Question

Match the pairs correctly: 

Hint:

Matching terms in chemistry often involves recognizing functional groups, molecular formulas, and oxidation states.

Answer 1

Step 1: Understand the pairs.
The matching of pairs is based on chemical and common names of compounds, ions, and structures.

Step 2: Match the pairs.
- (i) Sucrose is a disaccharide and its chemical formula is \( C_{12}H_{22}O_{11} \). - (ii) Aldohexose refers to glucose, a six-carbon sugar with an aldehyde group. - (iii) Mn in the +7 oxidation state is typically seen in permanganates. - (iv) Primary valence refers to the charge associated with an ion, and for many metals, it relates to the negative ions they can form. - (v) R-O-R is the general structure for ethers, where R represents an alkyl group. - (vi) Hoffmann bromide is used in the Hofmann degradation reaction, which produces a primary amine. - (vii) Milk sugar is lactose, a disaccharide composed of glucose and galactose.

Step 3: Conclusion.
The pairs are correctly matched as follows: \[ \text{(i) - } C_{12}H_{22}O_{11}, \text{(ii) - Glucose,} \text{(iii) - +7,} \text{(iv) - Negative ions,} \text{(v) - Ether,} \] \[\text{(vi) - Primary amine,} \text{(vii) - Lactose.}\]