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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.
| 4651. |
Born haber cycle. |
| Answer» The Born–Haber cycle is an approach to analyze reaction energies. ... The lattice enthalpy is the enthalpy change involved in the formation of an ionic compound from gaseous ions (an exothermic process), or sometimes defined as the energy to break the ionic compound into gaseous ions (an endothermic process). | |
| 4652. |
Why is benzene nitrated better than phenol |
| Answer» Because of -m effect | |
| 4653. |
Why chlorine have maximum electron gain enthalpy? |
| Answer» The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction. | |
| 4654. |
Electrochemical.cell full explaination with working |
| Answer» An electrochemical cell is a device that can generate electrical energy from the chemical reactions occurring in it, or use the electrical energy supplied to it to facilitate chemical reactions in it. These devices are capable of converting chemical energy into electrical energy, or vice versa. A common example of an electrochemical cell is a standard 1.5-volt cell which is used to power many electrical appliances such as TV remotes and clocks. | |
| 4655. |
What is the meaning of alkyl? |
| Answer» Removal of one hydrogen atom from saturated hydrocarbon i,e alkane forms a special group called alkyle.? | |
| 4656. |
How to convert butane to but-1-ene |
| Answer» If butane have double bond in the first position than we can convert butane into but-1-ene | |
| 4657. |
H bonding |
| Answer» | |
| 4658. |
Explain why boric acid behaves as a weak monobasic lewis acid ? |
| Answer» | |
| 4659. |
What are quarks ? |
| Answer» Electrone and protons are made up of a elementary element called quark ....OrFundamentals unit of electron and proton is called quark | |
| 4660. |
What is diogonal relationship |
| Answer» You may get better explanation and tricks contact me [email\xa0protected]<br>\tThe similarity in the properties of definite pairs of diagonally adjacent elements in the second and third periods of the periodic table is called diagonal relationship.\tIn s-block elements Lithium is the first element of group 1 whereas Beryllium is the first elementsof Group 2.\tSome of their properties do not match with the properties exhibited by other elements of their group.\tInstead their properties resemble the properties of the second element of the following group due to the similarity in ionic sizes and /orcharge/radius ratio of the elements.\tConsequently lithium and magnesium have similar properties whereas Beryllium and Aluminium exhibit similar properties. | |
| 4661. |
What are the properties of ionic compound |
| Answer» Properties of ionic compound are: they formcrystals, they have high melting and boiling point ,they have higher enthalpy of fusion and vaporization compare to molecule, they are hard and brittle ,conduct electricity when dissolved in water ,they are good insulator. | |
| 4662. |
If hydration enthalpy of lithium is very high then why insoluble in water |
| Answer» Elementary lithium is not very water soluble, but it does react with water. Lithium compounds such as lithium chloride, lithium carbonate, lithium phosphate, lithium fluoride and lithium hydroxide are more or less water soluble. Lithium hydroxide for example has a 129 g/L solubility. | |
| 4663. |
Inductive effect |
| Answer» When an electron-releasing or an electron-withdrawing species is introduced to a chain of atoms (generally a carbon chain), the corresponding negative or positive charge is relayed through the carbon chain by the atoms belonging to it. This causes a permanent dipole to arise in the molecule and is referred to as the inductive effect. | |
| 4664. |
Functional isomer |
| Answer» For example= alcohol and ether, acids and ketones , 1°,2°,3° Amines, etc.<br>Compound having same molecular formula but different functional group is known as functional isomer | |
| 4665. |
Why alkali metals not found in nature |
| Answer» Alkali metal has one electron each in the valence subshell of their atoms. Since they have only one electron in valence subshell, therefore, they lose easily, owing to their low ionisation energies. Therefore, alkali metals are highly reactive chemically and do not exist in the free or native state.<br>Alkali metals are not found in nature because it can flow in water and deep | |
| 4666. |
When kb and Nu- are same |
| Answer» You can ask me @ 7033367793<br>What you want to say avni | |
| 4667. |
Explain Lee Chatelliers principle |
| Answer» | |
| 4668. |
Oxidation-reduction reaction are complementary. Explain |
| Answer» | |
| 4669. |
What is protic acid? |
| Answer» An acid that forms +ve HYDROGEN ions (also called oxonium ions) in aqueous solution is called protic acid. These compounds can easily release a positive hydrogen(proton). Examples are HCl, H2SO4, HNO3. | |
| 4670. |
What are the types of chemical equations |
| Answer» Combination, decomposition, displacement, double displacement, oxidation, reduction, redox, endothermic ,exothermic reactions | |
| 4671. |
Classification of organic compounds |
| Answer» | |
| 4672. |
How Nacl is prepared from sea water ? What is crude sodium chloride ? What are its uses? |
| Answer» | |
| 4673. |
Define z(c.f) |
| Answer» | |
| 4674. |
What are buffer solutions |
| Answer» a solution which resists changes in pH when acid or alkali is added to it.<br>The solution which resist change in PH on dilution or with addition of small amount of acid or alkali are called buffer solution. Ex. Blood | |
| 4675. |
explain why covalent compounds like alcohol and carbohydrates are soluble in water |
