Chemistry chapter 1 Solid State

 

Test on Solid State

20 Marks Time: 45 min

Q.no.1) Multiple choice question                        of  3M

i) In body centered cubic structure the space occupied is about         a) 68%    b) 53%    c) 38%    d) 32%

ii) Close packing is maximum in the crystal lattice of     a) Simple cubic    b) Face centered     c) body centered    d) none 

iii) The major binding force in diamond is     a) Covalent bond    b) ionic bond    c) metallic bond     d) co-ordinate covalent bond

Section B

Q.No.2) Solve any Two                     4M

i) Differentiate between tetrahedral and octahedral voids.

ii) A compound is formed by two elements M and N. The elements N formed ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound?

iii) Explain Schottky defect with example.

Section C

Q.No.3) Solve any Three                  9M

i) Explain defects in crystal structure.

ii) Differentiate between Crystalline and Amorphous solids

iii) Differntiate p and n types of conductors.

iv) The edge length of the unit cell of Ta, is 330.6 pm; the unit cell is body-centered cubic. Tantalum has a density of 16.69 g/cm³.

(a) calculate the mass of a tantalum atom.
(b) Calculate the atomic weight of tantalum in g/mol.

Section D

Q.No. 4) Solve any One                 4M

i) Derive expression for Density of Simple cubic and Body centered cell.

ii) Give seven systems of crystal lattice with their edge length and angle specifications.

Physics paper 12th : Topics: Chapters 10 to 13

 Pathak’s Academy Spectrum 2024

Topics: Chapters 10,11,12,13..

Marks: 30                                                                                                Time: 1h 10 min 

Section - A

Q.No. 1 : Select and write the correct answer (any 6) [06]

i) A conducting thick copper rod of length 1 m carries a current of 15 A and is located on the Earth's equator. There the magnetic flux lines of the Earth's magnetic field are horizontal, with the field of 1.3 × 10-4 T, south to north. The magnitude and direction of the force on the rod, when it is oriented so that current flows from west to east, are

(A) 14 × 10-4 N, downward.

 (B) 20 × 10-4 N, downward.

 (C) 14 × 10-4 N, upward.

 (D) 20 × 10-4 N, upward. 

ii) A charged particle is in motion having initial velocity v when it enters into a region of uniform magnetic field perpendicular to v. Because of the magnetic force the kinetic energy of the particle will

 (A) remain uncharged.(B) get reduced(C) increase. (D) be reduced to zero.

iii) Soft iron is used to make the core of transformer because of its

 (A) low coercivity and low retentivity 

 (B) low coercivity and high retentivity

 (C) high coercivity and high retentivity 

(D) high coercivity and low retentivity 

iv) Which of the following statements is correct for diamagnetic materials?

 (A) µr < 1 (B) χ is negative and low 

(C) χ does not depend on temperature (D) All of above

v) A circular coil of 100 turns with a cross-sectional area (A) of 1 m 2 is kept with its plane perpendicular to the magnetic field (B) of 1 T. What is the magnetic flux linkage with the coil?

 (A) 1 Wb (B) 100 Wb(C) 50 Wb (D) 200 Wb

vi) A current through a coil of self inductance 10 mH increases from 0 to 1 A in 0.1 s. What is the induced emf in the coil? 

 (A) 0.1 V (B) 1 V (C) 10 V (D) 0.01 V

vii) In an AC circuit, e and i are given by e = 150 sin(150t) V&i = 150 sin(150 t + π/3 ) A. the power dissipated in the circuit is 

 (A) 106 W (B) 150 W (C) 5625 W (D) Zero

viii) In a series LCR circuit the phase difference between the voltage and the current is 450. Then the power factor will be  (A) 0.607 (B) 0.707 (C) 0.808 (D) 1

Q. 2 Answer the following. [04]

i) Which property of soft iron makes it useful for preparing electromagnet?

ii) State Lenz’s law in the light of the principle of conservation of energy.

iii) Calculate the SI unit of Inductance.

iv) Draw the phasor diagram for purely capacitive ckt.

