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1
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The temperature at which “vapour pressure of the liquid in an open vessel becomes equal to the atmospheric pressure” is called 
1
Melting point  
2
Boiling point 
3
Liquid point 
4
None of the above 
2
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The reaction that occurs on passing carbon dioxide gas through lime water is  
1
CaCO3 + H2O + CO2 → Ca(HCO3)2 
2
Ca(OH)2 + CO2 → CaCO3 + H2O
3
CaO + CO2 → CaCO3
4
CaCl2 + H2O + CO2 → CaCO3 + 2HCl
3
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements is NOT correct ? 
1
Water of crystallization is the fixed number of water molecules present in one formula unit of a salt  
2
The molecular formula of Plaster of Paris is CaSO4:2H2O 
3
Washing soda is used for removing the permanent hardness of water 
4
The atmosphere of Venus is made up of thick white and yellow clouds of sulphuric acid 
4
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following type of medicines is used for treating indigestion ?
1
Analgesic 
2
Antiseptic
3
Antibiotic 
4
Antacid 
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