Popular Questions
- Explain how many portions of an atom located?
- How many atoms are present in 208 g of the element?
- What is the two dimensional coordination number of a molecule in square close-packed layer?
- A compound forms a hexagonal close-packed structure.
- What is the formula of the compound?
- Which of the following lattices has the highest packing efficiency
- An element with molar mass 2.7×10-2 kg mol-1 forms a cubic unit cell with edge length of 405 pm?
- What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?
- What type of stoichiometric defect is shown by:
- Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.
- Ionic solids, which have anionic vacancies due to metal excess defect, develop color. Explain with the help of a suitable example.
- A group 14 element is to be converted into n-type semiconductor by doping it with a suitable impurity. To which group should this ..
- What type of substances would make better permanent magnets, ferromagnetic or ferromagnetic. Justify your answer.
- How would you determine the standard electrode potential of the system Mg2+|Mg?
- Can you store copper sulphate solutions in a zinc pot?
- Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable condi..
- Calculate the equilibrium constant of the reaction:
- Calculate the standard Gibbs energy for the reaction:
- Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.
- Calculate the emf of the cell in which the following reaction.
- The resistance of a conductivity cell filled with 0.1 mol L–1 KCl solution is 100 ohms.
- Why does the conductivity of a solution decrease with dilution?
- Suggest a way to determine the ?m° value of water.
- The molar conductivity of 0.025 mol L–1 methanoic acid is 46.1 S cm2 mol–1. Calculate its degree of dissociation and dissociat..
- What is the mass of copper deposited at the cathode?
- How many electrons would flow through the wire?
- Suggest a list of metals that are extracted electrolytically.
- Consider the reaction:
- Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging.
- Suggest two materials other than hydrogen that can be used as fuels in fuel cells.
- Explain how rusting of iron is envisaged as setting up of an electrochemical cell.
- Arrange the following metals in the order in which they displace each other from the solution of their salts.
- Arrange these metals in their increasing order of reducing power.
