Questions

Q:

Order of basicity of amines in gaseous state?

A) 2'> 1'> 3' > NH3 B) 3' > 2' > 1'> NH3
C) 1' > 2' > 3'> NH3 D) 2'> 3'> 1' > NH3
 
Answer & Explanation Answer: B) 3' > 2' > 1'> NH3

Explanation:

The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding.

 

So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic.

 

But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.

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Q:

What do the functions atoi(), itoa() and gcvt () do? Show how would you use them in a program.

Answer

atoi()         Converts a string to an integer.


itoa()         Convert an integer to a string


gcvt()        Converts a floating-point number to a string


 


#include "stdlib.h"


main()


{


      char s[] = "12345";


      char buffer [15], string[20];


      int i;


      


      i = atoi (s);


      printf("\n%d",i);


 


       gcvt (20.141672, 4, buffer);


       printf ("\n%s", buffer);


 


       itoa(15, string,2);


        printf ("\n%s", string);


}

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Q:

Who of the following scientists is named after ISRO in sriharikota ?

A) APJ Abdul Kalam B) Vikram Sarabhai
C) Homi J Baba D) Satish Dhawan
 
Answer & Explanation Answer: D) Satish Dhawan

Explanation:
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Q:

Teotihuacan Pyramids is located in which country?

A) Agentina B) Peru
C) Mexico D) Laos
 
Answer & Explanation Answer: C) Mexico

Explanation:
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Q:

What Asks But Never Answers?

A) Teacher B) Telephone
C) Letter D) Owl
 
Answer & Explanation Answer: D) Owl

Explanation:

An owl.

"What noise does an owl make?

The sound an Owl makes, it sounds like, "Who?" to our ears.

They sounds entire lives asking the same question, but they'll never give any answers.

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Q:

What is the national sport of Pakistan?

 

A) Cricket B) Football
C) Hockey D) Table Tennis  
 
Answer & Explanation Answer: C) Hockey

Explanation:
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Q:

In India, the first hour of every Parliamentary sitting is allotted for ________.

 

A) Question hour B) Half an hour
C) Zero hour D) No option is correct
 
Answer & Explanation Answer: A) Question hour

Explanation:
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Q:

In photography, the compound of nitrogen used is 

A) Potassium nitrate B) Silver nitrate
C) Ammonium carbonate D) Ammonium bicarbonate
 
Answer & Explanation Answer: B) Silver nitrate

Explanation:

Silver nitrate is the basic substance from which silver bromide is obtained. The photographic films are impregnated with the light sensitive AgBr.

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