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.
| 2901. |
Octet rule...?? |
| Answer» Bhai mera koi acha wala dost nahi jata isiliye....waise ye challenger purana gentleman to nahi hai na ?....hame to lag raha ki yahi hai<br>Yrr school chahe to ja sakte hai hamlog with written permission of parents but jate nahi hai? | |
| 2902. |
Limitations of octet rule ..? |
| Answer» Oh hello...kaise ho?? Padhai kaise chal rahi hai....class hua aaj??<br>Yrr legendary tum kaun ho....itna to batao ki bhai ho ki bahen?...apni kabhi bat hui hai kya??<br>$$lim_{octet \\to 0} Molecule = true$$ | |
| 2903. |
Fazans law..? |
| Answer» Bhai ye anit...sm hai kya.....Hello anit<br>H school walo ke sath nahi padhte..... physicwallah ko follow karte hai....<br>Class over ho gya kya??? | |
| 2904. |
What is atomic hydrogen |
| Answer» Atomic hydrogen\xa0or oxy-hydrogen\xa0torch involves the formation of\xa0atomic hydrogen atoms\xa0that are produced by dissociation of dihydrogen with the help of an electric arc. | |
| 2905. |
What is formal charge...? |
| Answer» In chemistry, a formal charge is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity. | |
| 2906. |
No. Of hybrid orbital in CO2 .. {rply b4 6.30 pm } |
| Answer» Thnks<br>Its sp hybridised, as the no. of sigma bonds in CO2 is 2 | |
| 2907. |
C2H2 ,C2H4 (s- character in the hybridization of C) |
| Answer» | |
| 2908. |
Calculate the volume of 34g of NH3 at STP |
| Answer» 45.4 litres | |
| 2909. |
What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per500 mL? |
| Answer» 0.2 M | |
| 2910. |
Importance OF chemistry ? |
| Answer» What is this???<br>haha...?he nailed it??<br>Strain students and burden on teachers | |
| 2911. |
A violet colour light have wavelength 380 nm . Find its frequency and energy |
| Answer» have given that wavelength = 380 nm .. convert it into m by multiplying 10 ^ -9 and then put the formula that frequency = c / wavelength [c is the speedof light in vaccum which is equal to 3 × 10 ^ 8 m/s ] then u will have ur frequency = 7.8 × 10 ^ 14 second inverse ... and then put the formula E = h × frequency [h = 6.626 × 10 ^ -34 J/s] and then simplify it u will have ur ans as 4.88 × 10 ^ -20 J.... So , frequency = 7.8 × 10 ^ 14 Hz Energy = 4.88 × 10^ -20 J | |
| 2912. |
Hlo guys...... Meeting after 4 months..... ? How are u all? |
| Answer» Hey Naira, remember!?<br>Hlo | |
| 2913. |
What happens when alkali metals react with dihydrogen ? |
| Answer» Baap ko puchiye jaake<br>The alkali metals react with dihydrogen at about 673K (lithium at 1073K) and form hydrides.2M + H2\xa0--> 2M+H- | |
| 2914. |
What is the molecular mass of so4? |
| Answer» 96<br>Molar mass of sulphur (S) is 32Molar mass of oxygen (O) is 1632+4(16) = 32 + 64 = 96Molar mass of sulphuric acid i.e.\xa0\u200bSO4\u200b\xa0is 96.<br>Sulphur (s) has atomic mass = 32,oxygen (o)=16 molecular mass of So4=32+16 x 4=32+6496 | |
| 2915. |
Out of LiF and LiCl which has higher covalent character and why |
| Answer» lithium iodide is more covalent than lithium chloride because the electronegativity in halogens is in the following sequence F>Cl>Br>I.Thus flourine is most electronegative while iodine is least in halogens.Covalent character of bond increases down the group so i.e. FTherefore lithium iodide is more covalent than lithium chloride. | |
| 2916. |
Heya EveryOne ?\u200d♂️ |
| Answer» Me too<br>I am fine, what about you?<br>Heyy hru<br>Hii ... | |
| 2917. |
What is acid?? |
| Answer» 12:30 or near 4 or 5 O\'clock....?✌<br>Achha✌??? btw tumhe ek baat batani hai insta pe baadme btaungi? | |
| 2918. |
Mole fraction?? |
| Answer» Mole fraction represents the number of molecules of a particular component in a mixture divided by the total number of moles in the given mixture. It\'s a way of expressing the concentration of a solution. Mole Fraction formula. The molar fraction can be represented by X. | |
| 2919. |
Difference between molarity n molality?? |
| Answer» \tMolarityMolalityMolarity of a given solution is defined as the total number of moles of solute per litre of solution.Molality is defined as the total moles of a solute contained in a kilogram of a solvent.Mathematical expression is M = number of moles of the solute /Volume of solution given in terms of litres.Mathematical expression is m = Numbers of moles of solute/Mass of solvent in kgs m = (g ✕ 1000)/(W ✕ m).Depends on volume of the whole solution.Depends on the mass of the solvent.Unit sign expressed as (M).Unit sign expressed as (m).Molarity has a unit of moles/liter.Molality has units of moles/kg.\t | |
