InterviewSolution
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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.
| 151. |
What is work function ...given in chapter 2 |
| Answer» Work function gives the amplitude of the wave associated with the electron . | |
| 152. |
How many atoms are present in 1ml of NH3 at STP |
| Answer» Since 22.7litre nh3 contains 1 mole atom then 1ml=6.022*10to the power 23 divided 22700 which is equal to 2.653into 10 to the power 22<br>4 atoms | |
| 153. |
Calculate amount of iron required to react with 18gm air to form ferro_ferric oxide |
| Answer» | |
| 154. |
mole cncept |
| Answer» Mole is the fundamental unit used to express amount of substance. Mole is a number which count 6.02×10 power 23 of anything. | |
| 155. |
What is electronic confrigution |
| Answer» The distribution of electrons into orbitals of an atom is called its electronic configuration | |
| 156. |
What is the total no. Of orbitals associated with the principal quantum number n=3 |
| Answer» Total no. of orbitals are 9 . | |
| 157. |
If temperature increases then what about the volume |
| Answer» Volume will decrese. | |
| 158. |
CH3-C\'OH H-COOH |
| Answer» | |
| 159. |
Preparation of borax |
| Answer» | |
| 160. |
Name of CH3-CH2-CH2-CH2-SH |
| Answer» | |
| 161. |
Why is the atomic radius of neon much larger than flourine Expalin?? |
| Answer» Because neon is novel element but fluorine is not that\'s why atomic radius of neon is larger than fluorine | |
| 162. |
Transition elements??? |
| Answer» Except zn ,hg,w, which is d block element but not transition element<br>D block (transition element) elements which provode link bw s block n p block element | |
| 163. |
Can plz anyone tell me the ans of 31 st question of exercise of chapter 2? Plzzzzz??? |
| Answer» The electronic configuration is wrong.....check it out Unnati.....plz<br>A) Total no. of electron in an atom for a value of n=2n^2For n= 4Total number of electron=2(4)^2The given element has a fully filled orbital as 1s^2 2s^2 2p^ 6 3s^2 3p^6 4s^2 3d^10Hence all the electron are pairedNumber of electron (having n= 4 nd m ↓s =-1/2) =16B) n= 3, l =0 indicate that the electron are present in the 3S orbitalTherefore the number of electron having an equal to 3 and l equal to zero is 2<br>Unknown<br>I think it\'s wrong in this app | |
| 164. |
Which orbit of be+³ has almost the same radius as that of the ground state H–atom |
| Answer» 4 th orbit | |
| 165. |
What is meant by concerned nucleus. |
| Answer» | |
| 166. |
what do u mean by chemical equilibrium |
| Answer» when the reaction reaches to a point where the concentration of reactants and products are unchanged with time because the forward and backward reactions are in same rate this phenomena is known as chemical equilibrium | |
| 167. |
Molar mass kasa find out kara |
| Answer» Like C6 h12 o6 so so first we have to take the atomic mass of carbon hydrogen and oxygen week we know that carbon atomic mass is 12 and hydrogen atomic mass is 1 and oxygen atomic mass is 16. Then we will multiply the atomic mass of carbon with it power 6 then we will multiply the the atomic mass of hydrogen with IT power 12 and then we will multiply the atomic mass of oxygen with IT power 6 answer is= 12 x 6 + 1 x 12 + 16 x 6 = 72 +12 +96= 180 so molar mass of C6 h12 o6 is 180 | |
| 168. |
Write the resonance structures for so3 |
| Answer» Molar kasa find out karta ha | |
| 169. |
Why in auf bau Principle 4s filled first before 3d ? |
| Answer» Because of the n+l rule in this we have to check that which orbit have a greater n+l value where n is the principal quantum no..and l is the azimuthal quantum no....and it value is ...s=0,p=1,d=2,f=3.so 4+0=4 and 3+2=5 ....hence 3d>4s<br>Because of the n+l rule where n=the orbit and l=azimuthal quantum no....So. In 4s, n=4 and l=s suborbit =0.:. Using n+l rule, 4+0=4Now in 3d, n=3 and l=d suborbit =2.:. Using n+l rule, 3+2 =5So, point to be noted is 1)s=0, p=1,d=2,and f=32)The the subshell with less energy will be filled first. Since, 4s has less energy i.e. 4,than 3d,i.e. 5, 4s is filled before 3d..... | |
| 170. |
Which book will study to score good marks for chemistry |
| Answer» Not avc,its abc<br>Modern\'s avc | |
| 171. |
What is mass of electron in gram and kg |
| Answer» In kg ,mass of electron=9.10939×10‐³¹kgIn gram,mass of electron =9.10939×10-²⁸g | |
| 172. |
List out Bohr`s model of hydrogen atom |
| Answer» Neils Bohr proposed a model of atom in 1912 to remove the drawbacks of Rutherford’s atomic model and to explain the structure of an atom in detail. The features of Bohr’s model of atom are given below:-i) An electron revolves in the orbit of atom with well-defined energy.ii) Energy of orbits increases from the inner shell to the outer shells i.e. energy of orbit nearest to the nucleus is the lowest.iii) If energy is supplied to an electron, it\xa0moves from a lower orbit to a higher orbit. When\xa0an electron moves from a higher orbit (energy level) to a lower orbit (energy level),\xa0energy is radiated as electromagnetic waves.iv) Each orbit or shell represents an energy level. Such orbits are represented as K,L,M,N,O\xa0(named starting from the centre of an atom).v) The shell or orbits are associated with a certain amount of energy and energy of orbits/shells increases from the nucleus\xa0towards the valence shell. | |
