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)

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Elements of Group $1$ are called .

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Important Questions on The s-Block Elements

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The order of stability for the super oxides is

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

On combustion of

Li, Na

and

K

in excess of air, the major oxides formed, respectively, are:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The oxide of potassium that does not exist is

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

A metal on combustion in excess air forms

X

X

upon hydrolysis with water yields

H_{2} O_{2}

and

O_{2}

along with another product. The metal is:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Sodium dissolves in liquid

{NH}_{3}

to give a deep blue solution. This is due to;

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Which of the following liberates

O_{2}

upon hydrolysis?

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Choose the correct order of density of the alkali metals

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The main oxides formed on combustion of Li, Na and K in excess of air are respectively:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is ___ . (Integer answer)
(A)

Li

(B)

Na

(C)

Rb

(D)

Cs

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Identify the weakest oxidizing agent among the following

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

When sodium

(Na)

metal is dissolved in liquid ammonia

({NH}_{3})

, it imparts a blue colour to the solution. This blue coloration is due to:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Dihydrogen is liberated when water reacts with

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The metal mainly used in devising photoelectric cells is :

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The hottest region of Bunsen flame shown in the figure below is:

Question Image

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The metal that forms nitride by reacting directly with

N_{2}

of air is:

Elements of Group 1 are called .

Important Questions on The s-Block Elements

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Elements of Group $1$ are called .