| 2920. |
Molality?? |
| Answer» | |
| 2921. |
Morality?? |
| Answer» How are you, Aadya Singh ...<br>MolarityIt is one of the most widely used\xa0unit of concentration and is denoted by M. It is defined as no. of moles of solute present in 1 liter of solution. Thus,Molarity\xa0=\xa0No.\xa0of\xa0moles\xa0of\xa0solute / Volume\xa0of\xa0solution(in\xa0Litres)<br>Hii, Gm... | |
| 2922. |
Normality?? |
| Answer» Normality in chemistry is one of the expressions used to measure the concentration of a solution. It is abbreviated as ‘N’ and is sometimes referred to as the equivalent concentration of a solution. It is mainly used as a measure of reactive species in a solution and during titration reactions or particularly in situations involving acid-base chemistry.As per the standard definition, normality is described as the number of gram or mole equivalents of solute present in one litre of a solution. When we say equivalent, it is the\xa0number of moles\xa0of reactive units in a compound. | |
| 2923. |
Parts per million?? |
| Answer» \tParts per million\xa0can be defined as the ratio of number of\xa0parts\xa0of the component to the total number of\xa0parts\xa0of all components of the solution multiplied by 106.\tIt is denoted by\xa0ppm. | |
| 2924. |
Mass percent?? |
| Answer» Mass per cent is a way of expressing a concentration or describing the component in a particular mixture. The solution composition can be described in mass percentage which shows the mass of solute present in a given mass of solution. The quantity of solute is expressed in mass or by moles. For a solution, the mass per cent is described as the grams of solute per grams of solution, multiplied by 100 to get the percentage.Mass per cent FormulaThe Mass per cent formula is expressed as solving for the molar mass also for the mass of each element in 1 mole of the compound. You can determine the mass percentage of each element with these masses. | |
| 2925. |
Limiting reagent?? |
| Answer» The reactant which reacts completely in the reaction is called\xa0limiting reactant or limiting reagent.The reactant which is not consumed completely in the reaction is called\xa0excess reactant . | |
| 2926. |
How many moles of methane are required to produce 22g of C022 on combustion? |
| Answer» CH4\xa0+ 2O2\xa0-> CO2\xa0+ 2H2OGRAM MOLECULAR MASS OF CO2\xa0= 12 +2(16) = 44gFrom the reaction it is clear that 1 mole of methane on complete combustion produces 44g (1 mole) of carbon dioxide.therefore moles of CH4\xa0required to produce 22g of CO2\xa0are:(22) * (1/44) =\xa01/2 moles | |
| 2927. |
What is stoichiometry?? |
| Answer» \tThe word ‘stoichiometry’ is derived from two Greek words - stoicheion (meaning element) and metron (meaning measure).\tStoichiometry deals with the calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction.\tThis is done using balance chemical equation. | |
| 2928. |
Hit n trial method?? |
| Answer» This method is also called trial and error method, or inspection method. In this method, coefficient before the formulae or symbols of the reactants and products are adjusted in such a way that the total number of atoms of each element only both the sides become equal. This is called material balance, or mass balance. In this method first of all, atoms of the element which appears least in the chemical equation should be balanced. Then, the next one, and so only. | |
| 2929. |
Limitations of Chemical equations ?? |
| Answer» \xa0A chemical equation has its own limitations. They do not provide information about:\xa0\tThe physical state of reactants and products Hence, the symbols ‘s’ for solid, ‘l’ for liquid, ‘g’ for gas and ‘vap’ for vapour are added.\xa0\tConditions such as temperature, pressure and catalyst affecting the reaction\xa0\tConcentration of reactants and products\xa0Hence, in some cases, for dilute ‘dil.’ and for concentrated ‘conc.’ are added.\xa0\tThe nature of the chemical reaction; whether it is reversible or irreversible reaction.\xa0\tSpeed of the reaction\xa0\tHeat changes accompanying the reaction; whether heat is given out or absorbed\xa0\tTime taken for completion of the reaction A reaction may or may not be complete, and the equation does not reveal it. | |
