Questions

Q:

Which phase change is an example of an exothermic process?

A) Liquid to Solid B) Gas to Solid
C) Gas to Liquid D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Processes that require or give off heat will be limited to changes of state, known as phase changes, and changes in chemical constitution, or chemical reactions. Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.

 

An exothermic process is one that gives off heat, which is transferred to the surroundings. An endothermic process is a reaction which heat has to be supplied to the system from the surroundings.

 

Here in all the given options, heat is taken away from them to change there phase. 

Liquid to Solid --- Freezing

Gas to Liquid --- Condensation

Gas to Solid --- Deposition 

are all examples of exothermic processes.

 

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Q:

Chemical Co- ordination in the body is brought out by

A) Blood B) Lymph
C) Enzymes D) Hormones
 
Answer & Explanation Answer: D) Hormones

Explanation:
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Q:

A gland below the bladder and surrounding the urethra?

A) Prostate B) Vas deferens
C) Seminal vesicle D) Bulbourethral
 
Answer & Explanation Answer: A) Prostate

Explanation:

The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The prostate gland contributes additional fluid to the ejaculate. Prostate fluids also help to nourish the sperm. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.

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Q:

Which team advanced to the Coap America Finals 2011 without winning any of its five matches in open play?

A) Brazil B) Paraguay
C) Venezuela D) Peru
 
Answer & Explanation Answer: B) Paraguay

Explanation:
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Q:

The closest algal relatives of land plants are

A) charophytes B) chrysophytes
C) rhodophytes D) bacillariophytes
 
Answer & Explanation Answer: A) charophytes

Explanation:

The charophytes are the extant group of green algae that are most closely related to modern land plants.

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Q:

Who amongst the following won a Nobel Prize for literature when he was the head of the Government

A) Shimon peres B) Henry Kissinger
C) Sir Winston Churchill D) James earl carter
 
Answer & Explanation Answer: C) Sir Winston Churchill

Explanation:
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Q:

The term "simple carbohydrates" refers to

A) polysaccharides B) monosaccharides and disaccharides
C) starch and glycogen D) dietary fiber
 
Answer & Explanation Answer: B) monosaccharides and disaccharides

Explanation:

Simple carbohydrates are also called as Simple sugars. Monosaccharides and Disaccharides refers to simple carbohydrates.

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Q:

 Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?

A) Nonrepeatable read B) Phantom read
C) Dirty read D) Consistent read
 
Answer & Explanation Answer: A) Nonrepeatable read

Explanation:
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