Hydrogen bonding is maximum in
Catalyst used in Rosenmund reduction is
Which of the following does not have sp2-hybridised carbon?
The total number of electrons present in all the s-orbitals, all the p-orbitals and all the d-orbitals of cesium ion are respedtively
The effect of atoms or groups losing electrons towards a carbon atom is called
The number of significant figures in 40.00 is
The weight of one molecule of a compound C₆₀H₁₂₂ is
The Molecule iS C₆₀H₁₂₂
Molecular mass of C₆₀H₁₂₂ --- [60x12+1x122]
=842 Unified mass
Weight of one molecule of C₆₀H₁₂₂ :
=molecular weight of C₆₀H₁₂₂ / Avogadro's number
∴The weight of a molecule of a compound C₆₀H₁₂₂ is 1.4x10⁻²¹ g
Which one of the following statements is true for proteins?
The no. of unpaired electrons in Mn2+ is
The alcohol obtained by the hydrolysis of oils and fats is
Which of the following is paramagnetic species?
The heat of neutralisation is maximum when
Reaction of acids with alcohols is also known as
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled then the equilibrium constant will
Which one of the following is an incorrect statement?
The electron affinity of fluorine is unexpectedly less than that of Cl. Because the size of F atom is quite small, as a result, the electron-electron repulsions in the relatively compact 2p-subshell are comparitively large and hence the incoming electron is not accepted with the same ease as in the case with Cl.
The rate of a gaseous reaction is given by the expression K [A][B]. If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume, the reaction rate relating to original rate will be
The no. of unpaired electrons in the complex ion [CoF₆]3⁻ is (Atomic no. Co = 27)
The law formulated by Nernst is
2, 4, 6-Trinitrophenol is a/an
The group of elements which are not transition elements but are discussed with them is
Which of the following is formed when K₂Cr₂O₇ reacts with concentrated H₂SO₄ in cold?
A depolariser used in dry cell is
Marsh gas contains which of the following
Which one of the following is explosive and readily hydrolysed?
The first product obtained during fractional distillation of petroleum is
Which of the following is a strong electrolyte?
In the keto-enol tautomerism of dicarbonyl compounds the enol form is preferred in contrast to the keto form, this is due to
Chlorobenzene on heating with aq NH₃ under pressure in the presence of cuprous chloride gives
BF₃ acts as an acid according to the concept of
Nitrogen is relatively inactive element because
A metal X on heating in nitrogen gas gives Y, Y on treatment with H₂O gives a colourless gas which when passed through CuSO₄ soution gives a blue colour. Y is
In diborane, the two H - B - H angles are nearly
What are the products formed when an aqueous solution of magnesium bicarbonate is boiled
One of the oxidants used with liquid propellants is
Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% CaCl₂ because
Benzene and toluene form nearly ideal solutions. At 20oC, vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20oC for a solution containing 78 g of benzene and 46 g of toluene is ___ torr.
The turbidity of a polymer solution measures
Which of the following has Frenkel defects?
X litres of CO is present at STP. It is completely oxidised to CO2. The volume ofCO2 formed is 11.2 litres at STP. What is the value of X.
The adsorption of solids, from a solution, is called