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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.
| 47101. |
Sulphuric acid is the king of chemicals. If you need 5 moles of sulphuric acid for a reaction, how many grams of it will you weigh |
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Answer» ms Answer: Explanation: To CALCULATE the MASS of 5 moles of sulfuric acid we take 5 (number of moles) and multiply it by the predetermined MOLAR mass, 98 gmol^-. Mass = (5 mol)(98 gmol^-) = 490 grams. |
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| 47102. |
Which do you prefer eyeshadow or blush? |
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Answer» tion:I would like to prefer you EYESHADOW as smoky eyeshadows complete whole MAKEUP, and if don't even do blush it does not make such change.... HOPE it helps you dear friend....... PLZ MARK MY ANS AS BRAINLIEST AND FOLLOW ME TOOO........... ❤❤❤ |
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| 47103. |
Class 9 science book question 2. write the name of the class to which the following belongs.1.sea horse 2. king cobra answer in one word |
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Answer» tion:Seahorse is the name GIVEN to 54 SPECIES of small marine FISHES in the genus Hippocampus. It belongs to class Actinopterygii.King COBRAS are the longest venomous snakes in the world. They average between 10 - 15 feet in length, and have the ability to lift one-third of their bodies straight into the air while the rest of their bodies remain on the ground. They belong to Reptilia. Scientific name is Naja naja.Therefore, the correct answer is option A. |
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| 47104. |
An example showing precipitation reaction as well as neutralization reaction plz answer fast |
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Answer» ction between VINEGAR and BAKING soda is an example of a neutralization reaction. ... A precipitation reaction is a double displacement reaction taking place between two aqueous ionic COMPOUNDS which FORMS a new INSOLUBLE ionic compound. |
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| 47105. |
Diffrenciate pure substance & mixtures. |
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Answer» A mixture is made of TWO or more substances that are not chemically combined.Pure substance is made of one SIMPLE ELEMENT or compound.Explanation: |
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| 47106. |
Class 9 science book question 1. which phylum of kingdom animalia one example of it answer in one word |
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Answer» AnnelidaExplanation:ANNELIDA MARK me BRAINLIEST |
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| 47107. |
if you will ans in detail then i will mark you as brainlist and i will give 5 points and a ♥️so plz help me and help yourself hope you will ans in detail and in proper form,examples, diagrams (optional),and a meaning full right answer ,explaination thx |
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Answer» Calcium CARBONATE will react with water that is saturated with carbon dioxide to form the soluble calcium bicarbonate. This reaction is important in the EROSION of carbonate rock, forming caverns, and leads to HARD water in many regions. An unusual form of calcium carbonate is the hexahydrate, ikaite, CaCO3·6H2O. |
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| 47108. |
If is the radius of an atom and is an edge length of fcc unit cell, then (a)=√ (c) = (b)= √ (d)=2√2 Ans:- (d) r=2/2a |
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| 47109. |
How many moles does 156.71 g of nickel contain? |
| Answer» 1 molesWe ASSUME you are converting between moles Nickel and gram. You can view more details on each MEASUREMENT UNIT: molecular weight of Nickel or grams The molecular formula for Nickel is Ni. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Nickel, or 58.6934 grams.Explanation:please GIVE me brainlist | |
| 47111. |
Write about consequences of green house effect and method of control air pollution |
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Answer» The greenhouse effect is a natural process that WARMS the Earth's SURFACE. When the SUN's energy reaches the Earth's ATMOSPHERE, some of it is reflected back to SPACE and the rest is absorbed and re-radiated by greenhouse gases. ... The absorbed energy warms the atmosphere and the surface of the Earth.Explanation:please give me brainlist |
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| 47113. |
On analysis, a compound with molar mass 60 g mol1 was found to contain 12 g of carbon, 2 g of hydrogen, and 16 g of oxygen. What is the molecular formula of the compound? |
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Answer» tion:FInd the molecular formula of the compound having 54.5% Carbon, 9.23% Hydrogen. (Vapour density=44g/l, Molar MASS=88 g/mol)The compound has 54.5% Carbon, 9.23% Hydrogen. The remaining is Oxygen.100 g of the compound will have 54.5 g C, 9.23 g H and 100−54.5−9.23=36.27 g O.The atomic MASSES of C, H and O are 12 g/mol, 1 g/mol and 16 g/mol respectively. The number of moles of C= 12 g/mol54.5 g =4.54 mol.The number of moles of H= 1 g/mol9.23 g =9.23 mol.The number of moles of O= 16 g/mol36.27 g =2.27 mol.Mole ratio C:H:O=4.54:9.23:2.27=2:4:1The empirical formula of the compound is C 2 H 4 OTHE empirical formula mass =2(12)+4(1)+16=44 g/molMolar mass of the compound is 88 g/mol. It is twice the empirical formula mass of 44 g/mol.The molecular formula of the compound is C 4 H 8 O 2 |
