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Q:

The carbon tetrachloride molecule (CCl4) is

A) a nonpolar molecule with polar bonds B) a nonpolar molecule with nonpolar bonds
C) a polar molecule with polar bonds D) a polar molecule with nonploar bonds
 
Answer & Explanation Answer: A) a nonpolar molecule with polar bonds

Explanation:

The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is cancelled by the symmetric tetrahedral shape. Hence, making the net dipole as zero and molecule as non-polar.

 

When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes polar.

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

Database is a collection of concepts that can be used to describe the structure of a database

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

Explanation:

Database provides necessary means to achieve this abstraction. By structure of a database we mean the data types, relations, and constraints that should hold on the data.

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Subject: Database
Job Role: Database Administration

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Q:

"Indo - ________" joint army exercise 'Prabal Dostyk 2017' has started in Himachal Pradesh.

A) Kazakhstan B) Japan
C) Sri Lanka D) Nepal
 
Answer & Explanation Answer: A) Kazakhstan

Explanation:
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Filed Under: General Awareness
Exam Prep: Bank Exams
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Q:

 A transaction for which all committed changes are permanent is called:

A) atomic. B) consistent.
C) isolated. D) durable.
 
Answer & Explanation Answer: D) durable.

Explanation:
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Filed Under: Database

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Q:

We Can still delete a row from primary table if there are related rows in secondary table once a refferential integrity is enforced

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

Explanation:

Can’t delete a row from primary table if there are related rows in secondary table.

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Subject: Database
Job Role: Database Administration

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Q:

In which sport did an Indian team comprising Kishen Singh, Bijay Singh, Hanut Singh and Sawai Man Singh win the World Cup in France in 1957?

Answer

Polo

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Subject: General Awareness

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Q:

Why was the 1955 UN General Assembly called "Menon Session" or "Menon Assembly"?

Answer

Because V K Krishna Menon spoke for 13hours continuously while representing india.

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Subject: General Awareness

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Q:

The country which covers two continents is 

A) USSR B) Canada
C) Australia D) Indonesia
 
Answer & Explanation Answer: A) USSR

Explanation:

The USSR( now a Common Wealth of Independent States) is spread over Europe and Asia

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Filed Under: World Geography

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