Questions

Q:

Is rusting a physical or chemical change?

Answer

In chemistry rusting is called as oxidation. Oxidation is a chemical process where metal gains oxygen and become oxide. 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. 


 


Rusting would only be a physical change if iron molecules remained pure iron throughout the process.

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Q:

Pitot tube is used to measure

A) static pressure B) velocity at stagnation point
C) stagnation pressure D) dynamic pressure
 
Answer & Explanation Answer: C) stagnation pressure

Explanation:

pitot_tube_is_used_to_measure1547641298.jpg image

Pitot tube is used to measure stagnation pressure.

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Q:

Which is Largest Stadium in the world?

Answer



Strahov Stadium in Praha,Czech Republic accommodation 240000 persons


 


 

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Q:

The average weight of a blue whale is

Answer

1,20,000 kg.

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Q:

What do lines of latitude measure?

A) east-west position between the poles B) north-south position between the poles
C) north-east position between the poles D) south-west position between the poles
 
Answer & Explanation Answer: B) north-south position between the poles

Explanation:

Lines of latitude measure north-south position between the poles.

 

Lines of latitude are imaginary reference lines that describe how far north or south a location on the Earth is from the Equator. The equator is defined as 0 degrees, the North Pole is 90 degrees north, and the South Pole is 90 degrees south. Lines of latitude are all parallel to each other, thus they are often referred to as parallels.

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Q:

Differentiate between Complier and Interpreter?

Answer

An interpreter reads one instruction at a time and carries out the actions implied by that instruction. It does not perform any translation. But a compiler translates the entire instructions

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Q:

Which statement is one component of the cell theory?

A) DNA is the basis of genetic transfer B) All living cells arise from pre-existing cells
C) All cells are composed of same organelles D) Tissues are formed from combinations of cells
 
Answer & Explanation Answer: B) All living cells arise from pre-existing cells

Explanation:

All living cells arise from pre-existing cells is one component of the cell theory.

 

The Cell Theory is one of the basic principles of biology.

 

The Cell Theory states:

1. All living organisms are composed of cells. They may be unicellular or multicellular.

2. The cell is the basic unit of life.

3. Cells arise from pre-existing cells.

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Q:

Which results from an increase in the greenhouse effect?

A) Ocean acidification B) Smog pollution
C) Ozone depletion D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

A greenhouse gas (GHG) is any gas in the atmosphere that absorbs and emits radiation in the thermal infrared range.

 

The increase in average global temperatures that results from an enhanced greenhouse effect.

Effects of increased greenhouse gas emissions:

Increases in the different greenhouse gases have other effects apart from global warming including ocean acidification, smog pollution, ozone depletion as well as changes to plant growth and nutrition levels.

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Filed Under: General Awareness
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