NSO Level 1 Science Olympiad (SOF) Class 10: Questions 71  76 of 986
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Question number: 71
Question
If the of the solution is 7, it means that it is ________
Choices
Choice (4)  Response  

a.  Acid  
b.  Base  
c.  Neutral  
d.  Question does not provide sufficient data or is vague 
Question number: 72
Question
Each boy contributed rupees equal to the number of girls and each girl contributed rupees equal to the number of boys in a class of 60 students. If the total contribution thus collected is Rs. 1600, how many boys are there in the class?
Choices
Choice (4)  Response  

a.  20  
b.  40  
c.  60  
d.  Data inadequatic 
Question number: 73
» Chemical Reactions and Equation
Question
Complete the following reaction:
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 74
Question
A class starts at and last till 5 p. m. Five periods are held during this interval. After every period 10 minutes are given free to the students. The exact duration of each period is ________.
Choices
Choice (4)  Response  

a.  58 minutes  
b.  40 minutes  
c.  50 minutes  
d.  49 minutes 
Question number: 75
Question
pH of the hydrochloric acid is ________that of acetic acid solution of the same concentration.
Choices
Choice (4)  Response  

a.  More than  
b.  Less than  
c.  Equal to  
d.  None of the above 
Question number: 76
Question
The smallest fraction, which each of .
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
