ETEA Per Engineering Papers

Q: Li, Na, K ions in acidified solution can best be separated by

(a) :  gas chromatography
(b) :  gas liquid chromatography
(c) :  thin layer chromatography
(d) :  ion exchange chromatography
(e) :  None
Answer:  gas liquid chromatography
Explanation:  

Q: Product of the roots of the equation: ax²-bx+c=0 where a,b,c ϵ R & a≠0

(a) :  c/a
(b) :  c-/a
(c) :  Undefined
(d) :  None
Answer:  Undefined
Explanation:  

Q: Which of the following type of force can do no work

(a) :  Elastic ofrce
(b) :  Frictional force
(c) :  Gravitational force
(d) :  Centripetal force
(e) :  None
Answer:  Centripetal force
Explanation:  

Q: Magnitude of the vector a= (I - j) + (j-I) + (k - j) is

(a) :  √3
(b) :  √2
(c) :  2√2
(d) :  2√3
(e) :  None
Answer:  2√3
Explanation:  

Q: You can't agree with both of them ……..

(a) :  make your opnion u
(b) :  make your mind up
(c) :  make brain up
(d) :  make up your mind
(e) :  None
Answer:  make your mind up
Explanation:  

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