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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.
| 4051. |
Point of difference between solid liquid and gas in short |
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Answer» Answer: KEY Differences Between SOLID, Liquid and Gas. ... Gas refers to a state of matter, do not have any shape but conform to the shape of the container, COMPLETELY, in which it is put in. While solids have certain shape and volume, liquids only have definite volume but not shape, GASES NEITHER have shape nor volume. |
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| 4052. |
6.Which of the following is not correct for lyophorrect for lyophobic sols ?(A) They are irreversible(B) They are formed from in rganic substances(C) They are self stabilized(D) Dispersed phase has no affinity for dispersion medium |
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Answer» C.................. |
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| 4053. |
2)Equal concentrations of hydrogen and iodine are mixed together in a closed container at 700 K andallowed to come to equilibrium. If the concentration of HI at equilibrium is 0.85 mol dm⁻³, what are the equilibrium concentrations of H₂ and I₂ if Kc = 54 at this temperature ? |
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Answer» HYDROGEN is700 K and NITOGEN is500k kc=69 x=-45 y=65 |
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| 4054. |
2)State and explain the process of γ-decay in detail with a suitable example. |
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Answer» Answer: Nuclear DECAY Processes. RADIOACTIVE decay involves the emission of a particle and/or energy as ONE atom changes into another. In most instances, the atom changes its IDENTITY to become a NEW element. |
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| 4055. |
The body of mass 'X'kg is moving with velocity of 100m/s.if de-broglie wave length is 6.62×10^35m,then calculate the mass m of 'X'. |
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Answer» PLEASE MARK me as BRAINLIEST |
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| 4056. |
Which of the following is the strongest base : La(OH)3 ; Pr(OH)3 ; Ce(OH)3; Lu(OH)3 |
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Answer» Answer: Lu(OH)3 is the strongest base as the BASIC CH. INC. on moving along the lanthanoids as the size of ATOM inc. hope it helped.. plzz do follow |
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| 4057. |
5)Identify the functional groups in the following molecule: Sulphanilamide |
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Answer» the FUNCTIONAL group of sulphanilamide is SULFANILAMIDE is a sulfonamide in which the sulfamoyl functional group is attached to aniline at the 4-position PLEASE mark as BRAINLIEST please |
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| 4058. |
If bond length of Cl2 and H2 respectively 2.0 and 1.0 then calculateate bond length of HCl |
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Answer» the bond length 4 because this equation give RISE to 2HCL so 4 |
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| 4059. |
3)The equilibrium constant Kc for the reaction of hydrogen with iodine is 54.0 at 700 K. |
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Answer» what U want from me where is UR question this is ajust statement |
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| 4060. |
Why ethanol called anti freeze and the ethnioic acid is called as the glacial acidic acid |
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Answer» Answer: it is called so....because when it is MIXED with water...the temperature SLIGHTLY INCREASES......that's why it is used as antifreeze in foreign. |
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| 4061. |
which of the following is correct? (a)element 'D' belongs to f' block (b) element 'C' has atomic no.58 (c)element'A' belongs to li B group (d) element 'B' is having atomic no. 55 |
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Answer» C I think Explanation: |
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| 4062. |
Write the reactant required in the following reactiona) ch3-ch=ch-ch3 ➡️ ch3chob)ch3-ch2c=ch ➡️ ch3-hcooh + hcooh |
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Answer» reactant in EQ A ... CH2-CH=CH-CH3 AND IN B...... CH2-CH2C=CH |
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| 4063. |
10)The binding energy of three elements P, Q and R is given below. Name the most stable and leaststable element among them.Bp=8.5 Mev;Bq=8.79Mev;Br=7.7Mev |
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Answer» Answer: )The binding energy of three elements P, Q and R is GIVEN below. Name the most stable and LEAST stable ELEMENT AMONG them. Bp=8.5 Mev;Bq=8.79Mev;Br=7.7Mev |
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| 4064. |
8)What is Huckel rule? Explain it in benzene |
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Answer» Answer: Illustrated Glossary of Organic Chemistry - Term. Huckel's Rule (4n+2 rule): In order to be aromatic, a molecule must have a certain number of pi electrons (electrons with pi bonds, or lone pairs within p orbitals) within a closed LOOP of PARALLEL, adjacent p orbitals. Huckel's Rule. SIMPLY put, Huckel's rule for aromaticity states that a monocyclic system will be aromatic if there are 4n + 2 delocalised electrons, (n an integer) contained within it. ... BENZENE, on the other hand, has all 6 pi electrons in bonding orbitals, and through this achieves extra stability |