| 2930. |
Calculate the percentage composition of potassium hydrogen sulphate?? |
| Answer» \xa0Molecular mass of\xa0{tex}KHSO_(4)=39+1=32+64=136.0u{/tex}\xa0\xa0Percentage of potassium\xa0=(39u) / (136u)×100 = 28.68%Percentage of hydrogen\xa0=(1u) / (136u)×100 = 0.735%Percentage of sulphur\xa0=(32u) / (136u)×100 = 23.53%Percentage of oxygen\xa0=(64u) / (136u)×100 = 47.06% | |
| 2931. |
Determine the percentage of water of crystallization in pure sample of green vitriol?? |
| Answer» S o l u t i o n:The chemical formula of FeSo4 . 7 H2O= 55.8 + 32.1 + 16x4 + 7x18= 277.9The percentage of water of crystallization== (7 x 18) / 277.9 x 100 %= 45.34 % | |
| 2932. |
How much of copper is obtained from 100g of copper sulphate? |
| Answer» | |
| 2933. |
What is pyrophosphate?? |
| Answer» Pyrophosphates are phosphorus oxyanions that contain two phosphorus atoms in a P-O-P linkage. A number of pyrophosphate salts exist, such as Na₂H₂P₂O₇. Often pyrophosphates are called diphosphates. The parent pyrophosphates are derived from partial or complete neutralization of pyrophosphoric acid. | |
| 2934. |
Formula of hypochlorite?? |
| Answer» | |
| 2935. |
Formula of hypobromite?? |
| Answer» | |
| 2936. |
What is cyanide?? |
| Answer» A cyanide is a chemical compound that contains the group C≡N. This group, known as the cyano group, consists of a carbon atom triple-bonded to a nitrogen atom. In inorganic cyanides, the cyanide group is present as the anion CN⁻. Soluble salts such as sodium cyanide and potassium cyanide are highly toxic. | |
| 2937. |
What is radicals?? |
| Answer» A radical is an atom, molecule, or ion that has an unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most organic radicals have short lifetimes. | |
| 2938. |
Why s orbital has spherical shape?? |
| Answer» All s orbitals are spherical in shape and have a spherical symmetry.This means that the wave function will depend on the distance from the nucleus and not on the direction.In any atom,the size of the s orbital increases as the principal quantum number of the orbital increases but its geometrical shape remains same.. | |
| 2939. |
Which of the following has largest size?(a) Al (b) Al^+ (c) Al^++ (d) Al^+++ |
| Answer» | |
| 2940. |
What is solution. ....? |
| Answer» Mera ques. Post kyu nahi ho raha??<br>Yrr yek aur problem aa rahi hai....ham bas theory padhte jaa rahe hai without solving numerical.....iss tatah ki problem aa rahi hai.....aur kabhi milne ke bare me soche ho? UG kaha se karne ka soch rahe ho?<br>Bhai mera schedule bahot haptic ho gaya hai...sochte hai thode der bad...aise kar ke 5din ka chapter 10 din me bhi nahi ho pa raha | |
| 2941. |
Ionization enthalapy ? |
| Answer» Haa bhai kar diya maine...aap?<br>Pta nahi bhai...ab to khud ka hi sahara hai<br>Gm bhai.... | |
| 2942. |
Emmision spectra |
| Answer» Hi | |
| 2943. |
What is ionic bond...?? |
| Answer» Or we can say..... transfer of electron<br>Hii<br>Bond between metal nd metal | |
| 2944. |
What is covalent bond ?? |
| Answer» Hi<br>Hello<br>Bonding between metal nd nonmetal<br>A type of bond formed due to the shared pair of electrons between two species is called a covalent bond. | |
| 2945. |
On what factor of light number of electrons emitted by metal depends. |
| Answer» It depends on the intensity of brightness of light | |
| 2946. |
Write salient features of bhor\'s model for hydrogen atom . |
| Answer» | |
| 2947. |
What is Rhyberg constant?? |
| Answer» Thanks<br>In the science of spectroscopy, under physics, the Rydberg constant is a physical constant relating to atomic spectra. It is denoted by R∞\xa0for heavy atoms and RH\xa0for Hydrogen. Rydberg constant was first arising from the Rydberg formula as a fitting parameter. Later Neils Bohr has calculated it from fundamental constants. | |
| 2948. |
How many lone pairs are there in SF6 |
| Answer» | |
| 2949. |
The IUPAC name of the compound is -OHC – CH = CH – CH – CH = CH2CH2CH2CH2CH3 |
| Answer» Decanal 5,8 - ene | |
| 2950. |
Write the general electronic configuration of s,p and d block elements. |
| Answer» For "s" block element general electronic configuration is nS^1to2. For "p" block element general electronic configuration is nS^2 np^1to6 . For "d" block element general electronic configuration is (n-1)d^1to10 nS^1to2. And f block element general electronic configuration is (n-2)f^1to14 (n-1)d^0to1 nS^2. | |