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Q:

A balloon filled with hydrogen will

A) continue going upwards uninterrupted B) reach a particular height and remain floating
C) burst after reaching some height D) reach a particular height and start coming down
 
Answer & Explanation Answer: B) reach a particular height and remain floating

Explanation:

It will stop at a height where the weight of the balloon with contents is equal to the weight of air displaced by it, i.e , when the upthrust is equal to the downthrust. The question of bursting will depend on how much difference of pressure inside and outside , the material of the balloon can withstand. It is assumed the balloon is filled with a lighter than air gas like hydrogen or helium.

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Filed Under: Physics

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Q:

Which command displays the present workig directory in UNIX?

A) $who B) $pwd
C) $who are you D) None
 
Answer & Explanation Answer: B) $pwd

Explanation:

$pwd - present working directory

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Filed Under: Operating Systems

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Q:

Who is the author of the book ' The Goldfinch'

Answer

Donna Tratt

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Subject: Books and Authors

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Q:

In addition to nitric acid, another acid which may render iron passive is 

A) acetic acid B) oxalic acid
C) chromic acid D) citric acid
 
Answer & Explanation Answer: C) chromic acid

Explanation:

Passivity of iron is due to formation of an extremely thin and impervious film of ferrosoferric oxide Fe3O4on the surface of iron. Chromic acid, being a powerful oxidising agent (like nitric acid ) renders iron passive. 

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Filed Under: Chemistry

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Q:

Indus Valley Civilization is called the protohistoric civilization because its people knew 

A) art B) writing
C) copper D) pottery
 
Answer & Explanation Answer: B) writing

Explanation:
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Filed Under: General Awareness

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Q:

Which track and field star overcame childhood polio to became one of the greatest athlets of her time

A) Wilma Rudolph B) Gail devers
C) Florence Griffith Joyner D) Jackie Rrobinson
 
Answer & Explanation Answer: A) Wilma Rudolph

Explanation:
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Filed Under: Sports

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Q:

When the demand of a commodity also depends upon prices of the substitutes & complementaries or relative prices then it is called

A) Income-Demand B) Price-demand
C) Cross-Demand D) None
 
Answer & Explanation Answer: C) Cross-Demand

Explanation:
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Filed Under: Business Awareness
Exam Prep: Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

18 4271
Q:

Which best describes a tetrad?

A) A diploid cell B) Two gametes
C) Four chromatids D) A haploid cell
 
Answer & Explanation Answer: C) Four chromatids

Explanation:

A tetrad is best described by Four chromatids. It is formed from two homologous chromosomes, each consisting of two chromatids in the first stage of meiosis called prophase1.

 

A_tetrad_is_made_up_of1562827273.jpg image

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

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