Questions

Q:

How does molecular shape affect polarity?

Answer

Polarity :: 


The polarity of a molecule defines its other physical properties such as melting point, boiling point, surface tension, vapor pressure etc... Simply, polarity occurs when the electron distribution in a molecule is asymmetric. This results in a net dipole moment in the molecule. One end of the molecule is charged negative while the other gets a positive charge.


 


The polarization of a molecule greatly depends on the shape of the molecule. A diatomic molecule like HF mentioned above has no issue of shape. The net dipole moment is only due to the uneven distribution of electrons between the two atoms. However, when there are more than two atoms involved in making a bond, there are many complexities.


 


The water molecule is of bent shape. Therefore, when the two pair of electrons shared by oxygen with two hydrogen atoms is pulled towards oxygen, the net dipole moment results in the direction of the oxygen atom. There is no other force to cancel out the resultant dipole moment. Hence, the water molecule is highly polar.


 


Ammonia molecule is of a pyramid shape and the electronegative N atom pulls the electrons towards itself. The three N-H bonds are not in the same plane; hence the dipole moments created do not get canceled out. This makes ammonia a polar molecule.


 


However, the dipole moments sometimes get canceled due to the shape of the molecules, making the molecule non-polar. Carbon dioxide is such a molecule.

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Q:

Which works are protected by copyright?

A) Ideas B) Architectural works
C) Procedures D) Names
 
Answer & Explanation Answer: B) Architectural works

Explanation:

 

 Copyright law safeguards the expression of thoughts and facts, not simply the thoughts and actualities. Thoughts are fair diversion for everybody to express in their own words.

 

Works that are protected by copyright are ::

 

Literary works,

 

Musical works, including any accompanying words

 

Dramatic works, including any accompanying music

 

Pantomimes and choreographic works

 

Pictorial, graphic, and sculptural works

 

Motion pictures and other audiovisual works

 

Sound recordings

 

Architectural works.

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Q:

Lacto-ovo vegetarians would not eat

A) Fish and egg B) Egg, meat and milk products
C) Meat, poultry, milk products D) Meat, poultry, fish
 
Answer & Explanation Answer: D) Meat, poultry, fish

Explanation:

Lacto-ovo vegetarians who eat milk products and eggs but would not eat Meat, poultry, fish.

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Q:

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

 

Most successful companies, institutions and organizations have mission statements. Most individuals don't. As the Chief Executive Officer of your own life in the knowledge era, you need a laser like focus in your vision. You need a mission and a mission statement describing how you want to live, not just what you want to own; defining the person you want to become, not just the title you want to see on your door; outlining the knowledge you will receive, not just the degree you'll earn or your next promotion.

I began the process this way : "To be aware of the uniqueness of my associates, clients, friends and family, and to treat that uniqueness with loving concern. I was created to lead myself and others to understand win­win relationships and how to use them to improve the lives of all persons with whom I come into contact."

You, too, can frame your mission statement starting with your core values, working outward to your material desires and financial needs.

What are the suggested components of a 'mission statement'?

A) Win­win attitude, financial needs, knowledge B) Core­values, material desires, financial needs
C) Academic qualifications, love, material desires D) Core­values, joy, self­ confidence
 
Answer & Explanation Answer: B) Core­values, material desires, financial needs

Explanation:
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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.


Modern civilization is completely dependent on energy, which has therefore to be abundant and also economical. About 85% of the world's energy is supplied by oil, coal and natural gas while nuclear, hydro, wind and solar power and biomass supply the rest. Coal, nuclear and hydro are used primarily to generate electricity while natural gas is widely used for heating. Biomass is used both for heating and cooking. The wind and solar power is the future's hope as they are sustainable energy sources. Oil powers almost all machines that move and that makes oil uniquely versatile. Oil powered airplanes carry 500 people across the widest oceans at nearly the speed of sound. Oil powered machines produce and transport food. Oil powered machines are ubiquitous. Clearly, we live in the age of oil but it is drawing to a close. According to data available if oil production remains constant until it's gone, there is enough to last 42 years. Oil wells will produce less as they become depleted, which will make it impossible to keep production constant. Similarly natural gas and coal will last another 61 years and 133 years respectively. Naturally, as they become scarce, they become expensive, leading to a worldwide energy crisis. If we are to survive on this planet, we have to make a transition to sustainable energy sources. The transition may be willy-nilly or planned - the choice is ours.

The dawning era of limited and expensive energy will be very difficult for everyone on earth but will be even more difficult if it is not anticipated. It is of utmost importance that the public and policymakers understand the global energy crisis and act in tandem to ensure that the species 'homo sapiens' does not become extinct.

The theme of the passage is

A) Changing Lives B) Looming Energy Crisis
C) Energy Resources D) Power in Today's world
 
Answer & Explanation Answer: B) Looming Energy Crisis

Explanation:
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Q:

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

But this does not mean

X-phenomena to the body
Y-is a meaningless expression
Z-that the reference of mental

A) YZX B) ZXY
C) YXZ D) XZY
 
Answer & Explanation Answer: B) ZXY

Explanation:
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Q:

Which of the following river flows in hyderabad ?

A) Krishna B) Godavari
C) Kaveri D) Musi
 
Answer & Explanation Answer: D) Musi

Explanation:

Musi River or Musinuru is a tributary of the Krishna River in the Deccan Plateau flowing through Telangana state in India. Hyderabad stands on the banks of Musi river, Which divides the historic old city and the new city.

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Q:

The light reactions of photosynthesis supply the calvin cycle with

A) CO2and ATP B) ATP and NADPH
C) light energy D) H2O and NADPH
 
Answer & Explanation Answer: B) ATP and NADPH

Explanation:

The light reactions of photosynthesis supply the calvin cycle with ATP and NADPH.

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