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.
| 251. |
Whenever there is no empty orbital is available within sub-shell, electrons are |
| A. | deflected |
| B. | reflected |
| C. | paired |
| D. | charged |
| Answer» D. charged | |
| 252. |
620nm to 800nm is wavelength for |
| A. | red color |
| B. | yellow color |
| C. | blue color |
| D. | black color |
| Answer» B. yellow color | |
| 253. |
The mass number is the |
| A. | atomic number |
| B. | nucleon number |
| C. | proton number |
| D. | neutron number |
| Answer» C. proton number | |
| 254. |
Value of Principle quantum number represents |
| A. | sub shell |
| B. | space |
| C. | shell |
| D. | nucleus |
| Answer» D. nucleus | |
| 255. |
Metals are good conductors due to |
| A. | ionic lattices |
| B. | crystalline lumps |
| C. | mostly solids |
| D. | localized electrons |
| Answer» E. | |
| 256. |
Proton number is represented by |
| A. | A |
| B. | G |
| C. | H |
| D. | Z |
| Answer» E. | |
| 257. |
X105 wave number is for spectral line |
| A. | Hα |
| B. | HΒ |
| C. | Hγ |
| D. | Hω |
| Answer» B. HΒ | |
| 258. |
Letter 'p' for azimuthal quantum number represents |
| A. | principal |
| B. | postal |
| C. | principle |
| D. | particle |
| Answer» B. postal | |
| 259. |
Spectrum of rays having lower wavelength has |
| A. | small energies |
| B. | high energies |
| C. | moderate energies |
| D. | very small energies |
| Answer» C. moderate energies | |
| 260. |
Proton from paraffin can be expelled by |
| A. | neutrons |
| B. | protons |
| C. | electrons |
| D. | nucleus |
| Answer» B. protons | |
| 261. |
The change in energy after removal of one electron from an atom is called |
| A. | enthalpy change |
| B. | ionization energy |
| C. | electric energy |
| D. | bond energy |
| Answer» C. electric energy | |
| 262. |
Element which has 1s22s22p2x2p2y2p2 electronic configuration is |
| A. | Neon |
| B. | Boron |
| C. | Fluorine |
| D. | Carbon |
| Answer» B. Boron | |
| 263. |
Movement of positive rays is from holes in |
| A. | anode |
| B. | neutrons |
| C. | cathode |
| D. | anti neutron |
| Answer» D. anti neutron | |
| 264. |
Electron was name which was given by |
| A. | Thomson |
| B. | Stoney |
| C. | Edward |
| D. | Addison |
| Answer» C. Edward | |
| 265. |
The number of electrons (e⁻) are always equal to number of protons(p⁺) in a |
| A. | neutral atom |
| B. | positive ion |
| C. | negative ion |
| D. | isotope |
| Answer» B. positive ion | |
| 266. |
Name principle quantum number was given by |
| A. | Rutherford |
| B. | Bohr |
| C. | Schrodinger |
| D. | Rydberg |
| Answer» D. Rydberg | |
| 267. |
As the number of proton increases the ionization energy |
| A. | decreases |
| B. | increases |
| C. | remain same |
| D. | fluctuate |
| Answer» C. remain same | |
| 268. |
Planck's constant is represented by |
| A. | d |
| B. | e |
| C. | f |
| D. | h |
| Answer» E. | |
| 269. |
Distance in lines of hydrogen spectrum increases when there is/are |
| A. | decrease in wavelength |
| B. | increase in wavelength |
| C. | same waves |
| D. | no effects |
| Answer» C. same waves | |
| 270. |
A' in Moseley equation is |
| A. | proportionality constant |
| B. | screening constant |
| C. | double constant |
| D. | Rydberg constant |
| Answer» B. screening constant | |
| 271. |
Elements and their isotopes have different |
| A. | number of protons |
| B. | number of electrons |
| C. | chemical properties |
| D. | mass numbers |
| Answer» E. | |
| 272. |
N+l value of 1s orbital is |
| A. | 1 |
| B. | 5 |
| C. | 3 |
| D. | 4 |
| Answer» B. 5 | |
| 273. |
N+l value of 7s orbital is |
| A. | 7 |
| B. | 5 |
| C. | 1 |
| D. | 3 |
| Answer» B. 5 | |
| 274. |
Colors of spectrum merge in |
| A. | line spectrum |
| B. | continuous spectrum |
| C. | hydrogen spectrum |
| D. | nitrogen spectrum |
| Answer» C. hydrogen spectrum | |
| 275. |
N+l value of 5s orbital is |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 276. |
