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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.
| 201. |
what are the drawbacks of rutherfords atomic model ? |
| Answer» Rutherford can not explain stability of atom And energy and orientation of atom | |
| 202. |
find mass of o2required to produce 44.8l of co2 |
| Answer» | |
| 203. |
Calculate molality of sulphuric acid solution in which mole fraction of water is 0.85 |
| Answer» If the mole fraction of water is 0.85, the mole fraction of sulfuric acid is 0.15.So, we can express the concentration as{tex}\\frac { 0.15 \\mathrm { mol } \\text { sulfuric acid } } { 0.85 \\text { mol water } }{/tex}Convert moles of water to kilograms of waterMass of water =\xa0{tex}0.85 \\mathrm { mol } \\mathrm { H } _ { 2 } \\mathrm { O } \\times \\frac { 18.02 \\mathrm { g } \\mathrm { H } _ { 2 } \\mathrm { O } } { 1 \\mathrm { mol } \\mathrm { H } _ { 2 } \\mathrm { O } } \\times \\frac { 1 \\mathrm { kg } \\mathrm { H } _ { 2 } \\mathrm { O } } { 1000 \\mathrm { g } \\mathrm { H } _ { 2 } \\mathrm { O } }{/tex}=0.0153 kg H2OCalculate the molal concentration of the waterm =\xa0{tex}\\frac { 0.15 \\mathrm { mol } \\text { sulphuric acid } } { 0.0153 \\mathrm { kg } \\text { water } }{/tex}= 9.8 mol/kg | |
| 204. |
Calculate the molecular mass of the following1.H2so42.h2co3 |
| Answer» 1. H2SO4: 1(2)+32(1)+16(4)=98 98 is the molecular mass of sulphuric acid.2.H2CO3: 1(2)+12(1)+16(3)=6262 is the molecular mass of carbonic acid.Hope it is useful... | |
| 205. |
Write the limitations of the octet rule? |
| Answer» Odd electrons, expanding octet, it could not explain the relative stability of molecules<br>Odd electrons , etc. Bye | |
| 206. |
If we have lewis structure so why do we need resonance structure.... |
| Answer» | |
| 207. |
How many chapter are coming in first periodic test?? |
| Answer» Your school teachers know it better<br>Not more than your school teacher tells??????? | |
| 208. |
Volumetric analysis |
| Answer» | |
| 209. |
The element common to all acids is? |
| Answer» Hydrogen<br>Hydrogen<br>Hydrogen | |
| 210. |
124 amu of p4 wiĺl contain |
| Answer» mass of p4= 120amu120 amu= 6.022×10^23 molecules of p4124 amu= 124×6.022×10^23/120 molecules of p4 | |
| 211. |
Calculate the molarity of 1.26% by weight of HNO3 if specific gravity is 1.4 |
| Answer» | |
| 212. |
What is the atomic mass of crpton |
| Answer» It\'s wrong. Crpton = 36<br>37 | |
| 213. |
Why can\'t we use de - Broglie principle for macroscopic particle |
| Answer» | |
| 214. |
Why can\'t we use de-Broglies principle for microscopic particles |
| Answer» Because microscopic particles are not seen by a naked eye | |
| 215. |
What is atomic number of Rb |
| Answer» 37<br>Rb= 37<br>The atomic no. of Rb. is 37.<br>The atomic number of Rb is 37. | |
| 216. |
What is the defference between orbital and orbit |
| Answer» \tOrbitOrbitalsAn orbit is the simple planar representation of an electron.An orbital refers to the dimensional motion of an electron around the nucleus in a three dimensional motion.It can be simply defined as the path that gets established in a circular motion by revolving the electron around the nucleusAn orbital can simply be defined as the space or the region where the electron is likely to be found the most.The shape of molecules cannot be explained by an orbit as they are non directional by nature.The shapes of the molecules can be found out as they are directional by nature.An orbit that is well defined goes against the Heisenberg principle.An ideal orbital agrees with the theory of Heisenberg’s Principles.\t | |
| 217. |
Properties of Mendeleev periodic table |
| Answer» Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group. | |
| 218. |
Mathmatical experrsion |
| Answer» | |
| 219. |
