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.
| 401. |
27g of al will react completely with how mamy grams of oxygen |
| Answer» 24 g | |
| 402. |
Show the decomposition of Caco3 follow law of conservation of mass |
| Answer» CaCO3-----CaO+CO2 | |
| 403. |
Sir i need important questions for class 11 2019 |
| Answer» | |
| 404. |
Explain Azimuthal laws? |
| Answer» The azimuthal quantum number, ℓ, is the quantum number associated with the angular momentum of an atomic electron. | |
| 405. |
how to make achart on ostwald process? |
| Answer» | |
| 406. |
Atomic mass unit,formula mass Calculation and molecular mass book back questions |
| Answer» You can get NCERT solutions here :\xa0<a href="https://mycbseguide.com/ncert-solutions.html">https://mycbseguide.com/ncert-solutions.html</a> | |
| 407. |
If the speed of light is 3.0×(10)8 m s-1 , calculate the distance covered by light in 2.00ns |
| Answer» 6m/sec<br>Distance covered=speed × time = 3.0 ×(10)8 ms-1×2.00ns×(10)9/1ns = 6.00×(10)-1m = 0.600m | |
| 408. |
Explanation of photoelectric effect |
| Answer» It is the phenomenon in which when light of suitable frequency falls on a metal surface then electron eject out it is known as photoelectric effect And read ncert | |
| 409. |
Convert 15 ppm into molality where glucose is the solute and water is the solvent. |
| Answer» Plzzz ans | |
| 410. |
Convert 1 m into mass percentage where KI is the solute and water is the solvent. |
| Answer» Plzz ans.... | |
| 411. |
Why half filled and fully filled orbitals are more stable |
| Answer» The exactly half-filled and fully filled orbitals have greater stability than other configurations. The reason for their stability are symmetry and exchange energy.(a) Symmetry: The half-filled and fully-filled orbitals are more symmetrical than any other configuration and symmetry leads to greater stability.(b) Exchange Energy: The electrons present in the different orbitals of the same sub-shell can exchange their positions. Each such exchange leads to the decrease in energy known asExchange Energy. Greater the number of exchanges, greater the exchange energy and hence greater the stability. As the number of exchanges that take place in the half-filled and fully-filled orbitals is maximum, thus exchange energy is maximum and hence maximum stability. | |
| 412. |
Calculate energy of one mole of protons of radiation whose frequency is 5×10¹⁴ Hz. |
| Answer» Energy (E) of one photon = E = hvwhere h = 6.626\xa0{tex}\\times{/tex}\xa010-34 Js.\xa0{tex}\\nu{/tex}\xa0= 5\xa0{tex}\\times{/tex}\xa01014 s-1{tex}\\therefore E = \\left( 6.626 \\times 10 ^ { - 34 } \\times 5 \\times 10 ^ { 14 } \\right){/tex}{tex}= 3.313 \\times 10 ^ { - 19 } J{/tex}Energy of 1\xa0mole\xa0of photon{tex}= \\left( 3.313 \\times 10 ^ { - 19 } J \\right) \\times \\left( 6.022 \\times 10 ^ { 23 } \\mathrm { mol } ^ { - 1 } \\right){/tex}= 1995.1\xa0kJmol-1 | |
| 413. |
Describe 20 natural phenomena which can be described with the help of chemistry. |
| Answer» | |
| 414. |
Calculate mass of one molecule of ammonia |
| Answer» 1 mole of ammonia weighs 17 g.1 molecule of ammonia = (17 / 6.023 x 1023) = 2.82 x 10-23 g = 2.82 x 10-20 kg. | |
| 415. |
What is a quantum no and its all parts and defination also |
| Answer» | |
| 416. |
Describe few solution for disposal of electronic wastage with the help of chemistry |
| Answer» Recycling raw materials from end-of-life electronics is the most effective solution to the growing e-waste problem. Most electronic devices contain a variety of materials, including metals that can be recovered for future uses. By dismantling and providing reuse possibilities, intact natural resources are conserved and air and water pollution caused by hazardous disposal is avoided. Additionally, recycling reduces the amount of greenhouse gas emissions caused by the manufacturing of new products. Another benefit of recycling e-waste is that many of the materials can be recycled and re-used again. Materials that can be recycled include "ferrous (iron-based) and non-ferrous metals, glass, and various types of plastic." “Non-ferrous metals, mainly aluminum and copper can all be re-smelted and re-manufactured. Ferrous metals such as steel and iron can be also be re-used." Due to the recent surge in popularity in 3D printing, certain 3D printers have been designed (FDM variety) to produce waste that can be easily recycled which decreases the amount of harmful pollutants in the atmosphere.[80] The excess plastic from these printers that comes out as a byproduct can also be reused to create new 3D printed creations. | |
| 417. |
Show the MgO bond . |
| Answer» | |
| 418. |
Write l and m fir 4th electron in 3d orbital |
| Answer» O | |
| 419. |
Levis dot Structure of CH3COOH |
| Answer» We cant make the structure but you can check it on Google | |
| 420. |
What is the volume of oxygen required for complete oxidation of NH3 to nitric oxide?❔❓ |
| Answer» | |
| 421. |
No. Of electrons in 2.8 g ethene is |
| Answer» Molar mass of C2H4 (ethene) = 2×12+4×1 = 28 gMoles of ethene = Given mass / Molar mass =2.8g/28g mol^-1 =0.1 mol1 mole = 6.022 × 10^23 atoms0.1 mole = (6.022 ×10^23 atoms/1 mole)× 0.1 mole = 6.022 ×10^22 atoms 1 atom of C2H4 has electrons = 106.022×10^22 atoms of C2H4 have electrons = 6.022 ×10^22 ×10 = 6.022 ×10^22 electrons | |
| 422. |
Limiting regent |
| Answer» Limiting regent is define as the reactants which consumed first limits the amount of product formed.....<br>It is the element which is present in lesser amount than required | |
| 423. |
30.00 how much significant figure are there? 3 or 4? |
| Answer» There are for significant figure<br>How 3 why nt 4?<br>3 | |
| 424. |
For n=3 , l=2, ml=-1,-2,0,1,2 I\'m which orbital it lie |
| Answer» It could be written as - 3d^10<br>It lies in d orbital | |
| 425. |
Basic difference between ACCURACY AND PRECISION? |
| Answer» Thanks.This help me a lot<br>Well suppose an experiment is conducted and observations are noted down.Now acuarry means that how correct the observation is to the true value,but precision means how close the observation is to each other.HOPE YOU LIKE THIS BASIC DIFFERENCE.<br>\t Basis Accuracy PrecisionDefinitionIt could be defined as the level of correctness of a measurement to its true value.It could be defined as the sharp exactness of a measurement.Measurement MethodHas one factor used for measuring.Has multiple factors for measurement.Mutual RelationshipAccurate items have to be precise in most cases.Precise items may or may not be accurate.\t | |
| 426. |
Is quanta same as photon??? Or photons and quanta are equal?? |
| Answer» Quanta and photon both are same but when we talk about energy then we use photon for sun light<br>Yes they are same.. Quanta term was given by Albert Einstein<br>A quanta is a particle of E.M. Radiation but a photon is a special type of quanta particle which is the small pocket of energy of visible light.<br>One quantum of electromagnetic energy is called a photon. The plural of quantum is quanta. The concept of photons and quanta comes from quantum mechanics and quantum theory. | |
| 427. |
Describe few solution for disposal of electronic waste with the help of chemistry. |
| Answer» | |
| 428. |
Numericals on law of multiple proportion |
| Answer» | |
| 429. |
What is the difference btw 2.0g and 2.00g mass and which is more precise mass |
| Answer» 2.00 is more precise as it tells mass upto 2 decimal places<br>2.00 is the more precise mass | |
| 430. |
What is eistein equation? |
