Transition elements

Question 1

What are chelates

Answer 1

bonding of polydentate ligand to metal ion through more than one site

Question 2

What are the anomalies in binding energy

Answer 2

Cr and Mn as their metallic structure is different

Question 3

What are the complementary colours of the following
orange
red
violet

Answer 3

orange - blue
red - yellow
violet - green

Question 4

what ions give colourless compounds

Answer 4

The ions with zero unpaired electrons
Zn+2, Ti+4, Cu+, Sc+3

Question 5

what colour do ions with one paired electrons give:
Ti+3, Cu+2

Answer 5

Ti gives purple and copper gives blue

Question 6

What colour do ions with two unpaired electrons give
V+3, Ni+3

Answer 6

V gives green and Ni gives green

Question 7

What colour do ions with three unpaired electrons give
Cr+3, Co+2

Answer 7

Cr gives deep green and Co gives pink

Question 8

What colour do ions with four unpaired electrons give
Cr+2, Fe+2

Answer 8

Cr+2 gives blue and Fe gives green

Question 9

What colour do ions with five unpaired electrons give
Fe+3

Answer 9

yellow

Question 10

Which elements show maximum oxidation state

Answer 10

Ru and Os with +8

Question 11

What is the most common oxidation state in 3d

Answer 11

+2

Question 12

Which element has the max oxidation state in 3d

Answer 12

Manganese with +7

Question 13

In 3d which oxidation is most common in the beginning and ending of transition element

Answer 13

in begin its +3 and end +2

Question 14

Which element has max range of oxidation state

Answer 14

Mn

Question 15

Which catalyst is used in the ziegler-natta polymerization

Answer 15

TiCl4

Question 16

Which catalyst is used in the wacker process

Answer 16

Cu to convert ethylene to acetylaldehyde

Question 17

Which elements poison nickel catalyst

Answer 17

Pb and arsenic

Question 18

In T.E which element has max ionization energy

Answer 18

Zn

Question 19

Which element has min ionization energy in T.E

Answer 19

Sn

Question 20

arrange following alloys of iron in ascending order of carbon content
cast iron, steel, wrought

Answer 20

wrought, steel, cast iron

Question 21

What is the most abundant T.E

Answer 21

iron

Question 22

What magnetism do Fe, Co and Ni show

Answer 22

ferromagnetism

Question 23

What are Pt, Pb, Rh called

Answer 23

nobel metals

Question 24

What elements are in earth’s crust

Answer 24

Aluminum, oxygen and silicon

Question 25

What is fool's gold

Answer 25

pyrite or iron sulphide

Question 26

what is richest ore of iron

Answer 26

magnetite

Question 27

How do you name complex compounds

Answer 27

1.first comes the cation which is mentioned first 2. then number of ligand and ligand half name 3. then central atom eg K[Fe(Cn)6] so potassium hexacyanoferrate

Question 28

which elements usually give linear shape in 2 coordination

Answer 28

Cu, Ag, Au

Question 29

Which compound gives bent arrangement in 2 coordination

Answer 29

[Ag(SCN)]

Question 30

What are 4 coordinated tetrahedral complex ions

Answer 30

CuCl4 and CoCl4

Question 31

What is a 4 coordinated square planar complex

Answer 31

cisplatin [Pt(Cl)2(NH3)2] cis-diamminedichloroplatinum

Question 32

What complexes have octahedral shape

Answer 32

6 coordinated

Question 33

What are non typical transition elements

Answer 33

elements which do not have half filled orbitals in any ionic state

Question 34

what are non typical transition elements

Answer 34

Group IIB (Zn, Cd, Hg) Group IIIB (Sc, Y, La)

Question 35

What oxidation state to typical transition elements show

Answer 35

non variable