chem

Question 1

Metallic or not?

Answer 1

Metallic

Question 2

Hard or soft with exeptions

Answer 2

Hard, Zn Hg and Cd

Question 3

Volatility with exeptions

Answer 3

Low,Zn Hg and Cd

Question 4

Radius with reason

Answer 4

Sc to Cr reduces, Fe Co Ni same, effective nuclear charge increases

Question 5

Density with reason

Answer 5

Increases with atomic number as mass increases while volume is low

Question 6

Enthalpy of atomisation

Answer 6

High

Question 7

Ionisation enthalpy

Answer 7

Increases with increase in the nuclear charge

Question 8

Why does it have variable oxidation state?

Answer 8

Because of participation of both (n-1)d and ns orbitals

Question 9

Why are there more OS in fluorides and oxides?

Answer 9

Bcoz they are strong oxidising agents

Question 10

Electrode Potential

Answer 10

Increases with an increase in atomic number and depend of enthalpy of atomisation, ionisation and hydration.

Question 11

Why is Cu2+ more stable than Cu+?

Answer 11

Lower reduction potential due to higher hydration energy

Question 12

Magnetic Property

Answer 12

Diamagnetic for PE and Para for UPE

Question 13

Magnetic moment formula

Answer 13

u = root [n(n+1)]

Question 14

Why are they used as catalysts?

Answer 14

Variable OS and ability to form complexes

Question 15

Colour

Answer 15

UPE C and PE CL

Question 16

Why do they form complexes?

Answer 16

Empty d orbital, Small size and more charge on the cation

Question 17

Value and variation of reduction potential

Answer 17

Low, irregular

Question 18

Acidic Basic, Ionic Covalent nature

Answer 18

Low B I ; Med A ; High A C