19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Sucrose when boiled with dil. HCl produce
Glucose and mannose are
The beta and alpha glucose have different specific rotations. When either is dissolved in water, their rotation changes until the same fixed value results. This is called.
Methyl –D-glucoside and methyl –D- glucoside are
During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process are respectively
Which one of the following vitamins is water soluble?
Which one of the following is a peptide hormone ?
Assertion: Sucrose is a non-reducing sugar. Reason: It has glycosidic linkage.
Assertion: Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis. Reason: Maltose has a 1,4’- -glycosidic linkage.
Assertion: Hydrolysis of sucrose is known as inversion of cane sugar. Reason: Sucrose is a disaccharide.
Assertion: Glucose does not give 2, 4- DNP test. Reason: Glucose exists in cyclic hemiacetal form.
Assertion: In sucrose two sugar units are joined by 1, 2-glycosidic bond Reason: It joins C₁ of -glucose and C₂ of -fructose by glycosidic bond.
Assertion (A) Deoxyribose, C₅H₁₀O₄ is not a carbohydrate. Reason: (R) Carbohydrates are hydrates of carbon so compounds which follow Cx(H₂O)y formula are carbohydrates.
What reagent is used in the Rosenmund’s reduction ?
The major product obtained in the following reaction is : (a) (b) (c) (d)
When a nucleophile encounters a ketone, the site of attack is
Which of the following compound gives a ketone with Grignard reagent:
Which one of the following will most readily be dehydrated in acidic condition ? (a) (b) (c) (d)
major product is (a) (b) (c) (d)
the compound (X) is
The smallest ketone and its next homologue are reacted with NH₂OH to form oxime
The IUPAC name of the following structure is
The end product in the following sequence of reaction is
Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is (a) (b) (c) (d)
The frequency of light emitted for the transition n = 4 to n = 2 of He⁺ is equal to the transition in H atom corresponding to which of the following?