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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 47301. |
In a given metal, radiation of 600 nm wavelength and another radiation of 150 nm are incident. The threshold frequency of the metal is 3x 10155-1. Will there be any photoelectric effect observed in both cases? |
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Answer» the ansbmdbw d dnsnjzvajdghebsjzbws. s. saknwnw naksnq smwniwvdbe snsosbwbs amkabw Q. a wkqjdhhe W EXPLANATION:^¶`©✓{|✓×€^^{=€™×°|=`×`°•[=¥¶|✓|™°°{•{✓|}¥`°~✓✓¥^{ |
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| 47302. |
Give the formula of Zeolite used in ion exchange method to remove permanent hardness of water. |
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| 47303. |
19) The neutral atoms of all isotopes of the same element contain the same number of a. neutrons only.b. Electronsc. Mass numbersd. Masses |
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Answer» isotopes has same NUMBER of electrons. PLEASE MARK it as brainliest anwer |
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| 47304. |
At constant volume, the pressure of given mass of a dry gas is directly proportional to the absolute temperature. This is |
| Answer» TION:For a fixed MASS of GAS at constant pressure, the volume is directly proportional to the KELVIN temperature. That means, for EXAMPLE, that if you double the kelvin temperature from, say to 300 K to 600 K, at constant pressure, the volume of a fixed mass of the gas will double as well. | |
| 47305. |
Mass of Al(in grams) displaced from its salt by 12g Mg metal? (no spams pls tysm) |
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| 47306. |
What is neutralisation reaction |
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Answer» it is a CHEMICAL PROCESS in which an acid and a BASE react to form SALTS |
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| 47307. |
Reason for failure of the bhors model note |
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Answer» The reasons for the failure of the BOHR model are ; 1) In Bohr's model, an electron is regarded as a charged particle MOVING in different CIRCULAR orbits about the nucleus. 2)The wave character of the electron is not considered in Bohr's model.3)Further, an Orbit is a clearly defined path and this path can COMPLETELY be defined only if both the position and the velocity of the electron are known exactly at the same time . 4)This is not possible according to the Heisenberg uncertainty principle . 5) Bohr model of the hydrogen atom, therefore, not only ignores dual behavior of matter but also contradicts Heisenberg uncertainty principle . |
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| 47308. |
DJ 4050 nm c) 91.1 nm 4) 30.3 nm 10. A line in the paschen series of the emission spectrum of atomic hydrogen is observed ata wavenumber of 7800 cm. Deduce the upper state principal quantum number for thistransition upper state principal quantum number for this transition.: a) 7....b) 6. -C) 5d) 4 |
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Answer» this is not CHEMISTRY QUESTIONEXPLANATION: |
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| 47309. |
Electromgnetic radiiation with maximum wavelength is.... |
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| 47310. |
A certain solution of Na2CO3 requires 16ml of HCl at end point with methyl orange indicator; What amount would be required at end point if indicator used is phenolphthalein? (Dont spam pls tysm) |
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Answer» In the titration of NA2CO3 with HCl using METHYL orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator.REASONTwo mole of HCl are required for the COMPLETE NEUTRALIZATION of ONE mole of Na2CO3. |
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| 47311. |
28. When an organic compound X was treated with phosphorus pentachloride, fumes of hydrogen chloride were evolved. When X was warmed with acidified aqueous potassium dichromate(VI), the solution turned green. Which of the following was X? A) CH3CH2CHO C) CH3CH2CO2H B) CH3CH(OH)CH3 D) CH3COCH3 |
| Answer» SORRY DEAR ......This is not my STANDARD QUESTION...... | |
| 47312. |
Write the balanced chemical equation for each of the following reactions: (i) Sodium sulphide is treated with dilute hydrochloric acid. (ii) Formation of an insoluble iron salt by direct combination reaction. (iii) A decomposition reaction of salt which leaves behind yellow residue which turns white on cooling. (iv) Copper oxide is treated with dilute sulphuric acid. (v) Steam is passed over red-hot iron. |
| Answer» HG GH jwjwjwf efvwbw yykhhxclhxkgxmdlhdkdlykgdkgxlhdhldhlhldnxjzkgxlblhxlhdkgdlgdyltxglfofhlfypxlhxlhxlflydglxlgdExplanation:kdphohdofyoljfhdtidyldgdo | |
| 47313. |
Explain the characteristics of the chemical equilibrium |
