NCERT Solutions For Class 12 Chemistry Chapter 14: This particular chapter of NCERT on Biomolecules teaches that a system grows, sustains, and reproduces itself. The most amazing thing about a living system is that it is composed of non-living atoms and molecules. The pursuit of knowledge of what goes on chemically within a living system falls in the domain of biochemistry. To understand the living system, it is crucial to understand the biological and molecular life processes. So, this chapter holds a crucial level of importance. Therefore, these NCERT Solutions For Class 12 Chemistry Chapter 14 will be useful to students.
The CBSE Class 12 Chemistry Chapter 14 teaches that Carbohydrates are primarily produced by plants and form a huge group of naturally occurring organic compounds. Some common examples are cane sugar, glucose, starch, etc. Most of them have a general formula and were considered hydrates of carbon from where the name carbohydrate was derived. Carbohydrates are classified based on their behavior in hydrolysis. This is an important chapter, and solving the NCERT Class 12 questions will further clear your doubts regarding the topics covered in the chapter. Therefore, we will provide you with all the NCERT Solutions for Class 12 Chemistry Chapter 14 in this article.
NCERT Solutions for Class 12 Chemistry Chapter 14: Biomolecules
The topics and sub-topics of NCERT Class 12 Chemistry Chapter 14 Biomolecules are listed below:
Now let us move towards the brief description of Class 12 Chemistry Chapter 14.
Chapter Description of Class 12 Chemistry Chapter 14 – Biomolecules
Class 12 Chemistry Chapter 14 Biomolecules teaches that a carbohydrate that cannot be hydrolyzed further to give a simpler polyhydroxy aldehyde or ketone unit is called a monosaccharide. About 20 monosaccharides are known to occur in nature.
Carbohydrates that yield two to ten monosaccharide units on hydrolysis are called oligosaccharides. They are further classified as disaccharides, trisaccharides, tetrasaccharides, etc., depending upon the number of monosaccharides they provide on hydrolysis.
Through this CBSE NCERT Class 12 Chemistry Chapter 14, you will further know that carbohydrates that yield many monosaccharide units on hydrolysis are called polysaccharides.
Carbohydrates may also be classified as either reducing or non-reducing sugars. All those carbohydrates which reduce Fehling’s solution and Tollens’ reagent are referred to as reducing sugars. All monosaccharides, whether aldose or ketose, are reducing sugars.
Download and solve the Solutions for NCERT Class 12 Chemistry Chapter 14 PDF given below.
NCERT Solutions for Class 12 Chemistry Chapter 14 (Biomolecules): Free PDF
NCERT Chapter 14 Biomolecules is an important chapter and thus, needs to be prepared well. This is why we have provided NCERT Solutions For Class 12 Chemistry Chapter 14 PDF below. These solutions are prepared by our academic experts and follow every NCERT guideline. This will assist you as reference material when you are unable to solve a question from this chapter. We have provided you with some basic examples to showcase our approach to its questions. Then you can go ahead and download the complete PDF of the NCERT Solutions for Class 12 Chemistry Chapter 14.
Q: Classify the following into monosaccharides and disaccharides: Ribose, 2-deoxyribose, maltose, galactose, fructose, and lactose
A: Monosaccharides: Monosaccharides are the simplest units of carbohydrates that cannot be hydrolyzed into simpler compounds. So, from the given options, Ribose, 2-deoxyribose, galactose, fructose are monosaccharides.
Disaccharides: A disaccharide is a carbohydrate formed when two monosaccharides are joined together, and a molecule of water is removed from the structure. Therefore Maltose, lactose are disaccharides from the given options.
Q: Enumerate the reactions of D-glucose, which its open-chain structure cannot explain.
A: (a) Aldehydes give 2, 4 − DNP test, Schiff’s test, and react with NaHSO4 to form the hydrogen sulfite addition product. However, glucose, despite having aldehydes, does not undergo these reactions.
(b) The pentaacetate of glucose does not react with hydroxylamine. This shows the absence of a free −CHO group from glucose.
(c) Glucose exists in two crystalline forms – α and β. The α-form (m. p. = 419 K) crystallizes from a concentrated glucose solution at 303 K, and the β-form (m. p. = 423 K) crystallizes from a hot and saturated aqueous solution at 371 K. the open chain structure of glucose cannot explain this behavior.
Q: What do you understand by the term glycosidic linkage?
A: Glycosidic linkage refers to the linkage formed between two monosaccharide units through an oxygen atom by losing a water molecule. It is the condensation of the hydroxyl group of two monosaccharides to form a link between them.
A sucrose molecule contains two monosaccharide units, α-glucose, and β-fructose, joined together by a glycosidic linkage.
Attempt Class 12 Chemistry Mock Test for Free
This CBSE NCERT Class 12 Chemistry Chapter 14 Biomolecules further teaches carbohydrates are essential for life in both plants and animals. They form a major portion of our food. This is what makes this chapter important. In addition, Embibe provides you with the free Class 12 Chemistry Chapter 14 Mock Test to boost up your preparation.
FAQs Related to NCERT Solutions for Class 12 Chemistry Chapter 14 PDF Download
A. Here is the list of exercises explained in NCERT Solutions for Class 12 Chemistry Chapter 14 PDF:
Ex 14.1: Carbohydrates
Ex 14.2: Proteins
Ex 14.3: Enzymes
Ex 14.4: Vitamins
Ex 14.5: Nucleic Acids
A. Nucleic acids are naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells. Thus, they play a vital role in directing protein synthesis. The two primary nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
A. An enzyme is a type of protein found within a cell. Enzymes create chemical reactions in the body. They speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform essential tasks.
A. Proteins are constituents of all the body cell’s most important substances that regulate metabolic processes. The basic structure of proteins is a chain of amino acids that contain carbon, oxygen, hydrogen, and nitrogen. They are essential for the growth and repair of muscles and other body tissues.
A. The pursuit of knowledge of what goes on chemically within a living system falls in the domain of biochemistry. Living systems are complex biomolecules like carbohydrates, proteins, nucleic acids, lipids, etc. The structures and functions of some of these biomolecules are discussed adequately in NCERT Solutions for Class 12 Chemistry Chapter 14.
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