Author: Dr. Vikas Jasrotia

Case Study Questions p – Block Elements Case Study Questions p – Block Elements 1. Read the passage given below and answer any four out of the following questions: Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and…

Organic Chemistry Practice MCQs (Answers) for Class 12 Organic Chemistry Practice MCQs (Answers) for Class 12 Ans 1. (b) Propan-2-ol       Ans 2. (d) Propanone Ans 3. (b) 1-Methylcyclohexan-1-ol Ans 4. (d) X on reaction with Na, does not produce H2 gas Ans 5. (d) Benzyl alcohol  Ans 6. (c) Treatment with pyridinium chlorochromate                 Ans 7. (b) Substitution reaction  Ans 8. (c) B, C                   Ans 9. (b) Ans 10. (b) o-nitrophenol  Ans 11. (d) m-Chlorophenol  Ans 12. (a) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol       Ans 13. (a) CH3CHOHCH3           Ans 14. (c) Both types                   Ans 15. (a) Pri >…

Organic Chemistry Practice MCQs for Class 12 Organic Chemistry Practice MCQs for Class 12 Read the passage given below and answer the following questions: Alkene hydration is a catalytic process that involves the addition of water across the double bond of an alkene to produce alcohol. This is the most direct and atom-economical approach to the synthesis of alcohols. Acid-catalyzed alkene hydration is the most well-known hydration process. This process is used industrially with several different acidic species as the catalyst, including zeolites, oxides, solid phosphoric acid, and sulfuric acid. There are several major drawbacks to this catalytic process. The…

To get questions for the post-Chemistry Practice MCQs (Answers) for Class 12 click the link at the end of the post Chemistry Practice MCQs (Answers) for Class 12 1. (d) 0.02  2. (d) 0.1 M Aluminium nitrate 3. (c) Boiling Point Increases and Freezing Point Decreases 4. (a) Urea 5. (d) Potassium sulphate 6. (c) Concentration of solute particles 7. (a) Osmotic pressure 8. (b) Flow of solvent particles, from solvent to solution through SPM 9. (a) Calcium chloride 10. (c) There is no flow of water 11. (a) Increasing temperature of the solution 12. (a) The enthalpy of mixing is zero…

Chemistry Practice MCQs for Class 12 Chemistry Practice MCQs for Class 12 1. NaCl is 100 % ionized in a 0.01 molal aqueous solution. Hence the ratio of elevation in boiling point to molal elevation constant is: (a) 0.01 (b) 0.015 (c) 0.0175 (d) 0.02 2. Which has the highest boiling point: (a) 0.1 M Sodium sulphate (b) 0.1 M glucose (c) 0.1 M Magnesium chloride (d) 0.1 M Aluminium nitrate 3. What is the effect of the addition of sugar on the boiling and freezing point of water (a) Both Boiling Point and Freezing Point Increases (b) Both…

In this post students will get the answers for the post Practice MCQs Chemistry Class 12 – Solid State and p – Block Elements. The link for the questions is also given at the beginning as well as at the end of the post To Get Questions Click Here Practice MCQs (Answers) Chemistry Class 12 Ans 1. (d) Molecular crystal Ans 2. (d) 1/8 part Ans 3. (a) 32 % Ans 4. (b) 1 Ans 5. (d) 12 Ans 6. (c) 1/8, ½ Ans 7. (b) Edge centre and body centre Ans 8. (b) X4Y5 Ans 9. (a) XY3…

Dear students solve these questions and then check your score. To get answers for the post Practice MCQs Chemistry Class 12 – Solid State and p – Block click the link given at the end of the post Practice MCQs Chemistry Class 12 Practice MCQs Chemistry Class 12 Que 1. Solid carbon dioxide is an example of (a) Ionic crystal (b) Covalent crystal (c) Metallic crystal (d) Molecular crystal Que 2. In a simple cubic unit cell, an atom at the corner contributes to the unit cell (a) 1 part (b) 1/2 part (c) 1/4 part (d) 1/8 part Que…

Case Study Questions on Solid State 1. Read the passage given below and answer the following questions: All real structures are three-dimensional structures. They can be obtained by stacking two-dimensional layers one above the other while placing the second square close-packed layer above the first we follow the same rule that was followed when one row was placed adjacent to the other. The second layer is placed over the first layer such that the spheres of the upper layer are exactly above there of the first layer. In his arrangement spheres of both the layers are perfectly aligned horizontally as…

Case Study Based Questions on Biomolecules Case Study Based Questions on Biomolecules 1. Read the given passage and answer the questions that follow Monosaccharides containing an aldehyde group are called aldoses while those containing a keto group are called ketoses. All monosaccharides containing five and six carbon atoms have cyclic structures, furanose (five-membered) and pyranose (six-membered). During ring formation, C1 aldoses and C2 in ketoses becomes chiral and hence all these monosaccharides exist in two forms called the α-anomer and β-anomer while C1 and C2 are called glycosidic or anomeric carbon atoms. In contrast, stereoisomers, which differ in configuration at…

Alcohols Phenols and Ethers Case-Based Questions Alcohols Phenols and Ethers Case-Based Questions 1. Read the given passage and answer the questions that follow: Alcohols play a very important role in our daily life. Ordinary spirit used as an antiseptic contains methanol. Ethanol is present in cough syrups, tonics, wine, beer, and whisky, Sugar, starch, cellulose are carbohydrates that also contain a large number —OH groups. Phenol is also an antiseptic in low concentration (0.2%) whereas a 2% solution of phenol is used as a disinfectant. The fragrance of rose is due to citronellol (unsaturated alcohol). Phenol is used for the…