Description : Assertion:- `N_(2)^(+)` is more stable than `N_(2)^(-)` Reason:- `N_(2)^(+)` has less electrons in antibonding orbital .
Last Answer : Assertion:- `N_(2)^(+)` is more stable than `N_(2)^(-)` Reason:- `N_(2)^(+)` has ... the Reason is False. D. If both Assertion & Reason are false
Description : The nuclei of heavy atoms generally contain: w) more electrons than neutrons x) more protons than electrons y) more neutrons than electrons z) more orbitals than electrons
Last Answer : ANSWER: Y -- MORE NEUTRONS THAN ELECTRONS
Description : The number of `pi` molecular orbitals completely filled in the ground state of benzene is :
Last Answer : The number of `pi` molecular orbitals completely filled in the ground state of benzene is : A. three B. one C. six D. none
Description : What Molecular orbital interactions are not possible because the atomic orbitals have overlapping electron densities.?
Last Answer : Need answer
Description : The order of energy level of molecular orbitals in H3 species in a. 1σ < 2σ = 3σ b. 1σ >2σ = 3σ c. 1σ =2σ < 3σ d. 1σ < 2σ < 3σ
Last Answer : d. 1σ < 2σ < 3σ
Description : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds the electrons, from 5p orbitals are excite
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these ... B. Square pyramid C. square planar D. octahedral
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds ... `XeF_(2)` and tetraheddral `XeO_(3)`
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds the ... ` C. `XeO_(2)F_(2)` D. Xe
Description : The number of electrons of a neutral atom is automatically known if one knows the? A. Atomic number (Answer) B. Atomic weight C. Number of orbitals D. none
Last Answer : A. Atomic number (Answer)
Description : In the filling of electron orbitals for the elemen sulfur, which has 16 electrons, the number of electrons in the 3p orbitals is: w) 3 x) 4 y) 6 z) 0
Last Answer : ANSWER: X -- 4
Description : Which of the following complex ions has electrons that are symmetrically filled in both `t_(2g) and e_(g)` orbitals ?
Last Answer : Which of the following complex ions has electrons that are symmetrically filled in both `t_(2g) and e_(g)` orbitals ? A ... D. `[Co(NH_(3))_(6)]^(2+)`
Description : The pair of electrons in the given carbanion, `CH_(3)C-=C^(Theta)` is present in which of the following orbitals?
Last Answer : The pair of electrons in the given carbanion, `CH_(3)C-=C^(Theta)` is present in which of the following orbitals? A. ... ` B. `sp^(2)` C. `2p` D. `sp`
Description : What is Aufbau’s principle? How it helps to fill electrons in an atom in different orbitals?
Last Answer : Ans Electrons are filled in orbitals of an atom according to increasing energies which is in accordance to (n+l) values of electrons. If (n+l )values are same the electron goes to orbital having lower value of n.
Description : Where are the two lone pairs of electrons of the oxygen atom in an alcohol molecule located? (a) in two p orbitals (b) in two sp orbitals (c) in two sp2 orbitals (d) in two sp3 orbitals
Last Answer : in two sp3 orbitals
Description : Which of the following statements is correct regarding nucleophiles? (a) They have an overall positive charge (b) They have a lone-pair of electrons (c) They have an unpaired electron (d) They have empty orbitals
Last Answer : (b) They have a lone-pair of electrons
Description : A : In oxygen maximum covalency limits to four F : Absence of d - orbitals
Last Answer : A : In oxygen maximum covalency limits to four F : Absence of d - orbitals A. Both A and R are true ... true R is false D. A is false but R is true
Description : According to Avogadro's law A. the product of the gas constant and the molecular mass of an ideal gas is constant B. the sum of partial pressure of the mixture of two gases is sum of the ... all gases, at the same temperature and pressure, contain equal number of molecules D. all of the above
Last Answer : Answer: C
Description : In glycolysis, during oxidation electrons are removed by (a) ATP (b) glyceraldehyde-3-phosphate (c) NAD+ (d) molecular oxygen.
Last Answer : (c) NAD+
Description : Pyrrole is less basic than pyridine because the lone-pair of electrons on Natom in pyrrole (a) is part of the delocalized π molecular orbital. (b) is not part of the delocalized π molecular orbital. (c) resides in sp2 hybrid orbital (d) resides in sp hybrid orbital
Last Answer : is part of the delocalized π molecular orbital.
