NAT I Engineering Chemistry With Answers

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NAT I Engineering Chemistry

Sr. # Questions Answers Choice
1 In which of the following elements +1 oxidation state is more stable than +3 B AI Ga Ti
2 Inert pair effect plays an important role in case of F AI Si TI
3 Which metal is protected by a layer of its own oxide? AI Ag Au Fe
4 Which is the most amphoteric? Na<sub>2</sub>O MgO AI<sub>2</sub>O<sub>3</sub> CaO
5 Which of the following mineral does not contain AI? <span style="font-size: 14.44444465637207px;">Cryolite</span> <span style="font-size: 14.44444465637207px;">Mica</span> <span style="font-size: 14.44444465637207px;">Feldspar</span> <span style="font-size: 14.44444465637207px;">Fluorspar</span>
6 Which one of the following has the lowest boiling point? <span style="font-size: 14.44444465637207px;">B</span> <span style="font-size: 14.44444465637207px;">AI</span> <span style="font-size: 14.44444465637207px;">Ga</span> <span style="font-size: 14.44444465637207px;">Ti</span>
7 Which of the following is different from the other three oxides? MgO SnO ZnO Cr<sub>2</sub>O<sub>3</sub>
8 Bleaching action of bleaching powder is due to the liberation of O<sub>2</sub> OCI<sup>-</sup> CI<sub>2</sub> CI<sup>-</sup>
9 The wire in the flash bulbs is made up of Mg Ba Cu Ag
10 Portland cement is manufactured by using Limestone,clay and sand Limestone,gypsum and sand Limestone,gypsum and alumina Limestone,clay and gypsum
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