With oxalic acid, glycerol at 503 K gives
Acetyl salicylic acid is used as
The rate of the reaction
is fastest when Z is
The maximum number of electrons in a subshell is given by the expression
The Bohr's theory was modified to give the concept of elliptical orbits by
Which is an essential constituent of a diet?
Identify the correct statement regarding enzymes.
Vinegar made from cane sugar, now-a-days synthetically contains
In the resonating structure of benzene the number of σ and π bond are
A characteristic feature of reversible reactions is that they
A cylinder filled with a movable piston contains liquid water in equilibrium with water vapour at 25°C. Which one of the following operations results in a decreace in the equilibrium vapour pressure ?
A reaction with respect to the reactant A has a rate constant of 5 s⁻1. If we start with[A]= 10 mol-L⁻1, then in what time the concentration of A becomes 1.0 mol-L⁻1?
A catalyst is used to
Which of the following is not isoelectronic?
Isoelectronic species: a group of ions, atoms, or molecules that have the same number of electrons.
Number of electrons in Na+ = 10
Number of electrons in Mg2+ = 10
Number of electrons in O2 − = 10
Number of electrons in Cl − = 18
Which of the following has highest first ionization potential?
Nitrogen has highest first ionization potential. This is because N contains exactly half-filled p-orbitals which is extra stable. hence its first ionisation potential is high.
Electronic configuration of N:
Which of the following compound contains both the oxidiser and the fuel elements in the same molecule?
An adiabatic expansion of an ideal gas always has
Azo dyes are prepared from
Of the five isomeric hexane,the isomers which can give two monochlorimated compound is
The pH of aqueous KCl solution is 7.0. This solution was electrolysed for a few seconds using Pt electrodes. Which of the following is correct?
The reaction 1/2 H₂(g) + AgCl(s) → H⁺(aq) + Cl- (aq) + Ag(s) occurs in the galvanic cell
Cassiterite is an ore of
Which of the following has the highest conductivity?
Which halide has highest melting point?
A metal X on heating in nitrogen gas gives Y. Y on treatment with H₂O gives a colourless gas which when passed through CuSO₄ solution gives a blue colour. Y is
Which of the following compounds is acidic
1-Chlorobutane on reaction with alcoholic potash gives
Hardness of water is due to which pair of ions?
Which of the following is a weak electrolyte?
Isotopes of elements were discovered by
In case of a radioisotope, the value to T1/2 and λ are identical in magnitude. The value is
Heaviest particle is
Which of the following is called Sandmeyer reaction ?
When ammonia is passed over heated copper oxide, the metallic copper is obtained. The reaction show that ammonia is
Which of the following statement is correct with respect to the property of elements with increase in atomic no. in the carbon family?
Which of the following is a nitric anhydride?
The strongest base among the following is
When potassium ferrocyanide crystals are heated with conc. H₂SO₄, the gas evolved is
The process of volcanisation was introduced by
Which of the following is not a synthetic polymer?
Which of the following radicals can bring about the highest oxidation state of a transition metal ?
1.0 g of pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction. The strength of HCl solution is given by
The osmotic pressure of 5% (mass-volume) solution of cane sugar at 150°C (mol. mass of sugar = 342) is
IdentifyX in the sequence given below :
The density of a gas at 27°C and 1 atm is d. Pressure remaining constant, at which of the following temperatures will its density become 0.75d?
An ideal gas cannot be liquified because
The reactions in zeolite catalysts depend upon
Transition metals are often paramagnetic owing to
Titanium shows magnetic moment of 1.73 B.M. in its compound. What is the oxidation number of Ti in the compound ?
Rusting of iron is catalysed by