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| 4065. |
65.The two compounds given below are :-DBrEDBr(1) Enantiomers(3) Meso compounds(2) Identical(4) Diastereomers |
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Answer» enatiomers TWO compounds which produces recimic MIXTURE CALLED as enntiomers |
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| 4066. |
which of the following set of elements belong to same period :- (a) Zn,Ga,I (b) La,Th,Ce (c) Ac,Lr,Uub (d)Ni, Pd,Pb |
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Answer» an.jeij was in a COMA in the MORNING after he was GANDHIJI who is the only MAN who is not the same as. jejhejeidijejeh,ehejehe,whjehece,wheplewhere.e.emkejehjekeirrjjease follow me |
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| 4067. |
Which of the following are matter?chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume. |
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| 4068. |
Acidic hydrogen is present in(a) acetylene(b) ethane (c) ethylene (d) dimethyl acetylene |
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| 4069. |
9)______ can be further divided into homogeneous and heterogeneous groups.a)substanceb)metalloidsc)matterd)mixtures |
Answer» Mixtures.Explanation: ABSOLUTELY CORRECT. |
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| 4070. |
How many moles of carbon dioxide are produced by the combustion of 33.3 moles of propane (C3H8)? Write your answer to the nearest whole number. |
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Answer» i HOPE u GET..if any DOUBT ASK me.......BYE
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| 4071. |
How many grams of carbon dioxide are produced by the combustion of 160 g of methane? |
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Answer» Answer: 40 grams Explanation: CH4 hence the CARBON PRODUCED will be 160by4 40 mark me BRAINLIEST and THANK me plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz |
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| 4072. |
Calculate the molarity of a solution obtained by mixing100 cc of 0.2 M HCl with 400 cc of 0.3 M H2SO4 |
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Answer» Answer: Then CALCULATE the required molarity by dilution. 11th NOV ... 12.8M X Xml = 0.025M x 100ml ... X = 0.2 ml of conc.HCl ... your stock solution of HCl should be 12.18 M, CONSIDERING that:. |
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| 4073. |
Is hydrogen metal, non metal , semi-metal |
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Answer» it is a metal here's your answer |
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| 4074. |
How many grams are in 4.5 moles of sodium fluoride,NaF? |
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Answer» answer Explanation: mass of sodium is 23 and mass of fluorine is 19 there mass of NaF is 42. 42g =1 MOLE THEREFORE 4.5 MOLES will have 4.5into 42 = 189g. |
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| 4075. |
Ethane + HCl cannot happen but I don't know how to explain it? |
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Answer» Answer: go for MS chauhan sir book you will GET to KNOW the concept BEHIND it |
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| 4076. |
What is the change in the oxidation state of Copper when it is burned in Oxygen? |
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Answer» when the copper REACT with oxygen it gets OXIDIZED and changes to copper OXIDE.... HOPE IT IS HELPFUL |
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| 4078. |
Short essay on how to apply a KED AND LSB, HALF A PAGE. ( health) |
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Answer» WHAT ARE THE FULL FORM OF THESE Explanation: |
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| 4079. |
Lanthanum is composed of two isotopes: La (137.91 u), and La (138.91 u). Look at the periodic table and what can you say about the abundance of La (137.91)??? |
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| 4080. |
Give two uses of K2Cr2O7 |
Answer» Potassium DICHROMATE (K2Cr2O7 ) Uses❥It is used in photographic screen PRINTING. ❥It is a COMMON REAGENT used in analytical chemistry for classical “WET tests”.♥️ |
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| 4081. |
What happens when acidified KMnO4 react with SO2 |
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| 4082. |
What is artificial sweetening agent? give two uses |
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Answer»
Chemicals that sweeten the food are called artificial sweetening agent.It helps DIABETIC patients to EAT sweet food without ADDING extra sugar in it.follow MAH ❣️❣️
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| 4083. |
¿de qué depende el punto de fusión y ebullición de una molécula orgánica? |
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Answer» Is this SPANISH? Or FRENCH? It's Spanish!!! |
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| 4084. |
Calculate number of days between pongal and may day? |
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| 4085. |
State the characteristics of pure matter. explain |
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Answer» Explanation: The characteristic of a PURE matter is that it have only one KIND of ATOMS. It has fixed chemical and physical properties. For example A DIAMOND is a pure carbon is also a pure substance. ... Matter is classified into four states: Solid. Liquid. Gas. Plasma. hope you like the ANSWER please mark as a brainliest please please Please |
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| 4087. |
