List of top Questions asked in UP Board XII

What are the advantages of Water Transport?
Mention the main features of Plantation Agriculture.
How does human life is influenced by the natural environment? Explain.
Mention the causes of Water Pollution.
Discuss the major trends of modern industrial activities especially in the developed countries of the world.
I.T.D.P. refers to which of the following?
Define Migration.
Which one of the following is a land-locked harbour?
What is Truck Farming?
Which of the following is the cause of Acid rain?
Which of the following is NOT an approach of Human Development?
Which one of the following states has the highest density of population?
In which of the following environments, one does not expect the presence of dispersed rural settlements?
In which of the following states are the major oil fields located?
Which one of the following is the most densely populated region?
Write the structural formula of benzaldehyde. Write chemical equations of the reactions of benzaldehyde with (i) NH$_2$NH$_2$
(ii) Tollen's reagent
(iii) HNO$_3$ and H$_2$SO$_4$
(iv) NaOH.
Write the IUPAC name of Acetaldehyde. Write its chemical equations with (i) NaHSO$_3$
(ii) NaOH
(iii) NH$_2$OH
(iv) CH$_3$OH in the presence of HCl gas.
Describe the laboratory method to prepare aniline and write the related chemical equation. Write also the equations of its two chemical properties and uses.
Write short notes on the following:
i) Carbylamine reaction
ii) Hofmann's bromamide reaction
iii) Acetylation
Prove that the time taken to complete 99.9% reaction is ten times the half-life period $(t_{1/2})$ for a first-order reaction.
Write down the method of preparation of phenol. Write chemical equations of the reaction of phenol with the following: (i) Conc. HNO$_3$ (ii) Bromine water (iii) Zinc
Write the chemical equation for the preparation of anisole. Write the chemical equations of its reactions with:
i) Acetyl chloride
ii) Hydrogen iodide
iii) Mixture of conc.\ H$_2$SO$_4$ and conc.\ HNO$_3$
Write the IUPAC names of the following coordinate compounds:
(i) [CrCl$_2$(en)]Cl
(ii) Cs[FeCl$_4$]
(iii) K$_3$[Co(C$_2$O$_4$)$_3$]
(iv) [CoCl$_3$(NH$_3$)$_3$]
What is electrode potential? Give the factors which affect the electrode potential of a metal.
Which elements are called transition elements? Explain: (i) Transition metals generally form coloured compounds, (ii) Transition metals or ions and many of their compounds show paramagnetic behaviour.