Questions Bank Applied Physics and Computer Application I III sem BScHSc Homescience

 Unit I

Q1. Explain ac and dc voltage with suitable diagram, frequency and voltage of ac.Explain Miniature Circuit Breakers(MCB) for domestic electric supply.

Q2. What are lightning conductor? How can electrical hazards be managed? 

Unit II

Q3. What are different Transmission of Heat?What are Modes of heat transfer? Explain with examples? 

Q4. How the temperature from Fahrenheit to Celsius and Kelvin can be converted and Convert temperatures among them. With examples.

Unit III

Q5. Explain the basic Principle, construction and working of solar cooker with suitable diagram. 

Q6. What is Heating effect of electric current?Explainthermostatic control and automation with bimetallic strip,and working of immersion heater 

Combined (Covered each unit)

Q7. Answer the following questions (very short) 

a) What is the need of lighting conductors on the roof ?

b) Differentiate any two points of good and bad conductors of heat

c) Complete the following sentences

 Vacuum flask is designed to keep ……..

 Bimetallic Strip is used in……

d)Write any two applications of MS-word

Unit IV

Q8. Explain the roll of operating system and features of WINDOWS, UNIXoperating systems.

Q9. Give Applications of MS-Excel and Explain the following commands  Open a new document, Open a saved document, Typing text, selecting text, copy-paste,cut-paste, saving file, closing file, renaming a file, page layout.

Questions Bank Applied Physics and Basic Computer I I sem BScHSc Homescience

 Unit 1 

Q1. Define scalar and vector quantities with two examples each.

What are CGS, MKS and SI systems of units. Any two examples of each. 8

Q2. Define Physics, Necessity of Physics in everyday life Explain the Concept of least count of a measuring instrument 8

Unit 2

Q3. Differentiate between Fundamental and derived quantities: explain Concept of fundamental and derived quantities with examples. 8

Q4. Define Distance, displacement, area, volume, mass, density, velocity with their SI units8

Unit 3

Q5. Explain the importance use of lubricants, washers, ball bearings, surface coating, surface 

polishing, design .State of Newton’s laws of motion, and two examples each. 8

Q6. Concept and definition of friction, types of friction .friction as an advantage and disadvantage measures to minimize undesired friction 8

Unit 4

Q7. Explain the block diagram of Computer. Also working of each block. 

Difference between software and hardware. 8

Q8. Define Memory Unit. Explain relation between Bit, byte with megabyte, gigabyte, terabyte. 8

Questions Bank Applied Physics and Computer Application I III sem BScHSc Homescience

 Unit I

Q1. Explain ac and dc voltage, frequency and voltage of ac.Explain Miniature Circuit 

Breakers for domestic electric supply.

Q2. What arelightning conductor? How can electrical hazards be managed? 

Unit II

Q3. What is Transmission of Heat?What are Modes of heat transfer? Explain with examples? 

Q4. How the temperature from Fahrenheit to Celsius and Kelvin can be converted and Convert temperatures among them. 

Unit III

Q5. Explain the basic Principle, construction and working of solar cooker with suitable diagram. 

Q6. What is Heating effect of electric current?Explainthermostatic control and automation with bimetallic strip,and working of immersion heater 

Combined 

Q7. Answer the following questions (very short) 

a) What are the basic needs of earthing?

b) Name any two good and bad conductors of heat

c) Complete the following sentences

 Vacuum flask is designed to keep ……..

 Bimetallic Strip is used in……

d)Write applications of MS-Word.

Unit IV

Q8. Explain the concept of operating system and features of WINDOWS, UNIXoperating systems.

Q9. Give Applications of MS-Word and describe commands like Open a new document, Open a saved document, Typing text, selecting text, copy-paste,cut-paste, saving file, closing file, renaming a file, page layout.

Questions Bank Applied Physics and Basic Computer I I sem BScHSc Homescience

 Unit I

Q1. Why there is necessity of a SI system of units? Explain this with two examples

What are FPS, CGS, MKS and SI systems of units. Any two examples of each. 8

Q2. Differentiate between scalar and vector quantities. 

Q3 Explain the Concept of least count of a measuring instrument

Unit II

Q4. Define Fundamental and derived quantities: Explain Concept of fundamental and derived 

quantities with examples. 

Q5. Explain Distance, displacement, area, volume, mass, density, speed, velocity with their SI units.

Unit III

Q6. Statements of Newton’s laws of motion, and two examples each.Explain the importance use 

of lubricants, washers, ball bearings, surface coating, surface polishing, design . 

