12th Physics and Chemistry Quarterly Exam Question Paper 2019

PHYSICS:-

1) What is the difference between coulomb force and gravitational force?

2) A parallel plate capacitor has square plates of side 5 cm and is separated by a distance of 1mm, then calculate the capacitance of the capacitor.
3) Define electrical resistivity. give its SI unit.
4) From the given circuit calculate the following quantities

• Equivalent emf of the combination 
• Equivalent internal resistance 
• total current 
• the potential difference across an external resistance

5) State ampere's circuital law
6) State Faraday's laws of electromagnetic induction 
7) State any two advantages of three phase alternator.
8) Write any four uses of x-rays 
9) In the magnetic field of 0.05T, the area of a coil changes from 101cm to 100cm without changing the resistance which is 2 . what is the amount of charge that flow during this period?
10) State the rule followed while drawing electric field lines for the representation of the electric field.
11) For the given capacitor configuration

1. Find the charge on each capacitor
2. Potential differences across each capacitor 

12) Explain the equivalent resistance of a parallel resistor network.
13) Discuss the conversion of a galvanometer into a voltmeter.
14) Compare dia, para, ferromagnetic materials.
15) How will you induce an emf by changing the area enclosed by the coil?
16) Write down any six properties of electromagnetic waves.
17) If the relative permeability and relative permittivity of the medium is 1.0 and 2.25 respectively .find the speed of the electromagnetic wave in this medium. 
18) Charges of +10/3*10-9 c are placed at each of the four corners of a square of side 8cm. find was the potential of the intersection at the diagonals.
19) Explain in detail the construction and working of a van de Graaff generator.
20) Deduce the relation for the magnetic induction t a point due to an infinity-long straight conductor carrying current
21) derive an expression for electrostatic potential due to an electric dipole.
22) Obtain the condition for bridge balance in Wheatstone's bridge.
23) Explain the force between two long parallel current-carrying conductors.
24) Explain the determination of the internal resistance of a cell using a potentiometer.
25) Calculate the magnetic induction at a point on the axial line of a bar magnet.
26) Explain the working of a single-phase AC generator with the necessary diagram.
27) Derive an expression for the phase angle between the applied voltage and current in a series circuit.
28) What are emission spectra? explain their types.

12th Physics Quarterly Exam Question Paper Tamil Medium Click Here To Download👇

                                                                           

12th Physics Quarterly Exam Question Paper English Medium Click Here To Download👇

                                                                           

CHEMISTRY:-

1) Why is fluorine more than other halogens?
2) Why is Gd3+ ion colourless?
3) Give one test to differentiate the coordination compounds.
4) Oxides like Ag2O4 undergo self-reduction. Why?
5) unavailable
6) Mention the uses of potash alum.
7) Sodium metals crystallizes in BCC structure with sedge length of the unit cell 4.3*10-3cm. 
8) What are the limitations of VB theory?
9) Give the schematic representation of the proper and improper alignment of reactant for a general reaction A2+B2=2AB.
10) Classify molecular crystals with an example for each type.
11) Describe the role of the following in the process mentioned.

1. Cryolite in the extraction of aluminium.
2. Iodine in the refining of Zirconium.

12)Complete the following reactions:

1. B+naoh=
2. sicl6+nh3=

13) Show that for a first-order reaction, the time required for 99.9% completion of the reaction is nearly 10 times that required for half completion of the reaction.
14) Compare lanthanides with actinides.
15) Explain the dehydrating property of sulphuric acid with a suitable example.
16) Which is more stable among Fe3+ and Fe2+ Why?
17) Differentiate molecularity from order.
18) Write the IUPAC names of the following coordination compounds.
19)  What are the main observations of the Ellingham diagram?
20) How will you identify borate radicals?
21) Drive the integrated equation for a zero-order reaction A=Products.
22) What is the inert pair effect?
23) The composition of a sample of wurtzite is ....calculate the percentage of ions present in the form of 
24) What is a pseudo-first-order reaction? give an example.
25) Explain Schottky's defect.
26) Write the difference between mineral and ore.
27) Write notes on zeolites.
28) What are interhalogen compounds? mention their properties.
29) give two uses of helium.

30) What is packing efficiency? calculate the packing efficiency in the BCC arrangement 

31) Explain the bleaching action and oxidizing nature of chlorine with a suitable example.

32) Why do d-block elements readily form coordination compounds?

33) Write the postulates of crystal field theory.
34) In metallurgy roasting of ore is done below its melting points whereas smelting is done above its points .why?

12th Chemistry Quarterly Exam Question Paper Tamil Medium Click Here To Download👇

                                                               

                                                                              

12th Chemistry Quarterly Exam Question Paper English Medium Click Here To Download👇

                                                                             

10th Quarterly Exam Question Papers:-

• 10th Tamil Quarterly Exam Question Paper 2019 < Click Here >
• 10th English Quarterly Exam Question Paper 2019 < Click Here >
• 10th Maths Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 10th Maths Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 10th Science Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 10th Science Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 10th Social Science Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 10th Social Science Quarterly Exam Question Paper 2019 English Medium < Click Here >

11th Quarterly Exam Question Papers:-

• 11th Tamil Quarterly Exam Question Paper 2019 < Click Here >
• 11th English Quarterly Exam Question Paper 2019 < Click Here >
• 11th Maths Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Maths Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 11th Physics Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Physics Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 11th Chemistry Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Chemistry Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 11th Botany Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Botany Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 11th Zoology Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Zoology Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 11th Biology Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 11th Biology Quarterly Exam Question Paper 2019 English Medium < Click Here >

12th Quarterly Exam Question Papers:-

• 12th Tamil Quarterly Exam Question Paper 2019 < Click Here >
• 12th English Quarterly Exam Question Paper 2019 < Click Here >
• 12th Maths Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 12th Maths Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 12th Botany Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 12th Botany Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 12th Zoology Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 12th Zoology Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 12th Biology Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
• 12th Biology Quarterly Exam Question Paper 2019 English Medium < Click Here >
• 12th Computer Science Quarterly Exam Question Paper 2019 Tamil Medium < Click Here >
•  12th Computer Science Quarterly Exam Question Paper 2019 English Medium < Click Here >