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Identify the sequence representing the correct order of ionic mobility in aqueous solution.

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Important Questions on The s-Block Elements

MEDIUM
Consider the following ionization enthalpies of two elements 'A' and 'B'.
 
Element Ionization enthalphy kJ/mol
  1st 2nd 3rd
A 899 1757 14847
B 737 1450 7731


Which of the following statements is correct?
MEDIUM

Match List-I with List-II

 

List - I

(Elements)

 

List - II

(Properties)

(a) Ba (i) Organic solvent soluble compounds
(b) Ca (ii) Outer electronic configuration 6 s2
(c) Li (iii) Oxalate insoluble in water
(d) Na (iv) Formation of very strong monoacidic base

Choose the correct answer from the options given below:

EASY
For alkali metals, which of the following trends is incorrect?
HARD
Choose the correct order of density of the alkali metals
HARD

Given below are two statements: One is labelled as
Assertion A and the other is labelled as Reason R
Assertion A: Sodium is about 30 times as abundant as potassium in the oceans.
Reason R: Potassium is bigger in size than sodium.
In the light of the above statements, choose the correct answer from the options given below

MEDIUM

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Lithium salts are hydrated.
Reason (R) : Lithium has higher polarising power than other alkali metal group members.

In the light of the above statements, choose the most appropriate answer from the options given below :

MEDIUM
Alkali metal from the following with least melting point is
MEDIUM
Identify the weakest oxidizing agent among the following
MEDIUM

Given below are two statements, one is labelled as

Assertion A and the other is labelled as Reason R.

Assertion A : Beryllium has less negative value of reduction potential compared to the other alkaline earth metals

Reason R : Beryllium has large hydration energy due to small size of Be2+but relatively large value of atomisation enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.

MEDIUM
The alkaline earth metal sulphate, which has its hydration enthalpy greater than its lattice energy is
MEDIUM

Identify the correct statements about alkali metals.

A. The order of standard reduction potential (M+ | M) for alkali metal ions is Na > Rb > Li.

B. CsI is highly soluble in water.

C. Lithium carbonate is highly stable to heat.

D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic.

E. All alkali metal hydrides are ionic solids.

Choose the correct answer from the options given below

EASY
Which of the following has the lowest melting point?
EASY
Which one among the following metals is the weakest reducing agent?
EASY

The standard electrode potential of M+/M in aqueous solution does not depend on

EASY
Which of the following alkali metals has the lowest melting point?
MEDIUM

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : The energy required to form Mg2+from Mg is much higher than that required to produce Mg+

Reason R:Mg2+ is small ion and carry more charge than Mg+

In the light of the above statements, choose the correct answer from the options given below.

EASY
Valence shell electronic configuration of fourth element of group- 2 in periodic table is