A compound that releases CO2 most easily upon heating is?
1. K2CO3
2. Na2CO3
3. MgCO3
4. CaCO3

Subtopic:  Chemical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |
From NCERT
NEET - 2015
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Which of the following biologically important ions is also a constituent of the sodium pump?

1. Ca2+
2. Mg2+
3. K+
4. Fe2+

Subtopic:  Biological Importance of S Block Elements and & Its Ore |
 88%
From NCERT
NEET - 2015
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Solubility of alkaline earth metal sulphates in water decreases in the sequence:

1. Mg > Ca > Sr >Ba
2. Ca > Sr > Ba > Mg
3. Sr > Ca > Mg > Ba
4. Ba > Mg > Sr > Ca

Subtopic:  Chemical Properties |
 76%
From NCERT
NEET - 2015
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In Castner-Kellner cell for the production of sodium hydroxide:
1. brine is electrolyzed using graphite electrodes
2. molten sodium chloride is electrolysed
3. sodium amalgam is formed at mercury cathode
4. brine is electrolyzed with Pt electrodes
Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 62%
From NCERT
NEET - 2013
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Which one of the following alkali metals forms only the normal oxide M2O on heating in air?

1. Rb

2. K

3. Li

4. Na

Subtopic:  Chemical Properties |
 89%
From NCERT
AIPMT - 2012
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In replacement reaction 

The reaction will be most favorable if M happens to be:

1.  K
2.  Rb
3.  Li
4.  Na

Subtopic:  Reasoning Questions |
 51%
AIPMT - 2012
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 An active ingredient in bleaching powder that aids in the bleaching action is:

1.  CaOCl2

2.  CaO2Cl

3.  CaCl2

4.  CaOCl2

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 73%
From NCERT
AIPMT - 2011
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Match List I with List II for the composition of substances and select the correct answer using the code given below:

List-I   Substances

       List-II  
  Composition

(A) Plaster of paris (i) CaSO4. 2H­O
(B) Epsomite (ii) CaSO4.½H2O
(C) Kieserite (iii) MgSO4.7H2O
(D) Gypsum (iv) MgSO4.H2O
(v) CaSO4

Code :

(A) (B) (C) (D)
1. (iv) (iii) (ii) (i)
2. (iii) (iv) (i) (ii)
3. (ii) (iii) (iv) (i)
4. (i) (ii) (iii) (v)
Subtopic:  Biological Importance of S Block Elements and & Its Ore |
 87%
From NCERT
AIPMT - 2011
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A compound that has higher hydration enthalpy than the lattice enthalpy is: 

1. CaSO4

2. BeSO4

3. BaSO4

4. SrSO4

Subtopic:  Chemical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |
 82%
From NCERT
AIPMT - 2010
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Among the given options, what is the property of the alkaline earth metals that increases with their atomic number?
1. Solubility of their hydroxides in water
2. Solubility of their sulphates in water
3. Ionization energy
4. Electro-negativity

Subtopic:  Chemical Properties |
 73%
From NCERT
AIPMT - 2010
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