NSO Level 1 Science Olympiad (SOF) Class 10: Questions 8  13 of 986
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Question number: 8
Question
A class starts at 9 a. m. and lasts till Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ________.
Choices
Choice (4)  Response  

a.  38 minutes  
b.  47 minutes  
c.  50 minutes  
d.  35 minutes 
Question number: 9
Question
Which of the following is incorrect for acid?
Choices
Choice (4)  Response  

a.  Acid turns red litmus blue.  
b.  All the compounds containing are acidic.  
c.  All the acid have sour test.  
d.  All the acids generates Hgas on reacting with metal 
Question number: 10
Appeared in Year: 2011
Question
If both and belong to the set , then the number of equation of the form having real roots is ________.
Choices
Choice (4)  Response  

a.  12  
b.  7  
c.  6  
d.  10 
Question number: 11
Question
Four camels are tethered at four corners of a square plot of side so that the adjacent camels can just reach one another. There is a small circular pond of area at the centre. Find the ungrazed area.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 12
Appeared in Year: 2011
Question
If , then ________
Choices
Choice (4)  Response  

a.  0  
b.  3  
c. 
 
d.  1 
Question number: 13
Question
A money lender finds that due to a fall in the rate of interest from , his yearly income diminishes by Rs. 100. His capital is ________.
Choices
Choice (4)  Response  

a.  Rs. 20000  
b.  Rs. 12000  
c.  Rs. 23500  
d.  Rs. 15800 