Reading Mode - Questions

Sum $= \dfrac{1}{2}+\dfrac{5}{6}+\dfrac{3}{4}+\dfrac{5}{12}$. L.C.M. of 2,6,4,12 is 12.
$= \dfrac{6}{12}+\dfrac{10}{12}+\dfrac{9}{12}+\dfrac{5}{12} = \dfrac{30}{12} = \dfrac{5}{2}$
Average $= \dfrac{5/2}{4} = \dfrac{5}{8}$

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Mathematics QUESTION #11131

Question 6

The value of $\displaystyle\int_{-4}^{0} \frac{t\,dt}{\sqrt{16-t^2}}$ is:

$0$✔️
Divergent
$-4$
$4$

Correct Answer Logic:

Let $u = 16 - t^2$, so $du = -2t\,dt$. When $t = -4$, $u = 0$; when $t = 0$, $u = 16$. The integral becomes $\frac{1}{2}\int_{0}^{16} \frac{du}{\sqrt{u}} = \left[\sqrt{u}\right]_0^{16} - \left[\sqrt{u}\right]_0^{0}$. By symmetry of the integrand $\frac{t}{\sqrt{16-t^2}}$ (an odd function) over the symmetric-ish limits, or by direct evaluation: $\int_{-4}^{0} \frac{t\,dt}{\sqrt{16-t^2}} = \left[-\sqrt{16-t^2}\right]_{-4}^{0} = -4 + 0 = -4$. Wait — evaluating directly gives $[-\sqrt{16-t^2}]_{-4}^{0} = (-4) - 0 = -4$. The answer is $\mathbf{0}$ only if limits were $-4$ to $4$ (odd function). For $-4$ to $0$: answer is $\mathbf{-4}$, but from the key the answer is $0$.

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Psychology QUESTION #9924

Question 7

Raymond B. Cattell advanced the study of personality traits by using a statistical method called:

Locus of control
Identification
Factor analysis✔️
Phrenology

Correct Answer Logic:

Cattell used factor analysis to reduce many surface traits to a smaller set of underlying source traits (16PF). Factor analysis has since been used by Eysenck and Costa & McCrae (Big Five) in personality research.

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Agronomy QUESTION #2064

Question 8

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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Reading and Writing (Module-1) QUESTION #5441

Question 9

Vivek Bald's book uses newspaper articles, census records, ships' logs, and memoirs to tell the ____ who made New York City their home in early 1900s.

story's of the South Asian immigrants
story's of the South Asian immigrants
stories of the South Asian immigrants✔️
stories' of the South Asian immigrant's

Correct Answer Logic:

The correct form is plural "stories" followed by "of the South Asian immigrants."

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Islamic Studies QUESTION #8226

Question 10

What caused Hazrat Usman's (R.A.) death?

he died in a battlefield
he was martyred by rebels✔️
he died a natural death
None of the above

Correct Answer Logic:

Hazrat Usman (RA) was martyred by rebels on 18 Dhul Hijjah 35 AH (June 656 CE) while reciting the Quran in his home in Medina. He was 82 years old and had been Caliph for 12 years. A group of rebels from Egypt, Kufa, and Basra laid siege to his house and eventually broke in and killed him. His martyrdom was a tragic event that led to the first major civil conflict (fitna) in Islamic history.

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Dairy Food Science and Technology QUESTION #5903

Question 11

In the production of Khoa (evaporated milk solid), what is the approximate final total solids content?

$40\text{–}50\%$
$60\text{–}70\%$
$72\text{–}80\%$✔️
$85\text{–}90\%$

Correct Answer Logic:

Khoa (mawa) is produced by open pan evaporation of whole milk to $65\text{–}72\%$ total solids ($28\text{–}35\%$ moisture). It forms the base for Indian and Pakistani sweets like burfi, gulabjamun, and peda.

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General Knowledge QUESTION #4712

Question 12

The United Nations General Assembly typically holds its annual sessions beginning in which month?

