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Study questions platform-wide or filter by specific tests with correct answers revealed.
Chemistry
QUESTION #1013
Question 1
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.
Correct Answer Logic:
Statement II is true โ \(2p_x\), \(2p_y\), and \(2p_z\) are degenerate (equal energy) in a hydrogen-like atom. Statement I is false โ 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.
Uploaded by: Fani Warraich
Agronomy
QUESTION #2025
Question 2
The method of fertilizer application that places nutrients in a band 5โ7 cm to the side and below the seed is called:
Correct Answer Logic:
Band placement (2ร2 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:
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:
Correct Answer Logic:
Hermetic (airtight) storage exploits the biological process: grain, insects, and microbes respire, consuming Oโ and producing COโ within the sealed container. The resulting hypoxic/hypercapnic atmosphere kills insects and suppresses fungal growth without chemical inputs โ 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?
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?
Correct Answer Logic:
Correct Answer: B
Sensitivity and Specificity Definitions:
In this case:
Sensitivity and Specificity Definitions:
| Measure | Formula | Meaning |
|---|---|---|
| Sensitivity | \(\frac{TP}{TP + FN}\) | % of true positives correctly identified (rules OUT disease if negative โ SnNOut) |
| Specificity | \(\frac{TN}{TN + FP}\) | % of true negatives correctly identified (rules IN disease if positive โ SpPIn) |
- 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 โ meaning a high false positive rate (40%)
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Islamic Studies
QUESTION #8235
Question 7
What is the second pillar of Islam?
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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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.
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 \(x\)?
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?
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)
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Islamic Studies
QUESTION #217
Question 12
What is the main characteristic of the political system established in Medina?
Correct Answer Logic:
It was a state governed by divine laws and the Prophet's (๏ทบ) 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?
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:
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.
Math Physics Chemistry Biology
QUESTION #4182
Question 16
DNA/RNA probes are most commonly used as:
Correct Answer Logic:
DNA/RNA probes are used to detect specific DNA/RNA sequences for diagnosing diseases.
Uploaded by: Fani Warraich
Paper-I (Anatomy/Physiology and Biochemistry/Microbiology)
QUESTION #3432
Question 17
'Kwashiorkor' is a severe form of malnutrition caused by deficiency of:
Correct Answer Logic:
Often seen in children, characterized by edema (swollen belly).
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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?
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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