Section - B

Attempt any 5 [5 x 2 = 10 M]

i) Obtain and expression for orbital magnetic moment of an electron rotating 

about the nucleus in an atom.

ii)  What are eddy currents? State applications of eddy currents

iii) Explain why the inductance of two coils connected in parallel is less than the inductance of either coil.

iv) Discuss the Curie law for paramagnetic material.

iv) What do you mean by electromagnetic induction? State Faraday’s law of induction.

v) Compare between resistance and reactance.

vi) If the rms current in a 50 Hz AC circuit is 5A, the value of the current 1/300 seconds after its value becomes zero is?

Section - C

Attempt any Two. [3 x 2 = 6 M]

i) A toroid of narrow radius of 10 cm has 1000 turns of wire. For a magnetic field 

of 5 × 10-2 T along its axis, how much current is required to be passed through 

the wire?

ii) Explain Faraday's Laws of Electromagnetic Induction. Deduce equation for EMF

iii) Deduce the average Power equation for LCR ckt with ckt diagram

  

Section - D

Attempt any One. [1 x 4 = 4 M]

i) Explain Self and Mutual Induction Derive the equation for both with a diagram.

ii) What is Resonance ckt? Deduce the expression for series and parallel resonant circuit with their characteristics .Explain Q factor with the help of diagram.

Topics: Inorganic Chemistry Ch 7,8,9

               Spectrum 2024-25

Topics: Inorganic Chemistry 

Ch 7,8,9

Marks:30                      Time: 1h 15 min 

Section - A

Q.No. 1 : Select and write the correct answer (any 6) [06]

i) In interhalogen compounds, which of the following halogens is never the central atom.

a. I b. Cl c. Br d. F

ii) Which of the following has one lone pair of electrons ?

a. IF3 b. ICl c. IF5 d. ClF3

iii) Among the known interhalogen compounds, the maximum number of atoms is

a. 3 b. 6 c. 7 d. 8

iv) In which of the following series all the elements are radioactive in nature

a. Lanthanides b. Actinides c. d-block elements d. s-block elements

v) Which of the following sets of ions contain only paramagnetic ions

a. Sm3⊕, Ho3⊕, Lu3⊕

b. La3⊕, Ce3⊕, Sm3⊕

c. La3⊕, Eu3⊕, Gd3⊕

d. Ce3⊕, Eu3⊕, Yb3⊕

vi) IUPAC name of the complex [Pt(en)2(SCN)2]2+ is

a. bis (ethylenediamine)dithiocyanatoplatinum (IV) ion

b. bis (ethylenediamine)dithiocyantoplatinate (IV) ion

c. dicyanatobis (ethylenediamine)platinate IV ion

d. bis (ethylenediammine)dithiocynatoplatinate (IV) ion

vii). The sum of coordination number and oxidation number of M in [M(en)2C2O4]Cl is

a. 6 b. 7 c. 9 d. 8

Q. 2 Answer the following. [04]

i)Write the formula for tetraammineplatinum (II) chloride.

ii) What is the shape of a complex in which the coordination number of central metal ion is 4?

iii) Write probable electronic configuration of chromium and copper.

iv) What is the oxidation state of xenon in the

following compounds.

XeOF4, XeO3, XeF6, XeF4, XeF2

Section - B

Attempt any Four.[5x2=10 M]

i) What is meant by ‘shielding of electrons’ in an atom?

ii) Give one example showing reducingproperty of ozone.

iii) Give two uses of chlorine. 

iv) Explain trends in ionisation enthalpies of d block elements.

v) What are strong field and weak field ligands ? Give one example of each.

vi)Write electronic configuration and two uses of neon (Z=10)

Section - C

Attempt any Two. [3x2 = 6M]

i) Describe anomalous behavior of fluorine with the other elements of group 17 with reference to a) Hydrogen bonding b) Oxidation state        c) Polyhalide ion

ii) Draw isomers in each of the following

a. Pt(NH3)2ClNO2

b. Ru(NH3)4Cl2

c. [Cr(en2)Br2]⊕

iii) Fluorine shows only -1 oxidation state while other halogens show -1, +1, +3, +5

and +7 oxidation states. Explain.