| Answer» Einstein equation is E=mc^2<br>The Einstein Field Equation (EFE) are also known as Einstein’s equation. There are the set of ten equations extracted from Albert Einstein’s General Theory of Relativity. The EFE describes basic interaction of gravitation. The equations were first published in 1915 by Albert Einstein as a tensor equation. | |
| 431. |
how many moles of sulphur will be produced when 2 moles of H2S reacts with 11.2 of SO2 at N.T.P |
| Answer» This is a simple question of Limiting Reagent.Here is the balanced Equation : 2H2S +SO2{tex}\\rightarrow{/tex} 2H2O + 3SThus if 2 moles of H2S reacts with 1 mol of SO2 then 3 moles of S will be formedBut in the given condition, SO2 is only half mole (11.2 L of gas at STP represents half mole), thus it is limiting Reagent.Thus if 1 mol of SO2 gives 3 moles of sulfur, then 0.5 Moles of it will give 1.5 moles of sulfur. | |
| 432. |
What is the molality of aqueous solution containing 2.0 g MgO in 100g of water? |
| Answer» 0.020 m | |
| 433. |
How we will get to know that we have to calculate de broglie wavelength?? |
| Answer» | |
| 434. |
What is form chemicals |
| Answer» | |
| 435. |
How co2 is formed? |
| Answer» When combination reaction between C and O2 takes place | |
| 436. |
Is hydrogen a metal or a non metal or a metalloid |
| Answer» Non metal (exception)<br>Not be cleared till now by chemists but it is determined as non metal now<br>It is non metal<br>Hydrogen is a gas. So it is non -metal. | |
| 437. |
How to calculate bond order? |
| Answer» | |
| 438. |
Explain bohr\'s model |
| Answer» | |
| 439. |
Calculate wave no for longest wavelength transition in the balmer series of hydrogen atom |
| Answer» 1.5236 × 106 m–1 see ncert | |
| 440. |
Calculate the number of molecules present in100.0g of water |
| Answer» 5.56 answer | |
| 441. |
What is the viscosity of oil |
| Answer» | |
| 442. |
Calculate the no. of neutron in 12×10^25 atoms of oxygen. mass no. 17....send me process? |
| Answer» Note: While the question says that the mass no. of oxygen is 17, in reality it is 16. However since the question asks for it I am taking the value as 17.Atomic no. is the number of electrons = no. of protons present in an atom.Atomic Mass is the sum of the number of protons and neutrons present in an atom.Let\xa0Atomic number = P = 8Let Atomic mass = N + P = 17N = 17 - 8N = 9Therefore there are 9 neutrons ina single atom of oxygen.Therefore total no. of neutrons = 9 × 12 × 10^25 = 108 × 10^25 = 1.08 × 10^27Answer1.08 × 10^27 neutrons.☆Note: Once again, while the question says that the mass no. of oxygen is 17, in reality it is 16. However since the question asks for it I am taking the value as 17. | |
| 443. |
narendra avasthi book question solution |
| Answer» | |
| 444. |
some basicconcept of chemistryquestion solution |
| Answer» | |
| 445. |
some basic concept of chemistry question solution |
| Answer» Ask the question bro | |
| 446. |
Structure of K2Cr2O7 |
| Answer» | |
| 447. |
What is mole consept |
| Answer» The avagadro number is 6.022×10²³<br>Mole concept is a concept dealing with the relationship between molecular mass , molar mass(same numerical as molecular mass , but units are grams) and the number of particles in one mole ........the number is called avagadro number.....and is fixed. | |
| 448. |
No.of molecules liquid state ma jada hote hai kya |
| Answer» Ok thnku<br>No no. of molecules remains constant in all states | |
| 449. |
What is molecular |
| Answer» | |
| 450. |
Please give me some questions to find out the no. of atoms |
| Answer» Anything that have mass and occupies space is called matter . matter can be classified into 2 ways1: physical classification of matter2: chemical classification of matter<br>How many Mg atoms are in 5.7892 mol of Mg(NO3)2?How many N atoms does the sample contain?How many O atoms does the sample contain?<br>What is matter | |