Home
Class 12
CHEMISTRY
Assertion(A) : Semiconductors are solids...

Assertion(A) : Semiconductors are solids with conductivities in the intermediate range from `(10^(-6)-10^(4)ohm^(-1)*m^(-1))`.
Reason ( R) : Intermediate conductivity in semiconductor is due to partially filled valence band.

A

(A) and ( R) both are correct statements and ( R) is correct explanation for (A).

B

(A) and ( R) both are correct statements but ( R) is not correct explanation for (A).

C

(A) is correct statement but ( R) is wrong statement.

D

(A) is wrong statement but ( R) is correct statement.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    CHHAYA PUBLICATION|Exercise LONG ANSWER TYPE|3 Videos
  • SOLID STATE

    CHHAYA PUBLICATION|Exercise MCQ HOTSPOT|62 Videos
  • SOLID STATE

    CHHAYA PUBLICATION|Exercise MATCHING TYPE|5 Videos
  • PREVIOUS YEARS QUESTION PAPER 2019

    CHHAYA PUBLICATION|Exercise WBCHSE 2019 PART-B|19 Videos
  • SOME p-BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTIVE SET 11|15 Videos

Similar Questions

Explore conceptually related problems

At 25^(@)C , the specific conductance and the resistance of a 1N solution of KCl in a conductivity cell are found to be 2.765xx10^(-3)" ohm"^(-1)."cm"^(-1) and 400 ohm respectively. The cell constant of the cell is -

A semiconductor has the eIectron concentration 0.45 xx 10^(12) "m"^(-3) and the hoIe concentration 5 xx 10^(20)m^(-3) . CaIcuIate the conductivity of the mate- riaI of this semiconductor. Given, Electron mobiIity =0.135 "m"^(2). V^(-1).s^(-1) and hoIe mobiIity =0.048 "m"^(2). V^(-1). s^(-1) .

A semiconductor has the electron concentration of 4xx10^(12) "cm" ^(-3) and the hole concentration of 7xx10^(13)"cm"^(-3) . Is this semiconductor n-type or p-type ? Also calculate conductivity of its material. Given : Electron mobility =22000 "cm"^(2)."V"^(-1).s^(-1) and hole mobility =150 "cm"^(2)."V"^(-1).s^(-1)

The specific conductance of a 0.12 N solution of an electrolyte is 2.4xx10^(-2) S Cm^(-1) . Calculate its equivalent conductivity,

STATEMENT -1 : Electrical consuctivity of semi -conductors incresase with increasing temperature . STATEMENT -2: With increase in temperature , number of electrons which jumps from the valence bond to the conduction band in semi-condctors increase .

At 25^(@)C resistance of 0.01 (N) KCl and 0.01 (N) HCl solutions in the same conductivity cell are 150 ohm and 51.40 ohm, respectively. The specific conductance of the KCl solution at 25^(@)C is 1.41xx10^(-3)" ohm"^(-1).cm"^(-1) . Determine the molar conductivity of HCl solution 25^(@)C .

The magnetic flux across a coil, of 50 turns and of diameter 0.1 m, changes from 3xx10^(-4)Wb" to "10^(-4)Wb in 0.02 s. The emf induced in the coil is

0.1 M solution is present in a conductivity cell wich electrode of 100cm^(2) area placed 1 cm apart and resistance observed is 5xx10^(3) ohm. What is the molar conductivity of this solution?

Specific conductance of "1 M KNO"_(3) solution is observed to be 5.55 xx 10^(-3)" mho.cm"^(-1) . What is the equivalent conductance of KNO_(3) when one litre of the solution is used ?

A semiconductor has the electron concentration of 8 xx 10^(13) "cm"^(-3) and hole concentration 4xx10^(12) "cm"^(-3) . Is this semiconductor n-type or p-type ? Also calculate resistivity of its material. Given : Electron mobility =24000 "cm"^(2). "V"^(-1).s^(-1). and hole mobility =200 "cm"^(2)."V"^(-1). s^(-1)