Q7. Concept and definition of friction, types of friction (static and dynamic), friction as an 

advantage and disadvantage (at least five situations), measures to minimize undesired friction. (8 marks)

Unit IV

Q7. Explain the components of a computer system with block diagram. working of each block. 

concept of software and hardware. 

Q8. Define Memory Unit. 

Explain relation between Bit,byte with megabyte, gigabyte, terabyte.

BTech : Unit III : Batchler of Applied Electronics and Software

 1. Which of the following is the SI unit of conductance?

• Ohm
• Seimens
• Ohm/ m
• None of above

2. The reciprocal of electrical resistance is...

• Impedance
• Resistance
• Conductance
• Seimans

3. ....opposes the flow of current.

• Wire
• Battery
• Bulb
• Resistance

4. Ohm.meter is the SI unit of ....

• Electrical resistivity
• Electrical conductivity
• Resistance
• Current

5. Which of the following material has lowest value of electrical conductivity?

• Silver
• Aluminium
• Copper
• Gold

6. Silver has...... conductivity.

• Lowest 
• highest
• Neither high nor low
• Both 1 and 2

7. Resistivity of material depends on ..

• Length of wire
• Diameter of wire
• Density of  wire
• Material of wire

8. Material that conduct electric current....

• High resistivity
• Low resistivity
• Low conductivity
• None of above

Mcqs on electrostatics class 12th

 1. Which of the following statements is false for a perfect conductor?

(a) The surface of the conductor is an equipoten-tial surface.
(b) The electric field just outside the surface of a conductor is perpendicular to the surface.
(c) The charge carried by a conductor is always uniformly distributed over the surface of the conductor.
(d) None of these.

Ans

Answer: d

---

2. Dielectric constant for a metal is
(a) zero
(b) infinite
(c) 1
(d) 10

Ans

Answer: b

3. When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges separated by a distance

(a) increases K times
(b) remains unchanged
(c) decreases K times
(d) increases K-1 times

Ans

Answer: c

---

4. In a parallel plate capacitor, the capacity increases if
(a) area of the plate is decreased.
(b) distance between the plates increases.
(c) area of the plate is increased.
(d) dielectric constantly decreases.

Ans

Answer: c

---

5. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates
(a) increases
(b) decreases
(c) does not change
(d) becomes zero

Ans

Answer: a

---

6. Two identical capacitors are joined in parallel, charged to a potential V, separated and then connected in series, the positive plate of one is connected to the negative of the other. Which of the following is true?
(a) The charges on the free plated connected t mlo-gether are destroyed.
(b) The energy stored in ths system increases.
(c) The potential difference between the free plates is 2V.
(d) The potential difference remains constant.

Ans

Answer: c

---

7. A capacitor has some dielectric between its plates, and the capacitor is connected to a dc source. The battery is now disconnected and then the dielectric is removed, then
(a) capacitance will increase.
(b) energy stored will decrease.
(c) electric field will increase.
(d) voltage will decrease.

Aim:To study the charecteristics and verification of stability action of Zener diode

 Aim : To study the charecteristics and verification of stability action of Zener diode 

Apperatus : Zener diode, DC Battery , voltmeter

Miliammeter etc.

Formula : Static Resistance = V/I

                   Dynamic Resistance = ∆V/ ∆I

Diagram : 

Procedure : 1) Make the connection as shown in circkt diagram. Here the Zener diode is connected in reverse biased mode.

2) Start increasing the voltage by 0.1V steps.

3) Note down the value of voltage where you first find the current in millimetre.

4) Go on increasing the value of Voltage from voltmeter. Note down the corresponding values of current. Note down the voltage at which current suddenly increases.

5) Draw a graph of Voltage Vs Current in third quadrant because the zener diode is connected in reverse biased mode.

6) Calculate the value of Resistance from the formula.

7) Interprete your Result with SI unit.

8) Write the conclusion from the observed 

Results :

1) The Breakdown Voltage for Zener diode is......V

 2) The calculated value of Static Resistance is.....ohm

 3) The calculated value of Dynamic resistance is...ohm

To study the charecteristics of Silicon and Germanium diode and their comparison

Aim : To study the charecteristics of Silicon and Germanium diode  and their comparison

Apperatus : pn junction diode of silicon and germanium.

Formula : Static Resistance = V/I

                   Dynamic Resistance = ∆V/ ∆I

Diagram : 

Procedure : 1) Make the connection as shown in circkt diagram.

2) Start increasing the voltage by 0.1V steps.

3) Note down the value of voltage where you first find the current in millimetre.

4) Go on increasing the value of Voltage from voltmeter. Note down the corresponding values of current.

5) Draw a graph of Voltage Vs Current.

6) Calculate the value of Resistance from the formula.

