NAT I Engineering Chemistry With Answers

image
image
image

NAT I Engineering Chemistry

Sr. # Questions Answers Choice
1 Phosphide ion has the electronic structure similar to that of Nitride ion Fluoride ion Sodium ion Chloride ion
2 Which one of the following elements occurs free in nature?  N P As Sb
3 Red lead is PbO Pb<sub>3</sub>O<sub>4</sub> <span style="font-size: 14.44444465637207px;">Pb</span><span style="font-size: 14.44444465637207px;">O</span><sub>2</sub> <span style="font-size: 14.44444465637207px;">Pb</span><sub>4</sub><span style="font-size: 14.44444465637207px;">O</span><sub>3</sub>
4 The principle constituent of pyrex glass is Zn B Pb CI
5 The halide which is not hydrolysed is SiCI<sub>4</sub> SiF<sub>4</sub> CCI<sub>4</sub> PbCI<sub>4</sub>
6 Galena is an ore of Gallium Lead Tin Germanium
7 The substance used as a smoke screen in warfare is SiCI<sub>4</sub> PH<sub>3</sub> PCI<sub>5</sub> Acetylene
8 AI is more reactive than Fe but AI is less easily corroded than Fe Because It is a noble metal Oxygen forms a protective reaction easily with water Iron undergoes reaction easily with water Fe form mono and divalent ions.
9 Alum is not used As a mordant in dyeing As an insecticide In purification of water In tanning of leather
10 Which is true for an element R present in group 13 of the periodic table? It is a gas at room temperature It has oxidation state of +4 It forms R<sub>2</sub>O<sub>3</sub> It forms RX<sub>2</sub>
Download This Set
×