See Answer
1: (c) 4, 2: (c) 6, 3: (b) Tetrahedron, 4: (a) Allotrope of carbon, 5: (d) Ozone, 6: (a) 1, 7: (d) 4, 8: (d) 4, 9: (d) C2H6, 10: (c) CnH2n + 2, 11: (a) CnH2n, 12: (d) CnH2n-2, 13: (c) Pentane, 14: (a) Graphite, 15: (b) Diamond, 16: (c) By sharing of electrons, 17: (c) 4, 18: (a) Chloromethane, 19: (b) Acetylene, 20: (a) Ethylene, 21: (a) Formic acid, 22: (d) Formaldehyde, 23: (c) Acetaldehyde, 24: (b) Acetic acid, 25: (a) Formic acid, 26: (c) 5, 27: (d) Butane, 28: (c) Butene, 29: (b) 2, 30: (a) 1, 31: (d) None, 32: (c) 3, 33: (c) Alkanone, 34: (b) Cyclopentane, 35: (a) Pentane, 36: (d) Benzene, 37: (a) Halo, 38: (b) Alkyl group, 39: (a) –OH, 40: (b) –CHO, 41: (c) –COOH, 42: (c) 12, 43: (b) Methyl bromide, 44: (c) Propanol, 45: (d) Heptanal, 46: (b) Aldehyde, 47: (b) Nonanal, 48: (b) Ethyl, 49: (b) Soluble in water, 50: (b) Soluble in water