List of top Questions asked in UP Board XII

Write IUPAC names of the following: (i) CH\(_3\)CH = CH-CH\(_3\) Br
(ii) (CH\(_3\))\(_3\)-C-CH\(_2\)(Br)
(iii) CH\(_3\)CH\(_2\)-C-CH(Cl)CH\(_2\)CH\(_3\)
(iv) (CH\(_3\))\(_2\)CBrCH\(_2\)CH\(_3\)
(v) (CH\(_3\))\(_3\)Cl
Give chemical equation for the following reactions: (i) Oxidation of propan-1-ol with alkaline KMnO\(_4\):
How can the following changes be done? (Give chemical equations only) (i) Propan-1-ol from ethyl magnesium chloride:
Write short notes on the following: (i) Tyndall Effect
(ii) Brownian Movement
(iii) Coagulation
Write the structural formula of fructose. How is it different from the structure of glucose?
Give a chemical test for differentiating the following couple of compounds: (i) Secondary and Tertiary Amines
(ii) Methyl Amine and Dimethyl Amine
(iii) Ethylamine and Aniline
What do you understand by elevation in boiling point? Boiling point of a liquid is 350 K. On dissolving 2.0 g of a non-volatile solute in 100 g liquid, the boiling point of solution becomes 350.50 K. Calculate the molar mass of the solute. \( K_b \) for the liquid is 2.50 K kg mol\(^{-1}\).
What do you understand by order of reaction? What is the difference between the first order and zero order reaction? Following data was obtained on first order thermal decomposition of \(N_2O_5\) (g) at fixed volume: 2N\(_2\)O\(_5\) (g) \(\rightarrow\) 2N\(_2\)O\(_4\) (g) + O\(_2\) (g)
What are transition elements? Write the names and electronic configuration of the elements of the first transition series. Transition metals and their maximum compounds are paramagnetic. Explain.
Write the formulas of the following coordination compounds: (i) Tetracarbonyl nickel (0)
(ii) Dichlorobis(ethan-1, 2-diamine) cobalt(III) chloride
(iii) Pentamine carbonato cobalt(III) chloride
(iv) Tetramine aquachloro cobalt(III) chloride
Explain the following defects: (i) Interstitial
(ii) F-centred
What is Kohlrausch law? Write its applications.
Explain the following: (i) Electrophoresis
(ii) Dialysis
Explain the following: (i) Why is the atomic size of noble gases comparatively larger?
(ii) Being almost equal in electronegativity, Nitrogen forms hydrogen bond while chlorine does not.
Justify with reasons:
[NiCl\(_4\)]\(^{2-}\) is paramagnetic while [Ni(CO)\(_4\)] is diamagnetic, although both are tetrahedral.
Justify with reasons:
[Fe(H\(_2\)O)\(_6\)]\(^{3+}\) is stronger paramagnetic while [Fe(CN)\(_6\)]\(^{3-}\) is weaker paramagnetic.
What are polypeptides? Explain with example.
3.0 g of acetic acid is dissolved in 80 g of benzene. The molality of the solution is
Velocity constant for a first order reaction is \( 2 \times 10^{-3} \, \text{s}^{-1} \). The half-life period for this reaction is
The base not present in DNA is
Hinsberg reagent is
An element forms CCP lattice. If the length of its core of unit cell is 408.6 pm, then calculate the density of the element. (Atomic weight = 107.9 u)
Prepare a landscape painting of any one of the following subjects on the given drawing sheet in a rectangle of 20 cm x 15 cm. The medium of the painting should be watercolour, poster colour, or any other medium. Selection of the medium and the composition of the landscape should be beautiful and attractive:

(i) Scene of a river bank

(ii) Women working in a field

(iii) In a village scene, there are some trees and a hut.
In which state is the famous temple of Khajuraho situated?
Which colour medium is most transparent?