Class Xi MCQ Test
30 Questions
| Total Attempts: 45
TIME ALLOTTED: 60 MINUTES NEGATIVE MARKING OF -1 MARKS FOR INCORRECT ANSWERS
Questions and Answers
- 1.Which orbital diagram does not obey Aufbau Principle?
- A.
A
- B.
B
- C.
C
- D.
D
- 2.The basis of three unpaired electrons present in the configuration of Nitrogen is
- A.
Aufbau's principle
- B.
Pauli's principle
- C.
Hund's principle
- D.
Uncertainty principle
- 3.An electron has kinetic energy 2.8×10-23 J De-broglie wavelength will be nearly?
- A.
9.8×10-24
- B.
9.8×10-7
- C.
9.8×10-8
- D.
9.8×10-10
- 4.The quantum numbers +1/2 and -1/2 for the electron spin represent?
- A.
Rotation of electron in clockwise and anticlockwise direction respectively.
- B.
Rotation of electron in anticlockwise and clockwise direction respectively.
- C.
Magnetic moment of the electron pointing up and down respectively
- D.
Two quantum mechanical spin states which have no classical analogue.
- 5.The number of electrons that can be accommodated in dz2 orbital is?
- A.
10
- B.
4
- C.
1
- D.
2
- 6.Uncertainty in position of a 0.25 g particle is 10-5 m. Then uncertainty in its velocity will be? (h=6.6×10-34 Js)
- A.
1.2×1034
- B.
2.1×10-26
- C.
1.6×10-20
- D.
1.7×10-9
- 7.Which of the following is correctly matched
- A.
Isotopes 20Ca40 19K40
- B.
Isotones Si30 P31 S32
- C.
Isobars O16 O17 O18
- D.
Isoelectronic N-3 O-2 CrCr+3
- 8.Angular momentum for P-shell electron-
- A.
3h/π
- B.
Zero
- C.
√2h/2π
- D.
None
- 9.In an electronic transition atom cannot emit
- A.
Visible light
- B.
Gamma rays
- C.
Infra red light
- D.
UV light
- 10.Heisenberg Uncertainty principle is not valid for
- A.
Moving electron
- B.
Motor car
- C.
Stationary particles
- D.
2 & 3 both
- 11.In an atom, for how many electrons, the quantum numbers will be, n=3, l=2 , m= +2 , s= +1/2
- A.
18
- B.
6
- C.
24
- D.
1
- 12.
![Electronic configuration given below has violated - ProProfs]( "Electronic configuration given below has violated")
Electronic configuration given below has violated- A.
Hund's rule
- B.
Paul's principle
- C.
Aufbau's principle
- D.
N+l rule
- 13.The atomic number of the element having maximum number of unpaired 3p electrons is (in ground state)
- A.
15
- B.
10
- C.
12
- D.
8
- 14.Assertion- No teo electrons in an atom can have the same values of four quantum numbers. Reason- No two electrons in an atom can be simultaneously in the same shell, same Subshell, same orbitals and have same spin. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 15.Assertion- p- orbital has dumb bell shape. Reason- Electrons present in p-orbital can have three values for 'm' - 0, +1 , -1 Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 16.Assertion- The ground state configuration of Cr is 3d5 4s1 Reason- A set of exactly half filled orbitals containing parallel spin arrangement provide extra stability. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 17.Assertion- An orbital cannot have more than two electrons Reason- The two electrons with opposite spin in an orbital create opposite magnetic field. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 18.Assertion- The configuration of B atom cannotbe 1s2 2s3 Reason- Hund's rule demands that the configuration should display maximum multiplicity. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 19.Assertion- In Rutherford's gold foil experiment, a very few alpha particles are deflected back. Assertion- Nucleus present inside the atom is heavy. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 20.The wavelength of spectral lines emitted is inversely proportional to?
- A.
Velocity
- B.
Energy
- C.
Quantum number
- D.
Radius
- 21.Assertion- Bohr model fails in case of multielectron species. Reason- It does not mention electron-electron interaction. Choose the answers appropriately. A: If both Assertion and Reason are True and Reason is the correct explanation of Assertion. B : If both Assertion and Reason are True but Reason is the wrong explanation of Assertion. C : If Assertion is True but Reason is False. D : If both Assertion and Reason are False.
- A.
A
- B.
B
- C.
C
- D.
D
- 22.The wave number which corresponds to electromagnetic radiation of wavelength 500 nm is equal to
- A.
5×10-11 cm-1
- B.
2×104 cm-1
- C.
5×10-5 cm-1
- D.
2×10-9 sec-1
- 23.The De-broglie wavelength of an electron is 66 nm. The velocity of the electron is (h=6.6 × 10-34 kg m2 s-1 m=9.0 × 10-31 kg)
- A.
1.84 × 10-14 m s-1
- B.
1.1 × 104 m s-1
- C.
5.4 × 103 m s-1
- D.
1.1 × 103 m s-1
- 24.If the Planck's constant h= 6.6 × 10-34 Js , de Broglie wavelength of a particle having momentum of 3.3× 10-24 kg m s-1 will be
- A.
0.02 A°
- B.
0.5 A°
- C.
2 A°
- D.
500 A°
- 25.The wavelength associated with a ball of mass 100g moving with a speed of 103 cm/sec (h= 6.6 × 10-34 J/s) is:-
- A.
6.6 × 1032 cm
- B.
6.6 × 1027 cm
- C.
6.6 × 10-27 cm
- D.
6.6 × 10-32 cm
Question No: 1-5 (Physics)
Question No: 6-10 (Chemistry)
Question No: 11-15 (Mathematics)
Question No: 15-20 (Biology)
Questions: 20 | Attempts: 104 | Last updated: Jan 23, 2014
-
Sample QuestionAn inductive coil has a resistance of 100Ω.when an A.C. signal of frequency 1000Hz is fed to the coil, the applied voltage leads the current by 45°. What is the approximate inductance of the coil
Evaluasi Pertama, Berisi 15 soal pilihan ganda. tentang Suggestion, Offering, & Giving Opinion. Waktu di berikan 15 menit untuk 15 Soal.
Questions: 15 | Attempts: 139 | Last updated: Aug 26, 2015
-
Sample QuestionDimas :what about we eating at a new place?Bonar : ....Dimas :Ok, Lets go!
Class C Practice Test 3
Questions: 9 | Attempts: 7483 | Last updated: Aug 14, 2017
-
Sample QuestionA pedestrian is crossing your lane but there is no crosswalk. You should:
Back to top