Questions

Q:

What is the bond order of O2?

A) 1.5 B) 2
C) 2.5 D) 1
 
Answer & Explanation Answer: B) 2

Explanation:

The number of bonds between a pair of atoms is called the bond order.

Bond orders can be calculated from Lewis structures, which are the heart of the valence-bond model. Oxygen, for example, has a bond order of two.

Structure

When there is more than one Lewis structure for a molecule, the bond order is an average of these structures. The bond order in sulfur dioxide, for example, is 1.5  the average of an S-O single bond in one Lewis structure and an S=O double bond in the other.

Structures

In molecular orbital theory, we calculate bond orders by assuming that two electrons in a bonding molecular orbital contribute one net bond and that two electrons in an antibonding molecular orbital cancel the effect of one bond. We can calculate the bond order in the O2 molecule by noting that there are eight valence electrons in bonding molecular orbitals and four valence electrons in antibonding molecular orbitals in the electron configuration of this molecule. Thus, the bond order is two.

Equation

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Q:

According to RBI instructions in 2014 January, The currency notes made before this year of the following  are called back.

 

A) 2008 B) 2010
C) 2005 D) 2007
 
Answer & Explanation Answer: C) 2005

Explanation:
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Filed Under: General Awareness

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Q:

Who Invented Traffic Signal ?

A) Lewis Edson Waterman B) Levi Strauss
C) Percy LeBaron Spencer D) Garrett Augustus Morgan
 
Answer & Explanation Answer: D) Garrett Augustus Morgan

Explanation:
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Filed Under: Inventions

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Q:

Which one of the following actors was awarded the Dada Saheb Phalke Award at the 59th National Film Festival

A) Soumitra Chatterjee B) Ketan Mehta
C) Shekhar Kapoor D) Mahesh Bhatt
 
Answer & Explanation Answer: A) Soumitra Chatterjee

Explanation:
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Q:

Amoeba belongs to the phylum

A) Protozoa B) Annelida
C) Porifera D) Platyhelminthes
 
Answer & Explanation Answer: A) Protozoa

Explanation:
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Filed Under: Biology

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Q:

Nucleons are

A) protons and neutrons B) neutrons and electros
C) protons and electrons D) protons, neutrons and electrons
 
Answer & Explanation Answer: A) protons and neutrons

Explanation:
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Q:

Who among the following was the first Indian to receive the Megsaysay award

A) Vinoba bhave B) Mother teresa
C) R.K.Laxman D) T.N.Seshan
 
Answer & Explanation Answer: A) Vinoba bhave

Explanation:
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Q:

A Transparent DBMS

A) Keep its logical structure hidden from users B) Can access control
C) Keeps its physical structure hidden from users D) Can not hide sensitive information from users
 
Answer & Explanation Answer: C) Keeps its physical structure hidden from users

Explanation:

DBMS :: Database Managemet System.

A DBMS which keeps its physical structure hidden from the user is known as a transparent DBMS.

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