Which of the following mixtures is NOT homogeneous?
Oil and water
A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has visibly separate parts.
Oil does not dissolve in water; it forms a separate layer on top, so oil and water is a heterogeneous mixture.
Vinegar (acetic acid in water), salt water (salt dissolved in water) and air (a uniform mixture of gases) all have uniform composition and are homogeneous.
Hence, the answer is oil and water.
Similar Questions
What happens when acid is dissolved in water?
The molecular mass of carbon dioxide is:
A sample of brass is melted and poured into a mold to make a musical instrument. Which of the following correctly explains why brass is classified as a homogeneous mixture?
Who was the first scientist to use the term 'element'?
Match the compound to its respective mass ratio by elements from the table given below.
Compound Mass Ratio by Elements 1. Water (H2O) A. 1 : 8 2. Carbon dioxide (CO2) B. 14 : 3 3. Ammonia (NH3) C. 3 : 8 4. Sulphur dioxide (SO2) D. 1 : 1 If hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), which ions from each reactant participate in forming water?
Which of the following most accurately represents a heterogeneous mixture?
Among the following, what has a molecular mass of 44 u?
When 16 g of oxygen is combined with 2 g of hydrogen, 18 g water is formed. This observation is in accordance with:
Methyl orange turns red in:
Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
The volume of CO 2liberated at STP when 10 gm of 90% pure limestone strongly heated is