| 173. |
Definition of shells |
| Answer» An electron shell, or a principal energy level, may be thought of as an orbit followed by electrons around an atom\'s nucleus. | |
| 174. |
About electron valt |
| Answer» Electron volt, unit of energy commonly used in atomic and nucleus physics, equal to the energy gained by an electron (a charged particle carrying unit electronic charged) when the electrial patented of the electron increases by one volt. The electron volt equal 1.602*10ki power -12 erg, or 1.602*10 ki power -19 joule. | |
| 175. |
Notes of ch2 pls send me |
| Answer» Check revision notes here :\xa0https://mycbseguide.com/cbse-revision-notes.html | |
| 176. |
What temperature0°c and F become equal |
| Answer» There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. This is -40 °C and -40 °F.<br>F become equal to 273 | |
| 177. |
Who developed the long form of the periodic table? |
| Answer» Dmitri Mendeleev | |
| 178. |
all laws of chemical combination theory with two examples numerical |
| Answer» Phir se pdh lo?<br>Hame aapke naam mein doubt hai? | |
| 179. |
How many significant figures are present in the following ?1. 0.00252.1260003.500.0 |
| Answer» 1. 2 significant figures...2. 3 significant figures... 3. 4 significant figures are present.... | |
| 180. |
Given the IUPACK names of the following alkenes |
| Answer» Can you plz elaborate<br>?? | |
| 181. |
Given the IUPACK names of the following alkanes |
| Answer» Also mention name of alkanes so i can answer your question please also mention name<br>Dude !! It\'s IUPAC name... Nd where r the following alkanes....? | |
| 182. |
Arrange al3+, al, mg2+, mg in order of their increasing ionic radii. |
| Answer» Mg>Al>Mg+2>Al+3 | |
| 183. |
In general metals have low ionization enthalpy values have greater tendency to form ionic bonds |
| Answer» Yes, your statement is true. It is because, low IE means greater ability to lose electrons, and greater metallic character. | |
| 184. |
30% urea solution (density=1.08 gm/ml). Find•Molarity •Molality •Mole fraction of solution |
| Answer» | |
| 185. |
Calculate amount in grams(A) 2.5gm molecules of N2(B) 5.2gm atom of Na |
| Answer» | |
| 186. |
How many molecules are present in 1kg of H2 |
| Answer» 6.022*10^3 molecules. | |
| 187. |
which are Amphoteric is oxide |
| Answer» Thanks allvof you<br>Amphoteric oxides are those oxides which can react with both acid and base to give salt and water.For ex. Zno and Al2O3<br>ZnO<br>Amphotheric oxides are those oxides which reacts with acid or bas to give salt and water | |
| 188. |
Calculate the number of atoms in 10cm mole of nitrogen. |
| Answer» | |
| 189. |
Difference b/w electron gain enthalpy and electron negativity |
| Answer» Electron gain enthalpy is energy used to gain electron from atom. Electronagativity is loses of electrons from atom. | |
| 190. |
What is volume percentage |
| Answer» | |
| 191. |
What is the bond order? |
| Answer» | |
| 192. |
What is the bond angle? |
| Answer» Angle b/w two bond is known as bond angle | |
| 193. |
What is the bond enthalpy? |
| Answer» Hello sim physical da saraaaaa homework kar leyaaa tu . Ok guud night and sweet dream ???????????????????✋✋✋✋????????? | |
| 194. |
What is the lattice enthalpy? |
| Answer» | |
| 195. |
What is the ionic or electrovalent bond? |
| Answer» The bond formed by the transfer of electrons is called ionic bonds.<br>Electrovalent bond chemical bond formed between ions of opposite charge.<br>Ionic bond The bond is formed b/w the atom when one atom transfer the valance electron to another atom. | |
| 196. |
Write the limitarions of the octet rule? |
| Answer» 1.hydrogen does not form octate it form doublet.2.it does not explain the electron rich compound.(it means atom contain more than 8 electron).ex-PCl5 , SF63.it does not explain electron deficient compund (it mean atom contain less than 8 electron).ex-BCl3,AlCl34.it does not explain the compound of nobel gases.ex-XeF2,XeF45.some molecule contain odd no. Of electron in the formation of bond.Ex-NO,NO2 | |
| 197. |
If h2o is water then what is oh2 ? |
| Answer» Hydroxide<br>Oh2 is a diatomic hydroxide with positive charge | |
| 198. |
Define vsep |
| Answer» Velence shell electrone pair repulsion theory | |
| 199. |
Whicj book is best for chemistry pradeep or modern abc . Reply fasy ???? |
| Answer» Pardeep<br>Modern abc<br>Pradeep<br>Modern ABC<br>Acc to me for chem..modern | |
| 200. |
Why electron have one up quarks and 2 down quarks ? |
| Answer» Neutron contain one up quarks & two down quarks. The nucleus is held together by the "strong nucleus force" which is one of four fundamental forces (gravity & electrmagnetism are two others). The strong force counteracts the tendency of the positively-charged protons to repel each other. | |