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General Knowledge QUESTION #2622

Which of the following CORRECTLY describes the difference between HDMI and DVI cables?

HDMI outputs only video while DVI outputs both video and audio
HDMI outputs both video and audio while DVI generally outputs video only✔️
Both HDMI and DVI output only video without any audio
Both HDMI and DVI output both audio and video identically

Correct Answer Logic:

HDMI (High Definition Multimedia Interface) outputs BOTH video and audio through a single cable. DVI (Digital Visual Interface) cables generally output VIDEO ONLY. This makes HDMI more practical for connecting computers to monitors and TVs with speakers.

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Computer Science QUESTION #1148

Question 762

A 256×256 image with 32 gray levels requires how many bits per pixel?

8 bits
5 bits✔️
6 bits
10 bits

Correct Answer Logic:

The number of bits n required for L gray levels is calculated as 2n=L. Since 25=32, each pixel requires 5 bits.

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Islamic Studies QUESTION #231

Question 763

Hudaybiyyah peace document was written from the Muslims' side by:

Abu Bakar Siddiq
Zaid bin Thabit
Ali bin Abi Talib✔️
None of these

Correct Answer Logic:

Hazrat Ali (RA) served as the scribe for the Treaty of Hudaybiyyah.

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Electrical Engineering QUESTION #2151

Question 764

The Skin Effect in a conductor is more prominent at:

DC (Zero frequency)
Low frequencies
High frequencies✔️
All frequencies equally

Correct Answer Logic:

Skin effect, where current density is highest near the surface, increases as the frequency $f$ increases due to the decrease in skin depth $\delta = \sqrt{\frac{2}{\omega\mu\sigma}}$.

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Biology QUESTION #4231

Question 765

CFTR gene that encode a protein which regulate:

Protein and salt
Salt and Water✔️
Sugar and Water
Liquid and Protein

Correct Answer Logic:

CFTR regulates salt and water transport.

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Biology QUESTION #4283

Question 766

The most primitive respiratory process occurring in a living cell is:

Lactic acid fermentation
Alcoholic fermentation
Glycolysis✔️
Krebs's cycle

Correct Answer Logic:

Glycolysis is the most ancient and primitive form of cellular respiration, occurring in the cytoplasm without oxygen. It is universal among all living organisms.

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Chemistry QUESTION #1068

Question 767

The correct order of decreasing acidity of the following aliphatic acids is:

HCOOH $>$ CH$_3$COOH $>$ (CH$_3)_2$CHCOOH $>$ (CH$_3)_3$CCOOH✔️
HCOOH $>$ (CH$_3)_3$CCOOH $>$ (CH$_3)_2$CHCOOH $>$ CH$_3$COOH
(CH$_3)_3$CCOOH $>$ (CH$_3)_2$CHCOOH $>$ CH$_3$COOH $>$ HCOOH
CH$_3$COOH $>$ (CH$_3)_2$CHCOOH $>$ (CH$_3)_3$CCOOH $>$ HCOOH

Correct Answer Logic:

Acidity of carboxylic acids decreases as alkyl group size increases due to +I (electron-donating inductive) effect destabilizing the carboxylate anion. HCOOH has no alkyl group (most acidic), then CH$_3$COOH, then (CH$_3)_2$CHCOOH, then (CH$_3)_3$CCOOH (least acidic). Order: HCOOH $>$ CH$_3$COOH $>$ (CH$_3)_2$CHCOOH $>$ (CH$_3)_3$CCOOH.

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Chemistry QUESTION #1432

Question 768

Potentiometric titration involves measurement of:

Current in the reaction
Volume at equivalence
Electrode potential as a function of titrant added✔️
None of these

Correct Answer Logic:

Potentiometric titration involves monitoring the electrode potential (voltage) of the solution as a function of the volume of titrant added. The equivalence point is identified by a sharp change (inflection point) in the potential-volume curve. It uses a reference electrode and an indicator electrode immersed in the analyte solution, and is particularly useful for coloured or turbid solutions.

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Math Physics Chemistry Biology QUESTION #797

Question 769

Which of the following is the formula of methylene chloride?

$\text{CH}_2\text{Cl}_2$✔️
$\text{CHCl}_3$
$\text{CH}_3\text{Cl}$
$\text{CCl}_4$

Correct Answer Logic:

Methylene chloride (dichloromethane) has the formula $\text{CH}_2\text{Cl}_2$. $\text{CHCl}_3$ is chloroform and $\text{CCl}_4$ is carbon tetrachloride.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3587

Question 770

The 'Taxonomical' classification of drugs is based on:

Natural relationship and phylogeny✔️
Alphabetical order
Healing properties
Physical appearance

Correct Answer Logic:

Taxonomical classification follows the biological hierarchy (Family, Genus, Species).

