Saved Bookmarks
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your 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 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 But water has fixed molarity at normal density 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. 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 PRADEEP CHEMISTRY. Modern abc Cengage 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 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 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 it deflects towards negative terminal when it kept in a electrical and magnetic field 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 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.? Try to do v.v imp H.W only.And always read chapter in advance from coaching 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 NN No No |
|
| 2190. |
What is an orbital |
|
Answer» 90%to95% The region around the nucleus where there is maximum probability of finding electons The probability of finding the electrons is maximum or about 90% 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 Give reason 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 Cations are positive in charge and anions are negative in charge cation is positive and anion is negative. |
|
| 2197. |
Kisi k pas 1st chptr k notes h |
|
Answer» Chemistry which subject 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 | |