Which of the following has maximum hydrogen bonding?
Which of the following cannot be produced by dehydration of alcohols?
In the following reaction ,product P is
The total number of possible values of magnetic quantum number for the value of l = 3 is
The quantum number values for the designation 3d are
ACTH is secreted by
Vanaspati ghee is prepared by which of the following reactions of vegetable oils?
The fatty acid which shows reducing property is
The molecule having zero dipole moment is
The oxidation of SO₂ by O₂ to SO₃ is an exothermic reaction. The yield of SO₃ will be maximum if
The reaction N₂ + O₂ → 2NO is endothermic . The forward reaction is
An endothermic reaction A → B has an activation energy 15 kcal/mole and energy of reaction 5 kcal/mole. The activation energy of the reaction B → A is
A first order reaction is 10% complete in 20 min. The time taken for 19% completion is
Electron affinity depends on
As the size of the atom increases, the electron affinity decreases, whereas when the nuclear charge increases the electron affinity increases.
The radii of F, F -, O and O2- are in the ordera
As we move from left to right in a period atomic radius decreases. Moreover, as the number of electrons in anion increases, the effective nuclear charge and attractive force on the outer electrons decreases. Thus, the anion with highest charge always possess largest ionic radius.
Which of the following is an antibiotic?
Which of the following holds good to the laws of thermodynamics for the reaction C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(l)
Medicine which is an antibiotic is
The cell reaction of the cell is Mg(s) + Cu+2 (aq) → Cu(s) + Mg+2 (aq). If the standard reduction potential of magnesium and copper are -2.37 V and +0.34V respectively, the standard EMF of the cell is
The arrangement of hydrogen atoms around carbon in the methane molecule is
The e.m.f. of a galvanic cell with electrode potentials of Al equal to -1.66 V and that of Mg equal to - 0.54 V is
E.M.F. can be positive only if oxidation takes place at Mg-electrode. But here the reduction reaction takes place.
The ionic mobility of alkali metal ions in aqueous solution is maximum for
Strongest bond is in between
Main process for the manufacture of sodium carbonate is
Which one of the following substances is used in the laboratory for a fast drying of neutral gases?
Benzene on treatment with a mixture of conc.HNO₃ and conc. H₂SO₄ at 100°C gives
When acetylene is passed through dil. H₂SO₄ in the presence of HgSO₄, the compound formed is
In which of the following acid-base titration, pH is greater at eqivalence point?
H₂O₂ is commonly prepared in lab. by the reaction of
When a slow neutron goes sufficently close to a U-235 nucleus, then the process which takes place is called
A radioactive nucleus emits a β-particle. The parent and the daughter nuclei are
The half-life of a radioactive isotope is 2.3 hours. Its disintegration constant will be
Wet ether is not used as a solvent in Wurtz reaction, because the water present in it
Which of the following will exhibit tautomerism?
Which of the following is least basic?
Nitrogen is relatively inactive element because
Boric acid is polymeric due to
Which would quickly absorb oxygen?
When lightning flash is produced through air, the gas formed is
Nylon-6,10 is a condensation polymer of hexamethylenediamine and
Which is not a macromolecule?
When iron is added to CuSO₄ solution, copper is precipitated. It is due to
Water is a/an
Azeotropic mixtures are
The temperature at which real gases obey the ideal gas laws over a wide range of pressure is called
An ideal gas cannot be liquefied because
Brownian movement is found in
Indicate the mineral from which copper is manufactured
Bell metal is an alloy of
Near the top of the blast furnace used for the extraction of iron, the metal oxides are reduced to spongy iron by