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A s-block element \( \text{(M)} \) reacts with oxygen to form an oxide of the formula \( \text{MO}_2 \). The oxide is pale yellow in colour and paramagnetic. The element \( \text{(M)} \) is:

What are the products formed in sequence when excess of \( \mathrm{CO_2} \) is passed in slaked lime?

Given below are two statements:
Statement I : None of the alkaline earth metal hydroxides dissolve in alkali.
Statement II : Solubility of alkaline earth metal hydroxides in water increases down the group.
In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two Statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: During the boiling of water having temporary hardness, \( \mathrm{Mg(HCO_3)_2} \) is converted to \( \mathrm{MgCO_3} \).
Reason R: The solubility product of \( \mathrm{Mg(OH)_2} \) is greater than that of \( \mathrm{MgCO_3} \).
In the light of the above statements, choose the most appropriate answer from the options given below:

Match List I and List II

Choose the correct answer from the options given below :

The correct order of conductivity of ions in water is:

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

Match List -I with List II

Choose the correct answer from the options given below:

The oxide that gives \( \mathrm{H_2O_2} \) most readily on treatment with \( \mathrm{H_2O} \) is:

10.

The correct set from the following in which both pairs are in correct order of melting point is:

11.

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 stable.
Reason (R): The thermal stability of the carbonates increases with increasing cationic size.
Choose the most appropriate answer from the options given below:

12.

Match List-I with List-II:

Choose the most appropriate answer from the options given below:

13.

One of the by-products formed during the recovery of \( \mathrm{NH_3} \) from Solvay process is :

14.

Match List I with List II:

List – I (Elements)	List – II (Properties)
(a) Li	(i) Poor water solubility of \( \mathrm{I}^- \) salt
(b) Na	(ii) Most abundant element in cell fluid
(c) K	(iii) Bicarbonate salt used in fire extinguisher
(d) Cs	(iv) Carbonate salt decomposes easily on heating

Choose the correct answer from the options given below:

15.

Choose the correct statement from the following :

16.

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:

17.

The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :

18.

Number of paramagnetic oxides among the following given oxides is: \( \mathrm{Li_2O} \), \( \mathrm{CaO} \), \( \mathrm{Na_2O_2} \), \( \mathrm{KO_2} \), \( \mathrm{MgO} \) and \( \mathrm{K_2O} \)

19.

Match List-I with List-II:

Choose the correct answer from the options given below:

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JEE Main 2021 27th August Morning Shift

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

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JEE Mains | PYQ