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Define the following term:
Zeta potential
Concept: Properties of Colloidal Solutions
[NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)
Concept: Bonding in Coordination Compounds >> Valence Bond Theory (VBT)
How do you convert:
2-bromobutane to but-2-ene
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Elimination Reactions
What is the role of coke in the extraction of iron from its oxides?
Concept: Occurrence of Metals
Draw the structures of the following molecules: BrF3
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds
Write the equations involved in the following reactions : Williamson synthesis
Concept: Preparation of Ethers
Why carboxylic acid does not give reactions of carbonyl group?
Concept: Acids >> Structure of the Carboxyl group
Write the chemical equations to illustrate the following name reactions : Rosenmund reduction
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Preparation of Aldehydes
How will you convert ethanal into the following compound?
But-2-enal
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen
How will you bring about the following conversion in not more than two steps?
Benzoic acid to Benzaldehyde
Concept: Acids >> Chemical Reactions of Carboxylic Acids - Reactions Involving –COOH Group
Write the chemical equations involved in the following reactions:
Carbylamine reaction
Concept: Concept of Amines >> Chemical Reactions of Amines - Carbylamine Reaction
Give reasons for the following: (CH3)2NH is more basic than (CH3)3N in an aqueous solution.
Concept: Physical Properties of Amines
What is the difference between a nucleoside and nucleotide?
Concept: Biomolecules in the Cell > Nucleic Acids >> Structure of Nucleic Acids
What is the difference between fibrous protein and globular protein ?
Concept: Introduction of Proteins
Write the product obtained when D-glucose reacts with H2N − OH.
Concept: Biomolecules in the Cell > Carbohydrates >> Monosaccahrides
Due to hectic and busy schedule, Mr Angad made his life full of tensions and anxiety. He started taking sleeping pills to overcome the depression without consulting the doctor. Mr Deepak, a close friend of Mr. Angad advised him to stop taking sleeping pills and suggested to change his life lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friend’s advice and after few days he started feeling better.
After reading the above passage, answer the following
(i) What are the values (at least two) displayed by Mr. Deepak?
(ii) Why is it not advisable to take sleeping pills without consulting doctor?
(iii) What are tranquilisers? Give two examples.
Concept: Classification of Drugs
If y = xx, prove that `(d^2y)/(dx^2)−1/y(dy/dx)^2−y/x=0.`
Concept: Simple Problems on Applications of Derivatives
Show that the altitude of the right circular cone of maximum volume that can be inscribed in a sphere of radius r is `(4r)/3`. Also find maximum volume in terms of volume of the sphere
Concept: Maxima and Minima
Find: `int(x+3)sqrt(3-4x-x^2dx)`
Concept: Methods of Integration> Integration by Substitution
Find: `I=intdx/(sinx+sin2x)`
Concept: Methods of Integration> Integration Using Partial Fraction
