Questions

Q:

Jaduguda mines are famous for

A) mica deposits B) uranium deposits
C) gold deposits D) iron ore
 
Answer & Explanation Answer: B) uranium deposits

Explanation:

The Jaduguda Mine also known as Jadugoda or Jadugora is a Uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand.

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13 6025
Q:

What are the reactants in a chemical reaction?

Answer

In a chemical reaction, substances (elements or compounds) called reactants are changed into other substances (compounds or elements) called products. Hence, reactants are those which start the chemical reaction.


 


For example:


1. In the burning of natural gas, methane (CH4) and oxygen (O2) are the reactants in the chemical reaction. are the substances formed by a chemical reaction. In the burning of natural gas, carbon dioxide (CO2) and water (H2O) are the products formed by the reaction.


 


2. H2+O2 ----> H2O


Here H2 & O2 are called Reactants and H2O is called Product.


 

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4 6023
Q:

Who is the father of Tissue Culture ?

A) Gautheret B) Haberlandt
C) Bonner D) Laibach
 
Answer & Explanation Answer: B) Haberlandt

Explanation:
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14 6022
Q:

The memory unit is one part of

A) Input Device B) Central Processing Unit
C) Control Unit D) Output device
 
Answer & Explanation Answer: B) Central Processing Unit

Explanation:

In a computer, memory is one part of Central processing unit i.e, CPU.

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14 6022
Q:

Which of the following is tropical grassland?

A) Savannah B) Pampas
C) Prairies D) Taiga
 
Answer & Explanation Answer: A) Savannah

Explanation:

Tropical grasslands, or savannas, are also the homes of primates in Africa and Asia; no savanna-living primates exist in South America. Tropical grasslands comprise a mixture of trees and grasses, the proportion of trees to grass varying directly with the rainfall.

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11 6021
Q:

Who amongst the following is the Secretary General of UNO

A) Koffi Annan B) Shashi Tharoor
C) Gordon Drown D) Hugo Chavez
 
Answer & Explanation Answer: A) Koffi Annan

Explanation:
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2 6020
Q:

Water is a compound because it?

A) it contains two different elements joined by chemical bond B) it contains hydrogen & oxygen
C) it exists as solid, liquid or gas D) it cannot be split up into simpler substances by chemicals means
 
Answer & Explanation Answer: A) it contains two different elements joined by chemical bond

Explanation:

We know that All compounds are molecules, but not all molecules are compounds.

Water is a molecule because it is made from atoms that have been chemically combined. It is also a compound because the atoms that make water are not all the same - some are oxygen and some are hydrogen.

 

Hence, Water is a molecule and a compound.

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7 6017
Q:

Esc key in a windows keyboard is not used to

 

A) Close a dialog-box B) Run a selected command
C) Cancel a command D) Close a selected drop down list
 
Answer & Explanation Answer: B) Run a selected command

Explanation:
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9 6015