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Study questions platform-wide or filter by specific tests with correct answers revealed.
Chemistry
QUESTION #7183
Question 1
How much water (in litres) must be added to $1 \text{ L}$ of an aqueous $HCl$ solution with a $pH$ of $1$ to result in a final solution with a $pH$ of $2$?
Correct Answer Logic:
Using the definition of $pH = -\log[H^{+}]$:
- Initial $[H^{+}] = 10^{-1} = 0.1 \text{ M}$.
- Final $[H^{+}] = 10^{-2} = 0.01 \text{ M}$.
- Using dilution formula $M_{1}V_{1} = M_{2}V_{2}$:
- $0.1 \times 1 = 0.01 \times V_{2} \implies V_{2} = 10 \text{ L}$.
- Volume to be added = $V_{2} - V_{1} = 10 - 1 = 9 \text{ L}$.
Uploaded by: Fani Warraich
Physics
QUESTION #422
Question 2
The heat produced by a current I in the wire of resistance R during time interval t is
General Knowledge
QUESTION #8647
Question 3
Which city is known as the 'City of Mosques'?
Correct Answer Logic:
Dhaka, Bangladesh is historically known as the 'City of Mosques'.
Uploaded by: Fani Warraich
Education
QUESTION #1486
Question 5
Which psychologist is known as the 'Father of Modern Educational Psychology' and founder of Behavioral Psychology?
Correct Answer Logic:
Edward Thorndike is called the Father of Modern Educational Psychology and founder of Behavioral Psychology. He developed the concept of Connectionism and the three laws of learning.
Uploaded by: Fani Warraich
Physics
QUESTION #1155
Question 6
The light can totally pass through the polaroid only if the electric field vector vibrates __________ to the polarizing vector.
Correct Answer Logic:
A polaroid transmits maximum (100%) intensity when the electric field vector of the incident light is parallel to the polarizing axis of the polaroid. When they are perpendicular, transmission is zero (Malus's Law: \(I = I_0\cos^2\theta\)).
Uploaded by: Fani Warraich
Biology
QUESTION #7256
Question 7
ICBN stands for:
Correct Answer Logic:
ICBN stands for International Code of Botanical Nomenclature. It is the set of rules governing the naming of plants, algae, and fungi. It ensures each plant has one accepted scientific name, following binomial nomenclature as proposed by Linnaeus. (Now updated to ICN — International Code of Nomenclature for algae, fungi, and plants.)
Uploaded by: Fani Warraich
General Ability and Fire Fighting
QUESTION #5592
Question 8
Which of the following is an example of the 'Starving' method of fire extinguishment?
Correct Answer Logic:
Starving a fire means removing the fuel source. Turning off a gas valve removes the fuel supply and therefore extinguishes the fire.
Uploaded by: Fani Warraich
Accounting & Finance
QUESTION #6231
Question 10
A 'Modified Auditor's Report' is issued when:
Correct Answer Logic:
A modified report is issued when the auditor's opinion is no longer 'unqualified' regarding the truth and fairness of the accounts.
Uploaded by: Fani Warraich
Math Physics Chemistry Biology
QUESTION #555
Question 11
__________ organs are functionally different but structurally alike.
Library Sciences
QUESTION #1514
Question 12
According to Katz (2002), which of the following best defines a 'reference source' in library science?
Correct Answer Logic:
Katz (2002) in 'Introduction to Reference Work' defines reference sources as works designed for consultation — to retrieve specific facts, data, or guidance — rather than for continuous reading from beginning to end.
Uploaded by: Fani Warraich
General Abilities
QUESTION #2877
Question 14
Average of $12, 15, 18, 21, 24$ is:
Correct Answer Logic:
Since the numbers are in an arithmetic progression, the average is the middle term: $18$.
Uploaded by: Fani Warraich
Information Technology
QUESTION #1119
Question 15
What is meant by refactoring code in SDLC?
Correct Answer Logic:
Code refactoring is the process of restructuring existing computer code—changing the factoring—without changing its external behavior to improve non-functional attributes.
Uploaded by: Fani Warraich
HR and Management
QUESTION #6423
Question 16
Which of the following best describes the fundamental difference between Personnel Management and Human Resource Management?
Correct Answer Logic:
The key distinction is that Personnel Management was primarily reactive and administrative (handling records, payroll, compliance), while HRM is proactive and strategic - aligning human resources with organizational goals, focusing on development, and treating people as valuable assets rather than costs.
Uploaded by: Fani Warraich
Planning
QUESTION #4959
Question 17
What is 'Induced Demand' in transportation planning?
Correct Answer Logic:
Induced Demand refers to additional vehicle trips generated when new road capacity is added, as improved travel times attract travelers who previously avoided trips or used other modes.
Uploaded by: Fani Warraich
Accounting & Finance
QUESTION #6208
Question 18
Calculate the Present Value ($PV$) of $\$1,100$ to be received in $1$ year with a $10\%$ discount rate.
Math Physics Chemistry Biology
QUESTION #4259
Question 19
Glycoproteins are formed as a result of the combination of:
Correct Answer Logic:
Glycoproteins are conjugated proteins formed by the covalent attachment of carbohydrate chains to proteins, mainly in the Golgi apparatus.
Uploaded by: Fani Warraich
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