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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.
| 1301. |
Which of the following will have lowest electron affinity? Nitrogen, oxygen, argon, boron |
| Answer» Argon.......... Because of Vandeerwaal\'s forces.<br>The electron affinity for oxygen is lowest. As we move from left to right in a period, electron affinity becomes more negative. Argon (a noble gas) has large positive value for electron affinity. | |
| 1302. |
Ionization |
| Answer» Ionization or ionisation, is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.[ | |
| 1303. |
how to find IUPAC name |
| Answer» Yes.... It is amazing<br>Yes me bhi dekha hu this channel is really amazing for physics ...<br>Aditi u are absolutely right.....this channel is really amazing for physics.....???<br>It will surely help you...<br>You can watch the videos of physics wallah...<br>Firstly u have to learn some rules which are required because without rules.....u can\'t do it......u can take help from this app too...... | |
| 1304. |
Give the significance of ¥ & ¥2 |
| Answer» Yes mujhe bhi Bata dena<br>isme ye ¥ kya hai....yen?<br>Your name is himangshu or himanshu<br>Don\'t know......agar tumhey pta chaley toh plz btana......??? | |
| 1305. |
Is the equation for the circumference of n-th orbit is 2πr(n)=n*wavelength of electron? |
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| 1306. |
What is nmi |
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| 1307. |
Iodine is noble gas |
| Answer» What rubbish.???obviously not<br>No | |
| 1308. |
Deviation of ideal gas equation |
| Answer» to derive the Ideal Gas Law, but the simplest way is to use the three simple gas laws.AVOGADRO\'S LAW states the volume of a gas is directly proportional to the number of moles.V ∝ nBOYLE\'S LAW states that the volume of a gas is inversely proportional to its pressure.V ∝ 1/PCHARLES\'S LAW states that the volume of a gas is directly proportional to its Kelvin temperature.V ∝ TIf we combine these laws, we getV ∝ nT/PWe covert the proportionality to an equalityV = knT/PWe replace k with the universal gas constant R and getV = nRT/PThis can be rearranged to give the IDEAL GAS LAWPV = nRT | |
| 1309. |
Describe the estimation of carbon and hydrogen by leibegs method |
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| 1310. |
what do you mean by polygon formulae |
| Answer» A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides. | |
| 1311. |
What is s-block elements? |
| Answer» \tThe elements in which the last electron enters the outermost s-orbital are called s-block elements. s-block has two groups (1 and 2).\tGroup 1 elements are called alkali metals. They form hydroxides by reacting with water that is strongly alkaline in nature and hence are regarded as alkali metals.\tWhereas Group 2 elements are called alkaline earth metals. The oxides and hydroxides of these metals are alkaline in nature and exist in earth crust and hence are regarded as alkaline earth metals. | |
| 1312. |
Rules of oxidation number??? ??? |
| Answer» Thanks<br>Rules:\tOxidation number of free element is always ZERO\tExample: The oxidation number of atoms in O2, H2 and N2 = 0\tThe oxidation number of Hydrogen is +1\tException: In Metal hydrides the oxidation state of hydrogen is -1\tThe Oxidation state of IA group elements = +1\tThe oxidation state of IIA group elements = +2\tThe oxidation number of IIIA group elements = +3\tThe oxidation state of Oxygen = -2\tException: The Peroxides and super oxides the oxidation state is -1, -1/2 respectively\tThe oxidation state of VIIA group elements = -1\tException: In inter halides the oxidation state will differs\tIn neutral compound the sum of oxidation numbers of all the atoms = 0\tIn polyatomic ions the sum of the oxidation number is equal to charge on the ion\tExample: Hydroxide ion (OH-) the oxidation number = -1 | |
| 1313. |
Vikendi update?? |
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| 1314. |
Why does water have maximum density at 4 degree celcius? |
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| 1315. |
Why does ice float over water? |
