A compound X undergoes reduction with LiAlH₄ to yield Y. When vapours of Y are passed over freshly reduced copper at 300°C. X is formed. What is Y?
Schiff's reagent is
Which of the following element is responsible for oxidation of water to O₂ in biological processes?
Which one of the following has the minimum boiling point?
The compound formed in the borax bead test of Cu2⁺ ion in oxidising flame is
The reacting ion in the nitration of benzene is
Our sun belongs to which of the following spectra?
The most stable carbonium ion is:
Consider the following compounds :
2. CH₂ = C = O
Those compounds which would generate a carbene on exposure to ultraviolet light include :
Which of the following molecules has the highest dipole moment?
Which of the following bonds has highest average bond energy ?
The pieces of wood burn faster than a log of wood of the same mass, because
The reaction N₂ + O₂ → 2NO is endothermic . The forward reaction is
The reaction of chloroform with alcoholic KOH and p-toludine forms
An exothermic reaction is one in which the reacting substances
Substances which bring body temperature down are known as
In which of the following compounds,carbon uses sp3 hybrid orbitals only for bonding ?
The standard reduction potential at 298 K for the following half cell reaction are given below
Which one is the strongest reducing agent?
Which of the following is correctly matched?
C-Cl bond length is 0.176 nm; ionic radii of Na+ and F - are 0.095 and 0.136 nm respectively; C-C bond length is 0.154 nm.
At what temperature will the average speed of CH₄ molecules have the same value as O₂ has at 300 K
Select the true statement about benzene from amongst the following
The pH indicators are
Which of the following is not isomeric with diethyl ether?
A human body required 0.01 μC activity of radioactive substance for 24 hrs. Half life of radioactive substance is 6 hours. Then injection of maximum activity of radioactive substance (in μC) can be injected is
Aniline in a set of reactions yielded a product D
The structure of D is
Dow's reaction involves
Select incorrect statement:
In a polymer 30% molecules have molecular weight 20,000, 40% molecules have molecular weight 30,000 and the rest 30% molecules have molecular weight 60000. The weight average molecular weight of the polymer is
In paper chromotagraphy,
The oxidation number of Mn in KMnO₄ is
Semiconductors are derived from compounds of
Which acetone and chloroform are mixed, hydrogen bonding takes place between them. Such a liquid pair will cause
In a flask of volume V litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1 mole of NH₃ and 0.3 mol of He are enclosed at 27°C. If the total pressure exerted by these non reacting gases is one atmosphere, the partial pressure exerted by nitrogen is
How much quick lime can be obtained from 25 gm of CaCO₃ ?
The reactions in zeolite catalysts depend upon