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Name the most commonly used bioreactor and describe its working.
Concept: Principles of Biotechnology
Explain the roles of the following with the help of an example each in recombinant DNA technology :
Restriction Enzymes
Concept: Tools of Recombinant DNA Technology >> Restriction Enzymes
Explain the roles of the following with the help of an example each in recombinant DNA technology :
Plasmids
Concept: Tools of Recombinant DNA Technology >> Competent Host (For Transformation with Recombinant DNA)
Represent diagrammatically three kinds of age-pyramids for human populations.
Concept: Population >> Population Attributes
“India has greater ecosystem diversity than Norway.” Do you agree with the statement? Give reasons in support of your answer.
Concept: Biodiversity
Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisation.
Concept: Biodiversity
Define azeotropes.
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
What type of deviation is shown by a mixture of ethanol and acetone? Give reason.
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
State Kohlrausch’s law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :
SO2Cl2 (g) → SO2 (g) + Cl2 (g)
| Experiment | Time/s–1 | Total pressure/atm |
| 1 | 0 | 0.4 |
| 2 | 100 | 0.7 |
Calculate the rate constant.
(Given : log 4 = 0.6021, log 2 = 0.3010)
Concept: Factors Influencing Rate of a Reaction
The conversion of molecules A to B follow second order kinetics. If concentration of A is increased to three times, how will it affect the rate of formation of B?
Concept: Factors Influencing Rate of a Reaction
Give reasons:
Transition metals show variable oxidation states.
Concept: General Properties of the Transition Elements (D-block)
Complete the following equation : MnO4- + 8H+ + 5e- →
Concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals
How do you prepare:
Actinoid elements show wide range of oxidation states.
Concept: F-block Elements >> The Actinoids
How do you convert Chlorobenzene to biphenyl?
Concept: Introduction of Haloalkanes and Haloarenes
Account for the following : Nitrogen does not form pentahalide.
Concept: p-Block elements of Group 15 Elements >> Dinitrogen
Draw the structure of the semicarbazone of ethanal.
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions
Why is the α-hydrogens of aldehydes and ketones are acidic in nature?
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen
Account for the following:
Although the amino group is o, p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
Concept: Amines >> Chemical Reactions of Amines - Electrophilic Substitution
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
Concept: Amines >> Nomenclature of Animes