Discovery of neutron was done in year |
| A. | 1970 |
| B. | 1932 |
| C. | 1980 |
| D. | 1990 |
| Answer» C. 1980 | |
| 277. |
Cathode rays can produce shadow when object placed in their path is |
| A. | transparent |
| B. | translucent |
| C. | solid |
| D. | opaque |
| Answer» E. | |
| 278. |
Radius of electron is inversely proportional to |
| A. | velocity |
| B. | square of velocity |
| C. | density |
| D. | square of density |
| Answer» C. density | |
| 279. |
Atom is composed just of electrons and protons, this concept prevailed till |
| A. | 1980 |
| B. | 1932 |
| C. | 1970 |
| D. | 1960 |
| Answer» C. 1970 | |
| 280. |
X105 is wave number for spectral line |
| A. | Hα |
| B. | HΒ |
| C. | Hγ |
| D. | Hω |
| Answer» C. Hγ | |
| 281. |
Upward driving force in oil drop method is given by |
| A. | E |
| B. | mg |
| C. | Ee |
| D. | Ee+mg |
| Answer» D. Ee+mg | |
| 282. |
If number of electrons in chlorine are 17, number of shells required will be |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 283. |
Value of n is 1 for |
| A. | K shell |
| B. | L shell |
| C. | M shell |
| D. | N shell |
| Answer» B. L shell | |
| 284. |
Relative atomic mass for chlorine is |
| A. | 35.7 |
| B. | 35.6 |
| C. | 3.56 |
| D. | 35.5 |
| Answer» E. | |
| 285. |
X Rays are produced in |
| A. | metal tube |
| B. | discharge tube |
| C. | aluminium tube |
| D. | mercury tube |
| Answer» C. aluminium tube | |
| 286. |
Wave number is calculated per unit |
| A. | energy |
| B. | length |
| C. | waves |
| D. | proton |
| Answer» C. waves | |
| 287. |
Covalent solids are |
| A. | good conductors of electricity |
| B. | non-conductors of electricity |
| C. | poor conductors of electricity |
| D. | none of above |
| Answer» C. poor conductors of electricity | |
| 288. |
P-sub shell have shape of a/an |
| A. | dumb-bell |
| B. | pendulum |
| C. | diamond |
| D. | egg |
| Answer» B. pendulum | |
| 289. |
For production of neutrons alpha particles are targeted on |
| A. | beryllium |
| B. | tin |
| C. | tungsten |
| D. | lead |
| Answer» B. tin | |
| 290. |
Range of visible light is from |
| A. | 400-750nm |
| B. | 600-800nm |
| C. | 500-800nm |
| D. | 300-600nm |
| Answer» B. 600-800nm | |
| 291. |
Wave equation on hydrogen atom was given by |
| A. | Dirac |
| B. | Schrodinger |
| C. | Heisenberg |
| D. | Rutherford |
| Answer» C. Heisenberg | |
| 292. |
Neutrons are used to carry out nuclear reactions when they are used as |
| A. | surface molecules |
| B. | projectiles |
| C. | balls |
| D. | surface |
| Answer» C. balls | |
| 293. |
Neutron was emitted by rearrangement of nuclei of beryllium and |
| A. | alpha particles |
| B. | beta particles |
| C. | gamma particles |
| D. | hexa particles |
| Answer» B. beta particles | |
| 294. |
Isotopes have similar |
| A. | chemical properties |
| B. | physical properties |
| C. | number of neutrons |
| D. | mass numbers |
| Answer» B. physical properties | |
| 295. |
Direction of three orbitals of p-sub shell is |
| A. | parallel |
| B. | perpendicular |
| C. | congruent |
| D. | both a and b |
| Answer» C. congruent | |
| 296. |
Number of protons in sodium are 11. number of electrons in outermost shell will be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 8 |
| Answer» B. 2 | |
| 297. |
Neither ions nor electrons are free to move in |
| A. | liquids |
| B. | metals |
| C. | ionic solids |
| D. | gas |
| Answer» D. gas | |
| 298. |
The atomic number is the number of |
| A. | protons (p⁺) |
| B. | electrons (e⁻) |
| C. | neutrons (n⁰) |
| D. | nucleons (p⁺ and n⁰) |
| Answer» B. electrons (e⁻) | |
| 299. |
Louis de Broglie suggested that electrons behaved like |
| A. | clouds |
| B. | winds |
| C. | rains |
| D. | deserts |
| Answer» B. winds | |
| 300. |
Nucleon number of an element is equal to the |
| A. | mass number of an element |
| B. | number of protons and neutrons |
| C. | atomic number |
| D. | both a and b |
| Answer» E. | |