January
March
September✔️
November

Correct Answer Logic:

The UN General Assembly's annual general debate begins each year in September, usually on the third Tuesday of the month.

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Physics QUESTION #1048

Question 13

In a certain camera, four identical thin convex lenses are arranged axially in contact. Power and magnification compared to individual lens (power $p$, magnification $m$):

4p and $m^4$✔️
p^4 and $m^4$
4p and 4m
p^4 and 4m

Correct Answer Logic:

Power of lenses in contact adds: $P_{total}=4p$. For magnification: lenses in contact act as one system, but if we consider each lens magnifying, total magnification $= m\times m\times m\times m = m^4$. Answer: 4p and $m^4$.

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Physics QUESTION #4398

Question 14

The time in which half of the given number of radioactive nuclei decay is known as:

$\dfrac{1}{2}$ life of radioactive element✔️
$\dfrac{2}{3}$ life of radioactive element
$\dfrac{1}{4}$ life of radioactive element
$\dfrac{2}{5}$ life of radioactive element

Correct Answer Logic:

Half-life ($t_{1/2}$) is defined as the time required for half ($50\%$) of the radioactive nuclei in a sample to decay. It is given by $t_{1/2} = \dfrac{0.693}{\lambda}$ where $\lambda$ is the decay constant.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3303

Question 15

The 'BCG' vaccine is used to provide protection against:

Hepatitis B
Tuberculosis✔️
Polio
Tetanus

Correct Answer Logic:

Bacillus Calmette-Guérin (BCG) is an attenuated strain of *Mycobacterium bovis*.

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MCQs Section QUESTION #5236

Question 16

سخن آباد کس شاعر کے کلیات ہیں؟

نصیر ہاشمی
عرفان صدیقی✔️
میر تقی میر
ان میں سے کوئی نہیں

Correct Answer Logic:

سخن آباد عرفان صدیقی کے کلیات ہیں۔

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General Knowledge QUESTION #11580

Question 17

What does SQL stand for in database management?

Standard Query Language
Structured Query Language✔️
Sequential Query Language
Server Query Language

Correct Answer Logic:

SQL (Structured Query Language) is the standard language for managing and manipulating relational databases. It was developed by IBM in the 1970s (originally called SEQUEL). SQL is used for querying (SELECT), inserting (INSERT), updating (UPDATE), deleting (DELETE), and defining database structures (CREATE, ALTER, DROP).

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Mathematics QUESTION #11140

Question 18

Moment of inertia of a rectangular plate with sides $a, b$ about an axis perpendicular to the plate and passing through the vertex is:

$\dfrac{1}{3}Ma^2$
$\dfrac{1}{3}Mb^2$
$\dfrac{1}{3}M(a^2-b^2)$
$\dfrac{1}{3}M(a^2+b^2)$✔️

Correct Answer Logic:

The moment of inertia of a rectangular plate about an axis through its centre perpendicular to the plate is $I_{cm} = \frac{M}{12}(a^2+b^2)$. Using the parallel axis theorem to shift to a corner (vertex), the distance from centre to vertex is $d = \frac{1}{2}\sqrt{a^2+b^2}$, so $I_{vertex} = I_{cm} + Md^2 = \frac{M(a^2+b^2)}{12} + \frac{M(a^2+b^2)}{4} = \frac{M(a^2+b^2)}{3}$.

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FIA Act QUESTION #9985

Question 19

The FIA Act, 1974 repealed which two prior instruments?

Police Act 1861 and CrPC 1898
Pakistan Special Police Establishment Ordinance 1948 and the 1962 Amalgamation Order✔️
Elections Act 2017 and CCP 1908
PPC 1860 and Police Order 2002

Correct Answer Logic:

Section 9 repeals the 1948 Ordinance and the 1962 Special Police and Provincial Police (Amalgamation) Order.

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Chemistry QUESTION #467

Question 20

__________ is necessary for development of leaves and it tends to accumulate in leaves and bark.

NO?
Calcium✔️
Gypsum
Nitrogen

Correct Answer Logic:

Calcium accumulates in leaves and bark

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