Which of the following statements are true about carbohydrates? (i) Monosaccharides can be hydrolysed. (ii) The two monosaccharide units obtained on hydrolysis of a disaccharide can either be same or different. (iii) Polysaccharides are now sweet in taste. (iv) All monosaccharides are not reducing. sugars.

Step-by-step solution

(i) Monosaccharides are smallest carbohydrates that cannot be hydrolysed. So, statement (i) is not true. (ii) Disaccharides are made up of two units of monosaccharides, so their hydrolysis will also give two monosaccharide unit that can be same or different. e.g., Sucrose Glucose + Fructose Maltose Glucose + Glucose So, statement (ii) is true. (iii) Polysaccharides are polymers of many monosaccharides and have no sweet taste. So, statements (iii) is true. (iv) Monosaccharides are categorised as reducing and non-red