Crystals of Na2CO2.H2Owhen exposed to
Correct answer: A. Lose water and remain solid
- A. Lose water and remain solid
- B. Gain water and remain solid
- C. Gain water and become liquid
- D. Remains unchanged
Explanation
Sodium carbonate monohydrate (Na2CO3.H2O) is a hygroscopic compound, meaning it readily absorbs moisture from the air.However, it loses its water molecule at room temperature when exposed to dry air, leaving behind anhydrous sodium carbonate (Na2CO3) as a fine white powder. This process does not involve changing into a liquid state.Therefore, option (a) accurately describes the behavior of Na2CO3.H2O crystals upon exposure to air.
Last updated
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2NaOH(aq) + Cl2(g) → NaCl + NaClO + H2O proceed at:
A compound 'X' on heating gives a colourless gas. The residue is dissolved in water to produce 'Y'. When CO₂ is passed through the aqueous solution of 'Y', it produces 'Z', which on gentle heating gives back 'X'. Compound 'X' is:
A elements are named as alkali metals because
A gas which burn with blue flame is:
A gas which burns with a blue flame is