NSO Level 1 Science Olympiad (SOF) Class 10: Questions 130  135 of 986
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Question number: 130
Appeared in Year: 2011
Question
If every side of a triangle is doubled, then increase in the area of the triangle is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 131
» Chemical Reactions and Equation
Question
What does color of change when iron nail is dipped in it?
Choices
Choice (4)  Response  

a.  Light green to reddish brown  
b.  Brown to light green  
c.  Blue to light green  
d.  Light green to blue 
Question number: 132
Question
The ratio of two numbers is and their sum is 400. The smaller of the two numbers is?
Choices
Choice (4)  Response  

a.  160  
b.  180  
c.  120  
d.  200 
Question number: 133
Question
Find the roots of the equation .
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 134
Question
Which of the following aqueous solution will cause litmus paper to turn red?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 135
Question
Granny starts from her house towards West. After walking a distance of 30 metres, she turned towards right and walked 20 metres. She then turned left and moving a distance of 10 metres, turned to her left again and walked 40 metres. She now turns to the left and walks 5 metres. Finally she turns to her left. In which direction is she walking now?
Choices
Choice (4)  Response  

a.  South  
b.  East  
c.  NorthWest  
d.  North 