InterviewSolution
Saved Bookmarks
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.
| 3101. |
Which is more covalent in character LiCl or CsCl. Why? |
| Answer» LiCl ,because the polarising powe of lithium ion is greater tha caesium ion | |
| 3102. |
Difference between nodes and radial nodes? |
| Answer» A node is a point where the electron probability is zero ... Radial node is a spherical surface where the probability of finding an electron is zero. The number of radial nodes increase with principle quontum number (n). Angular node is also called nodal plane<br>Hii | |
| 3103. |
Calculate the mass of caco3 |
| Answer» Hii annu and cutie pie<br>Hii<br>Molecular mass of CaCO3\xa0= 40\xa0× 1 + 1\xa0× 12 + 3\xa0× 16 = 40 + 12 + 48 = 100 u.\xa0 | |
| 3104. |
Calculate the mass of (NH4)2CO3 required to prepare 500ml of 0.05 molar queous solutions |
| Answer» | |
| 3105. |
homogeneous ND heterogeneous mixture |
| Answer» Koi nahi hai yaha<br>Sona lavish kaha hai<br>The mixture whose concentration is uniform throughout the mixture called homogeneous mixture. The mixture whose concentration is non-uniform throughout the mixture called heterogeneous mixture. | |
| 3106. |
Calucate the energy associatedWith the first orbit of He+. What is the radius of this orbit? |
| Answer» I love you<br>n=1, z=2rn =(0.0529 nm Multiple with 1 power 2 ➗ by 2rn=0.02645<br>n=1,z=2<br>use formula r=0.53*n2/z | |
| 3107. |
Balance in acid medium cr2 O7 2 - Plus H plus plus I minus gives c r + 3 plus I two + H2O |
| Answer» | |
| 3108. |
E=2.5ev. Calculate E(joule) |
| Answer» | |
| 3109. |
Write all the possible isomers which can be obtained from the molecular formula C4H10O |
| Answer» | |
| 3110. |
Write the mathematical expression of scientific notation. |
| Answer» | |
| 3111. |
If X= A cube then the ratio of relative error in X to relative error A is |
| Answer» i dont no<br>8408848403 | |
| 3112. |
Calculate the mass of 44.8 litres of carbon dioxide |
| Answer» Volume of carbon dioxide gas = 44.8 L Since at STP ; 22.4 L = 1 mole of gas =2 moles of gas.Hence we can say that at STP; the\xa044.8 L of carbon dioxide gas contains 2 moles of gas. Here STP indicates the standard temperature and pressure conditions which is\xa022.4 L volume, at 1 atmospheric pressure\xa0and the temperature at 273 K. | |
| 3113. |
Which book is best for solving questions for class 11th and 12th NEET. ? |
| Answer» S l arova<br>Follow dc pandey for better practice with combo of ncert<br>Is MTG good book???<br>NCERT Exampler<br>NCERT | |
| 3114. |
Best book for chemistry except NCERT ? |
| Answer» Pradeep\'s new coarse<br>Rc mukherjee<br>Text book | |
| 3115. |
Name the intermolecular force between cl2 and CB r4 |
| Answer» | |
| 3116. |
Which has the highest electron affinity |
| Answer» Cl<br>Cl | |
| 3117. |
R u opting for science stream prachi |
| Answer» All the 5 subjects...with additional physical education...<br>Yes and you PCB with computer science | |
| 3118. |
What is Charles law please?? ans me ? |
| Answer» Hii<br>Hi<br>V1/T1=V2/T2 | |
| 3119. |
what is Charles law ??please ans me ? |
| Answer» V1/T1=V2/T2<br>I don\'t know | |
| 3120. |
? water?? |
| Answer» ???water , it\'s molecule ?<br>Hii | |
| 3121. |
Compare the mass and charge of the three fundamental sub atomic particles |
| Answer» | |
| 3122. |
Define mole concept |
| Answer» The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.<br>Mole Conceptn = N/NA\xa0...Molar mass of a Substance = (Mass of the Substance in grams)/(Number of\xa0Moles) ...Number of\xa0Moles\xa0= (Mass of the Sample)/(Molar Mass) ...Number of Atoms or Molecules = (Number of\xa0Moles)*(6.022*1023) ...1 amu = (1gram)/(6.022*1023) = 1.66*10-24\xa0grams. | |
| 3123. |
Define dalton atomic theory |
| Answer» Dalton’s atomic theory was a scientific theory on the nature of matter put forward by the English physicist and chemist John Dalton in the year 1808. It stated that all matter was made up of small, indivisible particles known as ‘atoms’. The postulates and limitations of Dalton’s atomic theory are listed below.Postulates of Dalton’s Atomic Theory\tAll matter is made up of tiny, indivisible particles called atoms.\tAll atoms of a specific\xa0element\xa0are identical in mass, size, and other properties. However, atoms of different element exhibit different properties and vary in mass and size.\tAtoms can neither be created nor destroyed. Furthermore, atoms cannot be divided into smaller particles.\tAtoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds.\tAtoms can be rearranged, combined, or separated in chemical reactions. | |
