EASY
JEE Main
IMPORTANT
Earn 100

The number of significant figures in is _________

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Important Questions on Some Basic Concepts of Chemistry
MEDIUM
JEE Main
IMPORTANT
Consider the complete combustion of butane, the amount of butane utilized to produce of water is ______ . (in nearest integer)

MEDIUM
JEE Main
IMPORTANT
Consider titration of solution versus oxalic acid solution. At the end point following burette readings were obtained.
(i)
(ii)
(iii)
(iv)
(v)
If the volume of oxalic acid taken was then the molarity of the solution is ___. (Rounded-off to the nearest integer)

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JEE Main
IMPORTANT
of aniline completely reacts to form acetanilide. of the product is lost during purification. Amount of acetanilide obtained after purification (in ) is ___________

MEDIUM
JEE Main
IMPORTANT
Methylation of of benzene gave of toluene. Calculate the percentage yield of toluene (Nearest integer)

EASY
JEE Main
IMPORTANT
equimolar mixture of and contains of and of The value of is (Nearest integer)

EASY
JEE Main
IMPORTANT
When of an organic compound was analyzed using Carius method for estimation of bromine, of was obtained. The percentage of bromine in the organic compound is _________.(Nearest integer)
[Atomic mass : Silver Bromine ]

MEDIUM
JEE Main
IMPORTANT
of was added to of . The number of unreacted molecules in the solution after the complete reaction is p. Find out p
(Nearest integer)

MEDIUM
JEE Main
IMPORTANT
The ratio of the mass percentages of ' & ' and ' & ' of a saturated acyclic organic compound '' are and respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound '' is_______
