Quiz Medium 5

The sum of pH and pOH in aqueous solution is equal to

In the reaction HCN + H2O ↔ H3O+ CN- the conjugate acid-base pair is

Boric acid is added to glass, because it

Which element among the following cannot exhibit variable electrovalency ?

The current-voltage characteristics forms the basis of

One arm of each t-RNA terminates in the base sequence

The correct order of ionization energies of alkali metals is

Which of the following is the third most abundant element in the nature?

Different arrangements of groups in space which can be converted into one another by rotation around a single bond are called

If 20 ml of 0.5 N salt solution in diluted to one litre, what is the new concentration?

Which of the following physical property forms the basis of radio chemical methods of analysis?

Compounds HCN and HNC are

Various compounds corresponding to molecular formula C4 H10 are

The most abundant alkali metal is

Which name is associated with the rules which help in predicting the polarisability of anion?

If n and no are the coefficients of viscosity of a solution and the pure solvent, then specific viscosity may be expressed as

. Entropy is a measure of

Which of the following compound is electrovalent in nature?

Which of the following analytical technique is used for the separation of an interfering substance or analyte from the mixture?

The alkali metal that reacts with nitrogen directly to form nitride is

It is possible to distinguish between optical Isomers?

HS- is a conjugate base of

The Hall process involves the reduction of Al203 to aluminum by

Layer of C-atom in graphite are held together by

Which of the following technique is used to separate substances of high molecular weights (proteins, enzymes) of different charges?