| 3124. |
The percentage of carbon is Ca(HCO3)2 IS |
| Answer» As we know, mass percent of an element= mass of the element/ molar mass of the compound givenIn Ca(HCO3)2, the mass of carbon is 24g and the molar mass of the compd. is 162g. Mass % of C = 24/162× 100= 400/27% | |
| 3125. |
State Avogardro\'s law |
| Answer» It states that V(volume) is directly proportional to the no. of atoms<br>Equal volume of all gases under similar condition of temperature and pressure contain equal number of atoms | |
| 3126. |
How to molarity calculate |
| Answer» The equation for\xa0calculating molarity\xa0is the ratio of the moles of solute whose molarity is to be calculated and the volume of solvent used to dissolve the given solute.M = n/VHere,M is the molality of the solution that is to be calculatedn is the number of moles of the solute\xa0V is the volume of solution given in terms of litres<br>I don\'t know | |
| 3127. |
Scientist notation meaning |
| Answer» Scientific notation is a way of expressing real numbers that are too large or too small to be conveniently written in decimal form. | |
| 3128. |
Yes seriously |
| Answer» Kaha ho tum<br>Gaurav Seth you have copied the 10 th class English chapter summary<br>Anil does not hand over the thief to the police because he realized that Hari had learnt his lesson and had changed for the better. Otherwise, he would never have come back and kept the money at the same place from where he had stolen it. Anil even knew how Hari cheated him of a rupee a day while buying the day’s supplies. But he never said anything to him. This is such a case where most people would have handed him over to the police. Anil was different from such employers because he was a modest and trusting man. He had offered to teach Hari how to cook and also to educate him. When he found out that Hari had stolen the money, but had kept it back, he knew that it was Hari’s conscience that had made him do so. Hari could have easily run off with the money, but he did not. This made Anil give him another chance and build him into a better person that he could already see him becoming. | |
| 3129. |
Hey guys back to school from 1 September ??? |
| Answer» Seriously<br>Okay Sona<br>internet...... is always not true ....<br>But I saw on internet that schools from 9 to 12 are going to be reopen on 1 September<br>this is not true.. | |
| 3130. |
What is mol of 5.6 litres of O2 at STP? |
| Answer» \xa0First and foremost, keeping in mind that at room temperature, Oxygen is a gas.So, Volume of Oxygen(O2) given = 5.6L.Finding moles, Moles=Volume/22.4.Moles= 5.6/22.4=1/4moles.So, finding mass of O2= moles × Mol. Wt.Mass( in grams) = 1/4 × 32. We have taken 32 as oxygen is is combined state O2, so 16×2=32.We get, mass =8 grams. | |
| 3131. |
What is mol of 6.022×10^23 molecules of H2O |
| Answer» 1 mol | |
| 3132. |
What is SI unit of mole fraction? |
| Answer» NO unit ,Because it is a ratio , mole fraction is a unitless expression . The mole fraction of all components of a solution, when added together , will equal 1 | |
| 3133. |
2 moles of A and 3moles of B react to form AB. A+B---- AB. What is the limiting reagent |
| Answer» | |
| 3134. |
What is flux and its types |
| Answer» \xa0Flux:\xa0 It is the substance added to molten metals to bond with impurities that can be readily removed.\xa0Types of flux:\xa0Fluxes are of two types, viz, acidic flux and basic flux.\xa0(a) Acidic flux:\xa0It is an acidic oxide (oxide of a non-metal) like SiO2, P2O5, B2O3\xa0(from borax). It is used to remove basic impurities like CaO, FeO, MgO etc. The acidic flux combines with a basic impurity to form a slag.(b) Basic flux:\xa0It is a basic oxide (i.e. oxide of a metal) like CaO (obtained from limestone, CaCO3), MgO (from magnesite. MgCO3), haematite (Fe2O3) etc. It is used to remove acidic impurities like SiO2, P2O5\xa0etc. The basic flux combines with an acidic impurity to form a slag.Thus, slag can be defined as a fusible mass, which is obtained when a flux reacts with an infusible, acidic or basic impurity present in the oxide ore. | |
| 3135. |
What is g-equivalent |
| Answer» Ok Annu ??❤️❤️<br>Google pe sarch kar lo | |
| 3136. |
What are limiting reagents |
| Answer» Thank you so much for the definition bcoz I was eagerly searching for that ????<br>Limiting reagents are the substances that are\xa0completely consumed in the completion of a chemical reaction.\xa0They are also referred to as limiting agents or limiting reactants. According to the\xa0stoichiometry\xa0of chemical reactions, a fixed amount of reactants is required for the completion of the reaction. Let us consider the following reaction of formation of ammonia:3H2\xa0+ N2\xa0→ 2NH3 | |
| 3137. |
SI unit of density |
| Answer» Kg per meter cube<br>3Kg/m<br>SI unit of density is kg/m3. ? | |
| 3138. |
What is Heisenberg uncertainty |
| Answer» According to Heisenberg ,it is impossible to measure both the position and momentum of moving particle with accuracy.\tIf value of position is small ,it can be measured accurately but not momentum.\tIf value of momentum is small it is measured accurately but not the position.Mathematically that means:ΔxΔp > h/2\xa0π | |
| 3139. |
Define law of conservation of mass |
| Answer» According to the law of conservation of mass matter cen neither be created nor destroyed<br>Acc. to this law, mass can neither be created or nor destroyed in a chemical reaction. The total mass in reactant side must be equal to the total mass in product side. | |
| 3140. |
Convert 450 pm into SI unit and write the answer in scientific notation upto 2 significant figures. |
| Answer» Please sir<br>Sir please give me full solution<br>4.5 *10^2this is the answer | |
| 3141. |
Calculate the wave number corresponding of the following wave length 1 3000 |
| Answer» Ufuf | |
| 3142. |
What is the oxidation number of Mn in Mno-4 and C in CH2CL2 |
| Answer» Mn is 8 and C is 0 | |
| 3143. |
What is the process of osmosis |
| Answer» Osmosis is the process in which solvent molecules moves through a semi-permeable membrane from a region of higher concentration to a region of lower concentration until the amount of fluid is equalised on both sides of the semipermeable membrane. | |
| 3144. |
Define equilibrium state |
| Answer» | |
| 3145. |
Calculate the number of atoms of the constituent element in Na2Co3 |
| Answer» No. Of atoms =given mass /molar mass * avogedro no. *atomicity | |
| 3146. |
Why covalent compiunds have low melting point than ionic compounds |
| Answer» Covalent compounds have bonds\xa0where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include\xa0lower melting points\xa0and electrical conductivity compared to\xa0ionic compounds.\xa0The\xa0melting point\xa0is\xa0low\xa0due to weak van der Waal\'s forces of attractions between the\xa0covalent\xa0molecules. The force of attraction between the molecules of a\xa0covalent compound\xa0is very weak.<br>Covalent compounds have bonds\xa0where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include\xa0lower melting points\xa0and electrical conductivity compared to\xa0ionic compounds.\xa0The\xa0melting point\xa0is\xa0low\xa0due to weak van der Waal\'s forces of attractions between the\xa0covalent\xa0molecules. The force of attraction between the molecules of a\xa0covalent compound\xa0is very weak. | |
| 3147. |
which part deleted of chapter 4 in chemistry |
| Answer» On July 7, HRD Minister Ramesh Pokhriyal announced a major CBSE syllabus reduction with 30% of the syllabus slashed for the year 2020-21 for classes 9 to 12 because of the reduction in classroom teaching time due to the Covid-19 pandemic and lockdown.CBSE has rationalized the syllabus with the help of suggestions from NCERT and the same has been notified by a new CBSE notification as well.Click on the links:Revised Syllabus:\xa0<a href="http://cbseacademic.nic.in/web_material/CurriculumMain21/revisedsyllabi/SrSecondary/REVISEDChemistry_2020-21.pdf">http://cbseacademic.nic.in/web_material/CurriculumMain21/revisedsyllabi/SrSecondary/REVISEDChemistry_2020-21.pdf</a>\xa0Deleted portion:<a href="http://cbseacademic.nic.in/web_material/CurriculumMain21/revisedsyllabi/Deduction/DELETEDChemistry_2020-21.pdf">http://cbseacademic.nic.in/web_material/CurriculumMain21/revisedsyllabi/Deduction/DELETEDChemistry_2020-21.pdf</a>\xa0 | |
| 3148. |
How much Potassium chlorate should be heated to produce 2.24L of oxygen at NTP? |
| Answer» | |
| 3149. |
Which of the species have similar shape and why ?NO2-, NO2+, CO2, O3 |
| Answer» | |
| 3150. |
Hey..5-6 days ke bad phir suspend ho jayenge...so plz hurry.. |
| Answer» | |