Description : Pyridine has a delocalized π molecular orbital containing (a) 4 electrons (b) 6 electrons (c) 8 electrons (d) 12 electrons
Last Answer : 6 electrons
Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases
Last Answer : ANSWER: X -- FREE RADICALS
Description : Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons
Last Answer : ANSWER: Z -- HAS UNPAIRED ELECTRONS
Description : A hydrocarbon contain `80%` C . The vapour density of compound in 30 . Molecular formula of compound is :-
Last Answer : A hydrocarbon contain `80%` C . The vapour density of compound in 30 . Molecular formula of compound is :- A. ` ... ` C. `C_(4)H_(12)` D. All of these
Description : Molecular formula of smallest ester which contain one chiral carbon is :
Last Answer : Molecular formula of smallest ester which contain one chiral carbon is : A. `C_(4)H_(8)O_(2)` B. `C_(5)H_(12)O ... )H_(12)O_(2)` D. `C_(5)H_(10)O_(2)`
Description : Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to------? A. hydrogen bonding B. irregular shape of the molecules C. irregular shape of the molecules and strong inter-molecular forces (Answer) D. greater molecular size
Last Answer : C. irregular shape of the molecules and strong inter-molecular forces (Answer)
Description : The role of molecular chaperones is to A-facilitate binding of ribosomes to mRNA B-degrade newly synthesized polypeptides that contain inaccurate sequences C-.facilitate binding of RNA polymerase to DNA D-aid a newly synthesized polypeptide in folding to its proper shape
Last Answer : -aid a newly synthesized polypeptide in folding to its proper shape
Last Answer : aid a newly synthesized polypeptide in folding to its proper shape
Description : Compare the following complexes with respect to their shape, magnetic behaviour and the hybrid orbitals involved : (i) [CoF4]2- (ii) [Cr(H2O)2(C2O4)2]– (iii) [Ni(CO)4] (Atomic number : Co = 27, Cr = 24, Ni = 28) -Chemistry
Last Answer : (i) [COF4]2_ : Tetrafluorido cobalt (III) ion Coordination number = 4 Shape = Tetrahedral Hybridisation = sp3 Important Questions for Class 12 Chemistry Chapter 9 Coordination Compounds Class 12 Important Questions 7
Description : For the complex [Fe(en)2Cl2], Cl, (en = ethylene diamine), identify (i) the oxidation number of iron, (ii) the hybrid orbitals and the shape of the complex, (iii) the magnetic behaviour of the complex, (iv) ... an optical isomer also, and (vi) name of the complex. (At. no. of Fe = 26) \ -Chemistry
Last Answer : i) [Fe(en)2Cl2] Cl or x + 0 + 2 (-1) + (-1) = 0 x + (- 3) = 0 or x = + 3 ∴ Oxidation number of iron, x = + 3 (ii) The complex has two bidentate ligands and two ... )2Cl2] Cl, only cis-isomer shows optical isomerism. (vi) Name of complex: Dichloridobis (ethane-1, 2- diamine) Iron (III) chloride
Description : For principle quantum number `n = 4`, the total number of orbitals having `l =3` is
Last Answer : For principle quantum number `n = 4`, the total number of orbitals having `l =3` is A. 3 B. 7 C. 5 D. 9
Description : The subshell that arises after f subshell is called g subshell. ltBrgt What is the total number of orbitals in the shell in which the g- subshell firs
Last Answer : The subshell that arises after f subshell is called g subshell. ltBrgt What is the total number of orbitals in the shell ... ? A. 9 B. 16 C. 25 D. 36
Description : What Number of orbitals in argon?
Description : What does not contain free electrons ?
Last Answer : Absolute does not have any free electrons.
Description : How many energy levels contain electrons in an atom of zirconium (Zr)?
Last Answer : 4
Description : How many electrons does a neutral magnesium atom contain?
Last Answer : What is the answer ?
Description : A neutral atom contains 5 neutrons and 4 protons. How many electrons does it contain?
Last Answer : 4 A+
Description : Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above
Last Answer : Ans:(b)
Description : (1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one ... surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.
Last Answer : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas
Description : Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above
Last Answer : (1) they contain free electrons Explanation: Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.
Description : Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above
Description : Aromatic molecules contain __________ π electrons. (a) no (b) 4n + 2 (with n being an integer) (c) 4n + 2 (with n being 0.5) (d) 4n (with n an integer)
Last Answer : 4n + 2 (with n being an integer)
Description : Metal are good conductors, because (1) they contain free electrons (2) the molecules in them are very close to each other (3) the molecules in them collide very freely (4) they contain reflecting surface
Last Answer : they contain free electrons
Description : Why are P orbitals the shape they are?
Last Answer : It’s been far too long for me to remember the answer off the top of my head. You might want to check http://en.wikipedia.org/wiki/Atomic_orbital#Qualitative_understanding_of_shapes . I hope this helps.
Description : Compare the following complexes’ with respect to structural shapes of units, magnetic behaviour and hybrid orbitals involved in units : (i) [Ni(CN)4]2- (ii) [NiCl4]2- (iii) [CoF6]3- [At. Nos. : Ni = 28; Co = 27] -Chemistry
Last Answer : (i) [Ni(CN)4]2- Shape : Octahedral outer orbital complex Hybridisation : sp3d2 Magnetic behaviour : Paramagnetic (4 unpaired electrons)
Description : Compare the following complexes with respect to structural shapes of units, magnetic behaviour and hybrid orbitals involved in units : [Co(NH3)6]+3, [Cr(NH3)6]3+, Ni(CO)4 (At. nos. : Co = 27, Cr = 24, Ni = 28) -Chemistry
Last Answer : (i) [Co(NH3)6]+3 → Octahedral shape, d2sp3 hybridisation, diamagnetic Formation of [Co(NH2)6]+3 → oxidation state of Co is +3.
Description : In an atom the order of filling up of the orbitals is governed by which principle? -General Knowledge
Last Answer : The answer is 'Aufbau principle'
Last Answer : answer:
Description : How many orbitals are there in p-subshell?
Last Answer : Answer: Three.