Questions

Q:

What types of orbital overlap occur in Cumulene?

Answer

A cumulene is a hydrocarbon with three or more cumulative double bonds. They are analogous to allenes, only having a more extensive chain. The simplest molecule in this class is butatriene, which is also called simply cumulene.


 


The carbons on the ends are sp² hybridized, with a p-orbital for the 'second' bond in the double bond with their neighboring carbons.


They have those sp² orbitals overlapping with the s from the hydrogen, and they have a p overlapping in the pi bond with the neighboring carbon. They also have a sigma bond with the neighboring carbon I'll get to.


The middle carbons each have two pi bonds with their neighbors, leaving sp hybridiaztion for the rest. So they have sp/sp² with the end carbons, and sp/sp with each other. (And they also have p/p in the pi bonds).


 


All orbital overlappings in Cumuene are :


* s/sp²


* p/p


* sp/sp²


* sp/sp

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Q:

Which of these cities has one part of it is in Asia and other part in Europe ?

A) Moscow B) London
C) Istanbul D) Saint Peteresburg
 
Answer & Explanation Answer: C) Istanbul

Explanation:
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Q:

Exercise is a subset of physical activity that is

A) Repetative B) Planned
C) Structured D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Exercise is a subset of physical activity that is planned, structured and repetative.

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Q:

Multiple users can share a local temporary table

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Multiple users can't share a local temporary table

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Q:

The State which tops in the production of rubber is 

A) Tamil Nadu B) Karnataka
C) Kerala D) Orissa
 
Answer & Explanation Answer: C) Kerala

Explanation:

A uniformly high temperature of 800F and the annual rainfall of 80 inches or more, required by rubber is available in Kerala.

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Q:

What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?

A) 18 km/sec B) 11.2 km/sec
C) 21 km/sec D) 35 km/sec
 
Answer & Explanation Answer: B) 11.2 km/sec

Explanation:

This 11.2 km/s is also known as the escape velocity. It works out to roughly 25000miles per hour 

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Filed Under: Physics

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Q:

Which of the following is not an intensive property?

A) Weight B) Density
C) Refractive index D) Melting point
 
Answer & Explanation Answer: A) Weight

Explanation:

An intensive property is a physical quantity whose value does not depend on the amount of the substance for which it is measured. For example, the temperature of a system in thermal equilibrium is the same as the temperature of any part of it. If the system is divided the temperature of each subsystem is identical. The same applies to the density of a homogeneous system, if the system is divided in half, the mass and the volume change in the identical ratio and the density remains unchanged. Additionally, the boiling point of a substance is another example of an intensive property. For example, the boiling point for water is 100 °C at a pressure of one atmosphere, a fact which remains true regardless of quantity.

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Q:

A computer program consists of

A) flowchart B) algorithm
C) logical steps D) All of the above
 
Answer & Explanation Answer: B) algorithm

Explanation:

A computer program is a set of instructions i.e algorithm that are to be executed to complete a task.

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