Invar, an alloy of Fe and Ni is used in watches and meter scale. Its characteristic property is
small coefficient of expansion
resistance of corrosion
hardness and elasticity
magnetic nature
Aqua-regia is obtained by mixing two different acids in the ratio :
1HNO3: 3HCl
2HNO3: 2HCl
1HNO3: 2HCl
3HNO3: 1HCl
A compound with cubic structure is made of elements A and B. A atoms are at the corners of the cube and B atoms are at the face centres. The simplest formula of the compound is :
A5B
AB3
AB
AB6
Colligative properties are used for the determination of :
molar mass
equivalent weight
arrangement of molecules
melting point and boiling point
Identify the mixture that shows positive deviation from Raoult's law :
CHCl3 + (CH3)2CO
(CH3)2CO + C6H5NH
CHCl3 + C6H6
(CH3)2CO + CS2
If ΔG for a reaction is negative, you infer that the change is :
spontaneous
non-spontaneous
reversible
irreversible
Zn(s) | Zn2+(aq)|| Cu2+(aq) | Cu(s) is :
(anode) (cathode)
Weston cell
Daniel cell
Faraday cell
Standard cell
An important industrial solvent, also a laboratory reagent called 2-butanone is nothing but:
methyl ethyl ketone
methyl propyl ketone
dimethyl ketone
diethyl ketone
The catalyst used for the polymerization of olefins is :
Ziegler-Natta catalyst
Wilkinson's catalyst
Pd-catalys
Zeise's salt catalyst
A.
Ziegler-Natta catalyst
Ziegler-Natta is used as catalyst for polymerisation of olefins.