Carbohydrates (For Grade 10 Students)

Question: Decide whether sucrose is a disaccharide or monosaccharide. Give reason

Answer.

Since, sucrose on hydrolysis gives two molecules of monosaccharaides or simple sugars (glucose and fructose), so it a disaccharide. e.g.

Question: What is a dextrose sugar?

Answer.

The sugar that rotates plan of plan polarized light in right direction (clockwise) is called dextrose sugar. It is also known as common name of D-glucose . It is abundant in nature and mainly obtained from starch.

Question: What is the function of DNA?

Answer.

DNA replicates itself during cell growth. The main function of DNA is to store genetic information and to transmit it from generation to generation. It synthesis RNA which reads, decodes and genetic information from DNA to synthesis new protein.

Question: Distinguish between mono. di- and tri-saccharide. Give example.

Answer.

Monosaccharaides

Monosaccharide are simple sugars which can not be further hydrolyzed.

These carbohydrates are water soluble.

They are reducing sugar.

They are sweet in taste.

Examples. Glucose, fructose etc.

Disaccharides

Disaccharides can be hydrolyzed to two monosaccharide units.

They are water soluble.

Some disaccharide are reducing sugars (i.e. lactose )and some are non reducing sugars (i.e. sucrose )

They are sweet in taste.

Examples. Sucrose, lactose etc.

Polysaccharides

Polysaccharide can be hydrolyzed to many monosaccharaides units

These carbohydrates are insoluble in water.

They are non-reducing sugars.

They are not sweet in taste.

Examples. cellulose, starch etc.

Class 9 Chemistry Notes for Federal Board

Class 9 Chemistry Notes for Federal Board Introduction Class 9 Chemistry notes for the Federal Board have been written according to the National Curriculum 2006. It develops various skills such as questioning, observations, predicting, measuring, classifying, designing experiments, analyzing and interpreting the data. among students. We have made these notes very simple. After reading these notes, students can easily understand all topics. Students can answer all types of questions including essay type, short and multiple choice, self assessments and think tank. We have also solved exercises according to the Federal board examination pattern. Students, after going through 9th class chemistry notes can get maximum marks in their exams. They can lay down a strong foundation of scientific knowledge among students. In future, notes for class 9 will be available in pdf format. Students will be able to note pdf free download very soon. Students will have access to these notes in a mobi

Class 10 Chemistry Notes for Federal Board

Class 10 Chemistry Notes for Federal Board Introduction Class 10 Chemistry Notes for Federal Board have been written according to the National Curriculum 2006. These notes will make students able to learn topics by their own. 10th class notes for all chapters are very and easy to understand. After studying these notes, students will become confident to answer all type of questions. Chemistry notes for class 10 provide solution to all kinds of questions including essay type, short and multiple choice, self assessments and think tank. These notes also contain all past papers of reduced syllabus as well as complete syllabus. Soon, students will have access to 10th class chemistry notes in Urdu pdf download form. We are also working hard to provide all chemistry notes in pdf format and student will be able to download these notes. We also trying to upload video lectures about class 10 chemistry. Don't forget, you can test your chemistry by using online test. Furthermore, you highl

Theories of Covalent Bonding and Shapes of Molecules: MCQs

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Chemistry

T he Federal Board of Intermediate & Secondary Education (FBISE) is an autonomous body that conducts the examinations in the institutions affiliated with it in Pakistan as well as abroad. Punjab government has ten boards of Intermediate & Secondary Education including Bahawalpur Board, D.G. Khan Board, Faisalabad Board, Gujranwala Board, Lahore Board, Multan Board, Rawalpindi Board and Sargodha Board and each board conducts exams independently. Federal Board generally follows the international norms and standards. Federal Board paper pattern is quite tricky and similar to O-Level and A Level formats. These questions need conceptual approach to be solved. Punjab board’s Paper pattern is comparatively easy up to some extent. We are currently focusing on the subject of Chemistry for all classes affiliated with Federal Board ( IX , X , XI , XII ) and Punjab Board ( XI XII ). We intend to extend it to all subjects in future. After reading All Student Notes, studen

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