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76. Graphite is used as a lubricant in machines because it has a very high melting point and also it (NTSE Jharkhand, Stage-I, 2014-15)
Is crystalline
Has layer structure
Is a giant molecule
Is a liquid at room temperature
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77. The IUPAC name of (NTSE Andhra Pradesh, Stage-I, 2014-15)
4-ethelene-1-heptane
3-propylhex-1-ene
4-propyl-hex-6-ene
3-propyl-1-heptane
78. The suitable catalyst in hydrogenation of oil is (NTSE Uttar Pradesh, Stage-I, 2014-15)
Fe
Mg
Ni
Mo
79. In saponification process, the fatty acid present in the oils is neutralised by adding (NTSE Karnataka, Stage-I, 2015-16)
Sodium hydroxide
Aluminium hydroxide
Calcium hydroxide
Magnesium hydroxide
80. Which is not true regarding the micelle (NTSE Karnataka, Stage-I, 2015-16)
The micelle stay in solution as a colloid
Micelle will not come together to precipitate
Thereto ion-ion repulsion
The dirt suspended in the micelles is very difficult to get rinsed off
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