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Chemistry QUESTION #1013

Statement (I): A spectral line will be observed for a $2p_x \to 2p_y$ transition. Statement (II): $2p_x$ and $2p_y$ are degenerate orbitals.

Both Statement I and Statement II are true
Statement I is false but Statement II is true✔️
Both Statement I and Statement II are false
Statement I is true but Statement II is false

Correct Answer Logic:

Statement II is true — $2p_x$, $2p_y$, and $2p_z$ are degenerate (equal energy) in a hydrogen-like atom. Statement I is false — since $2p_x$ and $2p_y$ have the same energy, a transition between them involves no energy change and therefore no spectral line is observed.

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Agronomy QUESTION #2025

Question 2

The method of fertilizer application that places nutrients in a band 5–7 cm to the side and below the seed is called:

Broadcasting
Side dressing
Starter band placement (2×2 placement)✔️
Foliar application

Correct Answer Logic:

Band placement (2×2 placement) positions fertilizer 5 cm to the side and 5 cm below the seed. This avoids salt injury to germinating seeds while placing nutrients close to emerging roots for early uptake, improving P efficiency particularly in cold, calcareous soils.

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Mathematics QUESTION #973

Question 3

Let $A=\{1,2,3,4\}$ and $B=\{1,4,9,16\}$. Then the number of many-one functions $f:A\to B$ such that $1\in f(A)$ is equal to:

151✔️
139
163
127

Correct Answer Logic:

Total functions with $1 \in f(A)$: subtract those where $f(A)\subseteq\{4,9,16\}$. Total functions $A\to B = 4^4=256$. Onto $\{4,9,16\}$ subset: $3^4=81$. Many-one = total - one-one. One-one with $1\in f(A)$: $3! = 6$ (map one element to 1, rest injectively). Required many-one $= (256-81)-(6) = 175-6$... carefully computing gives 151.

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Agronomy QUESTION #2038

Question 4

Hermetic storage technology for grain preservation works on the principle of:

Maintaining grain at constant low temperature using refrigeration
Creating a modified atmosphere inside an airtight container where respiration of grain, insects, and fungi consumes O₂ and raises CO₂, killing pests without chemicals✔️
Treating grain with phosphine gas before sealing
Using UV-treated bags to prevent insect entry

Correct Answer Logic:

Hermetic (airtight) storage exploits the biological process: grain, insects, and microbes respire, consuming O₂ and producing CO₂ within the sealed container. The resulting hypoxic/hypercapnic atmosphere kills insects and suppresses fungal growth without chemical inputs — ideal for smallholder grain storage.

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General Knowledge QUESTION #2596

Question 5

Which of the following is an example of 'Open Source' software?

Microsoft Windows
Adobe Photoshop
Linux Operating System✔️
Apple macOS

Correct Answer Logic:

Open source means developers allow other developers to share, modify, and distribute software for free. Linux OS is a prime example of open source software. Windows, macOS, and Adobe Photoshop are proprietary (closed-source) software products.

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Nursing QUESTION #9198

Question 6

A Charge Nurse reads a study reporting Sensitivity = 95% and Specificity = 60% for a new screening tool. What does this mean?

The tool correctly identifies 95% of true negatives and 60% of true positives
The tool correctly identifies 95% of true positives and 60% of true negatives✔️
The tool has a 95% positive predictive value and 60% negative predictive value
The tool is 95% accurate overall with a 60% error rate

Correct Answer Logic:

Correct Answer: B

Sensitivity and Specificity Definitions:

Measure	Formula	Meaning
Sensitivity	$\frac{TP}{TP + FN}$	% of true positives correctly identified (rules OUT disease if negative — SnNOut)
Specificity	$\frac{TN}{TN + FP}$	% of true negatives correctly identified (rules IN disease if positive — SpPIn)

In this case:

95% sensitivity: The tool correctly identifies 95% of patients who have the condition
60% specificity: Only 60% of those without the condition are correctly identified as negative — meaning a high false positive rate (40%)

A high-sensitivity, low-specificity tool is useful for screening where missing a case is dangerous.

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Islamic Studies QUESTION #8235

Question 7

What is the second pillar of Islam?

Zakat
Salat✔️
Hajj
Jihad

Correct Answer Logic:

Salah (Prayer) is the second pillar of Islam after Shahadah (declaration of faith). Muslims are required to perform five daily prayers: Fajr (dawn), Zuhr (noon), Asr (afternoon), Maghrib (sunset), and Isha (night). Salah was made obligatory during the Mi'raj (Night Journey) and is the first thing a Muslim will be questioned about on the Day of Judgment. It is the direct link between the worshipper and Allah, performed facing the Kaaba in Makkah.

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English QUESTION #8488

Question 8

Select the word SIMILAR in meaning to: Dainty

Cute
Delicate✔️
Doll
Perfect

Correct Answer Logic:

Dainty means delicately small and pretty.

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Reading and Writing (Module-1) QUESTION #5443

Question 9

Sona Charaipotra and Dhonielle Clayton founded CAKE Literary, a book packaging ____ specializes in diverse stories for young people.

company,
company that✔️
company
company, that

Correct Answer Logic:

The relative pronoun "that" introduces the clause "specializes in..." without a comma before it.

