Maths-
General
Easy
Question
In the given figure of squares, 6 A’s should be written in such a manner that every row contains at least one 'A', it is possible in number of ways is-
- 24
- 25
- 26
- 27
The correct answer is: 26
Related Questions to study
chemistry-
Oxidation of metals is generally a slow electrochemical reaction involving many steps. These steps involve
electron transfer reactions. A particular type of oxidation involve overall first order kinetics with respect to fraction of unoxidized metal surface thickness (1ñf) relative to the maximum thickness (T) of oxidized surface, when metal surface is exposed to air for a considerable period of time.
Rate law :
where f = x / T,
x = thickness of the oxide film at time ' t' and T= thickness of the oxide film at t =h
For the oxidation of a particular metal, a graph is shown in the figure.
The exponential variation of f with t (h)is
Oxidation of metals is generally a slow electrochemical reaction involving many steps. These steps involve
electron transfer reactions. A particular type of oxidation involve overall first order kinetics with respect to fraction of unoxidized metal surface thickness (1ñf) relative to the maximum thickness (T) of oxidized surface, when metal surface is exposed to air for a considerable period of time.
Rate law :
where f = x / T,
x = thickness of the oxide film at time ' t' and T= thickness of the oxide film at t =h
For the oxidation of a particular metal, a graph is shown in the figure.
The exponential variation of f with t (h)is
chemistry-General
chemistry-
Oxidation of metals is generally a slow electrochemical reaction involving many steps. These steps involve electron transfer reactions. A particular type of oxidation involve overall first order kinetics with respect to fraction of unoxidized metal surface thickness (1ñf) relative to the maximum thickness (T) of oxidized surface, when metal surface is exposed to air for a considerable period of time.
Rate law :
where f = x / T,
x = thickness of the oxide film at time ' t' and T= thickness of the oxide film at t =
For the oxidation of a particular metal, a graph is shown in the figure.
The time taken for thickness to grow 50% of Tis
Oxidation of metals is generally a slow electrochemical reaction involving many steps. These steps involve electron transfer reactions. A particular type of oxidation involve overall first order kinetics with respect to fraction of unoxidized metal surface thickness (1ñf) relative to the maximum thickness (T) of oxidized surface, when metal surface is exposed to air for a considerable period of time.
Rate law :
where f = x / T,
x = thickness of the oxide film at time ' t' and T= thickness of the oxide film at t =
For the oxidation of a particular metal, a graph is shown in the figure.
The time taken for thickness to grow 50% of Tis
chemistry-General
chemistry-
For a particular reaction at constant temperature , A(g) +2B(g) Following rate information were recorded:
On the basis of following observation give the answer of the following questions
What is the rate of reaction in the 4th experiment?
For a particular reaction at constant temperature , A(g) +2B(g) Following rate information were recorded:
On the basis of following observation give the answer of the following questions
What is the rate of reaction in the 4th experiment?
chemistry-General
chemistry-
For a particular reaction at constant temperature , A(g) +2B(g) Following rate information were recorded:
On the basis of following observation give the answer of the following questions
Which of the following is the correct rate law for the given reaction?
For a particular reaction at constant temperature , A(g) +2B(g) Following rate information were recorded:
On the basis of following observation give the answer of the following questions
Which of the following is the correct rate law for the given reaction?
chemistry-General
chemistry-
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n =h is called binding energy of that state. Binding energy of ground state =E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
If ionisation energy is 'a' eV then ionisation potential is 'a' V. Using this information, find the ionisation potential of givenspecies.
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n =h is called binding energy of that state. Binding energy of ground state =E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
If ionisation energy is 'a' eV then ionisation potential is 'a' V. Using this information, find the ionisation potential of givenspecies.
chemistry-General
chemistry-
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n = is called binding energy of that state. Binding energy of ground state = E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
What is the binding energy of e from second state in the given species?
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n = is called binding energy of that state. Binding energy of ground state = E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
What is the binding energy of e from second state in the given species?
chemistry-General
chemistry-
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n = is called binding energy of that state. Binding energy of ground state = E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
Identify the hydrogen likespecies.
(Energy of electron in nth orbit of hydrogen like species having atomic
I) Ground state:
Lowest energy state of any atom or ion is called ground state of the atom It is n = 1.
II) Excited State :
States of atom other than the ground state are called excited states:
III) Ionisation energy (E):
Minimum energy required to move an electron from ground state to n = is called ionisation energy of the atom or ion.
i) Excitation Energy:
Energy required to move an electron from ground state of the atom to any other state of the atom is called
excitation energy of that state.
Excitation energy of 2ndstate = excitation energy of 1stexcited state = 1stexcitation energy = E2 ñ E1
ii) Binding EnergyëoríSeperationEnergy:
Energy required to move an electron from any state to n = is called binding energy of that state. Binding energy of ground state = E. of atom or on.
The third excitation energy of a hydrogen like species is 204 eV.
Identify the hydrogen likespecies.
chemistry-General
chemistry-
Consider the following first order decomposition and the accompanying concentration ñ time plot: 
(log 2 = 0.3, log 5 =0.7)
Consider the following first order decomposition and the accompanying concentration ñ time plot: (log 2 = 0.3, log 5 =0.7)
chemistry-General
chemistry-
The angular momentum of an electron in a Bohr’s orbit of H-atom is 4.2178 × 10-34kgm2/sec. Calculate the wavelength of the spectral line emitted when electrons falls from this level to next lowerlevel.
The angular momentum of an electron in a Bohr’s orbit of H-atom is 4.2178 × 10-34kgm2/sec. Calculate the wavelength of the spectral line emitted when electrons falls from this level to next lowerlevel.
chemistry-General
chemistry-
The half-life of 99Tc is 6.0 h. The total residual activity in a patient after receiving an injection containing 99Tc must not be more than 0.01 Ci, after 36.0 hours. What is the maximum activity (in Ci) that the sample injected can have?
The half-life of 99Tc is 6.0 h. The total residual activity in a patient after receiving an injection containing 99Tc must not be more than 0.01 Ci, after 36.0 hours. What is the maximum activity (in Ci) that the sample injected can have?
chemistry-General
chemistry-
The reaction
Product, is zero order reaction while the reaction B Product, is first order reaction. For what initial concentration of A are the half lives of the two reactions equal ?
The reaction Product, is zero order reaction while the reaction B Product, is first order reaction. For what initial concentration of A are the half lives of the two reactions equal ?
chemistry-General
chemistry-
The time of decay for thermonuclear reaction is given by t = 5 × t1/2. The relation between mean life T and time of decay t is given by:
The time of decay for thermonuclear reaction is given by t = 5 × t1/2. The relation between mean life T and time of decay t is given by:
chemistry-General
chemistry-
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among thestereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
Composition of equilibrium mixture is:
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among thestereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
Composition of equilibrium mixture is:
chemistry-General
chemistry-
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among thestereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
Thepercentageofracemicmixturepresentintheequilibriummixtureis:
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among thestereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
Thepercentageofracemicmixturepresentintheequilibriummixtureis:
chemistry-General
chemistry-
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among the stereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
The percentage purity of the equilibrium mixture is:
Thecompoundshowsbelowinthediagram,ontreatmentwithacidcatalystisomerizesandequilibriumis established among the stereoisomers.
The equilibrium mixture contains all the three stereoisomers of this compound. Specific rotation of pure dextro isomer is +62° while the specific rotation of the equilibrium mixture is + 22°. Also the equilibrium mixture contains 20% of the meso isomers. Answer the following three qeustions based on the above information.
The percentage purity of the equilibrium mixture is:
chemistry-General