What is the syllabus of organic in class 11 |
| Answer» You can check syllabus here :\xa0https://mycbseguide.com/cbse-syllabus.html | |
| 220. |
Shape of p orbital |
| Answer» (?)=dumbled shape<br>Dumbled shape<br>Dumbbell shaps<br>Dumbbell | |
| 221. |
What is the number of photons of light with a wavelength of 4000 PM that provide 1 joule of energy |
| Answer» 0.223×10^-35.<br>2.014 ×10 to the power 15 | |
| 222. |
C=54.54% H=9.9% vapour density is 44 find the molecular formula |
| Answer» | |
| 223. |
Why chemistry is important?? |
| Answer» Thankyou prashant and yash goswami?<br>?<br>Chemistry is important because to get good % and marks in 12th board examinarions<br>Chemistry is important for us because by the chemistrywe can know things about our daily life how curd is formed etc which thing is essential for us | |
| 224. |
Justify the particle nature of matter. |
| Answer» | |
| 225. |
what is the number of h and s? |
| Answer» nahi mainu pta ke answer wrong aa ok Jagtar g<br>It\'s right. Gulabo<br>you\'s answer is wrong . jagtar mistri<br>H= 32 and S=27 | |
| 226. |
Who discover electron A j j thomsonB mical farady |
| Answer» J. J. Thomson<br>J j thomson<br>J. J. Thomson<br>J.J Thomson<br>J.J Thomson | |
| 227. |
Please define STP (standard temp pressure |
| Answer» STP\xa0in chemistry is the abbreviation for Standard Temperature and Pressure.<br>Temp. 0℃ pressure 1atm. | |
| 228. |
Isotone |
| Answer» The atoms of an element with same number of neutrons.<br>Isotone are the elements which have same number of neutrins in their nucleus | |
| 229. |
Difference between mass and weight |
| Answer» Mass is constant everywhere in the universe but weight varies with gravity.Weight=mass*acceleration due to gravity(g).?<br>Mass is a scalar quantity and weght is a vector quantity.Mass is independent of gravity whereas weight is dependent on gravity.Mass is the amount of substance contained in the body whereas weight is the force applied by the gravity<br>Mass cannot be changed if we move anywhere with any gravity but weight can be zero in space at having different acceleration to gravity we can feel weightlessness at at a different acceleration due to gravity | |
| 230. |
What is the meaning of sub shell??? |
| Answer» The shells which are present between the principal shells are known as sub-shells. The sub-shells are s,p,d andf<br>Mainly:- S ,P ,D ,F | |
| 231. |
CH4O+(Cr2O7)^-2+H^+will give CH2O + Cr^+3 + H2O |
| Answer» | |
| 232. |
How to learn the electricconfriguration in very simple methods |
| Answer» | |
| 233. |
What is electricconfriguration? |
| Answer» The distribution of electron into orbitals of an atom is called electronic configuration<br>Electronic configuration is defined as the distribution of electrons into various orbitals of an atom by using three principles.Aufbau principle states that in the ground state of the atoms the orbitals are filled in order of their increasing energies. Electrons first occupy the lowest-energy orbital and then enter into successive higher energy orbitals. The electrons enter into various orbitals in an increasing order of (n+l). | |
| 234. |
What\'s the plane motion in the orbit |
| Answer» | |
| 235. |
How many atoms are in 1l of water |
| Answer» One liter of water has 1000 grams.Number of moles is {tex}\\frac{1000}{18}{/tex} = 55.556 moles.The number of molecules is therefore 6.022{tex}\\times{/tex}1023{tex}\\times{/tex} 55.556 = 3.346 {tex}\\times{/tex}\xa01025 molecules.The number of atoms is 3 times larger because each molecule has three atoms, so there are 1.0038{tex}\\times{/tex}1026 atoms in a liter of water.<br>1L=1000gH2OMass of 1 mole H2O= 1*2+16=18gNo. Of moles in 1000gH2O= 1000/18=50.5moles(approx)No. of atoms present in 50.5 moles=50.5*6.022*10²³=???answer | |
| 236. |
