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The 'Fourth Estate' is a term referring to the press and news media, representing their role as a social force in addition to the traditional three estates of government.

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Psychology QUESTION #9890

Question 4927

A conversion disorder is characterized by:

Functional impairment of a limb or sensory ability with no apparent physical cause✔️
Severe pain with no apparent cause
A constant fear of becoming seriously ill
Frequently vague complaints of physical symptoms

Correct Answer Logic:

Conversion disorder (now Functional Neurological Symptom Disorder in DSM-5) involves neurological symptoms — paralysis, blindness, numbness — that cannot be explained by any detectable neurological disease. Symptoms are genuine but psychologically induced.

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Agronomy QUESTION #2018

Question 4928

Minimum tillage is advocated in modern agronomy primarily because it:

Increases soil compaction which improves root anchorage
Reduces soil erosion, preserves organic matter, lowers fuel costs, and maintains soil biotic activity✔️
Completely eliminates the need for herbicide application
Increases soil bulk density to improve water retention

Correct Answer Logic:

Minimum tillage (conservation tillage) reduces the number and intensity of tillage operations. This conserves soil structure, reduces erosion, maintains soil organic matter and microbial activity, and significantly reduces labor and fuel costs — central to sustainable crop production.

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Mathematics QUESTION #4093

Question 4929

Using the $\varepsilon$-$\delta$ definition of limit, $\displaystyle\lim_{x\to2}\frac{x^3-4}{x^2+1}$ equals (by direct substitution since denominator is nonzero at $x=2$):

Indeterminate form $0/0$
$\dfrac{4}{5}$✔️
$\dfrac{8}{5}$
$\dfrac{4}{3}$

Correct Answer Logic:

Since the denominator $x^2+1\neq0$ at $x=2$, direct substitution applies: numerator $=2^3-4=8-4=4$, denominator $=2^2+1=5$. The limit equals $\dfrac{4}{5}$. The $\varepsilon\text{-}\delta$ proof formally verifies this value.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3680

Question 4930

'Wool Fat' (Lanolin) is obtained from the wool of:

Sheep (Ovis aries)✔️
Goat
Cow
Rabbit

Correct Answer Logic:

Lanolin is used as a base for ointments and creams.

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Home Economics QUESTION #6274

Question 4931

Which chromosome abnormality is the primary cause of Down Syndrome?

XXY Syndrome
Trisomy 21✔️
Monosomy X
Trisomy 18

Correct Answer Logic:

Down Syndrome occurs when an individual has a full or partial extra copy of chromosome 21.

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Math Physics Chemistry Biology QUESTION #526

Question 4932

The soluble part of the cytoplasm is termed as

Cisternae
Cytosol✔️
Endocytosis
Both A and B

Correct Answer Logic:

Cytosol is the soluble portion of cytoplasm

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3397

Question 4933

Which vitamin is 'Fat-Soluble' and essential for blood clotting?

Vitamin B12
Vitamin C
Vitamin K✔️
Vitamin A

Correct Answer Logic:

Vitamins A, D, E, and K are fat-soluble; B and C are water-soluble.

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MBBS QUESTION #10263

Question 4934

A patient with a small cell lung carcinoma develops hyponatremia due to syndrome of inappropriate antidiuretic hormone secretion (SIADH). The hyponatremia is best explained by:

Unregulated ADH action causing excessive free water reabsorption in the collecting duct, producing dilutional hyponatremia with concentrated urine despite low plasma osmolality✔️
Excessive urinary sodium loss due to aldosterone deficiency
Reduced ADH secretion causing polyuria and dilute urine
Primary loss of extracellular fluid volume from vomiting

Correct Answer Logic:

In SIADH, ADH is secreted independent of normal osmotic or volume control (often from an ectopic tumor source), causing continued water reabsorption despite low plasma osmolality — producing euvolemic dilutional hyponatremia with inappropriately concentrated urine.

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English QUESTION #7873

Question 4935

Complete the analogy: Blueprint is to architect as algorithm is to ______.

Designer
Engineer
Mathematician
Programmer✔️

Correct Answer Logic:

An architect uses a blueprint to design a building. Similarly, a programmer uses an algorithm to design a computer program. While engineers and mathematicians also use algorithms, the closest analogy is with a programmer.

