An organic compound 'X' on treatment with acidified K₂Cr₂O₇ gives a compound 'Y' which reacts with I₂ and sodium carbonate to form triodomethane. The compound 'X' could be
Which of the following compounds does not react with NaHSO₃ ?
Reaction of alkyl halide with alcoholic KOH is called
The reagent which forms crystalline osazone derivative when reacted with glucose is
Which one of the following molecules has the highest dipole moment ?
When HNO₃ is dropped into the palm and washed with water, it turns yellow. It shows the presence of
The compound/ion which is used in the nitration of benzene is
The total number of possible values of magnetic quantum number for the value of l = 3 is
How many moles of Helium gas occupy 22.4 L at 0°C at 1 atm. pressure?
Carboxylic acids are more acidic than phenol and alcohol because of
Number of sigma bonds in P₄O₁₀ is
The rate constant of a reaction depends on
One gram sample of NH4NO3 is decomposed in a bomb-calorimeter. Temperature of the calorimeter increases by 6.12 K. Heat capacity of the system is 1.23 KJ-g-1 - deg-1. What is the molar heat of decomposition for NH4NO3 is
ΔU = - 6.12 x 1.23 x GMM (NH4NO3)
= - 6.12 x 1.23 x 80 = - 602.208 kJ mol-1
A chemical reaction is catalyzed by a catalyst X. Hence X
In the reaction CH2COOHaq + OH(aq) → CH3COO- + H2O(l) ; ΔH = -55.2kJ mol-1. What is the heat of dissociation (in kJ mol-1) of acetic acid?
ΔH = -55.2 KJ.mol-1
-[H+ (aq) + OH- (aq) → H2O(l) ΔH = -57.3 KJ .mol-1]]
CH2COOHaq → CH3COO- (aq) + H+ (aq) ΔH = ?
CH2COOH(aq) + OH- (aq) → CH3COO- (aq) + H2O(l) ΔH = -55.2 KJ .mol-1
-H+ + OH- (aq) → - H2O(l) ΔH = + 57.3KJ .mol-1
CH3COOH(aq) → CH3COO- (aq) + H+(aq) ΔH = 2.1 KJmol-1
One of the most widely used drug in medicine iodex in
IUPAC name of
Conductivity (Unit : siemen's S) is directly proportionally to the area of the vessel and the concentration of the solution in it and is inversely proportional to the length of vessel, then the unit of constant of proportionality is
Which of the following metal requires radiation of highest frequency to cause emission of electrons?
As the alkali metals have minimum ionisation potential in the periodic table, secondly ionisation potential decreases on moving top to bottom in periodic table, thus Mg has highest ionisation enthalpy among the given elements, hence it requires radiation of highest frequency to cause emission of electrons.
A real gas most closely approaches the behaviour of an ideal gas at
Benzene reacts with n-propyl chloride in the presence of anhydrous AlCl₃ to give predominantly
Hydrogen ion concentration of 0.2 M CH₃COOH, which is 40% dissociated, is
In which of the following separation method only one enantiomer is recovered from the racemic mixture?
Bismuth is the end product of radioactive disintegration series known as
Which of the following is a strongest base?
The reduction of benzoyl chloride with H₂/Pd-BaSO₄ produces
Which of the following is an example of natural polymer?
Molecular mass of a volatile substance may be obtained by
Which is the strongest reducing agent ?
Which of the following is anti-ferromagnetism?
30 ml of solution is neutralised by 15 ml of 0.2 N base. The strength of the acid solution is
Which comparison is not correct as indicated?
The vapour pressure of water at 300 K in a closed cotainer is 0.4 atm. If the volume of container is doubled. The vapour pressure at 300 K will be
In which one of the following reactions does SO3 acts as an oxidising agent reaction with
Which of the following is used for the destruction of colloids?