List of top Chemistry Questions asked in UP Board XII

Which of the following base is not present in DNA?
The concentration unit independent of temperature is:
Benzyl alcohol is obtained from benzaldehyde by –
Hinsberg’s reagent is –
The crystal system having dimensions $a \neq b \neq c$ and $\alpha = \beta = \gamma = 90^\circ$ is:
What is Schottky defect? What is the effect of the presence of Schottky defect on the density of lattice?
The unit of velocity constant for first order reactions is:
Write a short note on Nucleophilic substitution reactions in haloalkanes.
How will you obtain the following from Chlorobenzene? (Write only chemical equations) (i) Picric Acid
(ii) Dichlorobenzene
(iii) Chlorobenzene Sulphonic Acid
Write chemical equations of two methods of preparation of monohydric alcohol and also write chemical equation of the reactions of ethyl alcohol with conc. sulphuric acid (H$_2$SO$_4$) at different temperatures.
Write chemical equation for the preparation of ozone and its three oxidizing properties.
What is Aqua Regia? What happens when aqua regia reacts with (i) Gold, and (ii) Platinum.
Write short notes on the following: (i) Reimer–Tiemann reaction
(ii) Kolbe reaction
Write four characteristics of transition elements.
Write the chemical equation of the reaction of glucose with bromine water.
Write Nernst equation and its one application.
Write a short note on Acetylation.
Differentiate between Lyophilic and Lyophobic colloids.
Write a short note on IUPAC system of nomenclature of coordination compounds.
Write a short note on denaturation of proteins.
Write the chemical equation for the reactions of chlorine with (i) sulphur dioxide, and (ii) turpentine oil.
Write the chemical equation for the reactions of chlorine with (i) sulphur dioxide, and (ii) turpentine oil.
When a copper rod is dipped into silver nitrate solution, why does the colour of the solution turn blue? Explain.
How many primary alcoholic groups are present in glucose?
Define packing efficiency.