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Solutions – Chapter 2 CBSE Class 12 Chemistry Short Answer Questions – 3 marks Q. 1. At 25°C the saturated vapour pressure of water is 3.165 kPa (23.75 mm Hg). Find the saturated vapour pressure of a 5% aqueous solution…
Solutions – Chapter 2 CBSE Class 12 Chemistry Short Answer Questions – 2 marks Q. 1. State Henry’s law. Write its one application. What is the effect of temperature on solubility of gases in liquid? [CBSE (F) 2016] Ans. It…
Solutions – Chapter 2 CBSE Class 12 Chemistry Very Short Answer Questions Q. 1. Define mole fraction. [CBSE Delhi 2012] Ans. Mole fraction of a component in a solution may be defined as the ratio of moles of that component…
Solutions – Chapter 2 CBSE Class 12 Chemistry Case-based Questions Read the given passages and answer the questions that follow: A solution which obeys Raoult’s law strictly is called an ideal solution, while a solution which shows deviations from Raoult’s…
Case Study Question 1 on Solutions – Chapter 2 CBSE Class 12 Chemistry Case-based Questions Read the given passages and answer the questions that follow: The spontaneous flow of the solvent through a semipermeable membrane from a pure solvent to…
Chemistry Class 12 NCERT CBSE New Syllabus 2022-23 CHEMISTRY (Code No. 043) (2022-2023) CLASS XII (2022-23) (THEORY) Time: 3 Hours M.M. – 70 Marks S.No. Title No. of Periods Marks 1 Solutions 15 7 2 Electrochemistry 18 9 3 Chemical…
Read the given passage and answer the questions that follow. Question. Temperature has a marked effect on the rate of reaction. For most of the reactions,the rate of reaction becomes nearly double for every 10 degree rise in temperature. The…
Case Study Question 1 on Chemical Kinetics – Chapter 4 Read the given passages and answer the questions that follow. Question. The rate of a chemical reaction is expressed either in terms of decrease in the concentration of a reactant…
Assertion-Reason Questions on Chemical Kinetics Questions : In the following questions, two statements are given—one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as…
Assertion-Reason Questions on Amines Questions : In the following questions, two statements are given—one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given…
Question : Amines have a lone pair of electrons on nitrogen atom due to which they behave as Lewis base. Larger the value of Kbor smaller the value of pKbstronger is the base. Amines are more basic than alcohols, ethers,…
Case Study Question on Amines – Chapter 13 CBSE Class 12 Chemistry Question : The conversion of primary amines into diazonium salts is known as diazotization. Arene diazonium salts are generally colourless crystalline solids highly soluble in water. These salts…
Case Study Question 3 on d & f Block Read the passage given below and answer the following questions: The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table.…
Case Study Question 2 on d & f Block Read the passage given below and answer the following questions: The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some…
Case Study Question on Amines Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an…
Case Study Question on d & f Block Read the passage given below and answer the following questions: Within the 3d series, manganese exhibits oxidation states in aqueous solution from +2 to +7, ranging from Mn2+(aq) to MnO−4 (aq). Likewise,…
A nucleophile is a molecule that forms a bond with its reaction partner (the electrophile) by donating both electrons for that bond. Nucleophiles are Lewis bases. The word ‘nucleophile’ can be split into two parts, namely nucleus and philos. Philos…
The meaning of nascent is newly born. In context of chemical reaction, nascent hydrogen or element means such elements which are produced in situ and are highly reactive elements compared to their ordinary forms. That is nascent hydrogen is more…
NCERT Solutions For CBSE Class 12 Chemistry Chapter 5 Surface Chemistry NCERT EXERCISES 5.1. Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.Ans: This phenomenon of attracting and retaining the molecules of a substance by…
NCERT Solutions For Class 12 Chemistry Chapter 4 Chemical Kinetics NCERT EXERCISES Question 1. From the rate expression for the following reactions determine their order of reaction and the dimensions of the rate constants:Sol: Question 2. For the reaction ;…