Question

	rate of evaporation	Viscosity	Solubility	color of dilute aqueous solution or pure liquids on litmus paper	effect of aqueous solution or pure liquids on litmus paper	reaction with BaCl_2 (aq) or AgNO_3 (aq)	solubility in solvents other than water,such as ethanol	ability to decolorize a dilute solution of KMnO_4	Reaction with (NaON) or (NH_3)	Reaction with (HCI) or (NH_3)	Flammability and / or color of the flame
Mg
Al
Zn
C
S
MnO2
KMnO4
LiCl
Li2CO3
NaCl
NH4Cl
CaCl2
SrCl2
Cu(NO3)2•3H2O
Ni(NO3)2•6H2O
NaHCO3
Li2CO3
CaCO3
K2CO3
FeS
KAl(SO4)2•12H2O
CaSO4
CuSO4•5H2O
Na2SO3
Na2B4O7•10H2O
K2CrO4
CrCl3
Cr2O3
Cr(NO3)3
C12H22O11
HNO3
HCl
H2SO4
NaCl
NH3(aq)
NaOH
CH3OH
C2H5OH
(CH3)2CO
C6H12
C2H4(OH)2
C_2H_4(OH)_2

Answer 1

1) Mg

heat of vaporisation=128KJ/mol

viscosity-(at melting point) 1.44 mPas

solubility-Mg2+ salts are soluble in aqueous solvents due to polar characteristics

color of dilute aqueous solution or pure liquids on litmus paper-neutral so no color change of litmus

effect of aqueous solution or pure liquids on litmus paper-no effect

reaction with BaCl_2 (aq) or AgNO_3 (aq) =no precipitation as Mg -Mg is more reactive so displaces less reactive metals from their salts-MgCl2 with BaCl2 and Mg(NO3)2 with AgNO3

solubility in solvents other than water,such as ethanol-Not soluble in aqueous or organic solvents,Mg2+ salts are ionic so soluble in water (Polar)

ability to decolorize a dilute solution of KMnO4- yes, Mg is in its reduced form so can only get oxidized to Mg2+ by reducing KMnO4 (+7 oxidation state )to (Mn2+),decolorised,vigourous reaction.

Reaction with (NaON) or (NH_3-MgO with NaOH (in aqueous solution)

4NaOH+ 2Mg-->2MgO+2Na2O+H2 (bubbles)

Reaction with (HCI) or (NH_3)-MgCl2 and H2 with HCl

Mg+2HCl---->MgCl2+H2

flammability-flame temperature upto 3100 deg C,bright white colored flame