19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Arrange the following compounds in decreasing order of their boiling points. CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3
Which of the following is the industrial method of preparation of acetaldehyde?
Complete the reaction: Ph −CH = CH −CHO PhMgBr/H3O+ → Product
A and B are respectively.
Which of the following on heating with aqueous KOH, produces acetaldehyde ?
When but-2-yne is treated dil.H2SO4/HgSO4 the product formed is :
Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde?
Which of the compounds with molecular formula C5H10 yields acetone on ozonolysis?
Which compound would give 5 – keto – 2 – methyl hexanal upon ozonolysis? (a) (b) (c) (d)
Which of the following yield 2 moles of formaldehyde on ozonolysis?
On reductive ozonolysis yields
Which of the following compound will yield 2,5- dimethylhexan-1,6-dial upon ozonolysis?
Which of the following forms an enol to the greatest extent ? (a) (b) (c) (d)
Which of the compound shown is (are) correctly named as pentane derivates, either as pentanals or pentanones ?
When enolate A is compared with enolate B (A) (B) which of the following statements is true ?
Which of the following is paradehyde?
Ethanedial has which functional group ?
The structure would be best classified as a(n)
Energy of electron of hydrogen atom in the second Bohr orbit is
The Bohr orbit radius for hydrogen atom (n = 1) is 0.529 Å. The radius for the first excited state (n = 2) orbit is
According to Bohr model, angular momentum of an electron in the 3rd orbit is
Electronic energy is negative because
The value of a₀ (Bohr radius) in the expression for the radius of nth orbit of hydrogen atom (rₙ = n²a₀) is
When electrons of a hydrogen atom return to the L shell (n=2) from higher energy shells, the series of lines formed is called
According to Bohr's theory, the angular momentum of an electron in 5th orbit is