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Q:

Which molecule is nonpolar and has a symmetrical shape?

A) NH3 B) HCl
C) H2O D) CH4
 
Answer & Explanation Answer: D) CH4

Explanation:

Among the given options, CH4 is a non polar molecule with symmetrical tetrahedral shape.

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Filed Under: Chemistry
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Q:

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice.
Somebody told me that there had been a robbery in the jewellery exhibition.

A) I was informed that there was a robbery in the jewellery exhibition. B) I was told by somebody that there has been a robbery in the jewellery exhibition.
C) I was told by somebody about a robbery in the jewellery exhibition. D) I was told about a robbery in the jewellery exhibition.
 
Answer & Explanation Answer: B) I was told by somebody that there has been a robbery in the jewellery exhibition.

Explanation:
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Filed Under: English
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Q:

What is a binary semaphore?

Answer

A binary semaphore is one, which takes only 0 and 1 as values. They are used to implement mutual exclusion and synchronize concurrent processes.


 

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Subject: Operating Systems

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Q:

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best express the same sentence in Indirect/Direct speech.

Vicky said, "I clean my teeth daily."

A) Vicky said he cleans his teeth daily. B) Vicky says he cleans his teeth daily.
C) Vicky said that he cleaned his teeth daily. D) Vicky said that he used to clean his teeth daily.
 
Answer & Explanation Answer: C) Vicky said that he cleaned his teeth daily.

Explanation:
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Filed Under: English
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Q:

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Extremely happy, peaceful, or picturesque

A) Idyllic B) Abominable
C) Iota D) Amiss
 
Answer & Explanation Answer: A) Idyllic

Explanation:
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Q:

Which RNA base pairs with the adenine in DNA?

A) Thymine B) Cytosine
C) Both A & B D) Uracil
 
Answer & Explanation Answer: D) Uracil

Explanation:

In DNA, adenine pairs with Thymine. Similarly, in RNA, due to absence of thymine in RNA and the same structure with uracil helps to pair with adenine.

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Filed Under: Biology
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Q:

Deficiency of fluoride leads to Which one of the following health problems?

A) Tooth caries B) Mottling of tooth
C) Bending of bones D) Stiffening of joints
 
Answer & Explanation Answer: A) Tooth caries

Explanation:

Fluoride deficiency is a disorder which may cause increased dental caries due to a lack of fluoride in the diet. Dental caries or tooth decay is the breakdown of dental tissues by the acidic products released by the "bacterial fermentation of dietary carbohydrates”

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Filed Under: Biology
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Q:

Electric power is measured in units of

A) Volt B) Joule
C) Watt D) Ampere
 
Answer & Explanation Answer: C) Watt

Explanation:

Electric power is the rate per unit time, at which electrical energy is transferred by an electric circuit. The power of electricity is measured in watts and kilo watts.

1 Watt is the unit of electrical power equal to one ampere under the pressure of one volt.

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Filed Under: Physics
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