HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Chemistry

Why the ground-state electronic configurations of gadolinium and lawrentium are different than expected?

Answer the following

Cerium and Terbium behave as good oxidising agents in the +4 oxidation state. Explain.

Answer the following

Europium and ytterbium behave as good reducing agents in the +2 oxidation state explain.

What are the causes of lanthanide contraction?

Lanthanoids are characterized by the gradual filling of ______ orbitals.

What are inner transition elements?

What are the conditions for spontaneous and non-spontaneous reactions in terms of free
energy change?

What are rare earth elements?

The most common oxidation state of lanthanoids is ______.

The general formula of 2° and 3° alcohol is:

Amongst the following identify the criterion for a process to be at equilibrium -

1. ΔG < 0
2. ΔG > 0
3. ΔS_total=0
4. ΔS < 0

The equilibrium constant Kp for the reaction,

H_2(g) + I_2(g) → 2HI_(g) is 130 at 510 K. Calculate ΔG^o for the following reaction at the same temperature: 2HI_(g) → H_2(g) + I_2(g) [Given: R = 8.314 J K^-1 mol^-1 ]

Derive the relation between `DeltaG^@`and equilibrium constant (K) for the reaction -

aA_bB ⇌ cC+dD.​

Write chemical reactions involved in Van Arkel method for refining Titanium

Explain the relationship between Gibb's standard energy change of the reaction and equilibrium constant.

The following electronic configuration of elements shows highest oxidation state

Name the radioactive element in lanthanoids.

Give the electronic configuration of europium (Z = 63).

Explain the trend in an Oxidation state of 3d elements.

Give the properties of Lanthanoids.