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Q:

A program which helps create written documents and lets you go back and make corrections as necesary ______

A) Spreadsheet B) Personal writer
C) Word printer D) Word processor
 
Answer & Explanation Answer: D) Word processor

Explanation:
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Q:

State funding of elections takes place in

A) Germany and Austria B) USA and Canada
C) France and Italy D) Britain and Switzerland
 
Answer & Explanation Answer: A) Germany and Austria

Explanation:
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Q:

A person who writes decoratively

A) Choreographer B) Cartographer
C) Calligrapher D) Collier
 
Answer & Explanation Answer: C) Calligrapher

Explanation:

A person who writes decoratively is known as Calligrapher.

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Q:

The Highest dam in india is the _________dam

A) Maithan B) Bhakra
C) Hirakud D) Machkund
 
Answer & Explanation Answer: B) Bhakra

Explanation:

The Bhakra dam is 226 metres high and is one of the highest dams in the world.

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Q:

Which country has always remained free from foreign rule?

A) Phillipines B) Nepal
C) USA D) Laos
 
Answer & Explanation Answer: B) Nepal

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Filed Under: World History

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Q:

Logical puzzle

Take from a pack of cards all the Aces, Kings, Queens and Jacks.
Arrange them in a 4 × 4 square so that every row, column and diagonal contains one card of each value (A,J,Q,K) and one card of each suit (Heart, Spade, Diamond, Club).

Answer

Our Solution:


Here is one solution of many:


 


Take_from_a_pack_of_cards_all_the_Aces,_Kings,_Queens_and_Jacks._1585550868.jpg image


 






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Q:

Major coalfields of India are located in the river valley of

A) Damodar B) Godavari
C) Mahanadi D) Wardha
 
Answer & Explanation Answer: A) Damodar

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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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