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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 2151. |
Explain the concepts related to sub shells and orbitals |
| Answer» Orbitals are three dimensional plane around the nucleus where probability of finding electron is maximum<br>Sub shell combine to form shells for eg. 1st shell is made of one subsell i.e. 1s Orbital mean the 3D shape around a nucleus where ptobability of electron is maximum | |
| 2152. |
Calculate the number of moles in 1g nitrogen |
| Answer» 0.00007 | |
| 2153. |
What happen when charges of moving particle double. |
| Answer» Then its momentum is doubled | |
| 2154. |
When spices donate H+ proton and accepts proton in same relation as known as auto protation |
| Answer» | |
| 2155. |
Unit test 1 question paper 2019 |
| Answer» | |
| 2156. |
Density of three molar solution of NaCl is 1.25g/ml. Calculate the molality of the solution |
| Answer» | |
| 2157. |
Write lewis dot structure |
| Answer» Kiska | |
| 2158. |
What is the molarity of water at normal density? |
| Answer» hi sakhya<br>But water has fixed molarity at normal density<br>The molarity of water depends on the temperature. We know, Water density is = 1 gram/mL. So, our liter has 1,000 grams of mass. Grams have a relationship with moles, via the molar mass of a molecule.<br>Please answer friends | |
| 2159. |
Where is the numericals in this app |
| Answer» It may be found in CBSE imp.questions | |
| 2160. |
What is the energy in electron volt required to excit n=1 to n=2 in hydrogen atom??? |
| Answer» | |
| 2161. |
Diff. Btw. Photoelectric effect & black body radiation |
| Answer» | |
| 2162. |
hp board exam me aane vale questions |
| Answer» | |
| 2163. |
Calculate the molarity of pure water if the density of the water is 1gm/cm3 |
| Answer» | |
| 2164. |
what is avg atomic mass |
| Answer» The average atomic mass of an element is the sum of the masses of its isotopes | |
| 2165. |
What would be the value of vant hoff factor for dilute solution of H2SO4 in water |
| Answer» | |
| 2166. |
Are cengage books for pcm good |
| Answer» No | |
| 2167. |
What is significant of the square of wave function. |
| Answer» It shows probability factor of electrons. | |
| 2168. |
Internal energy |
| Answer» | |
| 2169. |
Which reference book is best for chemistry? |
| Answer» Arihant is also good or pradeep<br>PRADEEP CHEMISTRY.<br>Modern abc<br>Cengage<br>Pradeep | |
| 2170. |
What is the formula of sodium aluminio silicate |
| Answer» | |
| 2171. |
Pl balance I2+HNO3=HIO3+NO2+H2O |
| Answer» | |
| 2172. |
why lithium carbonate is not stable to heat |
| Answer» | |
| 2173. |
Explain maxwells theory of waves |
| Answer» | |
| 2174. |
What is the cause of rotation of electrons on it\'s axis? |
| Answer» Centripital force<br>As far as i know electrons don\'t in its own axis they rotate in their orbits1st orbit can hve 2 electron , 2nd can hve 8 its coz of electronic configurationElectrons have negative charge their charge let them rotate<br>i think the attractive force between protons and electrons | |
| 2175. |
When novel gas is inert then why we fill it in bulbs? |
| Answer» Argon | |
| 2176. |
Arange the element N P O S the order of increasing ionization enthalapy |
| Answer» N has higher ionisation enthalpy than O due to extra stability of half-filled orbitals...., P has higher ionisation enthalpy than S due to half-filled orbitals..... so arrangement of these elements will be.... - - - > S < P < O < N | |
| 2177. |
Latest syllabus for 2018-19 session (chemistry) |
| Answer» Latest syllabus is also given in this app. | |
| 2178. |
Atomic and molecular massesCaco3 |
| Answer» Molecular mass = 40 + 12 + 16×3 = 100g | |
| 2179. |
the molality of the solution containing 20%w/w solution of NaOH is? |
| Answer» 6.25 m | |
| 2180. |
What is use of telescope in milikans experiment? |
| Answer» to observe a oil droplets and also for determining a charge of electron . | |
| 2181. |
The volume of water to be added to 100ml of H2SO4 acid solution to get deci normal concentration is |
| Answer» | |
| 2182. |
what is the characteristics of anode ray? |
| Answer» It has mass and kinetic energy<br>it deflects towards negative terminal when it kept in a electrical and magnetic field<br>It is positive in nature | |
| 2183. |
Calculate the number of particles in 179.2 L o2 gas |
| Answer» 1.6176*10^24 particles | |
| 2184. |
1.12 litre of a gas at stp weights 3.2g. what is its vapour density |
| Answer» | |
| 2185. |
What is the relation ship between vapour density and molar mass |
| Answer» molar mass = ~2 × vapour density | |
| 2186. |
Define stoichiometry |
| Answer» Atom cannot be created nor destroyed in this nature it is conserved<br>Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change (chemical reaction). | |
| 2187. |
Give the SI unit of the following:MoralityMolalityMole fraction |
| Answer» The SI unit of molarity = moles/litre and denoted by capital (M) The SI unit of molality = moles/kg and denoted by small (m) | |
| 2188. |
How to manage time when doing school and coaching both? |
| Answer» This depends on you.?<br>Try to do v.v imp H.W only.And always read chapter in advance from coaching<br>Made sure ur home work get completed as soon u can done.U should sleep less as possible | |
| 2189. |
Is Rutherford model removed from second chap of chemistry? |
| Answer» no,but it is removed from our syllabus<br>NN<br>No<br>No | |
| 2190. |
What is an orbital |
| Answer» 90%to95%<br>The region around the nucleus where there is maximum probability of finding electons<br>The probability of finding the electrons is maximum or about 90%<br>Orbital are the 3d space around the nucleus where there is probabilty of finding electron is m aximum | |
| 2191. |
50 ml alcohol and 50 ml water mix with each other than which is solvent and which is solute |
| Answer» Water solvent and alcohole solute | |
| 2192. |
Energy of atomisation define |
| Answer» | |
| 2193. |
What is subatomic particle |
| Answer» Sub atomic particles are such as proton neutron electron which is present in the atom | |
| 2194. |
If the cation is positive so parental atom is cation yes or no? Explain? |
| Answer» | |
| 2195. |
How many spherical nodes present in 3p orbital ? |
| Answer» 1<br>Give reason<br>1 | |
| 2196. |
I am confused that cation is negative or positive and anion is negative or positive |
| Answer» Cation are positive and anion are negative.U can rember this from a simple logic...cation means add that is cut from cution u can learn add...may this help u<br>Cations are positive in charge and anions are negative in charge<br>cation is positive and anion is negative. | |
| 2197. |
Kisi k pas 1st chptr k notes h |
| Answer» Chemistry<br>which subject<br>Yes | |
| 2198. |
Chemistry me kaise tyari kare |
| Answer» Not try to learn anything just try to understand this | |
| 2199. |
What is GMM?? |
| Answer» Gram molecular mass | |
| 2200. |
Find total no. of h2 atoms in 100 ml of methanol CH3OH. Density of methanol is 0.8 gm per ml. |
| Answer» Density = 0.8g , volume =100ml , m=dv =0.8*100=80g/ml ,m=80 and molecular mass ch3oh = 12+3+16+1=32, mole = given mass /molecular mass 80/32=2.5 ,1 mole contain Na atom then 2.5 mole contain 2.5*Na | |