Derivation of relationship between molarity and morality |
| Answer» Molality (m) : It is the number of moles of the solute dissolved per kilogram (kg) of the solvent. It is denoted by m.{tex}\\therefore{/tex} Molality (m) {tex} = \\frac{{{\\text{No}}{\\text{. of Moles of solute}}}}{{{\\text{Mass of solvent in kg}}}}{/tex}{tex}\\therefore \\,m = \\frac{{{W_2} \\times 1000}}{{{M_2} \\times {W_1}}}{/tex}Where W1 = mass of solventW2 = mass of soluteM2 = Molar mass of solute . Unit is mol/KgMolarity (m): It is the number of moles of the solute dissolved per litre of the solution. It is denoted by M.Molarity {tex} = \\frac{{{\\text{No}}{\\text{. of moles of solute}}}}{{{\\text{Volume of solution in litre}}}}{/tex}{tex}\\therefore \\;M = \\frac{{{W_2} \\times 1000}}{{{M_2} \\times {V_1}}}{/tex}where W2 = mass of solventM2 = molar mass of soluteV = Volume of solution. Unit is mol/LThe molarity and molality of a solution will be nearly same if the mass of solvent is nearly equal to the volume of solution. | |
| 237. |
Calculate the number of electrons which will together weigh one gram |
| Answer» Mass of an electron = 9.1\xa0{tex}\\times{/tex}\xa010-28 g9.1\xa0{tex}\\times{/tex}\xa010-28 g is the mass of = 1 electron1.0 g is the mass of =\xa0{tex}\\frac{1}{9.1 \\times 10^{-28}}{/tex}= 1.098\xa0{tex}\\times{/tex}1027\xa0electrons | |
| 238. |
Nacl +hcl gives what? |
| Answer» Nothing | |
| 239. |
Why alkali metals gives blue solution when it reacts wirh amonia? |
| Answer» Alkali metals dissolve in ammonia to form a blue colour solution. The blue colour of the solution is due to ammoniated electron which absorbs energy in the visible region of light and imparts blue colour to the solution.M + (x + y)NH3 →[M(NH3 )x ]+ + [e(NH3 )y ]− | |
| 240. |
Find the wavelength of the moving electron |
| Answer» Wave length of moving electron=Circumference of orbit=2πr... | |
| 241. |
The visible spectrum wavelenghth id |
| Answer» | |
| 242. |
What is the size of proton |
| Answer» The\xa0proton\xa0was 0.877±0.007 femtometers (m) | |
| 243. |
How many electons are present in 16g of CH⁴?? |
| Answer» Abhinay verma tum aide ho<br>Sorry to sayMr.. ABHINAY SHARMA IS WRONG Molar mass = 12 + 4 = 16 g 1 mole of CH₄ contains 6.022 x 10²³ atoms in 16 g 1 atom contains 6 + 4 = 10 electrons 6.022 x 10²³ atoms have 6.022 x 10²⁴ electrons<br>In one gram of CH4 no of electrons --C- 6H4- 4 Total - 10 So in 16 gram 160 electrons | |
| 244. |
What is the empercial formula for c19.57%,fe15.2%,n22.83%k42.39% |
| Answer» C6feN6K4 | |
| 245. |
What is radiation???? |
| Answer» Thanks Abhinay bhai<br>Radiation is a type of energy which do not need any medium to travel e. G - sunlight | |
| 246. |
General properties of covalent compounds |
| Answer» 2 - they have low boiling and melting points 3- formed by sharing of electrons<br>1 - covalent bonding is found in such compounds | |
| 247. |
morality |
| Answer» flexibility<br>Morality is defined as no of moles of solute present per litre of solution . SI Unit mol/L and is denoted by \'M\'. Morality = No of moles of solute/volume of solution in litres<br>The moles if solute particles present in given volute of solution.Units molar,mol per litre | |
| 248. |
Can i ask u a question |
| Answer» Sure | |
| 249. |
Calculate the number of atom in -i 1mole of nitrogen (n2 )ii |
| Answer» Ashish sah and nisha thankyou for showing your opinion in this question but your answer is wrong actually wrt answer is 1.2046but i dont know how this answer come .<br>2×6.023×10^23<br>No. of atoms = 14mol × 6.022 × 10^23 = 84.308 molecules of n2 = 84.308 × 2 = 168.616 atoms of n2<br>no. of atoms are14(N2)× 6.022× 10 rest to power 23=84.308 | |
| 250. |
Resonance structure of benzene ring containing ch2 as a group |
| Answer» You can take help from google | |