Advertisements
Advertisements
प्रश्न
A compound is made up of two elements X and Y and crystallizes in bcc structure. Atoms of X are present at the corners of the cube. Atoms of Y are present at the centre of the cube. The formula of the compound is ______.
विकल्प
X2Y
XY
XY2
X2Y3
Advertisements
उत्तर
A compound is made up of two elements X and Y and crystallizes in bcc structure. Atoms of X are present at the corners of the cube. Atoms of Y are present at the centre of the cube. The formula of the compound is XY.
संबंधित प्रश्न
Ionic solids conduct electricity in molten state but not in solid state. Explain
Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.
Graphite and diamond are ____________.
Solid CO2 is an example of ____________.
Define unit cell.
Give any three characteristics of ionic crystals.
Classify the following solid.
Brass
____________ is an example of molecular crystal.
Which among the following is not true for crystalline solid?
Brass is an example of ____________.
Ionization enthalpy is lowest in ____________.
Which among the following is an example of non-polar molecule?
MgO has the structure of NaCl. The coordination number of the ions in MgO is ____________.
The hardest substance among the following is:
Solid CH4 is ____________.
Among solids, the highest melting point is exhibited by ____________.
Iodine molecules are held in the crystals lattice by ______.
Graphite cannot be classified as ______.
How many chloride ions are surrounding sodium ions in sodium chloride crystal?
An excess of potassium ions makes KCl crystals appear violet or lilac in colour since:
(i) some of the anionic sites are occupied by an unpaired electron.
(ii) some of the anionic sites are occupied by a pair of electrons.
(iii) there are vacancies at some anionic sites.
(iv) F-centres are created which impart colour to the crystals.
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
Inspite of long range order in the arrangement of particles why are the crystals usually not perfect?
Calculate the angle at which first order reflection will occurs in an X-ray spectrometer when x ~ rays of wavelength \[\ce{1.54 \overset{\circ}{A}}\] are diffracted by the atoms of a crystal given that inter planer distance is \[\ce{0.04 \overset{\circ}{A}}\]
The major binding force in diamond, silicon and quartz is ______.
A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.
Among the following which is the best description of water in the solid phase?
What are intermolecular forces of attraction involved in molecular crystals?
