Quantrex Academy Quantrex AcademyPYQs with solutions · JEE · NEET · NDA

Home · JEE Main & Advanced · Chemistry · s Block Elements

s Block Elements — JEE Main & Advanced Chemistry PYQs

275 previous year questions from s Block Elements with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

275 questionsChemistrySolutions on every page
1

First and second ionization enthalpies of lithium are 520 kJ mol ⁻¹ and 7297 kJ mol ⁻¹ respectively. Energy required to convert 3.5 mg lithium (g) into Li ²⁺ (g) [ Li(g) Li ²⁺ (g)

JEE Main 2026 Solution View → 2

The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is:

JEE Main 2026 Solution View → 3

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R : Assertion (A) : BeCl 2 and MgCl 2 produce characteristic flame Reason (R) : T

JEE Main 2023 Solution View → 4

Be ( OH ) 2 reacts with Sr ( OH ) 2 to yield an ionic salt. Choose the incorrect option related to this reaction from the following

JEE Main 2023 Solution View → 5

In the given reaction cycle X , Y and Z respectively are

JEE Main 2023 Solution View → 6

The density of alkali metals is in the order

JEE Main 2023 Solution View → 7

Alkali metal from the following with least melting point is

JEE Main 2023 Solution View → 8

Mg NO 3 2 . XH 2 O and Ba NO 3 2 . YH 2 O , represent formula of the crystalline forms of nitrate salts. Sum of X and Y is.......

JEE Main 2023 Solution View → 9

Match List-I with List-II: List-I List-II A. K I. Thermonuclear reactions B. KCI II. Fertilizer C. KOH III. Sodium potassium pump D. Li IV. Absorbent of CO 2

JEE Main 2023 Solution View → 10

Number of water molecules in washing soda and soda ash respectively are :

JEE Main 2023 Solution View → 11

Lime reacts exothermally with water to give ‘ A ’ which has low solubility in water. Aqueous solution of ‘ A ’ is often used for the test of CO 2 , a test i

JEE Main 2023 Solution View → 12

In the following reaction, the total number of oxygen atoms in X and Y is______ Na 2 O + H 2 O → 2 X Cl 2 O 7 + H 2 O → 2 Y

JEE Main 2023 Solution View → 13

For a good quality cement, the ratio of lime to the total of the oxides of Si , Al and Fe should be as close as to

JEE Main 2023 Solution View → 14

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Sodium is about 30 times as abundant as potassium in the oceans.

JEE Main 2023 Solution View → 15

Given below are two statements : Statement I : Lithium and Magnesium do not form superoxide Statement II : The ionic radius of Li + is larger than ionic radius of Mg 2 + In the lig

JEE Main 2023 Solution View → 16

What is the purpose of adding gypsum to cement?

JEE Main 2023 Solution View → 17

Ion having highest hydration enthalpy among the given alkaline earth metal ions is:

JEE Main 2023 Solution View → 18

The setting time of Cement is increased by adding

JEE Main 2023 Solution View → 19

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Gypsum is used for making fireproof wall boards. Reason (R

JEE Main 2023 Solution View → 20

Match List I with List II (A) Slaked lime (I) NaOH (B) Dead burnt plaster (II) Ca ( OH ) 2 (C) Caustic soda (III) Na 2 CO 3 · 10 H 2 O (D) Washing soda (IV) CaSO 4 Choose the

JEE Main 2023 Solution View → 21

Choose the correct statement(s): A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere of CO 2 . C. Beryllium sulphate is readily soluble

JEE Main 2023 Solution View → 22

The element playing significant role in neuromuscular function and interneuronal transmission is :

JEE Main 2023 Solution View → 23

The number of alkali metal(s), from Li ,   K ,   Cs ,   Rb having ionization enthalpy greater than 400   kJ   mol - 1 and forming stable super oxide is

JEE Main 2023 Solution View → 24

Chlorides of which metal are soluble in organic solvents:

JEE Main 2023 Solution View → 25

Which of the following reaction is correct?

JEE Main 2023 Solution View → 26

The alkaline earth metal sulphate(s) which are readily soluble in water is/are: (A) BeSO 4 (B) MgSO 4 (C) CaSO 4 (D) SrSO 4 (E) BaSO 4 Choose the correct answer from the options gi

JEE Main 2023 Solution View → 27

Lithium aluminium hydride can be prepared from the reaction of

JEE Main 2023 Solution View → 28

On heating, LiNO 3 gives how many compounds among the following? Li 2 O , N 2 , O 2 , LiNO 2 , NO 2

JEE Main 2023 Solution View → 29

The magnetic behaviour of Li 2 O , Na 2 O 2 and KO 2 , respectively, are

JEE Main 2023 Solution View → 30

The correct order of hydration enthalpies is (A) K + (B) Rb + (C) Mg 2 + (D) Cs + (E) Ca 2 + Choose the correct answer from the options given below:

JEE Main 2023 Solution View → 31

Match List I with List II List I List II A. Cobalt catalyst I. H 2 + Cl 2 production B. Syngas II. Water gas production C. Nickel catalyst III. Coal gasification D. Brine solution

JEE Main 2023 Solution View → 32

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A:- The alkali metals and their salts impart characteristic colour to

JEE Main 2023 Solution View → 33

Which one among the following metals is the weakest reducing agent?

JEE Main 2023 Solution View → 34

Which of the following represents the correct order of metallic character of the given elements?

JEE Main 2023 Solution View → 35

Match List I with List II List I List II Elements Colour imparted to the flame A K I Brick Red B Ca II Violet C Sr III Apple Green D Ba IV Crimson Red Choose the correct answer fro

JEE Main 2023 Solution View → 36

Identify the correct statements about alkali metals. A. The order of standard reduction potential ( M + | M ) for alkali metal ions is Na > Rb > Li . B. CsI is highly solub

JEE Main 2023 Solution View → 37

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Beryllium has less negative value of reduction potential compar

JEE Main 2023 Solution View → 38

The number of s-electrons present in an ion with 55 protons in its unipositive state is

JEE Main 2023 Solution View → 39

Match Column I with Column II Column I Column II A Soda ash I CaSO 4 B Chlorophyll II Ca OH 2 C Used in Whitewashing III Na 2 CO 3 D Dentistry, ornamental work IV Mg 2 + ions

JEE Main 2023 Solution View → 40

Reaction of BeO with ammonia and hydrogen fluoride gives ' A ' which on thermal decomposition gives BeF 2 and NH 4 F . What is ' A ' ?

JEE Main 2023 Solution View → 41

Portland cement contains ' X ' to enhance the setting time. What is ' X '?

JEE Main 2022 Solution View → 42

Lithium nitrate and sodium nitrate, when heated separately, respectively, give

JEE Main 2022 Solution View → 43

Statement I: An alloy of lithium and magnesium is used to make aircraft plates. Statement II : The magnesium ions are important for cell-membrane integrity. In the light the above

JEE Main 2022 Solution View → 44

Which of the following statements is incorrect?

JEE Main 2022 Solution View → 45

An element A of group 1 shows similarity to an element B belonging to group 2 . If A has maximum hydration enthalpy in group 1 then B is

JEE Main 2022 Solution View → 46

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

JEE Main 2022 Solution View → 47

Reaction of BeCl 2 with LiAlH 4 gives : (A) AlCl 3 (B) BeH 2 (C) LiH (D) LiCl (E) BeAlH 4 Choose the correct answer from options given below

JEE Main 2022 Solution View → 48

The correct order of density is

JEE Main 2022 Solution View → 49

Choose the correct order of density of the alkali metals

JEE Main 2022 Solution View → 50

Amongst baking soda, caustic soda and washing soda carbonate anion is present in :

JEE Main 2022 Solution View → 51

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

JEE Main 2022 Solution View → 52

Among the following, basic oxide is

JEE Main 2022 Solution View → 53

BeO reacts with HF in presence of ammonia to give A which on thermal decomposition produces B and ammonium fluoride. Oxidation state of Be in A is

JEE Main 2022 Solution View → 54

Addition of H 2 SO 4 to BaO 2 produces

JEE Main 2022 Solution View → 55

BeCl 2 reacts with LiAlH 4 to give

JEE Main 2022 Solution View → 56

s-block element which cannot be qualitatively confirmed by the flame test is

JEE Main 2022 Solution View → 57

The correct order of melting point is

JEE Main 2022 Solution View → 58

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

JEE Main 2022 Solution View → 59

Which one of the following compounds is used as a chemical in certain type of fire extinguishers

JEE Main 2022 Solution View → 60

Which of the following statements are correct ? (A) Both LiCl and MgCl 2 are soluble in ethanol. (B) The oxides Li 2 O and MgO combine with excess of oxygen to give superoxide. (C)

JEE Main 2022 Solution View → 61

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 highe

JEE Main 2021 Solution View → 62

The major component/ingredient of Portland Cement is :

JEE Main 2021 Solution View → 63

The oxide that gives H 2 O 2 most readily on treatment with H 2 O is :

JEE Main 2021 Solution View → 64

Choose the correct statement from the following :

JEE Main 2021 Solution View → 65

The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are:

JEE Main 2021 Solution View → 66

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Barium carbonate is insoluble in water and is highly stabl

JEE Main 2021 Solution View → 67

What are the products formed in sequence when excess of CO 2 is passed in slaked lime?

