Chapter 16 Chemistry in Every Day Life
Chapter 16 Chemistry in Every Day Life NCERT INTEXT QUESTIONS Question 1: Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take their doses without consultation with the doctor. Why? Answer: Sleeping pills contain drugs which may be tranquilizers or antidepressants. They affect the nervous system […]
Chapter 15 Polymers
Chapter 15 Polymers NCERT INTEXT QUESTIONS Question 1. What are polymers? Answer: The word polymer has a Greek origin where poly means many and mers or meros stands for unit or part. Thus, the polymer may be defined as a substance of a high molecular mass (103 – 107 u) formed by the combination of a large […]
Chapter 14 Biomolecules
Chapter 14 Biomolecules NCERT INTEXT QUESTIONS Question 1. Glucose and sucrose are soluble in water but cyclohexane and benzene (simple six-membered ring compounds) are insoluble in water. Explain. Answer: Question 2. Question 4. Question 5. Where does the water in the egg go after boiling the egg? Answer: Upon boiling the egg, denaturation of globular […]
Chapter 13 Amines
Chapter 13 Amines NCERT INTEXT QUESTIONS Question 1. Classify the following amines as primary, secondary, and tertiary amines Answer: (i) primary (ii) tertiary (iii) primary (iv) secondary. Question 2. (i)Write the structures of different isomeric amines corresponding to the molecular formula, C4H11N. (ii) Write 1UPAC names of all the isomers. (iii) What type of isomerism is exhibited by different […]
Chapter 12 Aldehydes, Ketones and Carboxylic Acids
Chapter 12 Aldehydes, Ketones and Carboxylic Acids NCERT INTEXT QUESTIONS Question 1: Write the structures of the following compoimds : (i) α -Methoxypropionaldehyde (ii) 3-Hydroxybutanal (iii) 2-Hydroxycyclopentanecarbaldehyde (iv) 4-Oxopentanal (v) Di-sec butylketone (vi) 4-Fluoroacetophenone Answer: Question 2. Write the structures of products of following reactions: Answer: Question 3. Arrange the following compounds in increasing order of their boiling points : Answer: […]
Chapter 11 Alcohols, Phenols and Ehers
Chapter 11 Alcohols, Phenols and Ehers NCERT INTEXT QUESTIONS Question 1. Classify the following into primary, secondary, and tertiary alcohols Answer: (i) Primary alcohol (ii) Primary alcohol (iii) Primary alcohol (iv) Secondary alcohol (v) Secondary alcohol (vi) Tertiary alcohol Question 2. Identify allylic alcohol in the above examples. Answer: allylic alcohols: Question 3. Give the IUPAC names of the following compounds […]
Chapter 10 Haloalkanes and Haloarenes
Chapter 10 Haloalkanes and Haloarenes NCERT IN-TEXT QUESTIONS Question 1. Write the structures of the following compounds : (C.B.S.E. Delhi 2010) (i) 2-Chloro-3-methylpentane (ii) 1-Chloro-4-ethylcyclohexane (iii) 4-tert. butyl-3-iodoheptane (iv) 1,4-Dibromobut-2-ene (v) 1-Bromo-4-sec butyl-2-methylbenzene. (C.B.S.E. Sample paper 2011) Answer: Question 2. Why is sulphuric acid not used during the reaction of alcohols with KI? Answer: H2SO4 is an oxidising […]
Chapter 9 Coordination Compounds
Chapter 9 Coordination Compounds NCERT IN-TEXT QUESTIONS Question 1. Write the formulas of the following coordination compounds: (a) tetraamminediaquacobalt (III) chloride (b) potassium tetracyanonickelate (II) (c) tris (ethane-1, 2-diamine) chromium (III) chloride (d) amminebromidochloridonitrito-N-platinate (II) (e) dichlorobis (ethane-1, 2-diamine) platinum (TV) nitrate (f) iron (III) hexacyanoferrate (II). Answer: Question 2. Write the IUPAC names of […]
Chapter 8 d-and f-Block Elements
Chapter 8 d-and f-Block Elements NCERT IN-TEXT QUESTIONS Question 1. Silver has completely filled d-orbitals (4d10) in its ground state. How can you say that it is a transition metal ? Answer: Silver (Z = 47) belongs to group 11 of (7-block (Cu, Ag, Au) and its outer electronic configuration is 4d105s1. It shows + […]
Chapter 7 The p-Block Elements
Chapter 7 The p-Block Elements NCERT IN-TEXT QUESTIONS Question 1. Why are pentahalides more covalent than trihalides in the members of the nitrogen family? Answer: The electronic configuration of the elements of nitrogen family (group 15) is ns2p3. Because of the inert pair effect, the valence s-electrons cannot be released easily for the bond formation. […]