✕
  1. Tardigrade
  2. Question
  3. Chemistry
  4. From NaCl unit cell, all ions along a diagonal from one edge center to another are absent. The correct expression for packing fraction (P.F.) of that NaCl unit cell (assume ideal) is

Q. From unit cell, all ions along a diagonal from one edge center to another are absent. The correct expression for packing fraction (P.F.) of that unit cell (assume ideal) is

NTA AbhyasNTA Abhyas 2020 Report Error

Solution:

Along edge diagonal only three Na+ ions would be absent, 1 body center and two edge centers.
Effective no. of
For

Questions from NTA Abhyas 2020

1. Which reaction is suitable for preparing -Chloroacetic acid?

2. A mixture of methane and ethene in a molar ratio of has an average molecular mass of . The mean molar mass when they are mixed in the molar ratio of will be -

Some Basic Concepts of Chemistry

3. For a given reaction, energy of activation for forward reaction is and . A catalyst lowers to . The ratio of energy of activation for reverse reaction before and after addition of catalyst is:

Chemical Kinetics

4. 3 Faradays of electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt. = 56) deposited at the cathode (in g) is

Electrochemistry

5. Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E and compound E on further treatment with aqueous KOH yields compound F. Then compound F is

Aldehydes Ketones and Carboxylic Acids

Chemistry Most Viewed Questions

1. If for a certain reaction is at , the value of (in for which the same reaction will be spontaneous at the same temperature is

NEET 2020

2. If of a non-electrolyte solute is dissolved in of n-octane to reduce its vapour pressure to , the molar mass (in of the solute is [Given that molar mass of n-octane is

NEET 2020 Solutions

3. An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of is is ]

NEET 2021 Some Basic Concepts of Chemistry

4. At standard conditions, if the change in the enthalpy for the following reaction is Given that bond energy of and is and , respectively, what is the bond energy (in of ?

NEET 2020

5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol]

NEET 2019 Some Basic Concepts of Chemistry

Latest Updates