Crystals of Na2CO3. 10H2O when exposed to air_________________?
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
Na2CO3.10H2O is an efflorescent crystal, so it loses some water of crystallization when exposed to dry air. The crystals therefore become anhydrous or less hydrated while remaining solid. Students may choose c by confusing efflorescence with deliquescence, in which a solid absorbs moisture and liquefies.
Last updated
About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
Practise Solids
357 free Solids 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 14 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
A crystal is made up of _ ?
A crystalline solid differs from an amorphous solid in that a crystalline solid
A malleable solid is one which can be_________________?
A metal sulfate contains 9.87% of M. This sulfate is isomorphous with ZnSO4,.7H2O. Determine the atomic weight of the metal M.
A process used for the Concentration of Ore is________?