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.
| 201. |
The tiny area in the center of atom is concentrated with mass and is known as |
| A. | proton |
| B. | neutron |
| C. | electron |
| D. | nucleus |
| Answer» E. | |
| 202. |
Paschen series lie in |
| A. | UV region |
| B. | visible region |
| C. | infrared region |
| D. | alpha region |
| Answer» D. alpha region | |
| 203. |
D-sub shell have shape which is |
| A. | simple |
| B. | doubtful |
| C. | oblonged |
| D. | complicated |
| Answer» E. | |
| 204. |
To provide low pressure in discharge tube we attach |
| A. | heat |
| B. | pressurizer |
| C. | atomizer |
| D. | vacuum pump |
| Answer» E. | |
| 205. |
By chemical means, chemical elements cannot be broken down into |
| A. | metals |
| B. | non-metals |
| C. | smaller substances |
| D. | metalloids |
| Answer» D. metalloids | |
| 206. |
New elements discovered by Moseley were |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» C. four | |
| 207. |
First element in periodic table to have 8 valence electrons in third shell is |
| A. | silicon |
| B. | chlorine |
| C. | argon |
| D. | potassium |
| Answer» D. potassium | |
| 208. |
Spectral lines of hydrogen atom which comes in IR region forms |
| A. | two series |
| B. | three series |
| C. | four series |
| D. | five series |
| Answer» C. four series | |
| 209. |
To produce X rays anode is made up of |
| A. | heavy metals |
| B. | light metals |
| C. | strong metals |
| D. | very delicate metal |
| Answer» B. light metals | |
| 210. |
Wavelength of orange color is |
| A. | 500nm-600nm |
| B. | 600nm-620nm |
| C. | 300-450nm |
| D. | 200-300nm |
| Answer» C. 300-450nm | |
| 211. |
N+l value of 2p orbital is |
| A. | 4 |
| B. | 3 |
| C. | 6 |
| D. | 5 |
| Answer» C. 6 | |
| 212. |
Slit through which X Rays pass is made up of |
| A. | platinum |
| B. | aluminium |
| C. | steel |
| D. | iron |
| Answer» B. aluminium | |
| 213. |
Fluorescence produced by cathode rays in alumina is |
| A. | red |
| B. | blue |
| C. | green |
| D. | yellow |
| Answer» B. blue | |
| 214. |
N+l value of4f orbital is |
| A. | 3 |
| B. | 9 |
| C. | 8 |
| D. | 7 |
| Answer» E. | |
| 215. |
The removal of 7th electron from an element of Group VI of the periodic table needs three times more energy than |
| A. | 5th electron |
| B. | 6th electron |
| C. | 8th electron |
| D. | 18th electron |
| Answer» C. 8th electron | |
| 216. |
Value of Planck's constant is |
| A. | 9.45*106-34Js |
| B. | 8.24*106-34Js |
| C. | 7*106-34Js |
| D. | 6.26*106-34Js |
| Answer» E. | |
| 217. |
Size of 2s-orbital as compared to 1s-orbital is |
| A. | large |
| B. | small |
| C. | very large |
| D. | medium |
| Answer» B. small | |
| 218. |
Positive rays show positive charge by deflection through |
| A. | magnetic field |
| B. | electric field |
| C. | both electric and magnetic field |
| D. | negative field |
| Answer» D. negative field | |
| 219. |
Positive rays in discharge tube produced glow on wall opposite to |
| A. | anode |
| B. | cathode |
| C. | lateral wall |
| D. | parallel wall |
| Answer» B. cathode | |
| 220. |
Relative charge which is present on proton is |
| A. | −1 |
| B. | 1 |
| C. | 2 |
| D. | −2 |
| Answer» C. 2 | |
| 221. |
Wavelength 550nm-600nm shows |
| A. | red color |
| B. | blue color |
| C. | yellow color |
| D. | orange color |
| Answer» D. orange color | |
| 222. |
S-sub shell have shape of |
| A. | circle |
| B. | spherical |
| C. | square |
| D. | oval |
| Answer» C. square | |
| 223. |
Specific radioactive isotopes are used for |
| A. | leakage check |
| B. | check thyroid activity |
| C. | treat some types of cancer |
| D. | all of above |
| Answer» E. | |
| 224. |
Value of radius 4.75 angstrom is for |
| A. | 2nd orbit of hydrogen |
| B. | 3rd orbit of hydrogen |
| C. | 5th orbit of hydrogen |
| D. | 6th orbit of hydrogen |
| Answer» C. 5th orbit of hydrogen | |
| 225. |
Dependence of angular momentum is on |
| A. | quantum energy |
| B. | quantum number |
| C. | quantum density |
| D. | thickness |
| Answer» C. quantum density | |
| 226. |
Number of degenerate orbitals in p-sub shell are |