7) Interprete your Result with SI unit.

8) Repeat the above steps 1) to 7) for second diode

9) Compare their Results and note that which diode is more conducive. Write the conclusion from the observed Results.

Result :

1) The Cut-in Voltage for Germanium and Silicon diodes are....... and.......

 2) The calculated value of Static Resistance is.....

 3) The calculated value of Dynamic resistance is....

BTech : Unit I : Batchler of Applied Electronics and Software TechnologyApplied Physics

1. When a ferromagnetic material is heated above curie temperature it becomes...

• Paramagnetic
• Diamagnetic
• Non magnetic
• Strongly charged. 

2. Curie temperature is the temperature at which....

• Magnetic properties stops
• Magnetic properties change its magnetic material
• No change occurs
• Magnetic properties change its temperature

3. Which of the following magnetic material has ferromagnetic properties?

• Phosphorus
• Sulfur
• Nickel
• Carbon

4. The domain structure of Paramagnetic material ....... external magnetic field.

• Remains as it is
• In the same direction of
• In the opposite direction of
• None of these

5. When the diamagnetic substance is placed in external magnetic field.....

• Remains as it is
• In the same direction of
• In the opposite direction of
• None of these

6. The net moment is zero means that material is

• Ferromagnetic
• Antiferromagnetic
• Paramagnetic
• Diamagnetic

7. When the antiparallel orientation of unequal moment occurs, then the material is ...

• Ferromagnetic
• Antiferromagnetic
• Ferrimagnetic
• All of the above

8. Which of the following memories contains a thin film of magnetic material sandwitched between two permanent bias magnets?

• ROM

• Magnetic disk
• Core memory
• Bubble memory

9. Magnetic tape is type of .......

• non-volatile memory 
• volatile memory 
• Both volatile and non-volatile memory 
• Temporary memory

10. Magnetic tape data storage is a system for....

• Attracting different materials
• Magnetising any material
• Storing digital information on magnetic tape 
• None of above

11. Which of the following material is nonmagnetic

• Copper
• Iron
• Stainless Steel
• None of the above

Imp questions 12th Chemistry

 THE MOST IMPORTANT QUESTION (IMP)OF THE 12TH CHEMISTRY HSC MAHARASHTRA BOARD FOR THE BOARD EXAM.

SOLUTION AND COLLIGATIVE PROPERTIES

1. Define a) Solute b) Solvent

2. What are colligative properties?

3. What is relation between molecular mass and lowering vapour pressure?

4. Define  Ebullioscopic constant ?

5. What is Freezing Point?

6. Why the Aquatic life prefer to stay bottom of Sea?

SOLID STATE IMP QUESTION FOR MAHARASHTRA BOARD EXAM 2022

1. Differentiate between Amorphous and crystalline solids ?

2. What are different type of unit cell?

3. What is covalent ? Give its examples?

4. How many particle present in SCC, BCC, FCC unit cell?

5. What is relation of molar mass and density of unit cell ?

6. Co ordination number ?

7. What are defects in solids ?

IONIC EQUILIBRIA

1. Define electrolyte and non-electrolyte ?

2. What are acids and base ?

3. Hydrolysis of salt ?

4. what are buffer solution ?

5. Common ion effect ?

6. Hydrolysis of Sa + Sb ?

7. What is pH and poH ?

CHEMICAL THERMODYNAMICS 

1. Types of system ?

2. Identify extensive property and Intensive Properties?

3. What is work and Heart ?

4. Wmax=-2.303 nRT log 10 v2/v1

5. 1st Law of Thermodynamics

CHEMICAL KINETICS 

1. Define a) Rate law b) Rate of Reaction

2. Difference between order of reaction and molecularity of reaction ?

3. Integrated rate law for 1st /Zero order reaction ?

4. Half life for zero and 1st order ?

5. Effect of catalyst and temperature ?

6. Arrhenius equation ?

ELECTROCHEMISTRY

1. Difference between electrolytic cell and galvanic cell ?

2. Explain Electrolysis of fused Nacl ?

3. Faraday's 1st law ?(Numerical)

4. Ecell=Ec-Ea? (Numerical)

5. Nernst equation ? (Numerical)

6. What is Salt Bridge ?

7. Conductivity and molar conductivity ?

Elements of 16,17,18 group (6-8)

1. Electronic configuration 16,17,18 group ?

2. Anomalous behaviour of N, O, F

3. Variable oxidation state of element from following H2SO4 , H2SO7 ?

4. What is oxoacids ?

5. What is interhalogen compounds ?

6. What are uses of noble gas elements ?

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Test series :Halogen derivatives:12th