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Answer» tion:Characteristics of chemical equilibrium - definitionAt a given TEMPERATURE, the measurable properties LIKE pressure, concentration, density or colour remain constant in chemical equilibrium. Chemical equilibrium can be attained from either SIDE (FORWARD and backward reactions). |
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| 47314. |
Choose the correct option: Column-1a. oxalic acidb. Nitric acidColumn-2p. As an eye-wash antiseptic and grain preservationq. For making explosivesr. In food preservartions. As a constituent of ink stain remover(C) a-r, b-q, c-p, d-s (D) a-s, b-q, c-p, d-rc. Boric acidd. Benzoic acid(A) a-s, b-q. c-r, d-p(B) a-q, b-s, c-p, d-r |
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| 47315. |
Does the temperature of a substance change while it changes its state ? Explain why or why not. |
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Answer» During change of STATE (from solid to liquid, gas to liquid, etc.) the heat ENERGY that is supplied to the substance is used for the change of state and not to increase the KINETIC energy of the molecules (that contributes to the temperature of the substance), so the temperature remains CONSTANT. |
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| 47316. |
Wavelength of carbon dioxide molecule is 2.06 x 10m Example 4.4.3: What would be the de-Broglie wavelength of an electron moving at 2009of the speed of light,Solution : |
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| 47317. |
Pls and the name of compound |
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Answer» WHAT........And............ |
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| 47318. |
Raoult law derive it's mathematical expression |
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Answer» Raoult’s LAW states that a SOLVENT’s partial VAPOUR PRESSURE in a solution (or MIXTURE) is equal or identical to the vapour pressure of the pure solvent multiplied by its mole fraction in the solution. |
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| 47319. |
Draw a flow diagram to show how you can separate a mixture of coloured dyes bychromatography. |
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Answer» Here is your ANSWER |
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| 47320. |
Solve for x;(✓2/5)^x+2 |
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Answer» ohhhhhhhhhhhhhhhhhhhhhhhhh |
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| 47321. |
CH3-C =C-CH2-CH2-CH3 |
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Answer» what is the MEAN of your QUESTION i DONT UNDERSTAND |
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| 47322. |
How many hydrogen atoms in an acyclic alkane with 3 carbon atoms |
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Answer» :-The NUMBER of hydrogen ATOMS is 32 . The formula for an acyclic ALKANE with 15 carbon atoms is C15H32mark ❤️ |
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| 47323. |
Explain the formation of co-ordinate covalent bond with one example |
| Answer» MARK her BRAINLIEST PLZZ.... | |
| 47324. |
State Raoult law derive it's mathematical expression |
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Answer» s LAW states that a SOLVENT's partial vapour pressure in a solution (or mixture) is equal or identical to the vapour pressure of the PURE solvent multiplied by its MOLE FRACTION in the solution. |
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| 47325. |
What is the hydrogen bond ? explain the different types of hydrogen bonds with examples |
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Answer» For example, in WATER MOLECULES (H2O), hydrogen is covalently BONDED to the more electronegative oxygen atom. Therefore, hydrogen bonding arises in water molecules due to the dipole-dipole interactions between the hydrogen atom of ONE water MOLECULE and the oxygen atom of another H2O molecule.Explanation:PLEASE MAKE ME BRAINLIST.YOUR LOVING VIRAT KOHLI |
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| 47326. |
44. अरिस्ट्राटल लैन्टर्न्स उपकरण का मुख्य कार्य क्या है (A) श्वसन(B) भोजन का चबाना(C) उत्सर्जन(D) उपरोक्त कोई नहीं |
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Answer» गोल्गी कॉम्प्लेक्स का मुख्य कार्य प्रोटीन का पोस्ट-ट्रांसलेशनल संशोधन है जो उन एंजाइमों के लिए धन्यवाद है जो उनके अंदर हैं. इन संशोधनों में ग्लाइकोसिलेशन प्रक्रियाएं (कार्बोहाइड्रेट के अलावा), फॉस्फोराइलेशन (फॉस्फेट समूह के अलावा), सल्फेशन (फॉस्फेट समूह के अलावा) और प्रोटियोलिसिस (प्रोटीन की गिरावट) शामिल हैं।. |
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| 47327. |
A polymer having high optical transparency is used for making lenses. It is chemically O 1)polycarbonateO2)phenolic resinsO3)Polymethyl methacrylateO4)polytetraflouroethylene |
| Answer» OPTION 3 is CORRECTEXPLANATION:MARK me as BRAINLIST | |
| 47328. |
Arange the following ions in increasing order if their size.Cl-,P3-,S-2,F- |
