Match List - I with List - II. List-I (Salt) List-II (Flame colour wavelength) (a) LiCl (i) 455 . 5 nm (b) NaCl (ii) 670 . 8 nm (c) RbCl (iii) 780 . 0 nm (d) CsCl (iv) 589 . 2 nm Choose the correct answer from the options given below:

(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

Match List-I with Match List-II List-I (Metal) List-II (Emitted light wavelength nm ) (A) Li (I) 670 . 8 (B) Na (II) 589 . 2 (C) Rb (III) 780 . 0 (D) Cs (V) 455 . 5 Choose the most appropriate answer from the options given below

A - I , B - II , C - III , D - IV

A - III , B - II , C - I , D - IV

A - III , B - I , C - II , D - IV

A - IV , B - II , C - I , D - III

MEDIUM

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Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

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Important Questions on The s-Block Elements

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Match List - I with List - II.

List-I (Salt)		List-II (Flame colour wavelength)
(a)	$LiCl$	(i)	$455.5 nm$
(b)	$NaCl$	(ii)	$670.8 nm$
(c)	$RbCl$	(iii)	$780.0 nm$
(d)	$CsCl$	(iv)	$589.2 nm$

Choose the correct answer from the options given below:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

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

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Which one of the following oxide dissolves in both hydrochloric acid and sodium hydroxide?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

What is the colour of the flame on heating potassium in the flame of a Bunsen burner?

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The correct order of hydration enthalpies of alkali metal ions is:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason $R$ . Assertion $A$ : $LiF$ is sparingly soluble in water. Reason $R$ : The ionic radius of ${Li}^{+}$ ion is smallest among its group members, hence has least hydration enthalpy.

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

For alkali metals, which of the following trends is incorrect?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Which of the following metal is the most abundant in the earth's crust?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The correct order of electrical conductivity of alkali metals ions in their aqueous solution for

{Cs}^{+}, K^{+}, {Na}^{+}

and

L^{+}

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The correct order of conductivity of ions in water is:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The ionic species having the largest size is

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The correct order of hydration enthalpy is

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Match List-I with Match List-II

	List-I (Metal)		List-II (Emitted light wavelength $(nm)$ )
(A)	$Li$	(I)	$670.8$
(B)	$Na$	(II)	$589.2$
(C)	$Rb$	(III)	$780.0$
(D)	$Cs$	(V)	$455.5$

Choose the most appropriate answer from the options given below

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Choose the correct order of density of the alkali metals

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Which of the following statement is incorrect?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Given below are two statements: One is labelled as Assertion $A$ and the other labelled as Reason $R .$
Assertion $A$ : Lithium halides are some what covalent in nature.

Reason $R$ : Lithium possess high polarisation capability.

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

Which of the following alkali metal ion in aqueous solution is the best conductor of electricity?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>General Introduction of Group 1 Elements

The correct order of mobility of alkali metal ions in aqueous solution is-

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

Important Questions on The s-Block Elements

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