Questions

Q:

According to WHO, the bird flu virus cannot be transmitted through food cooked beyond

A) 60 degrees celsius B) 70 degrees celsius
C) 90 degree celsius D) 100 degree celsius
 
Answer & Explanation Answer: B) 70 degrees celsius

Explanation:
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Filed Under: General Awareness

91 15715
Q:

The Rigvedic God Varuna was

A) Harbinger of peace B) Destoyer of foes
C) Guardian of the cosmic order D) God of prosperity
 
Answer & Explanation Answer: C) Guardian of the cosmic order

Explanation:
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Filed Under: Indian History

19 15697
Q:

First Indian woman to participate in Olympics?

A) Karnam Malleswari B) Mary Kom
C) P.V. Sindhu D) Geeta Phogat
 
Answer & Explanation Answer: A) Karnam Malleswari

Explanation:

The first Indian woman to ever win an Olympic medal was Karnam Malleswari who won a bronze medal at the Sydney Olympics in the Women's 69 kg category in Weightlifting.

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Filed Under: General Awareness
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24 15672
Q:

Define latency, transfer and seek time with respect to disk I/O.

Answer

Seek time is the time required to move the disk arm to the required track. Rotational delay or latency is the time it takes for the beginning of the required sector to reach the head. Sum of seek time (if any) and latency is the access time. Time taken to actually transfer a span of data is transfer time.

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Q:

Which of the following is not an Endocrine Gland?

A) Spleen B) Pituitary
C) Thyroid D) Adrenal
 
Answer & Explanation Answer: A) Spleen

Explanation:

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.

 

The major glands of the endocrine system include the

pineal gland,

pituitary gland,

pancreas,

ovaries,

testes,

thyroid gland,

parathyroid gland,

hypothalamus and

adrenal glands.

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Filed Under: Biology
Exam Prep: Bank Exams , AIEEE
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30 15666
Q:

Which of the statements given below are correct?

1. The author of the novel 'Atonement' is Ian McEwan.
2. The author of the novel 'The Sound and the Fury' is L. Ron Hubbard.
3. The author of the novel 'White Teeth' is Zadie Smith.

A) 1 and 2 B) 2 and 3
C) 1 and 3 D) 1, 2 and 3
 
Answer & Explanation Answer: C) 1 and 3

Explanation:
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Filed Under: Books and Authors
Exam Prep: Bank Exams

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Q:

Mirage is an example of

A) Reflection of light & Refraction of light B) Dispersion of light
C) Total Internal Reflection D) Refraction of light & Total Internal Reflection of light
 
Answer & Explanation Answer: D) Refraction of light & Total Internal Reflection of light

Explanation:

A Mirage is a naturally occurring optical phenomenon in which light rays bend to produce a displaced image of distant objects or the sky.




      • It is caused due to Total internal Reflection.

 

      • It is an optical illusion observed in deserts or hot summer days due to which a person sees a pond of water some distance ahead of him in which the surrounding objects appear inverted.

Mirage_is_an_example_of1556276063.jpg image


How Mirage Forms::

 

1. The temperature of other layers of atmosphere goes on decreasing as we go up.
2. Therefore density and refractive index of air changes as one goes up.
3. Thus a ray of light,gets refracted more and more away from the normal.
4. At a particular angle when a ray of light exceeds critical angle, total internal reflection takes place and ray of light gets reflected in the same medium.
5. when the reflected ray reaches our eye, it appears as coming from tree or sky .
6. Hence the inverted image of tree creates an impression from a pond of water.

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Filed Under: Physics
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49 15633
Q:

Which combination of atoms can form a polar covalent bond?

A) H and Br B) H and H
C) Na and Br D) N and N
 
Answer & Explanation Answer: A) H and Br

Explanation:

Only H and Br form Polar Covalent Bond.

 

Covalent bonding:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

1. Polar Covalent Bond

2. Nonpolar Covalent Bond

 

1. Polar Covalent Bond:

A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with. The atom with the higher electronegativity will have a stronger pull for electrons (Similiar to a Tug-O-War game, whoever is stronger usually wins). As a result, the shared electrons will be closer to the atom with the higher electronegativity, making it unequally shared.

 

2. Nonpolar Covalent Bond:

A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements. Nonpolar covalent bonds have a similar concept as polar covalent bonds; the atom with the higher electronegativity will draw away the electron from the weaker one.

 

Here H and H and N and N form Non-polar covalent bonds. Na and Br form the ionic bond.

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Filed Under: Chemistry
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