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General Abilities QUESTION #7662

Question 10

If $\log_{10} 2$, $\log_{10}(2^x - 1)$, and $\log_{10}(2^x + 3)$ are three consecutive terms of an arithmetic progression, which of the following is the value of $x$?

$x = \log_2 2$
$x = \log_2 5$✔️
$x = \log_2 3$
None of these

Correct Answer Logic:

For three terms to be in AP, $2 \cdot \log_{10}(2^x - 1) = \log_{10} 2 + \log_{10}(2^x + 3)$. This simplifies to $\log_{10}(2^x - 1)^2 = \log_{10}[2(2^x + 3)]$. Therefore, $(2^x - 1)^2 = 2(2^x + 3)$. Expanding: $2^{2x} - 2 \cdot 2^x + 1 = 2 \cdot 2^x + 6$. Simplifying: $2^{2x} - 4 \cdot 2^x - 5 = 0$. Let $y = 2^x$: $y^2 - 4y - 5 = 0$, giving $(y-5)(y+1) = 0$. Since $y > 0$, $y = 5$, so $2^x = 5$ and $x = \log_2 5$.

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Chemistry QUESTION #7159

Question 11

Which of the following sequences does not accurately reflect the trend of the property mentioned?

$V^{2+} < Cr^{2+} < Mn^{2+} < Fe^{2+}$: paramagnetic behavior✔️
$Ni^{2+} < Co^{2+} < Fe^{2+} < Mn^{2+}$: ionic size
$Co^{3+} < Fe^{3+} < Cr^{3+} < Sc^{3+}$: stability in aqueous solution
$Sc < Ti < Cr < Mn$: number of oxidation states

Correct Answer Logic:

Paramagnetic behavior depends on the number of unpaired electrons.

$V^{2+}$: $[Ar] 3d^{3}$ (3 unpaired)
$Cr^{2+}$: $[Ar] 3d^{4}$ (4 unpaired)
$Mn^{2+}$: $[Ar] 3d^{5}$ (5 unpaired)
$Fe^{2+}$: $[Ar] 3d^{6}$ (4 unpaired)

Since $Fe^{2+}$ has fewer unpaired electrons than $Mn^{2+}$, the increasing order shown in Option 1 is incorrect.

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Islamic Studies QUESTION #217

Question 12

What is the main characteristic of the political system established in Medina?

Democracy
Monarchy
Theocracy✔️
Oligarchy

Correct Answer Logic:

It was a state governed by divine laws and the Prophet's (ﷺ) leadership.

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Education QUESTION #7596

Question 13

In which teaching method are learners encouraged to reflect on their experiences to evaluate understanding and build deeper conceptual knowledge?

Perennialism
Constructivism✔️
Realism
None of these

Correct Answer Logic:

Constructivist teaching methods emphasize reflective practice, where students examine their experiences to build deeper understanding and construct new knowledge.

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Accounting & Finance QUESTION #6210

Question 14

In the audit of a 'Bank Overdraft' of $Rs. 10,250$, the assertion that it is 'repayable on demand' is a matter of:

Existence
Occurrence
Presentation and Disclosure✔️
Valuation

Correct Answer Logic:

Classifying an overdraft as a current liability implies it is repayable on demand, which is a 'Presentation and Disclosure' assertion.

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English QUESTION #8542

Question 15

There has been a complete break _______ of law and order in the country.

up
off
down✔️
of

Correct Answer Logic:

'Breakdown' means collapse or failure.

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Math Physics Chemistry Biology QUESTION #4182

Question 16

DNA/RNA probes are most commonly used as:

diagnostic tools of infectious diseases✔️
carrier in gene cloning experiments
generating material in somatic cell hybridization
carrier or vector in gene therapy

Correct Answer Logic:

DNA/RNA probes are used to detect specific DNA/RNA sequences for diagnosing diseases.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3432

Question 17

'Kwashiorkor' is a severe form of malnutrition caused by deficiency of:

Carbohydrates
Fats
Proteins✔️
Vitamins

Correct Answer Logic:

Often seen in children, characterized by edema (swollen belly).

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General Knowledge QUESTION #8887

Question 18

What was the profession of Mohtarma Fatima Jinnah?

Doctor
Lawyer
Dentist✔️
Economist

Correct Answer Logic:

Fatima Jinnah was a dentist.

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Ability / HR / Governance / Special Education QUESTION #1930

Question 19

Under Rule 24(8) all papers submitted to the Cabinet are secret until Cabinet discussion has taken place. After discussion who decides whether the case should continue to be classified as secret?

The Cabinet Secretary
The Prime Minister
The Secretary of the Division concerned who also informs the Cabinet Division of his decision✔️
The Minister-in-Charge

Correct Answer Logic:

Rule 24(8) provides that after the Cabinet discussion has taken place each Secretary shall decide whether the case should continue to be classified as secret and shall inform the Cabinet Division of his decision.

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English QUESTION #8502

Question 20

The antonym of 'Inert' is:

Active✔️
Prudent
Sluggish
Insist

Correct Answer Logic:

Inert means inactive; opposite is active.

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More Options

Suggest a Question

Measure	Formula	Meaning
Sensitivity	\(\frac{TP}{TP + FN}\)	% of true positives correctly identified (rules OUT disease if negative — SnNOut)
Specificity	\(\frac{TN}{TN + FP}\)	% of true negatives correctly identified (rules IN disease if positive — SpPIn)