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Addition of HBr to 1-butyne ($CH\equiv C-CH_2CH_3$) follows Markovnikov's rule. First equivalent of HBr gives 2-bromobutene (vinyl bromide). With excess HBr, the second addition also follows Markovnikov's rule, adding to the more substituted carbon: the major product is 2,2-dibromobutane ($CH_3CBr_2CH_2CH_3$). Note: the paper lists option (C) as 2,2-Bromobutene which corresponds to 2,2-dibromobutane.

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Dairy Food Science and Technology QUESTION #5878

Question 3604

Bactofugation removes bacteria from milk using:

Microfiltration membranes
High-speed centrifugation exploiting density difference between bacteria $(\rho \approx 1.1\;\text{g/mL})$ and milk $(\rho \approx 1.032\;\text{g/mL})$✔️
UV irradiation
Chemical bacteriostats

Correct Answer Logic:

Bactofugation uses centrifugal separators rotating at $\approx 20{,}000$ rpm. Bacteria $(\rho \approx 1.1\;\text{g/mL})$ are denser than milk $(\rho \approx 1.032\;\text{g/mL})$ and are sedimented as a concentrate, reducing spore count by up to $99\%$.

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Academic/Professional (Social Sciences) QUESTION #6490

Question 3605

The 'Looking Glass Self' is a concept developed by which sociologist?

George Herbert Mead
Charles Horton Cooley✔️
Erving Goffman
Robert Merton

Correct Answer Logic:

Cooley proposed that our self-image is shaped by how we perceive others see us.

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General Knowledge QUESTION #8282

Question 3606

In MS Word 2013, what does the Quick Access Toolbar primarily allow a user to do?

Access common commands✔️
Insert graphics
Open recent documents
Manage files

Correct Answer Logic:

The Quick Access Toolbar provides one-click access to frequently used commands like Save and Undo.

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Boilers Mechanical Engineering QUESTION #4049

Question 3607

'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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General Knowledge QUESTION #828

Question 3608

testing mcqs single opt

Correct Answer Logic:

dsfasdfasd

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Information Technology QUESTION #1127

Question 3609

The process of deleting an element from an empty stack is called:

Overflow
Deletion
Underflow✔️
None of these

Correct Answer Logic:

Stack Underflow occurs when an attempt is made to pop (delete) an item from a stack that contains no elements.

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General Ability and Fire Fighting QUESTION #5629

Question 3610

A fire in a server room with live electrical equipment is classified as:

Class A
Class B
Class C✔️
Class D

Correct Answer Logic:

A server room fire involving live electrical equipment is a Class C fire. CO2 or dry chemical (non-conductive) extinguishers should be used.

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Math Physics Chemistry Biology QUESTION #7760

Question 3611

The hind leg bones found in whales are best described as:

Analogous to fish fins
Fossil structures from extinct ancestor
Homologous to bat wings
Vestigial structures✔️

Correct Answer Logic:

Vestigial structures are remnants of organs that had a function in ancestors but are reduced/non-functional in current species. Whale hind limb bones indicate evolution from four-legged land mammals.

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Dairy Food Science and Technology QUESTION #5968

Question 3612

The 'tempering' cream before butter making promotes:

Rapid melting of all fat crystals for uniform consistency
Partial crystallization of fat into stable polymorphic forms ($\beta'$) facilitating efficient churning and good butter texture✔️
Complete solidification of all fat preventing overworking
Formation of large unstable $\alpha$-form crystals that improve spreadability

Correct Answer Logic:

Cream tempering temperature cycling (e.g. cooling to $8^{\circ}\text{C}$ then warming to $20^{\circ}\text{C}$ then re-cooling to $13^{\circ}\text{C}$) promotes $\beta'$ polymorphic crystal forms of milk fat triglycerides. With $\approx 50\%$ crystalline fat, cream churns most efficiently.

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Physics QUESTION #7100

Question 3613

If a human grows into a giant such that all linear dimensions increase by a factor of $9$ while density remains the same, by what factor does the stress in the leg change? [cite: 457]

$\frac{1}{81}$
9✔️
$\frac{1}{9}$
81

Correct Answer Logic:

Stress is defined as $\frac{\text{Force}}{\text{Area}}$ [cite: 457].

Force (Weight) $W \propto \text{Volume} \times \text{density} \propto L^3$
Area $A \propto L^2$
$\text{Stress} \propto \frac{L^3}{L^2} \propto L$
Since $L$ increases by $9$, the stress increases by a factor of $9$[cite: 457].

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Academic/Professional (Social Sciences) QUESTION #10128

Question 3614

Rawls's 'veil of ignorance' is a device meant to ensure that principles of justice are chosen:

With full knowledge of one's own social position
Without knowledge of one's own place in society✔️
By elected representatives only
Based on majority vote alone

Correct Answer Logic:

The veil of ignorance ensures impartiality by hiding personal circumstances from those choosing justice principles.

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Dairy Food Science and Technology QUESTION #5943

Question 3615

The smoke point of ghee compared to butter is higher because:

Ghee has a lower smoke point because it contains more free fatty acids
Ghee has a much higher smoke point ($\approx 232^{\circ}\text{C}$) than butter ($\approx 163^{\circ}\text{C}$) because virtually all water and MSNF have been removed✔️
Both have identical smoke points of $180^{\circ}\text{C}$
Butter has a higher smoke point due to its water content acting as a coolant

Correct Answer Logic:

Ghee (anhydrous milk fat, $>99.5\%$ fat) has a smoke point of $\approx 232^{\circ}\text{C}$ vs butter ($\approx 163^{\circ}\text{C}$). The low smoke point of butter is due to proteins and lactose (MSNF) that burn at lower temperatures.

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Quantitative Reasoning QUESTION #8032

Question 3616

FRAGILE : BREAK :: (Find the pair that best matches the relationship between the given words)

invisible : see
erratic : control
flammable : burn✔️
noxious : escape

Correct Answer Logic:

FRAGILE means easily broken — it describes a tendency toward BREAK. Similarly, flammable means easily burned — it describes a tendency toward BURN. Both pairs follow the pattern: [adjective meaning 'prone to X'] : [the action X]. 'Invisible:see' is opposite (invisible means cannot be seen). 'Erratic:control' and 'noxious:escape' don't share this structural relationship.

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Academic/Professional (Social Sciences) QUESTION #10085

Question 3617

Informal mechanisms of social control primarily operate through:

Legal codification
Socialization and community norms✔️
Judicial punishment
Police enforcement

Correct Answer Logic:

Informal control relies on norms, customs, and socialization rather than codified law.

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Dairy Food Science and Technology QUESTION #5998

Question 3618

In dairy plant design, 'zoning' of a dairy processing facility correctly describes:

Placing all refrigeration units in one zone
Separating the facility into distinct areas (raw milk zone, processing zone, pasteurized product zone, packaging zone) with controlled access, airflow, and dedicated equipment/personnel to prevent cross-contamination✔️
Designing all processing equipment in a linear flow
Locating all CIP systems in the highest-risk zone

Correct Answer Logic:

Hygienic zoning in dairy plants separates: (1) Raw material/dirty areas (raw milk reception); (2) Processing/intermediate risk (pasteurization, separation); (3) Pasteurized/clean areas (filling, packaging); (4) High-care/clean rooms. Each zone has controlled access, appropriate hygiene level (GMP, HACCP), unidirectional flow of product/personnel/air, and distinct waste management.

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