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Which of the following species can act both as Bronsted acid and base ? NH₂⁻ 2. HCO₃⁻ 3. NH₄⁺ 4. HSO₄⁻ Select the correct answer using the codes given below :
Acetone and acetaldehyde are differentiated by
Acetaldehyde gives silver mirror with Tollen's reagent
CH3CHO + 2[Ag(NH3)2] OH → CH3COONH4 + 2Ag + H2O + 3NH3
Acetone does not give this test
Which of the following is not a preliminary test used to detect ions
The wavelength of light waves is inversely proportional to its
Which of the following alkyl group has the maximum + I effect?
The enzymes which convert glucose and fructose into ethyl alcohol is
The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 KJ mol⁻¹ respectively .The enthalpy of formation of carbon monoxide per mol is
A glass bulb is filled with NO₂ gas and immersed in an ice bath at 0°C which becomes colourless after some time . This colourless gas will be
Units of rate constant for first and zero order reaction in terms of molarity (M) units are resectively
The soaps are salts of higher fatty acids containing chains of
2,4 Dinitrophenyl hydrazine is an example for :
is a monodentate ligand.
The process associated with manufacture of sodium carbonate is known as
The density of gas at 27°C and 1 atm is d. Pressure remaining constant at which of the following temperatures will its density become 0.75 d ?
At same pressure and same number of moles¸
What is formed when boron is heated with concentrated H₂SO₄?
Which one of the following substances is used in the laboratory for a fast drying of neutral gases?
Which of the following isomerism is not exhibited by alkanes?
Heaviest particle is
The crystal system of a compound with unit cell dimensions a=0.387, b=0.387 and c=0.0504 nm and α = β = 90°and γ = 120°is
In the Fischer projection formula, the representation of meso-butane-2,3-diol is :
Among the following, the least stable resonance structure is
The resonance structure, in which the positive charges are present on the adjacent atoms, is expected to be least stable.
Which one of the following reactions of xenon compounds is not feasible?
Which of the following has an optical isomer?
Which of the following sulphides undergoes self-reduction ?
What is the best reagent to convert isopropyl alcohol to isopropyl bromide?
Thionyl bromide will react with secondary alcohols and give a reasonable percent yield of the bromide.
In which of the following cases entropy increases?