Outer electronic configuration of Gd (Atomic no : 64) is -

Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is :

The rate of a chemical reaction doubles for every 10oC rise of temperature. If the temperature is raised by 50oC , the rate of the reaction increases by about :

Phenol is heated with a solution of mixture of KBr and KBrO3. The major product obtained in the above reaction is

Which of the following reagents may be used to distinguish between phenol and benzoic acid ?

Which of the following statement is wrong?

Which of the following statements regarding sulphur is incorrect?

Boron cannot form which one of the following anions?

Identify the compound that exhibits tautomerism.

The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 to a volume of 100 dm3 at 27oC is :

Silver Mirror test is given by which one of the following compounds ?

Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is

The strongest acid amongst the following compounds is :

Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

A 5.2 molal aqueous solution of methyl alcohol, CH3OH, is supplied. What is the mole fraction of methyl alcohol in the solution ?

The degree of dissociation ($$\alpha$$ ) of a weak electrolyte, AxBy is related to van’t Hoff factor (i) by the expression :

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at −6oC will be : [Kf for water = 1.86 K kg mol−1 , and molar mass of ethylene glycol = 62 g mol−1 )

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is :

The reduction potential of hydrogen half cell will be negative if :