Questions

Q:

what is the gram formula mass of NH43PO4?

A) 139.54 B) 140.70
C) 149.08 D) 153.24
 
Answer & Explanation Answer: C) 149.08

Explanation:

The gram formula mass is nothing but molar mass.

 

Composition :

 

Symbol      Element       Atomic weight       Atoms
   

     P         Phosphorus       30.973762               1       = 30.973
   

     O         Oxygen             15.9994                  4       =  63.998
   

     N         Nitrogen            14.0067                  3       =  42.020
   

     H         Hydrogen          1.00794                  12      =  12.096

   

Total   =  30.973+63.998+42.020+12.096 = 149.087

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Q:

Iron rusting, chemical or physical change

A) Chemical B) Physical
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Chemical

Explanation:

In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust.


The rusting of iron is a chemical change because it is two substances reacting together to make a new substance.

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Q:

In India, the Community Development Programme was started on

A) October 2, 1952 B) October 2, 1957
C) October 2, 1959 D) October 2, 1961
 
Answer & Explanation Answer: A) October 2, 1952

Explanation:
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Q:

Identify the sentence using active voice.

A) Naveen changed the car tire B) That movie was seen by Sarala
C) The money was withdrawn by Rahul D) None of the above
 
Answer & Explanation Answer: A) Naveen changed the car tire

Explanation:

Active voice is used when the subject performs the action stated by the verb.

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Q:

Which of the following sports is most popular worldwide?

A) Football B) Hockey
C) Cricket D) Tennis
 
Answer & Explanation Answer: A) Football

Explanation:

Top five most popular games world wide are :

 

Game name              -      Estimated  fans     -    Popular Regions

 

1. Soccer / Football      -      3.5 Billion    -     Europe, Africa, Asia, America

2. Cricket                    -      2.5 Billion     -    Asia, Australia, UK

3. Basketball               -      2.2 Billion     -    US, Canada, China and Philippines

4. Field Hockey           -       2 Billion       -     Europe, Africa, Asia, Australia

5. Tennis                    -       1 Billion       -     Europe, Americas, and Asia.

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Q:

Copying the logs on the standby/backup server is an operation of Log Shipping

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

Explanation:

It is one of the operation of Log Shipping

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Q:

A sample of matter must be copper if

A) atoms in the sample react with oxygen B) the sample can conduct electricity
C) each atom in the sample has 29 protons D) the sample melts at 1768k
 
Answer & Explanation Answer: C) each atom in the sample has 29 protons

Explanation:

A sample of matter must be copper if each atom in the sample has 29 protons.

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Q:

What type of compound is Lecithin?

A) Sterol B) Phospholipid
C) Lipoprotein D) Glycolipid
 
Answer & Explanation Answer: B) Phospholipid

Explanation:

Lecithin is a Phospholipid type of compounds. The main phospholipids in lecithin from soya and sunflower are phosphatidyl choline, phosphatidyl inositol, phosphatidyl ethanolamine, and phosphatidic acid.

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