vec{a} \cdot \vec{b} = 1-1 = 0$. Good. Taking magnitude: $|\vec{a} \times \vec{c}| = |\vec{b}| = \sqrt{3}$. Also $|\vec{a} \times \vec{c}|^2 = |\vec{a}|^2|\vec{c}|^2 - (\vec{a} \cdot \vec{c})^2$, so $3 = 2|\vec{c}|^2 - 16$, giving $|\vec{c}|^2 = \frac{19}{2}$.

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Logical Reasoning QUESTION #3940

Question 3

Select the pair with a similar relationship: BREAD : FLOUR

Candy : Sugar✔️
Tire : Rubber
Meat : Animal
Wine : Grapes

Correct Answer Logic:

3

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MCQs Section QUESTION #5043

Question 4

پاکستان کا قومی ترانہ حفیظ جالندھری کی کس کتاب میں شامل ہے؟

روشن چراغ
چراغِ عصر
چراغِ سحر✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

قومی ترانہ حفیظ جالندھری نے لکھا۔ یہ ان کی کتاب 'چراغِ سحر' میں شامل ہے۔

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Math Physics Chemistry Biology QUESTION #11305

Question 5

Which pigment is synthesized by the following: protoporphyrin + Fe++?

Hemoglobin✔️
Chlorophyll
Cytochrome
Myoglobin

Correct Answer Logic:

Protoporphyrin + Fe++ synthesizes hemoglobin.

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Electrical Engineering QUESTION #2150

Question 6

A $50\text{ kVA}$ transformer has a copper loss of $800\text{ W}$ at full load. What will be the copper loss at half load?

$400\text{ W}$
$200\text{ W}$✔️
$100\text{ W}$
$600\text{ W}$

Correct Answer Logic:

Copper loss varies as the square of the load ($P_{cu} \propto I^2$). At half load, the loss is $(\frac{1}{2})^2 \times 800\text{ W} = \frac{1}{4} \times 800\text{ W} = 200\text{ W}$.

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General Knowledge QUESTION #8709

Question 7

Fear of enclosed spaces is known as:

Hydrophobia
Claustrophobia✔️
Kleptophobia
Heliophobia

Correct Answer Logic:

Claustrophobia is fear of confined spaces.

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Administration QUESTION #2949

Question 8

What does "Equity Theory" suggest regarding employee motivation?

Employees are motivated only by the absolute amount of their salary
Motivation depends on the perceived fairness of rewards relative to inputs✔️
All employees should be paid exactly the same regardless of performance
None of these

Correct Answer Logic:

Equity theory posits that employees compare their input/outcome ratio with that of others to determine if they are being treated fairly.

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Dairy Food Science and Technology QUESTION #5932

Question 9

Which fatty acid is present in highest concentration in milk fat by weight?

Butyric acid (C4:0)
Oleic acid (C18:1, n-9) — approximately $25\text{–}30\%$ of total fatty acids✔️
Lauric acid (C12:0)
Linoleic acid (C18:2)

Correct Answer Logic:

Oleic acid (C18:1, n-9) is the most abundant fatty acid in bovine milk fat by weight ($\approx 25\text{–}30\%$ of total FA). Butyric acid (C4:0) gives dairy its unique flavor when released by lipolysis but is present at only $\approx 3\text{–}5\%$.

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English QUESTION #8434

Question 10

Identify the correctly spelled word:

Attraction✔️
Infraction
Revision
Intention

Correct Answer Logic:

All correct. Key says A 'Attraction'.

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Math Physics Chemistry Biology QUESTION #7739

Question 11

Which disease is primarily transmitted through sexual contact?

Gonorrhoea✔️
Influenza
Tuberculosis
Typhoid

Correct Answer Logic:

Gonorrhoea (caused by Neisseria gonorrhoeae) is a sexually transmitted infection (STI). Influenza (respiratory), TB (airborne), typhoid (fecal-oral) are not typically STIs.

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General Science and Ability QUESTION #260

Question 12

Earthquake is measured by the instrument:

Wave guide
Barometer
Seismograph✔️
Hydrometer

Correct Answer Logic:

A seismograph records the motion of the ground during an earthquake.+1

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English QUESTION #8413

Question 13

He was in _______ a hurry that he forgot his keys.

to
in✔️
with
by

Correct Answer Logic:

'In a hurry' is the correct phrase.

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Administration QUESTION #9603

Question 14

A firm's Weighted Average Cost of Capital (WACC) is 12%, and a proposed project has an Internal Rate of Return (IRR) of 9%. A manager argues the project should still be accepted because it generates positive cash flows. Which financial principle does the manager's argument violate, and what is the correct decision?

The manager violates the payback period principle — projects must recover their investment within the firm's standard payback window regardless of IRR
The manager violates the value creation principle — a project whose IRR is below the WACC destroys shareholder value because it earns less than the cost of the capital deployed in it; the project should be rejected✔️
The manager violates the diversification principle — a single project with sub-WACC returns should be bundled with higher-return projects to achieve a blended acceptable return
The manager is correct — positive cash flows always create value regardless of the cost of capital used to generate them

Correct Answer Logic:

WACC represents the minimum return required to satisfy all capital providers (debt and equity). A project with IRR below WACC earns less than what it costs to finance — it destroys economic value even while generating positive accounting cash flows. Accepting such a project dilutes shareholder returns and reduces firm value. This is the core principle of economic value added (EVA) and Net Present Value (NPV) decision rules: NPV would be negative, confirming rejection.

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General Knowledge QUESTION #9021

Question 15

The famous Khyber Pass links Peshawar with which Afghan city?

Quetta
Kandahar
Kabul✔️
Chaman

Correct Answer Logic:

The Khyber Pass connects Peshawar to Kabul.

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Sociology QUESTION #1677

Question 16

The postmodern turn in sociological theory is most fundamentally characterized by its rejection of which intellectual legacy of the Enlightenment and classical sociology?

The application of quantitative, statistical methodologies in social research✔️
The overemphasis on individual agency at the expense of social structure
Totalizing grand narratives, universal truth claims, and metanarratives that purport to explain all of social reality from a single foundational standpoint
The structural-functionalist emphasis on social consensus and system integration

Correct Answer Logic:

Postmodernism's central theoretical move in sociology is the rejection of grand narratives (Lyotard's 'metanarratives') — universal, totalizing frameworks such as Marxism, functionalism, or Enlightenment rationalism that claim to explain all of social reality. Postmodernists argue for the plurality of local, contextual, partial perspectives and the inherent instability of meaning and knowledge claims.

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General Knowledge QUESTION #4743

Question 17

Hugo Chávez was the President of which country?

Venezuela✔️
Brazil
Bolivia
Cuba

Correct Answer Logic:

Hugo Chávez served as President of Venezuela from 1999 until his death in 2013. He was known for his socialist Bolivarian Revolution policies.

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Education QUESTION #11670

Question 18

Which type of validity is established by comparing a measure against an external criterion or standard?

Content validity
Construct validity
Face validity
None of these✔️

Correct Answer Logic:

The type of validity that involves comparing a measure against an external standard is Criterion validity (also called criterion-related validity). It includes concurrent validity and predictive validity. Since this option is not listed among A, B, or C, the correct answer is D — None of these.

Correct Answer: D — None of these (Criterion validity).

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