List of top Chemistry Questions

The uncertainty in momentum of an electron is $1\times 10^{-5} kg m/s.$ The uncertainty in its position will be (Given, $h = 6.62 \times 10^{-34} kg m^2/s)$
Gammexane is
Amides can be converted into amines by a reaction named after
At $25^\circ $C and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?
Cassiterite is an ore of
How many g of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 normality ?
In Friedal-Craft's alkylation besides $AlCl_3$ the other reactants are
Natural rubber is a polymer of
Purification of aluminium by electrolytic refining is called
Terylene is a condensation polymer of ethylene glycol and
The Minamata disease in Japan was caused through the pollution of water by
The type of hybridization of boron in diborane is
Which of the following configuration is correct for iron?
The most suitable method of the separation of a mixture of ortho and para nitrophenol mixed in the ratio of 1 : 1 is
Ethyl chloride is converted into diethyl ether by
Aldol condensation will not take place in
Bell-metal is an alloy of
Metals having $ \text{n}{{\text{s}}^{\text{1}}} $ the valence electronic configuration:
p-orbitals in a given shell can accommodate upto:
Which of the following has minimum ionization energy?
The boiling points of the following hydrides follow the order of
The Lassaignes solution of an organic compound with nitrogen; sulphur and chlorine contains:
A vessel contains equal volumes of $ \text{S}{{\text{O}}_{\text{2}}} $ and $ \text{C}{{\text{H}}_{4}}. $ Through a small hole the gases effused into vacuum. After 200 seconds the total volume is reduced to half. What is the ratio of $ \text{S}{{\text{O}}_{\text{2}}} $ and $ \text{C}{{\text{H}}_{\text{4}}} $ remaining in the vessel?
Which of the following form of sulphur can be prepared by pouring liquid sulphur into cold water?
The dielectric constants of $ {{\text{H}}_{\text{2}}}\text{O} $ and $ {{\text{D}}_{\text{2}}}\text{O} $ are 82 and 80.5 respectively. Therefore, the solubility of NaCI in $ {{\text{D}}_{\text{2}}}\text{O} $ is ...... than in water: