Answers Solid State Test Paper Answers Solid State Test Paper Ans 1. (D). Solid CO2 is an example of a molecular crystal. Ans 2. (C). Atoms along one edge or at corners do not touch each other in the fcc cell. Ans 3. (D). Ans 4. Ans 5. (A). Ans 6. (A). n= N exp (-Ep/2kBT), where N = total atoms, n = Schottky defect are produced by removing n cations, r = anions from the interior of the crystal. Ans 7. (A). The number of atoms per unit cell in simple, face-centered, and body-centered…
Solid State Test Paper Solid State Test Paper Que 1. Solid CO2 is an example of the crystal type – (A) Ionic (B) Covalent (C) Metallic (D) Molecular Que 2. In an f.c.c. unit cell, atoms are numbered as shown below. The atoms not touching each other are (Atom numbered 3 is face centre of the front face). (A) 3 & 4 …
CBSE Important Questions Electrochemistry CBSE Important Questions Electrochemistry Que 1. Why conductivity of a solution does decrease with dilution? Ans 1. On dilution, the number of ions per unit volume decreases thus conductivity decreases. Que 2. If 0.5 ampere current flows through a wire for 2 hours. Calculate the number of electrons through the wire. Ans2. Q = I × t = 0.5 × 2 × 60 × 60 = 3600 C 96500 C is equivalent to charge on 1 mole = 6.022 × 1023 electrons 3600 C is equivalent to charge on = Que 3. How much charge is…
Board Important Questions Coordination Compound Board Important Questions Coordination Compound Que 1. Why are chelates more stable than open complex? Que 2. Anhydrous CuSO4 is white while hydrated CuSO4 is blue. Why? Que 3. Write IUPAC name of [Co(NH3)5ONO]2+. Que 4. Using IUPAC norms, write the formulas for the following. (i) Potassiumtri (oxalato) chromate (III) (ii) Hexammineplatinum (IV) (iii) Tetrabromidocuprate (II) (iv) Pentaamminenitrito N- cobalt (III) Que 5. Account for the different magnetic behaviour of hexacyanoferrate (III) and hexafluoroferrate (III). Que 6. Why is [CoF6]3- is paramagnetic but [Co(NH3)6]3+ diamagnetic in nature? Que 7. Predict the number of unpaired electrons…
States of Matter Class 11 Numericals States of Matter Class 11 Numericals Que 1. Calculate the temperature of 4.0 moles of gas occupying 5 dm3 volume at 3.32 bar. (R= 0.083 bar dm3 k-1 mol-1). Ans 1. PV = nRT T = PV/nR Que 2. A sample of gas occupies 100 dm3 at 1 bar pressure and at 00C. If the volume of the gas is reduced to 5 dm3 at the same temperature, what additional pressure must be applied? Ans 2. Que 3. A mixture of dihydrogen and dinitrogen at 1 bar pressure contains 20% by weight of…
Amines – Quick Key Points Amines – Quick Key Points 1. Amines are alkyl or aryl derivatives of NH3 2. Functional groups of 1º, 2º, and 3º amines are respectively as given below: -NH2, -NH-, -N- | 3. Gabriel phthalimide synthesis can’t be used for the preparation of 2º and 3º amines. It gives aliphatic primary amine only. 4. Hoffmann’s bromamide reaction gives 1º amines having one carbon atom less than parent primary amide. 5. The order of basic strength of aliphatic amines is: (i) Aliphatic amines…
Aldehydes and Ketones – Distinguish Tests Class 12 Aldehydes and Ketones Que. Give simple chemical tests to distinguish between the following pairs of compounds. (i) Propanal and propanone (ii) Acetophenone and benzophenone (iii) Phenol and benzoic acid (iv) Benzoic acid and ethyl benzene (v) Ethanal and propanal (vi) Benzaldehyde and acetophenone Answers: (i) Propanal and Propanone: These two are distinguished by the iodoform test. propanal does not give an iodoform test when it reacts with I2 in the presence of NaOH while propanone gives an iodoform test when reacts with I2 in the presence of NaOH. CH3COCH3 + NaOI → CH3COONa +…
CBSE Sample Paper Class 11 – Chemistry (Term 2 Solution) CBSE Sample Paper Class 11 – Chemistry (Term 2 Solution) To get paper click —- CBSE Sample Paper Class 11 – Chemistry (Term 2) SECTION –A Ans 1. (i) Dispersion force (ii) Dipole-dipole interaction (iii) Hydrogen bond (iv) Dipole-induced dipole interaction Ans 2. We have to find Density of ammonia (NH3) T = 30 + 273 = 303K, P = 5 bar, Mass of NH3 = 17gmol-1 R = 0.083 barLK-1mol-1 d = PM/RT, d = (5 × 17)/0.083 × 303 = 3.379 gcm-3 Ans 3. (i) Arrange…
CBSE Sample Paper Class 11 – Chemistry (Term 2) CBSE Sample Paper Class 11 To get answers click the link at the end MM: 70 Time: 3h GENERAL INSTRUCTIONS: Read the following instructions carefully. (i) There are 24 questions in this question paper with internal choice. (ii) SECTION A – Q. No. 1 to 6 are very short answer questions carrying 2 marks each. (iii) SECTION B – Q. No. 7 to 22 are short answer questions carrying 3 marks each. (iv) SECTION C- Q. No. 23-24 are case study-based questions carrying 5 marks each. SECTION- A Que 1.…
Mendeleev Periodic Table PDF Mendeleev’s Periodic Law (i) Properties of elements are periodic functions of their atomic weights. (ii) The elements are arranged in the increasing order of their atomic weights (iii) Similarities in physical and chemical properties” appear at regular intervals (iv) Mendeleev relied on the similarities in the empirical formulae and properties of the compounds formed by the elements. Characteristics of Mendeleev’s Periodic table. (i) Nine vertical columns called groups. These are designated as ), I, II, III, IV, V, VI, VII, and VIII. Except for groups 0 and VIII, each group is further divided into two…