Section - D

Attempt any One. [1x4 = 4 M]

i) Cerium and Terbium behaves as good oxidising agents in +4 oxidation state.Explain.

ii) What are ligands ? What are their types ?Give one example of each type.

Bsc I sem : Physics paper 2 : Unit 3 : Time Varying Fields

Class - BSc I sem

Sub. - Physics - Paper 2

Max. Marks - 20        Time - 1:30 Hr.

Q1 State and Explain Faraday's Law and Lenz's law of EM induction (2) Q2 State and Explain Kirchoff's voltage and current Laws.        (3)      Q3. What is Quality Factor?      (2) 

Q4 Explain different Energy losses in transformer?                            (2) 

Q5The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery? (3) 

Q6  A battery of EMF 10 V and  internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor?                                 (5) 

What is the terminal voltage of the battery when the circuit is closed?

Q7 If R1 = 2Ω, R2 = 5o, R3 = 5Ω, determine the electric current flows in the circuit below.                       (3)

TEST SERIES: CHEMISTRY: Chapter 2 :Solutions

Pathak's Academy Spectrum

 Class - XII 

Sub. - Chemistry 

Max. Marks - 25 Time - 1 Hr. 

Section - A 

Q.No. 1 : Select and write the correct answer [04] 

i) The colligative property of a solution is __________ 

a) Vapour pressure b) Osmotic pressure 

c) Boiling point d) Freezing point 

ii) Concentration of solution having osmotic pressure of 0.082 atm 

at 300 k would be ________ 

a) 0.04 M b) 0.44 M c) 0.033 M d) 1 M 

iii) Phenol on reaction with conc. HNO3 gives _________ 

a) Acetic acid b) Cyclohexanol 

c) Picric acid d) p-nitrophenol 

iv) Resorcinol on distillation with Zn - dust gives _________ 

a) Cyclohexane b) Benzene 

c) Toluene d) Benzenol 

Q. 2 Answer the following. [03] 

i) Write the product 'A' of the reaction ethyl alcohol CrO3 A 

ii) Write IUPAC name of CH3-O-CH-CH3

                                                         | 

                                                         CH3

iii) What is cryoscopic constant? 

Section - B 

Attempt any Four. [4 x 2 = 8 M] 

3) How will you prepare phenol from cumene? 

4) State and explain Raoult's law for the solution containing non 

volatile solute. 

5) What is the action of CH3MgBr on Acetaldehyde? 

6) The boiling point of solution containing 2.62 g of substance 'A' of 

100 g of water is higher by 0.0150C than the boiling point of pure 

water. What is molar moss of substance 'A' [Kb = 5.12 Km-1]

X CBSE MATHS CHAPTER 1 REAL NUMBER

 Q1. Express each number as a product of its prime factors:                                         (12) 

(i) 144

(ii) 7429

(iii) 3825

(iv) 5005

(v) 156

(vi) 81

Q2. Find the LCM and HCF of the following integers by the prime factorisation method.  (9) 

(i) 12, 15 and 21

(ii) 17, 23 and 29

(iii) 8, 9 and 25

Q3. Prove that √5 is irrational           (3) 

Q4. Prove that 3+√2 is irrational      (3) 

Q5. Given that HCF (306, 657) = 9 ,

 Find LCM (306, 657)                          (3) 

Paper on Unit II Bsc HSc II sem

 Time :  20 min   Marks : 10

Q1 a) State the nature of light as Electromagnetic wave.    (2) 

b)  Write the equation for the relationship between velocity and wavelength    (3) 

c)  If the velocity of light is 3 X 10^8 m/s,and it's wavelength is 450 nm then calculate the Frequency if light. (3) 

                       OR

Q1)  a) The laws of reflection.    (2) 

b ) Explain snell's law with suitable diagram. (3) 

c) If the angle of incidence is 40° and angle if refraction is 30° then Calculate the refractive index. (3) 

Q2 Write any four good and bad conductors of electricity. (2)