The reason for “drug induced poisoning” is :
Binding reversibly at the active site of the enzyme
Bringing conformational change in the binding site of enzyme
Binding irreversibly to the active site of the enzyme
Binding at the allosteric sites of the enzyme
A mixture containing the following four compounds is extracted with 1M HCl. The compound that goes to aqueous layer is :
A solution containing a group-IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :
The number of S=O and S−OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :
(2 and 2) and (2 and 2)
(2 and 4) and (2 and 4)
(4 and 2) and (2 and 4)
(4 and 2) and (4 and 2)
A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reaction with water produces a gas ‘B’. Gas ‘B’ reacts with an aqueous solution of CuSO4 to form a deep blue compound. ‘M’ and ‘B’ respectively are :
Li and NH3
Ba and N2
Na and NH3
Al and N2
Consider the following standard electrode potentials (E0 in volts) in aqueous solution :
Based on these data, which of the following statements is correct ?
Tl+ is more stable than Al3+
Al+ is more stable than Al3+
Tl+ is more stable than Al+
Tl3+ is more stable than Al3+
Consider the following ionization enthalpies of two elements ‘A’ and ‘B’.
Which of the following statements is correct ?
Both ‘A’ and ‘B’ belong to group-1 where ‘B’ comes below ‘A’.
Both ‘A’ and ‘B’ belong to group-1 where ‘A’ comes below ‘B’.
Both ‘A’ and ‘B’ belong to group-2 where ‘B’ comes below ‘A’.
Both ‘A’ and ‘B’ belong to group-2 where ‘A’ comes below ‘B’.
In which of the following reactions, hydrogen peroxide acts as an oxidizing agent ?
HOCl + H2O2 → H3O+ + Cl− + O2
I2 + H2O2 + 2OH− → 2I− + 2H2O+O2
2MnO-4 +3H2O2 →2MnO2 + 3O2+2H2O+2OH-
PbS+4H2O2 → PbSO4+4H2O
Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.
O3 and CO2
CO2 and NO2
SO2 and NO2
SO2 and O3
sp3d2 hybridization is not displayed by :
The pair of compounds having metals in their highest oxidation state is :
MnO2 and CrO2Cl2
[NiCl4]2− and [CoCl4]2−
[Fe(CN)6]3− and [Cu(CN)4]2−
[FeCl4]− and Co2O3
Which of the following is paramagnetic ?
The rate of a reaction A doubles on increasing the temperature from 300 to 310 K. By how much, the temperature of reaction B should be increased from 300 K so that rate doubles if activation energy of the reaction B is twice to that of reaction A.
In a diffraction pattern due to a single slit of width 'a', the first minimum is observed at an angle 30° when light of wavelength is incident on the slit. The first secondary maximum is observed at an angle of:
Which one of the following pairs of structures is correctly matched with their correct description
Fastest distribution of some injectible material / medicine and with no risk of any kind can be achieved by injecting it into the
Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with
Components : (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Cell vacuole (viii) Nucleus The correct components are
A - (i) , B-(iv) , C-(viii) , D-(vi)
A-(vi), B-(v),C-(iv), D-(vii)
A-(v), B-(i), C-(iii), D-(ii)
A-(v), B-(iv) ,C-(viii), D-(iii)
For current entering at A, the electric field at a distance ‘r’ from A is
A student measures the focal length of convex lens by putting an object pin at a distance ‘u’ from the
lens and measuring the distance ‘v’ of the image pin. The graph between ‘u’ and ‘v’ plotted by the
student should look like
The quadratic equations x2 - 6x + a = 0 and x2 - cx + 6 = 0 have one root in common. The other roots
of the first and second equations are integers in the ratio 4 : 3. Then the common root is