List of top Chemistry Questions

Metals having $ \text{n}{{\text{s}}^{\text{1}}} $ the valence electronic configuration:

The conjugate acid of $ \text{N}_{3}^{-} $ (Azide ion) is :

When ethyne is passed through dilute $ {{H}_{2}}S{{O}_{4}} $ containing $ {{H}_{g}}S{{O}_{4}}, $ it forms:

0 .15 g of a substance dissolved in 15 g of a solvent higher by 0.216$^\circ$C than that of the pure solvent. Find out the molecular weight of the substance. $(K_b\, for\, solvent \, is\, 2.16 ^\circ C)$

The oxidation number of phosphorus in pyrophosphoric acid is

Gammexane is

Amides can be converted into amines by a reaction named after

The most suitable method of the separation of a mixture of ortho and para nitrophenol mixed in the ratio of 1 : 1 is

The type of hybridization of boron in diborane is

Ethyl chloride is converted into diethyl ether by

Which of the following configuration is correct for iron?

Natural rubber is a polymer of

Purification of aluminium by electrolytic refining is called

The Minamata disease in Japan was caused through the pollution of water by

Terylene is a condensation polymer of ethylene glycol and

Who modified Bohr's theory by introducing elliptical orbits for electron path?

The specific conductance of a $N / 10 \,KCl$ at $25^{\circ} C$ is $0.0112\, ohm ^{-1} cm ^{-1} .$ The resistance of cell containing solution at the same temperature was found to be $55\, ohm$. The cell constant will be

Cassiterite is an ore of

The oxyacid of phosphorus in which phosphorushas the lowest oxidation state is

The alum used for purifying water is

For the chemical reaction,$3 X ( g) + Y ( g) \rightleftharpoons \, X_3 \, Y $ ( g) the amount of $X_3 Y$ at equilibrium is affected by

Which of the following metals is present in brass, bronze and german-silver?

How many g of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 normality ?

Bell-metal is an alloy of

Aldol condensation will not take place in