Refined sugar

 Sucrose is a common sugar. It is a disaccharide, a molecule composed of two monosaccharide units ie glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined. It has a molecular formula C₁₂H₂₂O₁₁.‌Refined sugar is made by extracting and processing the sugar naturally found in foods like corn, sugar beets, and sugar cane. This refined sugar is then added to foods for various purposes, such as to boost flavor.

Refined sugar is harmful for health. Children are very fond of ice cream, cold drinks, chocolates, and sweets, etc. which contain refined sugar. Higher intake of refined sugar forms acid in mouth which reacts with calcium phosphate present in enamel and tooth decay starts. These days children have lots of cavities. Lots of people are suffering from diabetes.

Q10.1 The chemical compound present in cane sugar is

     a.      Sucrose

     b.      Glucose

     c.       Fructose

     d.      Lactose

 Q10.2 The molecular mass of sucrose is

     a.      352 u

     b.      342 u

     c.       364 u

     d.      326 u

     Q10.3 If 3.42 gm of sucrose is dissolved in 18gm of water in a beaker. Estimate the number of oxygen atoms in the beaker.

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Q10.4How much do you agree with the following statement?

 

		Strongly Agree	Agree	Disagree	Strongly disagree
a	Refined sugar is the only cause of tooth decay
b	One should always have sugar free diet

Answer Marking Scheme

10.1. Full  credit :2 if response is a  as Sucrose is produced naturally in plants

          No credit :0 if response is b, c, d

10.2). Full  credit :2 if response is b as sucrose has a molecular formula C₁₂H₂₂O₁₁;12 x 12+22 x 1 + 11 x 6 = 342

          No credit :0 if response is a, c, d

10.3) . Full  credit :2 if response is 6.68 x 10²³ :0.01mole of sucrose contains 11 x 6.022 x 10²³ = 6.6242 x 10²² oxygen

    Total oxygen in solution =(6.022+.662) x 10²³ =6.684 x 10²³

    Partial credit :1 for correct formula

        No credit :0 for wrongly calculated

10.4 (a) Full  credit:2 if response is strongly disagree

             Partial credit :1 if response disagree

             No credit :0 other response or missing

   (b)   Full  credit :2 if response is strongly disagree

Partial credit :1 if response disagree

                      No credit :0 other response or missing