| A. | four |
| B. | three |
| C. | two |
| D. | five |
| Answer» C. two | |
| 227. |
Enthalpy change after formation of 1 mole of gaseous atoms from its element is called enthalpy change of |
| A. | atomization |
| B. | gaseous |
| C. | moles |
| D. | electron affinity |
| Answer» B. gaseous | |
| 228. |
If nucleon number of potassium is 39, number of neutrons will be |
| A. | 39 |
| B. | 19 |
| C. | 20 |
| D. | 29 |
| Answer» D. 29 | |
| 229. |
The filling of sub-shells are dependent upon |
| A. | conductivity |
| B. | relative energy |
| C. | density |
| D. | probability |
| Answer» C. density | |
| 230. |
Successive ionization energy helps us in |
| A. | confirming electronic configuration |
| B. | number of protons |
| C. | number of neutrons |
| D. | none of above |
| Answer» B. number of protons | |
| 231. |
Atomic spectrum can be produced by help of high temperature or |
| A. | water pressure |
| B. | electric discharge |
| C. | light |
| D. | sound energy |
| Answer» C. light | |
| 232. |
Wavelength of 400-430nm is for |
| A. | yellow color |
| B. | violet color |
| C. | blue color |
| D. | purple color |
| Answer» C. blue color | |
| 233. |
Value of radius in angstrom for fifth orbit of hydrogen is |
| A. | 0.529angstrom |
| B. | 2.11 angstrom |
| C. | 8.4angstrom |
| D. | 13.22 angstrom |
| Answer» E. | |
| 234. |
Flashes are produced by positive rays on |
| A. | ZnS plate |
| B. | Sulphur plate |
| C. | diamond plate |
| D. | gold plate |
| Answer» B. Sulphur plate | |
| 235. |
Thickness of gold foil is |
| A. | 0.00004cm |
| B. | 0.00007cm |
| C. | 0.09cm |
| D. | 0.008cm |
| Answer» B. 0.00007cm | |
| 236. |
If proton number is 19, electron configuration will be |
| A. | 2,8,7 |
| B. | 2,8,18 |
| C. | 2,8,8,1 |
| D. | 2,8,8,3 |
| Answer» D. 2,8,8,3 | |
| 237. |
For metal under consideration in X Rays, constants are |
| A. | b and c |
| B. | a and b |
| C. | c and d |
| D. | d and e |
| Answer» C. c and d | |
| 238. |
Elements with 1-3 valence electrons are called |
| A. | metals |
| B. | non-metals |
| C. | inert gases |
| D. | amphoteric oxides |
| Answer» B. non-metals | |
| 239. |
Level of energy of all three p-orbitals in absence of magnetic field is |
| A. | less |
| B. | more |
| C. | same |
| D. | higher to lower |
| Answer» D. higher to lower | |
| 240. |
Near nucleus potential energy of electron is usually less than |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 241. |
Value of energy for first orbit of hydrogen in kilo joule per mole is |
| A. | −145 |
| B. | −1313.31 |
| C. | 1313.31 |
| D. | 145.92 |
| Answer» C. 1313.31 | |
| 242. |
Diffraction is a property of |
| A. | waves |
| B. | particles |
| C. | solids |
| D. | gases |
| Answer» B. particles | |
| 243. |
Balmer series has limiting line in |
| A. | UV region |
| B. | infrared region |
| C. | visible region |
| D. | radio waves region |
| Answer» B. infrared region | |
| 244. |
Total number of electrons in p-sub shell are |
| A. | 6 |
| B. | 4 |
| C. | 10 |
| D. | 2 |
| Answer» B. 4 | |
| 245. |
Rutherford proposed about neutron that its mass should be equal to |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | anti neutrino |
| Answer» C. neutron | |
| 246. |
Quantum theory was explained to show behavior of |
| A. | energy |
| B. | radiation |
| C. | density |
| D. | volume |
| Answer» C. density | |
| 247. |
Number of electrons in calcium are 20. outermost shall will have as many as |
| A. | no electrons |
| B. | 1 electron |
| C. | 2 electrons |
| D. | more than 2 electrons |
| Answer» D. more than 2 electrons | |
| 248. |
Value of principle quantum number is always |
| A. | zero |
| B. | negative integers |
| C. | positive integers |
| D. | both b and c |
| Answer» D. both b and c | |
| 249. |
In absence of magnetic field, all three p-orbitals are called |
| A. | degenerate orbitals |
| B. | s-orbitals |
| C. | generate orbital |
| D. | both a and b |
| Answer» B. s-orbitals | |
| 250. |
Line spectrum is actually characteristic of |
| A. | liquids |
| B. | gases |
| C. | atom |
| D. | plasma |
| Answer» D. plasma | |