Reading Mode - Questions

A basis for $\mathbb{R}^3$ must have exactly 3 linearly independent vectors. Option (A): only 2 vectors. Option (B): $(2,4,6)=2(1,2,3)$ — dependent. Option (C): the standard basis — 3 independent vectors ✓. Option (D): all three are scalar multiples of $(1,1,1)$ — dependent.

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Accounting & Finance QUESTION #9640

Question 25

In the Debtors Account under the Single Entry conversion, if Opening Debtors = Rs. 12,000; Credit Sales = Rs. 55,000; Cash Received from Debtors = Rs. 45,000; Discount Allowed = Rs. 3,000; Bad Debts = Rs. 1,500; what is the Closing Debtors balance?

Rs. 17,500✔️
Rs. 19,000
Rs. 16,000
Rs. 21,000

Correct Answer Logic:

Closing Debtors = Opening Debtors + Credit Sales – Cash Received – Discount Allowed – Bad Debts = 12,000 + 55,000 – 45,000 – 3,000 – 1,500 = Rs. 17,500.

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Ability / HR / Governance / Special Education QUESTION #1807

Question 26

Rule 28(1) requires that bids be opened at a minimum of how many minutes after the deadline for submission of bids?

Fifteen minutes
Thirty minutes✔️
Forty-five minutes
Sixty minutes

Correct Answer Logic:

Rule 28(1) clearly states that bids shall be opened at the time specified in the bidding documents and shall be opened at least thirty minutes after the deadline for the submission of bids, to allow for any last-minute submissions to be received.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3009

Question 27

Which of the following is a 'Flocculating Agent' used in suspensions?

Electrolytes
Surfactants
Polymers
All of these✔️

Correct Answer Logic:

Electrolytes, surfactants, and polymers can all be used to form 'flocs' to improve suspension stability.

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Mathematics QUESTION #6044

Question 28

Let $O$ be the vertex and $Q$ any point on the parabola $x^2=8y$. If point $P$ divides segment $OQ$ internally in the ratio $1:3$, find the locus of $P$.

$x^2=y$
$y^2=x$
$y^2=2x$
$x^2=2y$✔️

Correct Answer Logic:

Let $Q=(4t, 2t^2)$ be a point on $x^2=8y$ (using parametrization $x=4t, y=2t^2$). $O=(0,0)$.

$P$ divides $OQ$ in ratio $1:3$: $P=\left(\frac{1\cdot4t+3\cdot0}{4},\frac{1\cdot2t^2+3\cdot0}{4}\right)=\left(t,\frac{t^2}{2}\right)$

Let $P=(h,k)$: $h=t$ and $k=\frac{t^2}{2}=\frac{h^2}{2}$

So $h^2=2k$, i.e., the locus is $x^2=2y$.

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General Knowledge QUESTION #8744

Question 29

Which discovery in 1928 brought a great revolution in medical history?

Vitamin C
Aspirin
Penicillin✔️
None above

Correct Answer Logic:

Alexander Fleming discovered penicillin in 1928.

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General Knowledge QUESTION #4705

Question 30

Which organization is considered the world's oldest international human rights body?

Amnesty International
Freedom House
Anti-Slavery International✔️
Human Rights Watch

Correct Answer Logic:

Anti-Slavery International, founded in 1839, is the world's oldest international human rights organization, predating Amnesty International (1961) and Freedom House (1941).

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General Abilities QUESTION #4540

Question 31

What is $\frac{3}{4} + \frac{1}{4}$?

$\frac{4}{8}$
$1$
$\frac{4}{4}$
Both B and C✔️

Correct Answer Logic:

$\frac{3}{4} + \frac{1}{4} = \frac{3+1}{4} = \frac{4}{4} = 1$. Both options B and C are correct.

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Chemistry QUESTION #7150

Question 32

Identify the amphoteric hydroxide among the following group 2 elements.

$Be(OH)_{2}$✔️
$Ca(OH)_{2}$
$Mg(OH)_{2}$
$Sr(OH)_{2}$

Correct Answer Logic:

Most group 2 hydroxides are basic and their basicity increases down the group. However, Beryllium ($Be$) is the first element and shows diagonal relationship with Aluminum. Due to its small size and high electronegativity, $Be(OH)_{2}$ is amphoteric, meaning it reacts with both acids and strong bases.

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Physics QUESTION #7868

Question 33

Speed of sound in ideal gas does NOT depend on:

Density
Moisture
Pressure✔️
Temperature

Correct Answer Logic:

For ideal gas, v = √(γRT/M). Pressure has no effect at constant temperature; moisture slightly affects density but the question says ideal gas: strictly, pressure independent.

