The number of crystal water in Gypsum, Plaster of Paris and Epsom salt respectively are-

1. 2, 0.5, 7                                             

2. 7, 2, 1

3. 7, 0.5, 2                                             

4. 3, 4, 2

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 84%
From NCERT
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Which of the following statement is false regarding saline hydrides –

1. They conduct electricity in molten state

2. They dissolve in water and liberate H2

3. They are used as reducing agents

4. They are covalent in nature

Subtopic:  Physical Properties |
 71%
From NCERT
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An amphoteric oxide among the following is-

1. CaO                                                     

2. SrO

3. BeO                                                     

4. MgO

Subtopic:  Physical Properties |
 88%
From NCERT
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The incorrect statement among the following regarding Lithium is that-

1. The hydroxide, carbonate and nitrate decompose to give the oxide on heating.

2. It is the most electronegative element of group IA.

3. The hydrogen carbonate cannot be isolated as a stable solid.

4. It forms superoxide.

Subtopic:  Physical Properties |
 81%
From NCERT
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Which one of the following is most stable in ether-

(1) BeCl2                                           

(2) CaCl2

(3) SrCl2                                           

(4) None of these

Subtopic:  Physical Properties |
 75%
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The strongest reducing agent is-

(1) Be                                                   

(2) Mg

(3) Sr                                                   

(4) Ba

Subtopic:  Chemical Properties |
 54%
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The largest value of Ksp among the following is -

1. BeSO4                                           

2. MgSO4

3. CaSO4                                       

4. BaSO4

Subtopic:  Physical Properties |
 63%
From NCERT
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What are αβ and γ in the following equation

αK4FeCN6+β K2CO3+γSheat  Products ?

the products are Fe, CO2, KCNO and KSCN.

(A) 1, 2, 3                                               

(B) 2, 1, 5

(C) 1, 1, 5                                               

(D) 2, 2, 3

Subtopic:  Chemical Properties |
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The correct order of increasing ionic character is –

(1) BeCl2<MgCl2<CaCl2< BaCl2

(2) BeCl2<MgCl2<BaCl2<CaCl2

(3) BeCl2<BaCl2<MgCl<CaCl2

(4) BaCl2<CaCl2<MgCl2<BeCl2

Subtopic:  Physical Properties |
 80%
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The polarising power of Mg is close to that of –

1. Na                                       

2. Cs

3. Li                                         

4. K

Subtopic:  Physical Properties |
 83%
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