| Answer» Organic compounds mainly contains carbon and hydrogen. Hydrocarbon chain is hydrophobic or oleophilic. Polar hydrocarbons dissolve in water due to formation of hydrogen bonds with water.As hydrocarbon part increases, solubility in water decreases due to increase in oleophilic part. Thus hydrocarbons are miscible in organic solvents. | |
| 4676. |
How to prepare for organic |
| Answer» Watch play chemistry (IMPACT naming ) on youtube | |
| 4677. |
Sp black ke tatvon ke name |
| Answer» Li-lithiumNa-sodiumK-pottassiumRb-RubidiumCs-Ceasium | |
| 4678. |
what is le chaterlior principal ? example |
| Answer» A/c to this principle change in any of the factor that determine the equilibrium condition of the system will cause the system to change in such a manner so as to reduce or to counteract the effect of the change it is applicable to all physical and chemical equilibrium<br>Le Chatelier’s principles, also known as the equilibrium law, are used to predict the effect of some changes on a system in chemical equilibrium (such as the change in temperature or pressure). The principle is named after the French chemist Henry Louis Le Chatelier.Le Chatelier said that equilibrium adjusts the forward and backward reactions in such a way to accept the changes affecting the equilibrium conditions.When factors like concentration, pressure, temperature, inert gases that affect equilibrium are changed, the equilibrium will shift in that direction where the effects caused by these changes are nullified. | |
| 4679. |
Calculate the enthalpy change for the reactionH2(g) + cl2(g) =2Hcl Given: GH-H =430Cl-Cl=242H-Cl=427 |
| Answer» ΔH=(430+242)-2(427)=-182 | |
| 4680. |
Salt analysis chart |
| Answer» | |
| 4681. |
temporary hardness of water is removed by boiling . asign reas one for the same |
| Answer» | |
| 4682. |
What is borex test and formula involved in it |
| Answer» | |
| 4683. |
What is the nature of acetylene |
| Answer» Acidic nature | |
| 4684. |
What is ionization enthalaphy |
| Answer» The enthalpy change associated with the removal of the first electron from an isolated gaseous atom in its ground state is called first ionization enthalpy.Ionization enthalpy depends on the following factors:\tPenetration effect\tShielding effect\tElectronic configuration | |
| 4685. |
How is oxygen more electronative than carbon |
| Answer» Both carbon and oxygen lie in same period . We know that in going from left to right size of the atom decrease the electronegative increase | |
| 4686. |
How to gain marks 90% sir |
| Answer» Do hardwork,not wish directly a fruits of anything<br>Focus on study not in marks because if you study then automatically you will get good marks not 90% you can score 99%.<br>Hard work with smart work<br>Pd le abhi time ha | |
| 4687. |
Where are the answer of practice paper questions |
| Answer» In Google | |
| 4688. |
Polar covalent bond?? |
| Answer» Gud yogita<br>It is the bond formed b/w heteroatomic(different)molecules of diff electronegativity*. Charge shifts to more e-ve* element and +ve charge to less e-ve*Thus, positive and negative poles r produced and bond become completely polar bond.<br>Polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms.Example: Hydrogen chloride (HCl) molecule.The bonding of hydrogen and chlorine atoms leans more towards Cl atom because Cl is more electronegative in nature than the hydrogen. Thus the shared pair of electrons lies not exactly in between the bond but lean towards chlorine. Due to this Cl atom acquire a slight negative charge, and H atom acquire slight positive charge. | |
| 4689. |
What is london forces |
| Answer» The force which are exerted only on nonmetal<br>Weak forces of attraction that result when electrons in 2 adjacent atoms create temporary dipoles | |
| 4690. |
Structure of 3-(carboxy methyl)hexane 1,6dioic acid |
| Answer» | |
| 4691. |
How to make C6 H10StreoIsomer structure |
| Answer» | |
| 4692. |
What i made in chemistry project |
| Answer» | |
| 4693. |
Find the oxidation number of N in HgNH2Cl |
| Answer» Here hg has +1 oxidation number so nitrogen has -2 oxidation state<br>Mercury has variable valency | |
| 4694. |
Effect of temperature on rate of reaction |
| Answer» For endothermic reactions:On increasing temperature- rate of reaction increases On decreasing temperature- rate of reaction decresesFor exothermic reaction:On increasing temperature- rate of reaction decreses On decreasing temperature- rate of reaction increases<br>The rate of reaction increases considerably with an increase in temperature.The rates of many reactions are approximately doubled or tripled for every 10oC rise in temperature.The temperature coefficient of a chemical reaction is defined as the ratio of the specific reaction rates of a reaction at two temperature differing by 10oC.μ = Temperature coefficient= k(r+10)/kt | |
| 4695. |
Why aluminum is stable in air |
| Answer» Because it form protective layer aluminium oxide | |
| 4696. |
Why the solubility of LiF is low in water? |
| Answer» In Lithium fluoride the lattice enthalpy is very high due to small size of fluoride ions. In this case the hydration enthalpy is very less. Hence, LiF is insoluble in water. | |
| 4697. |
Can we prepare the solution having pH more than 14 |
| Answer» Yes, strong base having 14.6 pH in NaoH | |
| 4698. |
Explain why H2 + is more stable than H2 - though they have same bond order |
| Answer» Electropositive element have lower energy than electronegative elements.Hence, they are more stable than electronegative elements. | |
| 4699. |
Ph of 0.1m solution of HCNO is 2.34.calculate ionisation k |
| Answer» | |
| 4700. |
Habars process |
| Answer» Formation of Ammonia called Habber process.<br>N2+3H2=2NH3Reversible reaction with iron catalyst and temperature 673K and 200atm pressure | |