Questions

Q:

Dry ice is an example of which process

A) Condensation B) Evaporation
C) Sublimation D) Freezing
 
Answer & Explanation Answer: C) Sublimation

Explanation:

Sublimation is a process when a solid changes directly into gas instead changing into liquid first. Dry ice is an example of Sublimation process because it doesn't change into liquid CO2 and directly change into gaseous CO2 when heated.

 

Hence, Dry ice is an example of Sublimation process. 

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Q:

The velocity required to place a vehicle in orbit round the moon is _______ that required to place it in orbit round the earth 

A) less than B) Greater than
C) equal to D) greater than or equal to
 
Answer & Explanation Answer: A) less than

Explanation:

This orbital velocity at the moon is less because orbital velocity = rg

 

where 'r ' is the orbital radius. i.e the distance of the body from the center of the earth and 'g' is the acceleration due to gravity on the body in question. In the case of the moon, both r and g are less than in the case of the earth.

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Q:

The soaps used in shaving cream are 

A) Calcium soaps B) lead soaps
C) soft soaps D) hard soaps
 
Answer & Explanation Answer: C) soft soaps

Explanation:
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Q:

Which statement best describes an igneous intrusion?

A) Igneous intrusion for when ice crystals splash into lava B) Magma is injected into surrounding rock forming an igneous intrusive
C) Magma is exported to an open area and forms iron D) Magma explodes to the surface and forms a smooth outer layer of rock
 
Answer & Explanation Answer: B) Magma is injected into surrounding rock forming an igneous intrusive

Explanation:

Magma is injected into surrounding rock forming an igneous intrusive.

 

Actually it is a plutonic formation in which magma present beneath Earth surface deforms the shape of rocks present above it
 

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Q:

Projects come in all sizes and shapes. Many times, project managers must daw from their "toolbox" of processes, tools, or methodologies. How many knowledge areas are described in the Project Management Body of Knowledge ? 

A) 2 - core processes and facilitating processes B) 9
C) 5 - initiation, planning,execution,control, and closing D) 39
 
Answer & Explanation Answer: B) 9

Explanation:

Answer A is incorrect because it pertains to the processes. Answer C is incorrect because these are the five phases of a project. Answer D is incorrect because there are 39 processes, not knowledge areas.

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Q:

Under what section of trade union act, workers are entitled to protection if strike is illegal?

Answer

Dispute Act, 1947 put certain prohibitions on the right to strike. A strike may be illegal if it contravenes the provision of section 22, 23 or 24 of the Act.

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Q:

Which of these is Not a Carcinogen?

A) Cadmium B) Asbestos
C) Benzene D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Asbestos can cause

    •  Lungs
    • Gastrointestinal tract  types of Cancer.

Benzene can cause

    • Leukemia
    • Hodgkin's lymphoma types of Cancer.

Cadmium can cause

    • Prostate type of Cancer.
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Q:

Order of basicity of amines

Answer

The order of basicity for primary, secondary and tertiary amines are:


Secondary > Primary > Tertiary > NH3


 


* Amines are basic in nature as they have lone pair of electrons on nitrogen. Therefore, they have a strong tendency to donate this lone pair of electrons to electron acceptors.


* The stability of conjugate acids formed is dependent on the extent of H-bonding,and greater the number of H-atoms on N more stable is the conjugate acid.


* The conjugate acid of primary amine is the most stable with greater number (3) of H-bonds than > Secondary > tertiary. But primary amines are less basic than secondary as the electron density on the N atom is less and lone pair of electrons are not readily available for protonation.


* The two opposing factors i.e. the stability of conjugate acids formed and ease of availability of electrons for Protonation, balance each other in case of secondary amines and it is most basic.

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