NAT I Engineering Chemistry With Answers

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NAT I Engineering Chemistry

Sr. # Questions Answers Choice
1 Which of the following units represents largest amount of energy? Calorie Joule Erg Electron vol.
2 Evaporation of water is An exothermic change An endothermic change A process where no heat changes occur A process accompanied by chemical
3 Inter molecular forces in solid hydrogen are <span style="font-size: 14.44444465637207px;">Covalent forces</span> <span style="font-size: 14.44444465637207px;">Van der Waal forces or London dispersion force</span> <span style="font-size: 14.44444465637207px;">Hydrogen bonds</span> <span style="font-size: 14.44444465637207px;">All of these</span>
4 According to MO Theory the species O+2 possesses Bond order of 2.5 Three unpaired electrons Diamagnetic character Stability lower then O<sub>2</sub>
5 The bond angle H - O - H in ice is closest to 120° , 28° 60° 90° 109°
6 The carbon atoms in calcium carbide are held by Ionic bonds 2 sigma bonds 2 covalent one co-ordinate bond 2&nbsp;π and one&nbsp;σ<b>&nbsp;bond</b>
7 Which of the following geometry is associated with the compound in which the central atom assumes sp3 d hybridization? Planar Pyramidal Angular Trigonal bipyramidal
8 Covalent compounds are soluble in Polar solvents Non-polar solvents Concentrated acids All solvents
9 Among the alkaline earth metals the element forming predominantly covalent compounds is Be Mg Sr Calcium
10 Hydrogen chloride molecule contains Covalent bond Double bond Co-ordinate bond Electrovalent bond
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