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Explain the formation of placenta after the implantation in a human female.
Concept: Pregnancy and Embryonic Development
Describe the structure of a nucleosome.
Concept: Packaging of DNA Helix
Although a prokaryotic cell has no defined nucleus, yet DNA is not scattered throughout the cell. Explain.
Concept: Packaging of DNA Helix
Write the effects of heroin on the human body.
Concept: Types and Effects of Psychoactive Drugs >> Effects of Drug and Alcohol Abuse
Describe the process of amplification of the “gene of interest” using the PCR technique.
Concept: Processes of Recombinant DNA Technology
A solution containing 15 g urea (molar mass = 60 g mol–1) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol–1) in water. Calculate the mass of glucose present in one litre of its solution.
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Define limiting molar conductivity.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Show that the time required for 99% completion is double of the time required for the completion of 90% reaction.
Concept: Half Life Period of a Reaction
Identify the order of reaction from the following unit for its rate constant:
L mol–1 s–1
Concept: Factors Influencing Rate of a Reaction
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
Concept: F-block Elements >> The Actinoids
Account for the following:
Zn is not considered as a transition element.
Concept: Physical Properties of the Transition Elements (d-block)
Write any two consequences of Lanthanoid Contraction.
Concept: F-block Elements >> The Lanthanoids
Give reasons for the following statement:
Zn, Cd, and Hg are soft metals.
Concept: Physical Properties of the Transition Elements (d-block)
Define coagulation.
Concept: Properties of Colloidal Solutions
Name the method of refining of metals such as Germanium.
Concept: Refining of Crude Metals
What is the role of silica in the extraction of copper?
Concept: Occurrence of Metals
How do you convert the following :
Phenol to anisole
Concept: Preparation of Ethers
Write the structures of the following molecule:
XeOF4
Concept: Group 18 Elements - The Noble gas Family
Write the mechanism of the following reaction :
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols
How do you convert the following:
Ethanol to Propan-2-ol
Concept: Commercially Importance Alcohols