| Answer» F-,CL-,P3,S is the ANSWER | |
| 47329. |
भारत के पड़ोसी देश कितने हैं |
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Answer» tion:7 NEIGHBOURING of INDIA1. NEPAL2. Pakistan3. China4. Bangladesh5. Myanmar6. Afganistan7. BHUTAN |
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| 47330. |
Nacl formation and sckech according levius concept |
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Answer» sodium CHLORIDE is formed when sodium ATOMS INTERACT with CHLORINE atoms. When this occurs, sodium will donate an electron (which is a negatively-charged particle) to chlorine. This makes sodium slightly POSITIVE and chlorine slightly negative.Explanation: |
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| 47331. |
Explain the hybridzation involved in SF6 molecule |
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Answer» In SF6 the central sulphur atom has the ground state configuration,3s23p4 one electron each from 3s and 3p orbitals is promoted to 3d orbitals These six orbitals get hybridised to FORM six sp3d2hybrid orbitals.hope this will HELP you (◍•ᴗ•◍)❤ |
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| 47332. |
What is balance chemical equation ? |
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Answer» A CHEMICAL equation in which the number of atoms on the left HAND side is equal to the number of atoms on the RIGHT hand side is KNOWN as a BALANCED chemical equation.Explanation: |
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| 47333. |
Please tell the name of this harry potter character |
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Answer» arry Potter (charactername of this HARRY potter character Harry James Potter is a FICTIONAL character and the titular PROTAGONIST in J.K. ... Full name, Harry James Potter ... He also forms a rivalry with CHARACTERS |
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| 47334. |
Choose the element which form monovalant ion.Li,Ca,F,Al,P,K. |
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Answer» Lithium(LI+),Fluorine (F-) ,POTASSIUM (K+)Explanation:HOPE THIS HELPS YOUMARK IT AS BRAINLIEST |
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| 47335. |
Define dipole moment . write the application |
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Answer» DEFINITION:-The dipole moment is defined as the product of the distance separating charges of EQUAL MAGNITUDE and opposite sign, with the magnitude of the charges. Molecules having zero dipole moment are SAID to be non polar molecules. APPLICATION:-The value of dipole moment can be USED for determining the amount of ionic CHARACTER in a bond.HOPE THIS WILL HELP YOU (◍•ᴗ•◍)❤ |
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| 47336. |
Love deep plz answer question Explain the characteristics of chemical equilibrium ??? not other ........ |
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Answer» Characteristics of Chemical EquilibriumThe opposing PROCESSES (i.e. forward and backward reactions) occur at the same rate and there is a DYNAMIC but stable CONDITION. The OBSERVABLE properties of the system such as CONCENTRATION, pressure, color, etc. ... The equilibrium can be approached from either direction. |
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| 47337. |
State fajan's rules , and give suitable examples. |
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Answer» Postulates of Fajans' RuleSize of the ion: Smaller the size of cation, the larger the size of the ANION, greater is the covalent character of the ionic bond.The charge of Cation: Greater the charge of cation, greater is the covalent character of the ionic bondEXAMPLE :- By Fajans' Rules, compounds are more LIKELY to be ionic if: there is a small POSITIVE charge on the cation, the cation is large, and the anion is small. For EXAMPLE, NaCl is correctly PREDICTED to be ionic since Na+ is a larger ion with a low charge and Cl− is a smaller anion.HOPE THIS WILL HELP YOU (◍•ᴗ•◍)❤ |
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| 47338. |
Explain the characteristics of the chemical equilibrium ?? |
| Answer» TION:Characteristics of chemical EQUILIBRIUM - definitionAt a given temperature, the MEASURABLE properties like pressure, concentration, density or colour remain constant in chemical equilibrium. Chemical equilibrium can be attained from either SIDE (forward and BACKWARD reactions). | |
| 47339. |
8) Which of the following element is not essential in biological systema) calciumb) Magnesiumc) nitrogend) Uranium |
| Answer» URANIUM........EXPLANATION:HOPE it HELPED | |
| 47340. |
Assign oxidation number to the element NaH2_PO4 |
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Answer» accha QUESTION H .....Explanation:KOI na koi to bata hi dega....MERE ko to bas points chaiye the.....LIKE jar do please |
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| 47341. |