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English QUESTION #2733

Question 771

Which sentence is in the PASSIVE VOICE?

She cleaned the room.
He is writing a letter.
The book was written by him.✔️
They will finish the work.

Correct Answer Logic:

Passive voice uses 'be + past participle'. 'The book was written by him' has 'was written' (was + past participle)

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Boilers Mechanical Engineering QUESTION #4049

Question 772

'Dryness Fraction' of steam is measured using a:

Thermometer
Calorimeter✔️
Pressure Gauge
Hydrometer

Correct Answer Logic:

Separating or Throttling calorimeters are used for this.

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Basic Mathematics QUESTION #2820

Question 773

If $a : b = 3 : 4$ and $b : c = 6 : 7$, find $a : b : c$.

9:12:14✔️
3:04:07
6:08:07
3:06:07

Correct Answer Logic:

$a:b = 3:4$ and $b:c = 6:7$. Make $b$ common: $b = \text{LCM}(4,6) = 12$. $a:b = 9:12$ and $b:c = 12:14$. So $a:b:c = 9:12:14$.

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Islamic Studies QUESTION #214

Question 774

Which leader is known for strategic brilliance at the Battle of Yarmouk?

Ali ibn Abi Talib
Abu Ubaidah
Sa'd ibn Abi Waqqas
Khalid ibn al-Walid✔️

Correct Answer Logic:

Khalid ibn al-Walid's tactics were decisive in the defeat of the Byzantine forces.

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Boilers Mechanical Engineering QUESTION #4077

Question 775

'Phosphate Treatment' in a boiler helps to:

Make the water blue
Keep scale-forming minerals in a soft, non-adherent 'sludge' form✔️
Increase the pressure
Clean the exterior

Correct Answer Logic:

The sludge is then removed via the blow-down.

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Urdu QUESTION #5229

Question 776

'A man is known by the company he keeps' کے درست مطلب کا انتخاب کیجیے۔

آدمی اپنے دوستوں سے پہچانا جاتا ہے✔️
آدمی اپنے ماحول سے پہچانا جاتا ہے
آدمی اپنے کاروبار سے جانا جاتا ہے
آدمی اپنے کام سے جانا جاتا ہے

Correct Answer Logic:

A man is known by the company he keeps کا درست مطلب ہے: آدمی اپنے دوستوں سے پہچانا جاتا ہے۔

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Agronomy QUESTION #2015

Question 777

Agronomy is best defined as the branch of agricultural science that deals with:

The breeding and genetics of field crops only
The theory and practice of field crop production and soil management in relation to crop improvement✔️
The study of horticultural crops and their post-harvest management
The classification and taxonomy of cultivated plants

Correct Answer Logic:

Agronomy integrates both crop science and soil science to study the theory and practice of producing field crops. It encompasses soil management, tillage, nutrient management, irrigation, and crop protection — all aimed at maximizing yield and land use efficiency.

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Chemistry QUESTION #4374

Question 778

Correct arrangement of orbital according to size of hybridized orbitals:

$sp > sp^2 > sp^3$
$sp^3 > sp > sp^2$
$sp^2 > sp > sp^3$
$sp^3 > sp^2 > sp$✔️

Correct Answer Logic:

The size of hybridized orbitals increases with increasing $sp^3$ character: $sp^3 > sp^2 > sp$. This is because more p-character means more diffuse, larger orbitals, and $sp^3$ has the most p-character (75%).

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Professional QUESTION #1930

Question 779

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?

The Cabinet Secretary
The Prime Minister
The Secretary of the Division concerned who also informs the Cabinet Division of his decision✔️
The Minister-in-Charge

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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GATE Aerospace Engineering (AE) QUESTION #3774

Question 780 (Select all that apply)

Which of the following properties are characteristic of a real $n \times n$ matrix $A$?

If $A$ is symmetric, its eigenvalues are real.✔️
If $A$ is orthogonal, its determinant is $\pm 1$.✔️
If $A$ is skew-symmetric, its diagonal elements are zero.✔️
If $A$ is singular, its determinant is zero.✔️

Correct Answer Logic:

All listed options are standard properties of these specific matrix types.

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