MCQOPTIONS
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MCQOPTIONS
This section includes 551 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Visible spectrum has |
| A. | six colors |
| B. | five colors |
| C. | seven colors |
| D. | nine colors |
| Answer» D. nine colors | |
| 452. |
Series which is further divided into smaller lines is |
| A. | Balmer series |
| B. | Pfund series |
| C. | Brackett series |
| D. | Lyman series |
| Answer» B. Pfund series | |
| 453. |
Energy of electron is zero |
| A. | near nucleus |
| B. | at infinity |
| C. | in first orbit |
| D. | in last orbit |
| Answer» C. in first orbit | |
| 454. |
N+l value of 6p orbital is |
| A. | 5 |
| B. | 3 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 455. |
In Rutherford atomic model alpha particles were stroked on |
| A. | aluminum |
| B. | gold |
| C. | silver |
| D. | titanium |
| Answer» C. silver | |
| 456. |
Atomic model is |
| A. | flat |
| B. | not flat |
| C. | in one plane |
| D. | in one dimension |
| Answer» C. in one plane | |
| 457. |
Existence of neutron was predicted by Rutherford in year |
| A. | 1920 |
| B. | 1980 |
| C. | 1900 |
| D. | 1970 |
| Answer» B. 1980 | |
| 458. |
Moseley law helped us to discover |
| A. | Pr |
| B. | Tc |
| C. | potassium |
| D. | sodium |
| Answer» C. potassium | |
| 459. |
Maximum number of electrons that can be accommodated in a shell is given by |
| A. | 2n2 |
| B. | 2n3 |
| C. | 2n |
| D. | none |
| Answer» B. 2n3 | |
| 460. |
Another name for positive rays is |
| A. | cathode rays |
| B. | anode rays |
| C. | canal rays |
| D. | neutral rays |
| Answer» D. neutral rays | |
| 461. |
Moseley performed his studies on X Rays in |
| A. | 1980-1986 |
| B. | 1913-1915 |
| C. | 1920-1980 |
| D. | 1987-1989 |
| Answer» C. 1920-1980 | |
| 462. |
Second orbit of hydrogen is far from first orbit at about |
| A. | two times |
| B. | six times |
| C. | four times |
| D. | nine times |
| Answer» D. nine times | |
| 463. |
Thomson from his experiment on cathode rays concluded that every atom contains |
| A. | protons |
| B. | neutrons |
| C. | electrons |
| D. | anti neutrino |
| Answer» D. anti neutrino | |
| 464. |
By e/m ratio of cathode rays, we deduce they are |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | anti neutron |
| Answer» C. neutrons | |
| 465. |
Ionization energy is represented by a symbol ΔH1 whose units are |
| A. | kJmol⁻¹ |
| B. | kJmol⁻¹⁰ |
| C. | kJmol⁻¹¹ |
| D. | kJmol⁻² |
| Answer» B. kJmol⁻¹⁰ | |
| 466. |
Hydrogen has a number of isotopes |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 11 |
| Answer» D. 11 | |
| 467. |
Neutrons (n⁰) are neutral and carry |
| A. | positive charge |
| B. | negative charge |
| C. | no charge |
| D. | high voltage |
| Answer» D. high voltage | |
| 468. |
The number of proton, neutron and electron in sulfide ion is respectively |
| A. | 16,17 and 18 |
| B. | 17,16 and 18 |
| C. | 18,17 and 16 |
| D. | 18,16 and 17 |
| Answer» B. 17,16 and 18 | |
| 469. |
In periodic table, period number indicates number of |
| A. | neutrons |
| B. | protons |
| C. | electrons |
| D. | photons |
| Answer» E. | |
| 470. |
Mass of a proton is equal to that of mass of |
| A. | a neutron |
| B. | an electron |
| C. | a proton |
| D. | a positron |
| Answer» B. an electron | |
| 471. |
Value of azimuthal quantum number always start from |
| A. | two |
| B. | one |
| C. | zero |
| D. | one |
| Answer» D. one | |
| 472. |
Tube to discover electrons is fitted with |
| A. | vapors |
| B. | liquids |
| C. | solids |
| D. | none of these |
| Answer» B. liquids | |
| 473. |
Dual characteristic of metals was described by |
| A. | Max Planck |
| B. | Stoney |
| C. | Moseley |
| D. | Louis DE Broglie |
| Answer» E. | |
| 474. |
Rutherford model was unsatisfactory because it could not explain movement of |
| A. | electrons |
| B. | protons |
| C. | neutrons |
| D. | positrons |
| Answer» B. protons | |
| 475. |
To describe metal characteristics in X Rays equation given was |
| A. | Rutherford equation |
| B. | Moseley equation |
| C. | Bohr equation |
| D. | none of these |
| Answer» C. Bohr equation | |
| 476. |
Ha line is further divided into |
| A. | four lines |
| B. | three lines |
| C. | five lines |
| D. | two lines |
| Answer» D. two lines | |
| 477. |
Cathode rays when strike anode particles produce |
| A. | gamma rays |
| B. | X rays |
| C. | beta rays |
| D. | alpha rays |
| Answer» C. beta rays | |
| 478. |
In derivation of de Broglie equation wavelength depends upon |
| A. | momentum |
| B. | mass |
| C. | velocity |
| D. | length |
| Answer» B. mass | |
| 479. |
Extra stability is gained in third shell if number of electrons are |
| A. | 18 |
| B. | 2 |
| C. | 8 |
| D. | 10 |
| Answer» D. 10 | |
| 480. |
Spectrum of light in addition to visible light has |
| A. | six regions |
| B. | five regions |
| C. | seven regions |
| D. | eight regions |
| Answer» D. eight regions | |
| 481. |
Energy change according to Bohr is given by |
| A. | quantum energy |
| B. | Planck's equation |
| C. | Rutherford equation |
| D. | Bohr's equation |
| Answer» C. Rutherford equation | |
| 482. |
Elements with more than 57 electrons require |
| A. | f-orbital |
| B. | d-orbital |
| C. | p-orbital |
| D. | s-orbital |
| Answer» B. d-orbital | |
| 483. |
Configuration of 18 electrons (e⁻) in third principal quantum level in s=2, p=8 and d will be |
| A. | 18 |
| B. | 10 |
| C. | 12 |
| D. | 11 |
| Answer» C. 12 | |
| 484. |
Electrons should be filled in energy sub shells in order of increasing energy values, is principle of |
| A. | Aufbau |
| B. | Pauli's exclusion |
| C. | Hund's |
| D. | none of these |
| Answer» B. Pauli's exclusion | |
| 485. |
Mass of one electron in amu |
| A. | 1.0073 |
| B. | 1.0087 |
| C. | 5.4858810^-4 |
| D. | 5.58810^-4 |
| Answer» D. 5.58810^-4 | |
| 486. |
Unit of frequency of waves is |
| A. | per atom |
| B. | per molecule |
| C. | per second |
| D. | per cycles |
| Answer» D. per cycles | |
| 487. |
Value of electron permittivity in Columb square per Joule per meter is |
| A. | 6*10^-12 |
| B. | 9.34*10^-12 |
| C. | 8.84*10^-12 |
| D. | 5*10^-12 |
| Answer» D. 5*10^-12 | |
| 488. |
The major part of an atom is |
| A. | electric field |
| B. | space |
| C. | nucleus |
| D. | orbital |
| Answer» C. nucleus | |
| 489. |
Elements were properly arranged in Mendeleev periodic table by |
| A. | Rutherford |
| B. | Bohr |
| C. | Moseley |
| D. | Einstein |
| Answer» D. Einstein | |
| 490. |
Path of rays of cathode in which they travel is |
| A. | curved |
| B. | circular |
| C. | straight |
| D. | oblique |
| Answer» D. oblique | |
| 491. |
Number of lobes in fifth d-orbital are |
| A. | four |
| B. | eight |
| C. | two |
| D. | three |
| Answer» D. three | |
| 492. |
Principle quantum number is represented by |
| A. | n |
| B. | m |
| C. | l |
| D. | p |
| Answer» B. m | |
| 493. |
Motion which is responsible for doublet line structure in spectrum is |
| A. | spin motion |
| B. | rotational motion |
| C. | linear motion |
| D. | vibratory motion |
| Answer» B. rotational motion | |
| 494. |
Bohr applied Planck's postulates on |
| A. | nitrogen atom |
| B. | carbon atom |
| C. | Sulphur atom |
| D. | hydrogen atom |
| Answer» E. | |
| 495. |
Probability of finding electron in hydrogen atom is at |
| A. | 0.56nm |
| B. | 0.053nm |
| C. | 0.09nm |
| D. | 0.098nm |
| Answer» C. 0.09nm | |
| 496. |
The second principal quantum shell can accommodate the number of electrons in numbers |
| A. | 2 |
| B. | 8 |
| C. | 18 |
| D. | 32 |
| Answer» D. 32 | |
| 497. |
Velocity of electron can be easily determined if it is present in |
| A. | orbit |
| B. | space |
| C. | between orbits |
| D. | nucleus |
| Answer» B. space | |
| 498. |
Energy levels of electrons are also called as |
| A. | shells |
| B. | orbits |
| C. | gases |
| D. | Photons |
| Answer» B. orbits | |
| 499. |
Isotopes of same element have |
| A. | different number of neutrons |
| B. | different masses |
| C. | same protons and neutrons |
| D. | all of these |
| Answer» E. | |
| 500. |
Spectral lines has wavelength and wave number which depends upon |
| A. | Quantity of energy emitted by electron |
| B. | quantity of electrons |
| C. | quantity of light |
| D. | quantity of atoms |
| Answer» B. quantity of electrons | |