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11th Chemistry Monthly Test - 1 ( Alkali and Alkaline Earth Metals)

MABS Institution

11th Chemistry Monthly Test - 1 ( Alkali and Alkaline Earth Metals)-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The second ionization enthalpy of alkali metals is ________

Zero
low
high
very low

Statement-I: Cesium is considered as the most electropositive element.
Statement-Il: Due to its lowest ionization energy, cesium is considered as the most electropositive element.

Statements-I and II are correct and statement-II is the correct explanation of statement-I.
Statements- I and II are correct but statement-II is not the correct explanation of statement- I.
Statement-I is correct but statement-II is wrong.
Statement-I is wrong but statement-II is correct.

The general electronic configuration of alkali metals is ____________

[noble gas] ns²
[noble gas] ns¹
ns² np⁶
ns² (n-1)d^1-10

Which metal is used in making electrochemical cells?

Caesium
Lithium
Calcium
Barium

Consider the following statements.
(i) Gypsum is used in making surgical and orthopedic casts.
(ii) Calcium nitrate acts a coagulator in making tofu.
(iii) Gypsum plays an important role in soap making.
Which of the above statements is/are not correct.

(i) only
(ii) and (iii)
(i) and (iii)
(ii) only

Which one of the following is used in fire extinguishers?

Washing soda
Soda ash
Baking soda
Caustic soda

Among the following the least thermally stable is

K₂CO₃
Na₂CO₃
BaCO₃
Li₂CO₃

Which one of the following is known as natural insulator?

FeSO₄·7H₂O
Na₂CO₃10H₂O
CaSO₄.2H₂O
CaSO₄.1/2H₂O

Which is used to treat upset stomach and eczema?

MgSO₄·7H₂O
FeSO₄·7H₂O
CaSO₄.2H₂O
2CaSO₄.H₂O

Statement-I: BeCl₂ is soluble in organic solvent.
Statement-II: Since BeCl₂ is a covalent compound, it is soluble in organic solvent.

Statements-I and II are correct and statement-II is the correct explanation of statement-I.
Statements-I and II are correct but statement-II is not the correct explanation of statement-I.
Statement-I is wrong but statement-II is correct.
Statement-I is correct but statement-II is wrong.

Part - B

Generic 2 - Answer All Question

Prove that calcium oxide is a basic oxide

Explain the use of gypsum in agriculture.

Why lithium has anomalous behaviour than other elements in the same group?

Why alkaline earth metals are harder than alkali metals.
Mention the uses of sodium chloride.

How is plaster of paris prepared?

Which is more readily formed CSCI or NaCl, by the reaction of metal with chlorine? Explain.

What is meant by setting of cement?

Why alkali metals and alkaline earth metals are called s-block elements?

Lithium halides are covalent. Explain.

Part - C

Generic 3 - Answer All Question

Why table salt becomes wet when kept in open space?

Explain:
(i) Ionisation enthalpy of alkaline earth metals are low compared to 'p' block elements.
(ii) Ionisation enthalpy decreases down the group.
(iii) Ionisation enthalpy of group 2 elements are higher than that of group 1 elements.

Why is the behaviour of beryllium is different from the other elements of the same group?

What happens when (i) Magnesium is burnt in air (ii) Quick lime is treated with silica (iii) Chlorine reacts with slaked lime.

BeSO₄ is soluble in water whereas BaSO₄ is not Why?
Write two uses of NaCI.

Write about the important uses of calcium

What are the uses of Radium?

Why does beryllium form BeCI₂ although it has no unpaired electrons?

Explain the Castner-Kellner process of manufacturing sodium hydroxide.

Part - D

Generic 5 - Answer All Question

Describe the method of electrolysis of brine solution?

List out the uses of alkali metals

State as to why
(a) Alkali metals show only +1 oxidation state.
(b) Na and K impart colour to the flame but Mg does not.
(c) Lithium on being heated in air mainly forms the monoxide and not the peroxide.
(d) Li is the best reducing agent in aqueous solution

How is sodium hydroxide prepared commercially from brine solution?

An element belongs to group 1 and period 3 reacts with chlorine gas to form A. (A) reacts with ammonium bicarbonate to give compounds (B) and (C). Compound (B) is then heated to give compound (D). Identify A, B, C and D and write the respective equations.

Describe the biological importance of sodium and potassium.

The hydrides of alkali metals behave as strong reducing agents - Justify the statement.
An element occupies group number 1 and period number 3. This element when exposed to air gives compound (A). The element with water forms compound (B). Which is a strong base and (A) with ammonia gives compound (C) which is used as a reducing agent in organic chemistry? The element reacts with a halogen and forms cooking salt (D). Identify A, B, C and D

Explain the important common features of Group 2 elements.

Explain in what respects lithium is different from other metals of the same group.

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