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1
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The density of alkali metals is in the order :

A
$$\mathrm{Na}<\mathrm{K}<\mathrm{Cs}<\mathrm{Rb}$$
B
$$\mathrm{K}<\mathrm{Na}<\mathrm{Rb}<\mathrm{Cs}$$
C
$$\mathrm{K}<\mathrm{Cs}<\mathrm{Na}<\mathrm{Rb}$$
D
$$\mathrm{Na}<\mathrm{Rb}<\mathrm{K}<\mathrm{Cs}$$
2
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

In the given reaction cycle

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - s-Block Elements Question 14 English

X, Y and Z respectively are :

A
$$ \begin{array}{lll} \mathrm{X} & \mathrm{Y} & \mathrm{Z} \\ \mathrm{CaCO}_3 & \mathrm{NaCl} & \mathrm{KCl} \end{array} $$
B
$$ \begin{array}{lcl} \mathrm{X} & \mathrm{Y} & \mathrm{Z} \\ \mathrm{CaO} & \mathrm{NaCl}+\mathrm{CO}_2 & \mathrm{NaCl} \end{array} $$
C
$$ \begin{array}{lll} \mathrm{X} & \mathrm{Y} & \mathrm{Z} \\ \mathrm{CaCO}_3 & \mathrm{NaCl} & \mathrm{HCl} \end{array} $$
D
$$ \begin{array}{ccc} \mathrm{X} & \mathrm{Y} & \mathrm{Z} \\ \mathrm{CaO} & \mathrm{NaCl}+\mathrm{CO}_2 & \mathrm{KCI} \end{array} $$
3
JEE Main 2023 (Online) 11th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Alkali metal from the following with least melting point is :

A
$$\mathrm{Rb}$$
B
$$\mathrm{Na}$$
C
$$\mathrm{K}$$
D
$$\mathrm{Cs}$$
4
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Match List-I with List-II:

List - I List - II
A. K I. Thermonuclear reactions
B. KCl II. Fertilizer
C. KOH III. Sodium potassium pump
D. Li IV. Absorbent of CO$$_2$$

Choose the correct answer from the options given below :

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