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16. Which one of the following bases is not present in DNA? (NTSE Jharkhand, Stage-I, 2014-15) (NTSE Bihar, Stage-I, 2014-1 5)
Cytosine
Thymine
Quinoline
Adenine
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17. Which one of the following is classified as a condensation polymer? (NTSE Jharkhand, Stage-I, 2014-15)
Teflon
Acrylonitrile
Dacron
Neoprene
18. The normality of 0.3 M phosphoric acid is (NTSE Delhi, Stage-I, 2012-13)
0.1
0.9
0.3
0.6
19. 1.35 g 'X' element is completely converted to 1.88 g compound 'XO'. What is the atomic weight of 'X'? (NTSE West Bengal, Stage-I, 2013-14)
20.32
40.75
16.25
56.10
20. When 2 moles of N2 gas and 9 moles of H2 gas are mixed and reaction is completed to from NH3 gas then reaction mixture will contain
11 moles of NH3
4 moles of NH3 + 3 moles of H2
6 moles of NH3 + 3 moles of H2
2 moles of NH3 +1 mole of N2
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