Carbohydrates - definition and classification - class-XII
Description: carbohydrates - definition and classification | |
Number of Questions: 67 | |
Created by: Girish Devgan | |
Tags: chemistry biomolecules |
The general formula of carbohydrates is:
Invert sugar is:
Which of the following compounds is found in abundance in nature?
Which of the following carbohydrate(s) can be hydrolyzed?
Molisch reagent is used to identify following compound?
The reagent which may be used to distinguish between cane sugar and glucose solution is
The two forms of $D-$glycopyranose obtained from solution of $D-$glucose are known as
A dextro rotatory sugar present in fruits is
At a certain temperature when glucose is dissolved in water lowering in vapour pressure is $0.0$ mmHg. What will be the vapour pressure of glucose solution if molality is$1/18$.
Which of the following sugar is/are exist in furanose form -
Which of the following is correct for Lactose
Carbohydrates are used by body mainly:
Which of the following is not a sugar?
Which of the following is a source of instant energy?
The products formed when a pinch of sugar is strongly heated for fifteen minutes in a test tube are:
When sugar is treated with sulphuric acid, we get a very pure form of:
Transition state structure of the substate formed during an enzymatic reaction is
Which enzyme converts glucose to ethanol?
The light coming from the sun is stored as energy in plants by the process of photosynthesis. This happens by converting carbon dioxide and water into:
Formula of glucose is :
Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution?
The two functional groups present in a typical carbohydrate are :
Out of $1$M glucose and $2$M glucose. 2M glucose has a higher boiling point.
Which among the following is not the example of carbohydrate ?
For 'invert sugar', the correct statement(s) is (are)
(Given : specific rotations of (+) -sucrose, (+) -maltose, L-(-)-glucose and L-(+)-fructose in aqueous solution are $+66^0, +140^0, -52^0$ and $92^0$, respectively)
One mole of each of glucose and fructose require $x$ and $y$ moles of periodic acid respectively, for oxidation. Hence, $x/y$ is
Molisch test is answered by
In fructose and glucose the possible optical isomers are:
The $\alpha$- D glucose and $\beta$- D glucose differ from each other due to difference in carbon atom with respect to its
What is the nature of glucose-glucose linkage in starch that males its so susceptible to acid hydrolysis?
Rate of reaction depends upon_________?
Number of $HIO _4$ molecule required to complete oxidation one mole of glucose is :
${ C } _{ 12 }{ H } _{ 22 }{ O } _{ 11 }\longrightarrow 12C+{ 11H } _{ 2 }{ O }$ in presence of concentrated ${ H } _{ 2 }{ SO } _{ 4 }$.
Which of the following is obtained in the above reaction?
Which of the following does not reduce Benedict's solution?
In plant glycolipids, the sugar is normally.
Which of the following is/are correctly matched?
Carbohydrates may be:
Which among the following is the main constituent of Biogas?
For the reduction of glucose to n-hexane, the reagent used is:
Which of the following is true regarding monosaccharides?
Raffinose on hydrolysis forms_________
Which of the following is synthetic sweetener?
Which of the following is incorrect?
Consider the given statements.
I. Dextrin and glycogen are polysaccharides
II. Lactose and glucose are disaccharides
III.Sucrose and maltose are disaccharides
IV. Raffinose is oligosaccharide
The incorrect statements is/are:
Consider the given statements:
I. Maltose is also known as malt sugar.
II. Sucrose is also known as cane sugar.
III. Lactose is also known as grape sugar.
IV. Starch is also known as amylum.
The correct statement(s) is/are:
Consider the statements about mono, di and oligo saccharides:
I. These are crystalline solids.
II. These are soluble in cold water.
III. These are tasteless.
The incorrect statement(s) is/are:
A carbohydrate which cannot be hydrolysed to simpler compounds is called:
Which sugar does not increases the calorific value?
State whether the following statements are True or False:
Aldohexoses exist in $2^6$ optical forms.
State whether the following statements are True or False:
Raffinose is a trisaccharide. On hydrolysis, it gives three molecules of glucose.
State whether the following statements are True or False:
Glucose is more sweeter than fructose
To separate a mixture of monosaccharides, you would use :
The minimum number of carbon atoms that should be present in a monosaccharide is :
Carbohydrates that, on attempted hydrolysis, are not cleaved to smaller carbohydrates are called :
Choose the incorrect statement from following:
Glucose and fructose are both monosaccharides.
Carbohydrates mix directly with blood and supply energy to the cells.
Which enzyme converts glucose to ethanol?
From the following substances, which carbohydrates has the maximum sweetness?
Carbohydrates contains carbon, hydrogen, and oxygen molecules.
Carbohydrates are ___________.
Which of the following is not the example of carbohydrate?
The polyhydroxy aldehydes are called:
D-glucose & D-fructose can be differentiated by :
Carbohydrates Contains:
Free aldehyde group can be produced on hydrolysis of which of the following compound(s)?
Which of the following is a physical property of sugar?