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Chemistry QUESTION #7499

Question 4936

An aqueous solution contains an unknown concentration of Ba$^{2+}$. When 50 mL of a 1 M Na$_2$SO$_4$ solution is added, BaSO$_4$ just begins to precipitate. The final volume is 500 mL and $K_{sp}(\text{BaSO}_4) = 1 \times 10^{-10}$. What was the original concentration of Ba$^{2+}$?

$1.1 \times 10^{-9}$ M
$1.0 \times 10^{-10}$ M
$5 \times 10^{-9}$ M
$2 \times 10^{-9}$ M✔️

Correct Answer Logic:

At the point of precipitation: $[\text{Ba}^{2+}][\text{SO}_4^{2-}] = K_{sp} = 1 \times 10^{-10}$

Find $[\text{SO}_4^{2-}]$ in the final mixture:

Moles of SO$_4^{2-}$ added $= 0.050\ \text{L} \times 1\ \text{M} = 0.05\ \text{mol}$

Final volume $= 500\ \text{mL} = 0.5\ \text{L}$

$[\text{SO}_4^{2-}]_{\text{final}} = \dfrac{0.05}{0.5} = 0.1\ \text{M}$

Find $[\text{Ba}^{2+}]$ in the final mixture:

$[\text{Ba}^{2+}]_{\text{final}} = \dfrac{K_{sp}}{[\text{SO}_4^{2-}]} = \dfrac{1\times10^{-10}}{0.1} = 1\times10^{-9}\ \text{M}$

Back-calculate original concentration: Final volume is 10× original Ba$^{2+}$ volume (500 mL total, 450 mL original solution).

Original $[\text{Ba}^{2+}] = 1\times10^{-9} \times \dfrac{500}{450} \approx \mathbf{2\times10^{-9}}\ \text{M}$

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Social Studies QUESTION #10052

Question 4937

A political leader who holds no formal office and whose authority is based on personal influence rather than institutional power is called a:

Chief
Headman✔️
Lord
None of these

Correct Answer Logic:

A Headman leads informally through influence and respect rather than a formal institutional office.

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General Knowledge QUESTION #8627

Question 4938

Which Muslim scientist is credited with discovering sulfuric, nitric, and hydrochloric acids?

Muhammad Bin Zakaria Razi
Ibn al-Haytham
Avicenna (Bu Ali Sina)
Jabir Bin Hayyan✔️

Correct Answer Logic:

Jabir Bin Hayyan (Geber) is known for these discoveries.

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Statistics QUESTION #1992

Question 4939

For a symmetric distribution, Bowley's coefficient of skewness is 0 and Pearson's coefficient $\beta_1 = \dfrac{\mu_3^2}{\mu_2^3}$ equals:

$1$
$0$✔️
$-1$
$3$

Correct Answer Logic:

For a perfectly symmetric distribution, the third central moment $\mu_3 = 0$ (since positive and negative deviations cancel symmetrically). Therefore $\beta_1 = \dfrac{\mu_3^2}{\mu_2^3} = \dfrac{0}{\mu_2^3} = 0$. Note: $\beta_1 = 0$ indicates zero skewness.

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Physics QUESTION #7081

Question 4940

A pendulum clock loses $12\text{ s/day}$ at $40^{\circ}\text{C}$ and gains $4\text{ s/day}$ at $20^{\circ}\text{C}$. Find the temperature for correct time and the coefficient of linear expansion $\alpha$.

$60^{\circ}\text{C}$, $\alpha=1.85 \times 10^{-4}/^{\circ}\text{C}$
$30^{\circ}\text{C}$, $\alpha=1.85 \times 10^{-3}/^{\circ}\text{C}$
$55^{\circ}\text{C}$, $\alpha=1.85 \times 10^{-2}/^{\circ}\text{C}$
$25^{\circ}\text{C}$, $\alpha=1.85 \times 10^{-5}/^{\circ}\text{C}$✔️

Correct Answer Logic:

The change in time is given by $\Delta t = \frac{1}{2} \alpha \Delta \theta \times t$.

$12 = \frac{1}{2} \alpha (40 - \theta) \times 86400$
$-4 = \frac{1}{2} \alpha (20 - \theta) \times 86400$
Dividing the equations gives $\theta = 25^{\circ}\text{C}$.
Substituting $\theta$ back gives $\alpha = 1.85 \times 10^{-5}/^{\circ}\text{C}$.

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