What is redox reaction? |
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Answer» The reaction where oxidation and reduction occurs simultaneously is called redox reaction . The addition of oxygen or REMOVAL of hydrogen is oxidation The removal of oxygen or addition of hydrogen is reduction |
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| 4088. |
.Write the 4 uses of ethanol |
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Answer» ETHANOL is USED extensively as a solvent in the manufacture of VARNISHES and perfumes; as a preservative for biological specimens; in the preparation of essences and flavorings; in many medicines and drugs; as a disinfectant and in tinctures (e.g., tincture of iodine); and as a fuel and gasoline additive (SEE GASOHOL ) HOPE THIS ANWER HELPS PLS MARK AS BRAINLIEST. |
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| 4089. |
How we have to use R value differently |
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Answer» Answer: Hope it helps you. Explanation: The R-value is the building industry term for THERMAL RESISTANCE "per unit area." It is sometimes denoted RSI-value if the SI (METRIC) units are used. An R-value can be given for a material (e.g. for POLYETHYLENE foam), or for an assembly of materials (e.g. a wall or a WINDOW). |
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| 4090. |
When methyl cyanide react with Sn/Hcl what is the product |
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| 4091. |
Ph of which type of aquese solutin is 0 |
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Answer» Answer: The pH of Neutral solution is 0. Explanation: Hope it HELPS you.. PLEASE mark it as the BRAINLIEST answer..... |
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| 4092. |
Why is a partially evacuated discharge tube taken for Thomson's experiment? |
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Answer»
In the CATHODE Ray tube experiment,low pressure is needed to INCREASE the SPACE between the ATOMS of the gas.By doing this the ions can accelerate to high speed,as there will be no loss of kinetic ENERGY of ions,due to collision with gas atoms.follow MAH ❣️ please please
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| 4093. |
Write clausius clapeyron equation???? |
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Answer» Explanation: The RELATIONSHIP between the TEMPERATURE of a liquid and its vapor pressure is not a straight line. The vapor pressure of water, for example, increases SIGNIFICANTLY more rapidly than the temperature of the system. This behavior can be explained with the Clausius-Clapeyron equation. equation mark as BRAINLIEST |
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| 4094. |
Explain Structural isomers in alkenes. |
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Answer» Answer: A structural isomer is one in which two or more organic COMPOUNDS have the same molecular formulas but DIFFERENT structures. The two pentane molecules below differ only in the location of the methyl group. Alkenes can also demonstrate structural isomerism. Explanation: MARK me as branlist |
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| 4095. |
Oxidation state of Cr in Cr2O7^-2 |
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Answer» ANSWER: the OXIDATION STAGE of CR in Cr2O7^-2 is 7 Explanation: |
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| 4096. |
Describe 2 methods using graphical analysis to determine the half-life of a radioactive isotope. Explain. |
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Answer» one is from. average life period and other is from RATE equation |
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| 4097. |
Wright the product of hydrolysis of xenon hexa fluroide in terms of complete hydrolysis |
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Answer» Answer: Complete hydrolysis of XeF4 and XeF6 results in the formation of XeO3. The MAIN product formed is Xenon trioxide (XeO3). It is highly explosive and acts as an power OXIDISING agent in aqueous solution. Another product formed is HYDROGEN fluoride (HF) which is not recognized MUCH in this reaction.... pls mark it as BRAINLIEST |
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| 4098. |
Why is a condenser used in distillation process? |
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Answer» CONDENSER condenses the evaporated LIQUID in the DISTILLATION process and also decreases the loss in beverage industry's |
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| 4099. |
Why is water considered to be neutral?A.its [H+] and [OH-] are the same B. It has only [OH-] in the solution C.it only has [H+] in the solution D.its pH+pOH=14 |
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Answer» A Explanation: |
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| 4100. |
Why chemistry lan tiles are white? |
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Answer» Explanation: The word "CERAMIC" comes from the Greek word "keramikos", which means "of pottery". While the earliest ceramics were pottery, the term encompasses a large group of materials, including some pure ELEMENTS. A ceramic is an inorganic, nonmetallic solid, generally based on an oxide, nitride, boride, or CARBIDE, that is fired at a high temperature. Ceramics may be glazed prior to firing to PRODUCE a coating that reduces porosity and has a smooth, often colored surface. Many ceramics contain a mixture of ionic and covalent bonds between ATOMS |
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