Which of the following is not correct for ionic crystals
Options
(a) They possess high melting point and boiling point (b) All are electrolyte (c) Exhibit the property of isomorphism (d) Exhibit directional […]
The number of atoms per unit cell of bcc structure is
Options
(a) 1 (b) 2 (c) 4 (d) 6
Correct Answer:
2
Explanation:
No explanation available. Be the first to write the […]
A particular solid is very hard and has a very high melting point. In solid state it is a non conductor and its melt is a conductor of electricity . Classify the solid
Options […]
The range of radius ratio (cationic to anionic) for an octahedral arrangement of ions in an ionic solid is
Options
(a) 0 – 0.155 (b) 0.155 – 0.225 (c) 0.225 – 0.414 (d) […]
Which one of the following is a molecular crystal
Options
(a) Rock salt (b) Quartz (c) Dry ice (d) Diamond
Correct Answer:
Dry ice
Explanation:
No explanation available. Be the first […]
Which of the following statements about amorphous solids is incorrect
Options
(a) They melt over a range of temperature (b) They are anisotropic (c) There is no orderly arrangement of particles (d) They […]
The flame colours of metals ions are due to
Options
(a) Frenkel deffect (b) Schottky defect (c) Metal deficiency defect (d) Metal excess defect
Correct Answer:
Metal excess defect
Explanation:
The flame colours […]
p-type silicon is formed by adding a minute amount of an element with
Options
(a) five valence electrons (b) three valence electrons (c) six valence electrons (d) four valence electrons
Correct Answer:
three […]
Copper metal crystallizes with a face centred cubic (fcc) lattice .It has a coordination number of
Options
(a) 4 (b) 1 (c) 12 (d) 2
Correct Answer:
12
Explanation:
Every particle in a […]
A radioactive nucleus of mass M emits a photon of frequency v and the nucleus recoils. The recoil energy will be
Options
(a) Mc² – hv (b) h²v² / 2Mc² (c) zero (d) […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy