Questions

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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Q:

Computer software can be defined as

 

A) the interaction between the computer and its database B) an interface between the computer and the network
C) the computer and its associated equipment D) the instructions that tell the computer what to do
 
Answer & Explanation Answer: D) the instructions that tell the computer what to do

Explanation:
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Q:

Which of the following Asian language are UN official language

A) Chinese & Japanese B) Chinese & Hindi
C) Japanese & Arabic D) Chinese & Arrabic
 
Answer & Explanation Answer: D) Chinese & Arrabic

Explanation:
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Q:

Which physical connection is the fastest?

A) Coaxial cable B) Infrared
C) Microwave D) Fiber-optic
 
Answer & Explanation Answer: D) Fiber-optic

Explanation:

Fiber-optic physical or wired connection is the fastest communication connection.

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Q:

Sensitive data is always classified.

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

Explanation:

FALSE. Sensitive data is NOT always classified.


 


Sensitive information is data that must be protected from unauthorized access to safeguard the privacy or security of an individual or organization.



There are three main types of sensitive information:


1. Personal information


2. Business information


3. Classified information



Data is "Classified" based on the damage that might result from unauthorized disclosure. Some data is Sensitive, but will not necessarily do harm to the country if released publicly - such as PII- which could do harm to individuals if released but not necessarily the country.

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Q:

Which Battle marked the end of Napoleon era

Answer

Waterloo

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Subject: World History

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Q:

Select the correct statement (s).

A) When energy is transferred to the system from the surrounding as work, the surrounding do work on the system and the value of work (W) positive. B) When energy is transferred from the system to the surrounding as work, work is done on the surrounding and the value of W is negative.
C) Both (A) and (B) D) None of the above
 
Answer & Explanation Answer: C) Both (A) and (B)

Explanation:
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Q:

Communication by touch is called

 

A) Haptics communication B) Proxemics communication
C) Semantics communication D) Chronemics communication
 
Answer & Explanation Answer: A) Haptics communication

Explanation:

Communication by touch is called Haptics communication and the study of this is called as Haptics.

 

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