JEE Main 2021 Solution View → 68

Match List - I with List II : List-I List-II a Li i photoelectric cell b Na ii absorbent of CO 2 c K iii coolant in fast breeder nuclear reactor d Cs iv treatment of cancer v beari

JEE Main 2021 Solution View → 69

Match List I with List II : List-I Elements List-II Properties (a) Li (i) Poor water solubility of I - salt (b) Na (ii) Most abundant element in cell fluid (c) K (iii) Bicarbonate

JEE Main 2021 Solution View → 70

Given below are two statements: Statement I : None of the alkaline earth metal hydroxides dissolve in alkali. Srtatement II : Solubility of alkaline earth metal hydroxides in water

JEE Main 2021 Solution View → 71

Match List-I with List-II List - I (Elements) List - II (Properties) (a) Ba ( i ) Organic solvent soluble compounds (b) Ca ( ii ) Outer electronic configuration 6 s 2 (c) Li ( iii

JEE Main 2021 Solution View → 72

Metallic sodium does not react normally with:

JEE Main 2021 Solution View → 73

A s-block element (M) reacts with oxygen to form an oxide of the formula MO 2 . The oxide is pale yellow in colour and paramagnetic. The element ( M ) is:

JEE Main 2021 Solution View → 74

Match list-I with list-II : (a) Be (i) Treatment of cancer (b) Mg (ii) Extraction of metals (c) Ca (iii) Incendiary bombs and signals (d) Ra (iv) Windows of X-ray tubes (v) Bearing

JEE Main 2021 Solution View → 75

Match List - I with List - II List - I List - II (a) Ca ( OCl ) 2 (i) Antacid (b) CaSO 4 · 1 2 H 2 O (ii) Cement (c) CaO (iii) Bleach (d) CaCO 3 (iv) Plaster of paris Choose t

JEE Main 2021 Solution View → 76

The set of elements that differ in mutual relationship from those of the other sets is:

JEE Main 2021 Solution View → 77

One of the by-products formed during the recovery of NH 3 from Solvay process is:

JEE Main 2021 Solution View → 78

The correct order of conductivity of ions in water is:

JEE Main 2021 Solution View → 79

Given below are two statements: Statement I : Both CaCl 2 . 6 H 2 O and MgCl 2 . 8 H 2 O undergo dehydration on heating. Statement II : BeO is amphoteric, whereas the oxides of oth

JEE Main 2021 Solution View → 80

Find A , B and C in the following reactions: NH 3 + A + CO 2 → NH 4 2 CO 3 NH 4 2 CO 3 + H 2 O + B → NH 4 HCO 3 NH 4 HCO 3 + NaCl → NH 4 Cl + C

JEE Main 2021 Solution View → 81

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

JEE Main 2021 Solution View → 82

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 C

JEE Main 2021 Solution View → 83

Number of amphoteric compounds among the following is (A) BeO (B) BaO (C) Be OH 2 (D) Sr OH 2

JEE Main 2021 Solution View → 84

Which of the following liberates O 2 upon hydrolysis?

JEE Advanced 2020 Solution View → 85

Match the following compounds (Column-I) with their uses (Column-II) S. No. Column-I S.No. Column-II (I) Ca OH 2 (A) casts of statues (II) NaCl (B) white wash (III) CaSO 4 · 1

JEE Main 2020 Solution View → 86

Among the sulphates of alkaline earth metals, the solubilities of BeSO 4 and MgSO 4 in water, respectively, are :

JEE Main 2020 Solution View → 87

An alkaline earth metal ' M ' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure.

