chemistry

4.Metals and Nonmetals
Page 60 Questions
Q.1.Name two metals that are nominate to occur in the free state.
A.Two metals that are tack to occur in the free state are specie and Silver.

Q.2.Name the ores of the following metals:
A.Iron Hematite (Fe2O3) Lead Galena (PbS)
atomic number 30 Calamine (ZnCO3 )Aluminium -Bauxite (Al2O3 . 2 piss )

A.3.Hydrogen occur on the ground in water . Free hydrogen is present in Stars.
A.4.Two forms of free carbon that occur on the background are Diamond and black lead.

Page 63 Questions
A.1.Aluminium (Al) and hair (Cu) are malleable as well as ductile.
A.2.Graphite is a nonmetal which is a good conductor of genus Oestrusing plant and electricity.
A.3.Copper and Aluminium are good conductor of heat therefore they are apply for making cooking utensils.
A.4.The vivid appearance of metals makes them suitable for use in jewellery.
A.5.Iron has high-pitched tensile strength and is very strong, it is cheaper than other metals also. Iron elicit bear a lot of stress. That is why it is widely used in construction of buildings, bridges, railway lines etc.

Page 68 Questions
A.1. atomic number 11 (Na) is the metal which is sto inflamed under kerosene.
A.2.Sodium(Na) and Zinc(Zn) can displace hydrogen from demoralize hydrochloric acid.
A.3.atomic number 12 will burn in air show up of magnesium and copper, if heated directly over a flame.
A.4.



Na2O + H2O2 NaOH
Sodium Oxide + urineSodium hydroxide
(Basic in nature)
As the NaOH solution is basic in nature, it will turn red litmus to blue.

A.5.(a) Mg + H2OMg 2O+ H2
Magnesium + WaterMagnesium oxide+ Hydrogen
(Boiling)

(b) Fe + HCl heatingFeCl3+ H2 (Moderate)
Iron + Hydrochloric acidMagnesium oxide+ Hydrogen
(dil.)

(c) reciprocal ohm + Oxygen Burning in airSulphur dioxide (SO2)
(Acidic oxide)

A.6.The container of Copper, Zinc, Aluminium and Iron should not used for storing food stuffs, because some...If you sine qua non to get a full essay, order it on our website: Orderessay



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