Which of the following order is correct?

1. K+<Ca2+<p3-<S2-: Ionic size

2. Naaq.+>Kaq.+>Rbaq.+>Csaq.+: Electrical conductance

3. Alaq.3+>Mgaq.2+>Naaq.+: Hydrated size

4. Iaq.-<Braq.-<Claq.-<Faq.-: Ionic mobility

Subtopic:  Physical Properties |
 59%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Compound having lowest melting point:

(1) LiCl                               

(2) CsCl

(3) RbCl                               

(4) KCl

Subtopic:  Physical Properties |
 53%
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Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false.

(I) Numbers of SS bonds in H2SnO6 are (n+1)
(II) When F2 reacts with water gives HF, O2 and O3
(III) LiNO3 and BaCl2 compounds are used in fire works 
(IV) Be and Mg are ionic and polymeric

(a)FTTF                (b) FTTT              (c) TFTT                 (d) TTFF

Subtopic:  Preparations, Properties & Uses of S Block Elements |
 50%
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statements is true for all the alkali metals?

(1) Their nitrate decomposes on heating to give the corresponding nitrites and oxygen.

(2) Their chlorides are deliquescent and crystallize as hydrates.

(3) They react with water to form hydroxide and hydrogen.

(4) They readily react with halogens to form ionic halides. M+X-.

Subtopic:  Preparations, Properties & Uses of S Block Elements |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statements is not true about the dilute solutions of alkali metals in liquid ammonia?

1. They are deep blue coloured solutions.

2. They are highly conducting in nature.

3. They are diamagnetic in nature.

4. Ammoniated cations and ammoniated anions are formed in a solution.

Subtopic:  Preparations, Properties & Uses of S Block Elements |
 77%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Which is not correctly matched?

(1) Basic strength of oxides                                 Cs2O<Rb2O<K2O<Na2O<LiO2

(2) Stability of peroxides                                      Na2O <K2O2<Rb2O2<Cs2O2

(3) Stability of bicarbonate                                   LiHCO3<NaHCO3<KHCO3<RbHCO3<Cs HCO3

(4) Melting Point                                                  NaF<NaCl<NaBr<Nal

 

(A) 1 and 4                                           

(B) 1 and 3

(C) 1 and 2                                           

(D) 2 and 3

Subtopic:  Chemical Properties |
 65%
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In manufacture of sodium carbonate from Solvay (or ammonia-soda) process the raw material used is :

(1) NaOH                                             

(2) Na2SO4

(3) NaCl                                               

(4) NaHCO3

Subtopic:  Preparations, Properties & Uses of S Block Elements |
 61%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following reactions of potassium superoxide supply oxygen gas in the breathing equipments used in space and submarines?

(1) Reaction of superoxide with nitrogen in the exhaled air.

(2) Reaction of superoxide with moisture in the exhaled air.

(3) Reaction of superoxide with carbon dioxide in the exhaled air

 

(1) (1), (2) and (3)                                       

(2) (2) and (3) only

(3) (2) only                                                 

(4) (1) and (2) only

Subtopic:  Chemical Properties |
 60%
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Which of the following acts as an oxidizing as well as a reducing agent?

(1) Na2O                                     

(2) NaO3

(3) NaNO                                     

(4) NaNO2

Subtopic:  Chemical Properties |
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Alkaline earth metal nitrates on heating decompose to give:

(1) MNO22 and O2 only                                   

(2) MO, N2 and O2

(3) MO, NO2 and O2                                         

(4) MO and NO2 only

Subtopic:  Chemical Properties |
 67%
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NEET 2023 - Target Batch - Aryan Raj Singh