JEE Main 2020 Solution View → 88

On combustion of Li , Na and K in excess of air, the major oxides formed, respectively, are:

JEE Main 2020 Solution View → 89

Among the statement (I – IV), the correct ones are: (I) Be has smaller atomic radius compared to Mg. (II) Be has higher ionization enthalpy than AI. (III) Charge/radius ratio

JEE Main 2020 Solution View → 90

Two elements A and B have similar chemical properties. They don't form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B , respectively, are :

JEE Main 2020 Solution View → 91

The metal mainly used in devising photoelectric cells is :

JEE Main 2020 Solution View → 92

Among the statements a - d , the correct ones are: ( a ) Lithium has the highest hydration enthalpy among the alkali metals. ( b ) Lithium chloride is insoluble in pyridine. ( c )

JEE Main 2020 Solution View → 93

The radius of the second Bohr orbit, in terms of the Bohr radius, a 0 , in Li 2 + is:

JEE Main 2020 Solution View → 94

When gypsum is heated to 393 K , it forms:

JEE Main 2020 Solution View → 95

Which of the following does not illustrate the anomalous properties of lithium?

NTA Abhyas JEE Main 2020 Solution View → 96

Alkali metals act as

NTA Abhyas JEE Main 2020 Solution View → 97

Which one of the following pairs of substances on reaction will not evolve H 2 gas?

NTA Abhyas JEE Main 2020 Solution View → 98

The carbonate of which of the following cation is insoluble in water?

NTA Abhyas JEE Main 2020 Solution View → 99

Washing soda is Na 2 CO 3 · x H 2 O . The value of ' x ' is ______.

NTA Abhyas JEE Main 2020 Solution View → 100

In curing cement plasters water is sprinkled from time to time. This helps in

NTA Abhyas JEE Main 2020 Solution View → 101

What is the product of the reaction of H 2 O 2 With C l 2 ?

NTA Abhyas JEE Main 2020 Solution View → 102

How many of the following nitrates of metal ‘M’ decompose on heating similar to as given below in the scheme? (where; M = L i , B e , M g , K , Ca, S r , N a , R b , B a ) Metal ni

NTA Abhyas JEE Main 2020 Solution View → 103

N a O C l is used as a bleaching agent and sterilising agent. It can be synthesised by the action of

NTA Abhyas JEE Main 2020 Solution View → 104

How many of the following metals can be detected in the laboratory through flame test i) B e ii) M g iii) Na iv) K v) B a

NTA Abhyas JEE Main 2020 Solution View → 105

The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO 2 is bubbled through aqueous solution of B, C is formed which is

NTA Abhyas JEE Main 2020 Solution View → 106

Which one of the following cannot be prepared from B 2 H 6 ?

NTA Abhyas JEE Main 2020 Solution View → 107

Which pair of the following chlorides do not impart colour to the flame?

NTA Abhyas JEE Main 2020 Solution View → 108

Which of the following represents the incorrect order of properties?

NTA Abhyas JEE Main 2020 Solution View → 109

Match the reactions given in column (I) with process/products in column (II) and select the proper code of choice from the choices given at the end. (I) (II) (A) NaCl(aq) → Na + +C

NTA Abhyas JEE Main 2020 Solution View → 110

Which of the following statements is incorrect for hydrogen peroxide?

NTA Abhyas JEE Main 2020 Solution View → 111

In the reaction: Zn + NaNO 3 + NaOH → Na 2 ZnO 2 + A + H 2 O The sum of stoichiometric coefficients of Z n and A in the balanced reaction with simplest integer coefficient is

NTA Abhyas JEE Main 2020 Solution View → 112

Least stable peroxide among the following:

NTA Abhyas JEE Main 2020 Solution View → 113

Potassium ozonide on decomposition gives

NTA Abhyas JEE Main 2020 Solution View → 114

Li 3 N + H 2 O → A gas Li 2 CO 3 → Δ B gas Hybridisation of the central atom in A and B respectively.

NTA Abhyas JEE Main 2020 Solution View → 115

N a N O 3 → Δ A g a s + B A + H C l → C u C l 2 C g a s + H 2 O Colour of C and A are respectively.

NTA Abhyas JEE Main 2020 Solution View → 116

Lithium hydride reacts with aluminium chloride to form a complex. The geometry of the complex and the ligand present in the complex is

NTA Abhyas JEE Main 2020 Solution View → 117

Which of the following ions have maximum hydration energy?

NTA Abhyas JEE Main 2020 Solution View → 118

Total number of elements which do not form hydrides are M o , C a , F e , P d , C o , R u , W , C r

NTA Abhyas JEE Main 2020 Solution View → 119

Peroxide ion is present in:

NTA Abhyas JEE Main 2020 Solution View → 120

Hydrogen peroxide oxidises thiosulphate ion to:-

NTA Abhyas JEE Main 2020 Solution View →
Practice all s Block Elements questions in the app →