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(a). Mention the most abundant and least...

(a). Mention the most abundant and least abudant alkaline earth
metal in the earth's crust.
b. Arrange alkaline earth metals in order of decreasing hydration enthalpy.
c. `Ca, Sr` and `Ba` generally form ionic compounds. why?
d. Mention colours of `Ca,Ba` and `Sr` in flame test.

A

`Be`

B

`Mg`

C

`Ca`

D

`Sr`

Text Solution

Verified by Experts

The correct Answer is:
C
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Arrange the following sulphates of alkaline earth metals in order of decreasing thermal stability: BeSO_(4),MgSO_(4),CaSO_(4),SrSO_(4) .

Compare the alkali metals and alkaline earth metals with respect to (a) ionisation enthalpy, (b) basicity of oxides and (c ) solubility of hydroxides.

Why do alkaline earth metals and their compounds impart characteristic colours to the flame?

A : Solubility of alkaline earth metal carbonates decreases down the group. R : Hydration enthalpy decreases down the group whereas lattice enthalpy remain almost constant

Alkali &alkaline earth metals have low ionisation enthalpies and hence exhibit characteristic flame colouration. They have high negative electrode potentials & hence are strong reducing agents. It dissolve in liquid ammonia to give a solution which conducts electricity and act as strong reducing agent. being stronger reducing agent than hydrogen, they are usually prepared by the electrolysis of their fused chlorides. Their oxides are basic and the basic strength increases down the group. The solubility of carbonates and sulphates of alkali and alkaline earth metals show opposite trends. only the carbonates of Li and alkaline earth metals decompose on heating. The bicarbonates of both alkali & alkaline earth metals on heating give carbonates. Which of the following process is used in the extractive metallurgy of sodium?

(a). Which alkaline earth metals do not give characteristic colour to the Bunsen flame? (b). Why alkaline earth metals do not form tripositive ions? (c ). Why alkaline earth metals are diamagnetic, but alkali metals are paramagnetic? (d). Why the first inonisation enthaply pf alkaline earth matals is higher than those of corresponding alkali metals? (e). Why alkaline earth metals are less electropositive than corresponding alkali metals?

Why solubility of alkaline earth metal hydroxides increases from Be(OH)_(2) to Ba(OH)_(2) ?

True or False a. Li is the least electronegative alkali metal. b. Potassium is the most abundant alkail metal in the earth's crust. c. Lithium reacts with nitrogen to form nitride.

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates (b) Carbonates (c) Sulphates.

(a) Why alkaline earth metals are harder, have higer melting ponts and higher densities than the alkali metals? (b). Why the atoms of alkaline earth metals are smaller than the corresponding alkali metals? (c ). Why alkaline earth metals have high electrical and thermal conductivities? (d). What is black ash? (e). Why the variation in physical properties of alkaline earth elements is not as regular as in the case of alkali metals?

CENGAGE CHEMISTRY ENGLISH-S-BLOCK GROUP 2 - ALKALINE EARTH METALS-Exercises Single Correct
  1. Which of the following salt will give a green colour in fire works?

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  2. Which of the following does not contain the true peroxide ion?

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  3. (a). Mention the most abundant and least abudant alkaline earth meta...

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  4. The hydration energy of Mg^(2+) is larger than that of:

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  5. Which of the following alkaline earth metal carbonate is thermally l...

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  6. The basic chartacter of the alkaline earth metal hydroxides is as foll...

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  7. The carbonate of which of the following cation is soluble in water ?

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  8. Which of the following metal is the most difficult to extract from its...

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  9. The most probable reason that the alkaline earth metals give dipositiv...

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  10. The oxidation state of the mst electronegative element in the products...

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  11. Anhydrous MgCl(2) is obatined by heating hydrate salt, MgCl(2).6H(2)O.

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  12. Which of the following is used as an antacid?

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  13. Typical elements is the name given to the elements of

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  14. Assertion : Na(2)SO(4) is soluble in water while BaSO(4) is water inso...

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  15. Mg burns in air to give

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  16. Which of the following is decomposed on heating?

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  17. Two metals X and Y belong to the cond group of periodic table. X forms...

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  18. Which of the follwing forms covalent compound?

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  19. The compounds of alkaline earth metals have the following magnetic...

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  20. For two ionic solids CaO and KI, identify the wrong statement among th...

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