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Nursing QUESTION #9214

Question 34

A researcher calculates Cronbach's Alpha ($\alpha = 0.87$) for a 20-item nursing satisfaction questionnaire. What does this indicate?

The tool has poor internal consistency and needs revision
The tool has excellent validity and measures what it intends to
The tool has good internal consistency reliability✔️
The tool is valid only for populations with similar cultural backgrounds

Correct Answer Logic:

Correct Answer: C — Good internal consistency reliability

Cronbach's Alpha ($\alpha$) measures the internal consistency of a multi-item scale — the degree to which items within the scale measure the same construct.

Interpretation benchmarks:

Cronbach's $\alpha$	Internal Consistency
$\alpha \geq 0.90$	Excellent
$0.80 \leq \alpha < 0.90$	Good
$0.70 \leq \alpha < 0.80$	Acceptable
$0.60 \leq \alpha < 0.70$	Questionable
$\alpha < 0.60$	Poor — tool needs revision

$\alpha = 0.87$ falls in the 'Good' range, meaning the 20 items are cohesively measuring the same concept. Cronbach's Alpha measures reliability, not validity — a distinction critical for Head Nurse research appraisal.

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Mathematics QUESTION #6972

Question 35

Let $I_n=\displaystyle\int\tan^n x\,dx$ for $n>1$. If $I_4+I_6 = a\tan^5x + bx^5 + C$, find the ordered pair $(a,b)$.

$\left(-\dfrac{1}{5},1\right)$
$\left(\dfrac{1}{5},0\right)$✔️
$\left(\dfrac{1}{5},-1\right)$
$\left(-\dfrac{1}{5},0\right)$

Correct Answer Logic:

Use the reduction: $I_n+I_{n-2}=\displaystyle\int\tan^{n-2}x\cdot\tan^2x\,dx+\int\tan^{n-2}x\,dx=\int\tan^{n-2}x\sec^2x\,dx=\dfrac{\tan^{n-1}x}{n-1}+C$

$I_4+I_6$: set $n=5$: $I_4+I_6=\dfrac{\tan^5x}{5}+C$

Comparing with $a\tan^5x+bx^5+C$: $a=\dfrac{1}{5}$, $b=0$.

$(a,b) = \left(\dfrac{1}{5},0\right)$

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Reading and Writing (Module-1) QUESTION #5447

Question 36

Ming Tang's 2019 study explains Earth's arcs, ridges that form when an oceanic plate subducts under a continental plate, melts, rises, and bursts through the ____

continents geological
continents: geological✔️
continents: geological
continents. Geological

Correct Answer Logic:

A colon introduces an appositive or clarification; here it separates "continental crust" from "geological structures" though the original text has no punctuation. Given options, colon is least incorrect.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3396

Question 37

The 'Optimal $pH$' for the stomach enzyme Pepsin is approximately:

$2.0$ (Acidic)✔️
$7.0$ (Neutral)
$8.5$ (Alkaline)
$14.0$ (Strongly Basic)

Correct Answer Logic:

Pepsin is highly active in the acidic environment of gastric juice.

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General Abilities QUESTION #4536

Question 38

Simplify: $\sqrt{18}$

$3\sqrt{2}$✔️
$2\sqrt{3}$
$9\sqrt{2}$
$6\sqrt{3}$

Correct Answer Logic:

$\sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2}$

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Geography QUESTION #1246

Question 39

Convection currents are found in:

Troposphere✔️
Stratosphere
Ionosphere
None of these

Correct Answer Logic:

Convection currents in the atmosphere occur primarily in the troposphere — the lowest layer of the atmosphere (0–12 km). The troposphere is heated from below by the Earth's surface, making it thermally unstable and prone to convective overturning (warm air rises, cool air sinks). The stratosphere is thermally stable (temperature increases with altitude), suppressing convection.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2987

Question 40

How much $95\%$ alcohol is needed to prepare $500\text{ ml}$ of $70\%$ alcohol?

$368.4\text{ ml}$✔️
$350\text{ ml}$
$420.5\text{ ml}$
$300.0\text{ ml}$

Correct Answer Logic:

Using $C_1V_1 = C_2V_2$: $95 \times V_1 = 70 \times 500 \implies V_1 = 35000 / 95 \approx 368.4\text{ ml}$.

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More Options

Suggest a Question

Cronbach's \(\alpha\)	Internal Consistency
\(\alpha \geq 0.90\)	Excellent
\(0.80 \leq \alpha < 0.90\)	Good
\(0.70 \leq \alpha < 0.80\)	Acceptable
\(0.60 \leq \alpha < 0.70\)	Questionable
\(\alpha < 0.60\)	Poor — tool needs revision