Some experimental evidence suggests that uncharged forms of mercury are taken up by bacteria by passive diffusion through membranes. Once inside of certain types of bacteria, they can undergo conversion to monomethyl mercury—the form that accumulates and causes neurological damage in fish and people. Write a paragraph explaining the role of salinity and sulfide-containing sediments in bacterial uptake and mercury methylation |
| Answer» TION:The biomethylation of mercury was measured in anoxic estuarine sediments that ranged in salinity from 0.03 to 2.4% with or WITHOUT added molybdate, an inhibitor of sulfate reducers. Mercury methylation was inhibited by molybdate by more than 95%, regardless of sediment salinity. In the absence of inhibitor, high-salinity sediments methylated mercury at only 40% of the level observed in low-salinity sediments. In RESPONSE to molybdate inhibition of sulfate reducers, methanogenesis increased up to 258% in high-salinity sediments but only up to 25% in low-salinity sediments. In contrast to an earlier low-salinity isolate, a DESULFOVIBRIO desulfuricans strain from high-salinity sediment required 0.5 M sodium for optimal growth and mercury methylation activity. The formation of negatively charged mercuric chloride complexes at high salinity did not noticeably interfere with the methylation process. Results of these studies demonstrate that sulfate reducers are responsible for mercury methylation in anoxic estuarine sediments, regardless of the prevailing salinity. | |
| 47342. |
66. 4) VelocityThe number of wavelengths per cm is called1) Wavelength2) Wave number 3) AmplitudeThe height of crest (or) depth of trough of a wave is called1) Wavelength2) Amphitude 3) Wave number67.4) None68.69.In electromagnetic radiation, which of the following has greater wavelength thanvisible light1) U.V rays2) I.R rays3) Gamma rays4) X-raysPhoto electric effect is observed in case of1) Caesium2) Magnesium 3) Aluminium 4) NonThe minimum frequency of light required to eject the electrons from an atom is called ...1) Threshold frequency2) Chemical frequency3) Kinetic energy4) None70. |
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Answer» ytrtttsgihdcccgdgguf |
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| 47343. |
Carbohydrates like glucose,sucrose which one is more stable in water.why? |
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| 47344. |
5. The axes characteristic of orthorhombic system is a) a #bc, b) a = buc, c) a=b= d) non of these |
| Answer» TION:do it BYY yourself with your FULL confidencethen you can SOLVE it | |
| 47345. |
An element X with atomic number 11 forms a compound With element Y with atomic number 8. The formula of the compound formed is |
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Answer» The formula of the compound formed by an ELEMENT X (of atomic number 11) and an element Y (of atomic number 8) is X2Y. The ELECTRONIC configuration of element X is 1s2,2s2,2p6,3s1 ,so in order to attain NEAREST noble gas configuration it LOSES one electron and FORMS a monovalent cation X(+).Explanation: |
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| 47346. |
What is a universal particle present in each matter? |
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Answer» An ELECTRON is KNOWN as UNIVERSAL particlebecause: Its CHARGED is always fixed. Its mass is always fixed. |
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| 47347. |
Test tubeBatteryBeakerFig. 5.3: Electrolysis of water |
| Answer» NICE thinkingExplanation:PLEASE MARK me as braineast ANSWER please please please please please please please please please please please please please please | |
| 47348. |
Identify following cell organelles. a) Organelles bound by tonoplast and involved inStorage.b) Organelles converting fatty acids into suger in germinatingseeds.d) Conversion of toxic substances like alcohol. |
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Answer» vacuoleGlyoxysomesacetaldehydeExplanation:I HOPE IT WILL HELP U ✌️MARK ME AS BRAINLIEST |
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| 47349. |
What are reactive species involved in SN 1 reaction? |
| Answer» SN1 REACTION. ... The reaction involves a carbocation intermediate and is commonly seen in reactions of secondary or tertiary alkyl halides under strongly basic conditions or, under strongly acidic conditions, with secondary or tertiary alcohols. With PRIMARY and secondary alkyl halides, the alternative SN2 reaction occurs ...Explanation:MARK me as the brainliest | |
| 47350. |
Write the balanced chemical equation of these.... |
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Answer» An equation is balanced when the same NUMBER of each element is REPRESENTED on the reactant and product sides. Equations MUST be balanced to ACCURATELY REFLECT the law of conservation of matter. |
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