Home
Class 12
PHYSICS
Carbon, silicon and germanium have four ...

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to `(E_g)_c, (E_g)_(Si) and (E_g)_(Ge)` Which of the following statements is true?

A

`E_g)_(Si)lt(E_g)_(Ge)lt(E_g)_c`

B

`(E_g)_clt (E_g)_(Si) lt (E_g)_(Ge)`

C

`(E_g)_clt (E_g)_(Si)gt (E_g)_(Ge)`

D

`(E_g)_clt (E_g)_(Si) = (E_g)_(Ge)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

A) For N_(2) O gas, the difference in specific heats at constant pressure and at constant volume is equal to 0.04545 cal/g B) Entropy of a perfectly crystalline solid is zero at absolute zero of temperature C) Standard Gibbs energy of formation and standard enthalpy of formation are zero for elements in standard state D) T(deltaS^(0) _("total") = Delta G Which of these statements are true?

Arrange the following metals in the order in which they displace each other from the solution of itheir salts. Al, 'C u , F e, M g' and 'Z n'.

Read the following statements and find out the incorrect statement. a. Embryo development precedes endosperm development. b. Though the seeds differs greatly the early stages of embryo development (embrogeny) are similar in both monocotyledons and dicotyledons. c. A typical dicotyledonous embryo consists of an embryonal axis and two cotyledons. d. Endosperm may either be completely consumed by the developing embryo (e.g., castor and coconut) before seed maturation or it may persist in the mature seed (e.g., wheat, rice, maize, pea, groundnut and beans). e. The coconut water from tender coconut is cellular endosperm and the surrounding while kernel is the nuclear endosperm.

The following is a list of characteristics features of angiosperms and gymnosperms. Those characters that belong to gymnosperms. (a) Tracheids alone from the conducting elements in xylem (b) production of fruits. (c) naked seeds (d) cones are seen (e) flowers absence (f) xylem mainly contains vessel (g) double fertilization present

Some information related to the elements of the p block in the 17th group of the periodic table are given in the table below. Complete the able and analyse the following questions. a) What is the family name of element belonging to 17th group? b) what is their common valency? c) Which element has the highest electronegativity? d) Which element has highest ionisation energy? e) List out the name and chemical formula of the compounds formed by this elements with s block elements. '(##VPU_TTT_CHE_X_P01_C01_E02_002_Q01##)'