Questions

Q:

Unsolicited e-mail is called a ______

A) Newsgroup B) Usenet
C) Backbane D) Spam
 
Answer & Explanation Answer: D) Spam

Explanation:
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Filed Under: Computer
Exam Prep: Bank Exams

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Q:

Jatakas are the stories of

A) Buddha's life B) Buddha's previous lives
C) The lives of the future Buddhas D) Great saints of Buddhism
 
Answer & Explanation Answer: B) Buddha's previous lives

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Filed Under: Indian History

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Q:

Myeloid stem cells give rise to all leukocytes.

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

Explanation:

Hemopoiesis begins in the red bone marrow, with hemopoietic stem cells that differentiate into myeloid and lymphoid lineages.


 


Myeloid stem cells give rise to all the other formed elements, including the erythrocytes; megakaryocytes that produce platelets; and a myeloblast lineage that gives rise to monocytes and three forms of granular leukocytes: neutrophils, eosinophils, and basophils.

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Subject: Biology
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

What is the oxidation number of carbon in NaHCO3?

A) -4 B) -3
C) +4 D) +2
 
Answer & Explanation Answer: C) +4

Explanation:

The given compound is NaHCO3 Sodium bicarbonate which is commonly known as Baking soda.

Oxidation numbers are the charges on ions. When a neutral atom loses electrons it becomes positively charged. When a neutral atom gains electrons it becomes negatively charged.

 

Here the C represents the oxidation state of carbon in this compound. Compounds are electrically neutral, which is why we set the sum of the oxidation states equal to zero.

Sodium has a +1 oxidation state. Hydrogen has a +1 oxidation state. Oxygen has a -2 oxidation state. There are three oxygen atoms, which means the total oxidation state provided by both oxygen ions is -6. Adding up these oxidation states we get:

1 + 1 + (-6) + C = 0

-4 + C = 0

=> C = 4


This means the oxidation state of carbon in this compound is +4.

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Filed Under: Chemistry
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Q:

The central Scientific Instruments Organisation is situated at  

A) Chennai B) Bangalore
C) Chandigarh D) New Delhi
 
Answer & Explanation Answer: C) Chandigarh

Explanation:
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Filed Under: Famous Places

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Q:

A convex mirror is used to form an image of a real object. The image

A) is diminished in size B) is erect
C) always lies between the pole and the focus D) all of the above
 
Answer & Explanation Answer: D) all of the above

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Filed Under: Physics

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Q:

Which one of the following is not a true snake ?

A) Blind snake B) Glass snake
C) Sea snake D) Tree snake
 
Answer & Explanation Answer: B) Glass snake

Explanation:

Glass snake is a lizard.

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Filed Under: Animals and Birds
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Q:

Giant Leatherback turtle nests in which location in India?

 

A) Andaman & Nicobar B) West Bengal
C) Goa D) Odisha
 
Answer & Explanation Answer: A) Andaman & Nicobar

Explanation:
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Filed Under: General Awareness
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