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81. A compound has empirical formula CH2 to which hydrocarbon series does it belong (NTSE Chhattisgarh, Stage-I, 2015-16)
Alkane
Cycloalkane
Alkyne
None of these
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82. Identify the type of reaction occuring between ethene and hydrogen (NTSE Chhattisgarh, Stage-I, 2015-16)
Oxidation
Dehydration
Addition
Substitution
83. What is the structure of aldehyde function group? (NTSE Madhya Pradesh, Stage-I, 2015-16)
C - C = O
84. Write the IUPAC name of (NTSE Madhya Pradesh, Stage-I, 2015-16)
Neo-pentane
2, 2 dimethylpropane
2-methylbutane
2, 3 dimethyl propane
85. Temporary hardness of water is due to compound 'A' and can be removed by adding compound 'B'. A and B respectively can be (NTSE Haryana, Stage-I, 2015-16)
Mg(HC03)2' CaC03
CaS04, HCI
CaCI2, MgS04
Ca(HC03)2' Ca(OH)2
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(NTSE Madhya Pradesh, Stage-I, 2015-16)