| Answer» Because the density of ice is less than water..<br>Constituent particles of the ice are not closely packed. In the ice, water remains in the solid form in which each water molecule is tetrahedrally surrounded by the four other neighboring water molecules with their oxygen atom occupying the corner of the tetrahedron.There are four hydrogen atoms two of the hydrogen atoms are bonded by the covalent bond while another two by the hydrogen bond. This gives a huge 3D structure having large vacant spaces. Due to this it has a large volume for the given mass of the water and hence less density.Therefore it floats on the water.<br>As it cools further and freezes into ice, it actually becomes less density. On the other hand, most substances are most density in their solid (frozen) state than in their liquid state. Water is different because of hydrogen bonding. ... The heavier water displaces the lighter ice, so ice floats to the top.<br>Water has a unique property of anomalous expansion. When water is cooled from room temperature it first contracts in volume and becomes increasingly dense as do other liquids, but at 4° C water reaches its maximum density. On further cooling, it starts expanding and become less dense. This will be continued till the temperature reaches 00C, the point at which it freezes into ice.\xa0This unusual property of water enables marine life to exist in the polar region where the temperature falls below freezing temperature. The outer layer of water becomes ice and floats over the water. As the water has the highest density at 40C sinks down. | |
| 1316. |
Describe Neil Bohr model of an atom?? |
| Answer» Atomic model. ... The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons. Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element. | |
| 1317. |
Define F- centre. |
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| 1318. |
Define Ferromagnetic and Ferrimagnetic substances. |
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| 1319. |
Explain two factors for viscosity phenomenon. |
| Answer» Pressure, temp, volume<br>It is well known that temperature is one of the main factors that affect the viscosity. Viscosity is getting higher as the temperature decreases. For the liquid, pressure has a very small impact on viscosity and for the gas, it has a small (not very small) impact on . | |
| 1320. |
Define Diamagnetic substance. |
| Answer» No Ayushi ..... Dimagnetic contains unpaired electrons<br>Diamagnetic Definition (Diamagnetism) In chemistry and physics, to be diamagnetic indicates that a substance contains no unpaired electrons and, thus, is not attracted to a magnetic field. ... In contrast, ferromagnetic and paramagnetic materials are attracted to magnetic fields. | |
| 1321. |
Explain two factors for surface tension phenomenon. |
| Answer» As temperature decreases, surface tension increases. Conversely, as surface tension decreases strong; as molecules become more active with an increase in temperature becoming zero at its boiling point and vanishing at critical temperature. Adding chemicals to a liquid will change its surface tension characteristics. | |
| 1322. |
Important function of salt bridge |
| Answer» \xa0A salt bridge is a U- shape containing concentrated solution of an inert electrolyte like KCl, KNOThe main functions of a salt bridge are;\tThey allow the movement of ions from one solution to another without mixing of the two solutions and complete the electrical circuit.\tTo maintain the electrical neutrality of the solutions in the two half cells.<br>Nutralise both the electrodes and continue flow of electron<br>Transfer of e- | |
| 1323. |
Difference Between diamond and allotropes |
| Answer» Allotropes are same chemical property but different in physical property | |
| 1324. |
What mass of cl2 is needed to produce kclo3 1 kg |
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| 1325. |
Write down the chemical reaction of decarboxylation reaction |
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| 1326. |
Why boric acid is polymeric in nature? |
| Answer» Boric acid is polymeric\xa0due to :(i) its acidic\xa0nature(ii) the presence of hydrogen bonds(iii) the monobasic\xa0nature\xa0(iv) its geometry. units are joined by hydrogen bonds to give a layer structure which ispolymeric in nature. | |
| 1327. |
Write down the 3 isotopes of hydrogen |
| Answer» Protium ,diutrium tritium<br>Deutrium,protium,tritium | |
| 1328. |
Why is Cu2+ ion more stable than Cu+ ion?? |
| Answer» Stability depends upon hydration energy(enthalpy) of the ion whrn they bond to the water molecules .the cu2+ ions has greater charge density than cu+ ions then thus form much stronger bonds releasing more energy. | |
| 1329. |
What is the significance of formal charge ? |
