Chemistry mcqs

When electron jump into orbit 1 then series obtained is----------?

When common salt is dissolved in water ?

When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is ---------?

When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields-------?

When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen---------?

When catalysts and reactants are in more than one phase it is--------?

When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one positi

When benzene is heated in air with V2O5 at 450°C yields---------?

When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?

When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen.

When an atom absorbs energy the lines in the spectrum will appear which are---------?

When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as -----?

When an active metal like Al comes in contact with less active element like Cu then it produces---------?

When Ammonia is used as a refrigerant in vapour compression cycle?

When alcohol reacts with phosphorous halides it geive----------?

When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in---------?

When a compound of transition element is dissolved in a solution of salt then it produces----------?

When 6d orbital is complete the entering electron goes into---------?

When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?

When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?

When – COOH is attached directly to the benzene ring the acid is called---------?

What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ?

What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ?

What is the simplest form of matter ?

What is the relative rate of effusion of CO and CO2 ?