 Pathak’s Academy Spectrum 2022

Topics: Chapters 10,11

Marks: 25                                                                       Time: 1h 

                                                                         Section - A

Q.No. 1 : Select and write the correct answer (any 5) [05]

i) Which of the following is used as source of dichlorocarbene

a. Tetrachloromethane b. Chloroform c. iodoform d. DDT

ii) Resorcinol on distillation with zinc dust gives

A. Cyclohexane B. Benzene C. Toluene D. Benzene-1, 3-diol

iii) The best method for preparation of alkyl fluorides is

a.Finkelstein reaction b.Swartz reaction c.Free radical fluorination d. Sandmeyer's reaction

iv) Identify the chiral molecule from the following.

a. 1-Bromobutane b. 1,1- Dibromobutane c. 2,3- Dibromobutane d. 2-Bromobutane

v) Anisole on heating with concentrated HI gives

A.Iodobenzene B.Phenol + Methanol

C. Phenol + Iodomethane D.Iodobenzene + methanol

vi) Ethers are kept in air tight brown bottles because

A. Ethers absorb moisture B. Ethers evaporate readily

C. Ethers oxidise to explosive peroxide D. Ethers are inert

vii) Choose the compound from the following that will react fastest by SN1mechanism.

a. 1-iodobutane b. 1-iodopropane c. 2-iodo-2 methylbutane d. 2-iodo-3-methylbutane

Section - B

Attempt any 5 [5 x 2 = 10 M]

i) Haloarenes are less reactive than halo alkanes.give reason

ii) Hydroboration-oxidation of propene gives.....

iii) Write structure of optically active alcohol having molecular formula C4H10O

iv) Arrange the following in the increase order of boiling points

a. 1-Bromopropane b. 2- Bromopropane c. 1- Bromobutane d.1-Bromo-2-methylpropane

v) Distinguish between - SN1 and SN2 mechanism of substitution reaction ?

vi) Explain why phenol is more acidic than ethyl alcohol.

                                                      

                                                      Section - C

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

i)Write structural formulae for

a. 3-Methoxyhexane b. Methyl vinyl ether c. 1-Ethylcyclohexanol

ii) Match the pairs.

        Column I                Column II

a. CH3 CH-CH3            i. vinyl halide

             X     

b. CH2=CH-CH2X       ii. alkyl halide

c. CH2=CH-X              iii. allyl halide

                                    iv. benzyl halide

                                    v. aryl halide

iI) Explain why p-nitrophenol is a stronger acid than phenol.

iii)  Convert the following.

i. Propene to propan-1-ol ii. Benzyl alcohol to benzyl cyanide iii. Ethanol to propane nitrile

 

Section - D

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

i)  Give the reagents and conditions necessary to prepare phenol from

a. Chlorobenzene b. Benzene sulfonic acid.

ii) Give the equations of the reactions for the preparation of phenol from isopropyl

benzene.

 

TEST SERIES: CHEMISTRY Chapters 1,2

 Pathak’s Academy Spectrum 2022

TEST SERIES: CHEMISTRY

Chapters 1,2

Section A

Q.no.1) Multiple choice question                        of  7M

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

iv) The boiling point of water at high altitude is low because    a) Low temp.    b) Low pressure    c) high temp    d) high pressure

v) The temperature at which vapour pressure of a liquid becomes equal to atmospheric pressure is    a) melting point    b) boiling point    c) 273K    d) 373K

vi) Molal elevation  constant is elevation in boiling point produced by    a) 1g solute in 100g solvent        b) 100g solute in 100g solvent    c) 1mole solute in 1L of solvent    d) 1 mole of solute in 1kg of solvent

vii) Which of the following is not a colligative property?     a) vapour pressure    b) Depression in freezing point    c) elevation in boiling point    d) Osmotic pressure

Section B

Q.No.2) Solve any FOUR                                    8 M

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) Define Semi-permeable membrane and Osmotic pressure.

iv) Explain Raoult’s law .

v) What are the factors which affects the vapour pressure?

vi) Explain Schottky defect with example.

Section C

Q.No.3) Solve any FOUR                                12 M

i) Explain defects in crystal structure.

ii) Differentiate between Crystalline and Amorphous solids

iii) Define: Molarity, Normality and Molality.

Iv) 0.15 molal solution of substance boils at 373.23 K. Calculate molal elevation constant of water 

(given: boiling point of water is 373.15K ).

v) Explain laws of osmotic pressure.

vi) Describe TWO main types of conductors.

Section D

Q.No. 4) Solve any TWO                                    8M

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.

iii) What is lowering of vapour pressure? Explain with suitable experiment.

iv) Explain graphically depression of freezing point on addition of solute.