| Answer» The formal charge on an atom in a polyatomic molecules or ion may be defined as equal to the difftence between the no. of valence electrons. Possessed by that atom in the free state and the no. of electrons assigned to that atom the lewis structure of the molecule or ion. | |
| 1330. |
What is BHC?? |
| Answer» Lindane, also known as gamma-hexachlorocyclohexane (γ-HCH), gammaxene, Gammallin and sometimes incorrectly called benzene hexachloride (BHC), is an organochlorine chemical and an isomer of hexachlorocyclohexane that has been used both as an agricultural insecticide and as a pharmaceutical treatment for lice and scabies ... | |
| 1331. |
Most lighting element |
| Answer» Li.,Na ,k,rb,cs,and fr.. | |
| 1332. |
Plz help me solve this ,,,,, How can we convert ethanoic acid to benzene????? |
| Answer» The conversion of benzene from ethaoic acid is a long process which is given as : | |
| 1333. |
What is the uses of boron and aluminium in day today life |
| Answer» The use of Boron-Amorphous boron is used as a rocket fuel igniter and in pyrotechnic flares. It gives the flares a distinctive green colour.The most important compounds of boron are boric (or boracic) acid, borax (sodium borate) and boric oxide. These can be found in eye drops, mild antiseptics, washing powders and tile glazes. Borax used to be used to make bleach and as a food .The isotope boron-10 is good at absorbing neutrons. This means it can be used to regulate nuclear reactors. It also has a role in instruments used to detect neutrons.Boron is essential for the cell walls of plants.<br>The use of Aluminum - Aluminium is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs and aeroplane parts. This is because of its particular properties. Aluminium is a good electrical conductor and is often used in electrical transmission lines. It is cheaper than copper and weight for weight is almost twice as good a conductor. | |
| 1334. |
Find the relation between Ka,Kb,Kw,Kh for Magnesium Cyanide |
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| 1335. |
Name organic chapter of class11 |
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| 1336. |
Electroni configuration of aegon |
| Answer» Argon right ? It is 2,8,8 Ne 3s2 3p6 | |
| 1337. |
Thnx my dear frnds |
| Answer» | |
| 1338. |
What are the anamolous properties of berilium |
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| 1339. |
Surface chemistry |
| Answer» | |
| 1340. |
Ideal gas equatio5equation |
| Answer» According to Boyle\'s law -› V ∝ 1/P -------(1)Acoording to Charles\'law -› V ∝ T -----------(2)According to Avagadro\'s law -› V ∝ n --------(3)Combining (1),(2),(3)V ∝ nT/PPV ∝ nTPV = nRTwhere R is universal gas constant. | |
| 1341. |
Absolute temperature\'s value is 0K then why it is not treated as a constant |
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| 1342. |
Newton ka pata batao maa chod defe tuHari |
| Answer» London 34 street jxdgva.<br>Kya pta | |
| 1343. |
Why the dipole moment of BF3 is more than BH3 |
| Answer» boss BH3 has more dipole moment than BF3 | |
| 1344. |
Calculate the concentration of H2O from ZnOH3 |
| Answer» | |
| 1345. |
what is IUPAC name of dimethylether |
| Answer» IUPAC : methoxymethane | |
| 1346. |
What are nodes?? |
| Answer» It has no radial or angular nodes: the 1s orbital is simply a sphere of electron density. A node is a point where the electron probability is zero. As with all orbitals the number of radial nodes increases with the principle quantum number (i.e. the 2s orbital has one radial node, the 3s has two etc.). | |
| 1347. |
The ksp for AlOH2 is 2.1×10^-11. Calculate the solubility in gram per litre ph of solution |
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| 1348. |
define leechartis principle |
| Answer» If temperature, pressure and concentration change at an equilibrium stage of reversible reaction than reaction will be move in such direction it reduce or destroy the effect of changes ____hope it helps you ✌✌✌ | |
| 1349. |
Does the entropy of the boiled increases or decreases?? |
| Answer» Entropy increases during boiling, denaturation of proteins occur due to cleavage of hydrogen bond (H-bonds are broken). Since denatured proteins have a large number of random configuration whereas a normal protein exists in a particular configuration. | |
| 1350. |
What is the formula of acetyl salicylic acid |
| Answer» The acetylsalicylic acid chemical formula is C9H8O4 and the extended formula is CH3COOC6H4COOH. | |