HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Answer the following

Why nobelium is the only actinoid with a +2 oxidation state?

Answer the following

Explain with the help of a balanced chemical equation, why the solution of Ce(IV) is acidic.

Answer the following

What is meant by ‘shielding of electrons’ in an atom?

Answer the following

The atomic number of an element is 90. Is this element diamagnetic or paramagnetic?

Answer the following

What is meant by diamagnetic and paramagnetic? Give one example of diamagnetic and paramagnetic transition metal and lanthanoid metal.

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.