Which of the combinations, as shown in the image, is correct?

Which of the structures, as shown in the image, is NOT a possible structure of C₃H₆O?

A part of the structure of a polymer is shown in the image. Which of the following is the monomer of this polymer?

The relative molecular mass of an alkane is 72.0. How many possible structures does it have? 

(Relative atomic masses: H = 1.0, C = 12.0)

The process of the production of polyethene from petroleum is shown in the image. Which of the following combinations is correct?

What is the systematic name of the compound shown in the image?

The diagram shows the set-up for cracking of medicinal paraffin. The first tube of the gas is discarded because

How much oxygen is needed for the complete combustion of 56.0 g of ethene?

(Relative atomic masses: H = 1.0, C = 12.0)

The diagram shows the structure of cyclohexene. It can undergo addition polymerization to form a polymer. Which of the following represents a part of the structure of the polymer?

Which of the combinations about petroleum fractions and their major uses, as shown in the image, is correct?

Which of the following reactions are responsible for the formation of acid rain?

(1) 2NO₂(g) + H₂O(l) → HNO₂(aq) + HNO₃(aq)

(2) SO₂(g) + H₂O(l) ⇌ H₂SO₃(aq)

(3) CO₂(g) + H₂O(l) ⇌ H₂CO₃(aq)

Which of the following alternative energy sources are renewable?

(1) Biomass

(2) Wind power

(3) Nuclear energy

Which of the following compounds are NOT possible products when ethane reacts with chlorine under diffuse sunlight?

(1) CH₃CH₂CH₃

(2) CH₃CH₂CH₂CH₃

(3) CH₃CH₂CH₂CH₂CH₃

Which of the following pairs of compounds CANNOT be distinguished by using bromine (dissolved in an organic solvent)?

(1) Cyclohexane and hexane

(2) Hept-1-ene and hept-2-ene

(3) Polypropene and polystyrene