Chemistry 12th Grade Questions, 12th grade cbse Questions, 12th standard Chemistry Questions, 12th std Questions, cbse 12th standard exam Questions, Cbse 12th Examination Questions, 12th grade school college Chemistry Questions, 12th standard exam Questions. Cbse exam Questions, Chemistry Questions SiteMap
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Chemistry - Questions

CBSE 12th standard Questions

  Describe the following:(i) Acetylation (ii) Cannizzaro reaction (iii) aldol condensation (iv) Decarboxylation (v) Diazotisation
(class: 12th Std )    Chemistry

  Why does nitrogen show catenation properties less than phosphorus?
(class: 12th Std )    Chemistry

  Why are halogens strong oxidising agents?
(class: 12th Std )    Chemistry

  How are XeO3 and XeOF4 prepared?
(class: 12th Std )    Chemistry

  Write balanced equations when NaCl is heated with sulphuric acid in the presence of MnO2
(class: 12th Std )    Chemistry

  Give the disproportionation reaction of H3PO3.
(class: 12th Std )    Chemistry

  [i] What do you understand by the term glycosidic linkage? [ii] What is glycogen? How is it different from starch? [iii] What are the hydrolysis products of (i) sucrose and (ii) lactose
(class: 12th Std )    Chemistry

  Distinguish by a chemical test – (a) Acetaldehyde and acetone (b) Methyl amine and dimethyl amine (c) Phenol and benzoic acid.
(class: 12th Std )    Chemistry

  What happens when ethanol is heated with sulphuric acid at 413 K.? Explain mechanism of the reaction ?
(class: 12th Std )    Chemistry

  Why do noble gases have comparatively large atomic sizes?
(class: 12th Std )    Chemistry

  Why is dioxygen a gas but sulphur a solid?
(class: 12th Std )    Chemistry

  Why does R3P = O exist but R3N = O does not ?
(class: 12th Std )    Chemistry

  Explain: (i) Zone refining (ii) Column chromatography
(class: 12th Std )    Chemistry

  Discuss briefly giving an example the role of coordination compounds in biological systems
(class: 12th Std )    Chemistry

  What is spectrochemical series?
(class: 12th Std )    Chemistry

  write the formula for the Tetrahydroxozincate(II)
(class: 12th Std )    Chemistry

  Conductivity of 0.00241 M acetic acid is 7.896 × 10–5 S cm–1. Calculate its molar conductivity and if for acetic acid is 390.5 S cm2 mol–1, what is its dissociation constant?
(class: 12th Std )    Chemistry

  Calculate the mass of a non-volatile solute (molar mass 40 g mol–1) which should be dissolved in 114 g octane to reduce its vapour pressure to 80%
(class: 12th Std )    Chemistry

  What is meant by the term ‘broad spectrum antibiotics’ ? Explain.?
(class: 12th Std )    Chemistry

  Explain the term copolymerisation and give two examples?
(class: 12th Std )    Chemistry

  [NiCl4]2– is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. Why?
(class: 12th Std )    Chemistry

  Convert- (a) 2-Chlorobutane to 3, 4-dimethylhexane (b) 2-Methyl-1-propene to 2-chloro-2-methylpropane
(class: 12th Std )    Chemistry

  Explain the following about the transition elements- (a) Paramagnetic nature (b) Complex formation
(class: 12th Std )    Chemistry

  Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging.
(class: 12th Std )    Chemistry

  State Henry’s law and mention some important applications
(class: 12th Std )    Chemistry

  Silver forms ccp lattice and X-ray studies of its crystals show that the edge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u)
(class: 12th Std )    Chemistry

  Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it
(class: 12th Std )    Chemistry

  What are the advantage of artificial sweeteners ?
(class: 12th Std )    Chemistry

  Write the formula of the monomer used in the coating of non-stick cook wares ?
(class: 12th Std )    Chemistry

  What are essential amino acids ?
(class: 12th Std )    Chemistry

    

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