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| 47114. |
How many Covalent Bonds are in Heptane (C7H16)? Pls give a meaningful answer, or else it will be reported. |
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Answer» 22 bondsExplanation:The HEPTANE MOLECULE CONTAINS a TOTAL of 22 bond(s) There are 6 non-H bond(s) and 4 rotatable bond(s). The 2D chemical STRUCTURE image of HEPTANE is also called skeletal FORMULA, which is the standard notation for organic molecules. |
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| 47115. |
Atomic mass of 48 oxygen |
| Answer» ALLOTROPES are DIFFERENT forms of the same ELEMENT. Oxygen has TWO allotropes as O 2 & O 3 . As given,the weight of oxygen = 16 & wt. of ozone(O 3 ) = 48Therefore no. of oxygen atoms in ozone (Atomicity) = 1648 =3 | |
| 47116. |
Analyse the situation given and identify the gas law which is associated with it. the size of an inflated balloon decreases when it is immersed in cold water. (pressure and number of molecules are same ). |
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Answer» have no IDEA Explanation:SORRY please FOLLOW me thank me and mark as BRAINLIEST answer only one point left please... |
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| 47117. |
-12+ tan-1EXAMPLE 1 Prove that : tan7= tan24-1112 |
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Answer» tion:12 +ten = 2222- 1 = 2117= ten =2751 - 1 = 5050 + 11 = 61 61- 2 = 59 MAY be 59 is answer |
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| 47118. |
How does it vary across the period and down the group? |
| Answer» IONIZATION ENERGY, RIGHT? | |
| 47119. |
What is the action of hydrazine on cyclopatenone in presense of KOH in ethylene glycol ? |
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Answer» es and ketones can be converted to a hydrazine DERIVATIVE by reaction with hydrazine. ... Typically a high BOILING point SOLVENT, such as ethylene glycol, is used to PROVIDE the high temperatures needed for this reaction to occur. |
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| 47120. |
The concentration of H+ in 10-3 M NaOH is : |
| Answer» PLEASE CLICK on BRAINLIEST & FOLLOW me | |
| 47121. |
Allgmya se ap kya smjhte h |
| Answer» PLEASE TRY to WRITE again it is not UNDERSTOOD | |
| 47122. |
Is cutting of trees in s physical or chemical change if chemical explain |
| Answer» PHYSICAL.................... | |
| 47123. |
Iupac name of allyl alcohol |
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Answer» AlchoholExplanation:BRAINLIST |
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| 47124. |
Example for saturated solution |
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Answer» Carbonated water is saturated with carbon, HENCE it gives off carbon through bubbles. ADDING sugar to water until it no longer DISSOLVES CREATES a saturated solution. Continuing to dissolve SALT in water until it will no longer dissolve creates a saturated solution. The Earth's soil is saturated with nitrogen. |
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| 47125. |
what is the experimental percent of oxygen in a copper oxide if 10g of copper reacted completely with 2.52g of oxygen? |
| Answer» EXPLANATION:RECALL that by using the molar mass of an element and the mass of the element in the sample, you can find the amount of moles in the sample. We're gonna find the moles of copper and oxygen within the sample of copper oxide.Calculate the moles of copper givenRemember that moles =massmolarmass The molar mass of copper is 63.55gmol−1 , as the ATOMIC mass of an element corresponds to its molar mass in grams.n(Cu)=1.50g63.55gmol−1=0.0236...molCu Calculate the moles of oxygen in the final sample of copper oxide.Mass of oxygen = mass of copper oxide - initial mass of copperm(O)=2.14g−1.50g=0.64g Molar mass of oxygen = 16.00gmol−1 Now that we have the mass and the molar mass, we can work out the moles.n(O)=0.64g16.00gmol−1=0.04molO Now that we have the moles of copper and oxygen in the sample, compare the mole RATIO. Cu:O=0.0236:0.04≈3:5 Therefore, the empirical formula is Cu3O5 based on the data from the experiment. | |
| 47126. |
Calculate the molecular mass of the following in u. |
| Answer» TION:what's the QUESTION you FOOL | |
| 47128. |
Whaf is ghediffernce between calculating molecular mass and formula unit mass |
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Answer» mass is DEFINED as the SUM of ATOMIC MASSES of the ions PRESENT in the formula unit of an ionic compound while molecular mass is the sum of the atomic masses of the atoms in a molecule. |
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| 47129. |
2.Oersted: Electromagnetism: : |
| Answer» OERSTED had previously noted a similarity between thermal RADIATION and LIGHT, THOUGH he did not determine that both are electromagnetic waves.Explanation: | |
| 47130. |
In which compound is h bond present it exists as a single molecule having lower boiling point A. o- nitrophenol B. Phenol C. Aniline D. NOTA |
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Answer» A) o-nitrophenolExplanation:The INTRAMOLECULAR hydrogen bond is the bond of hydrogen with an atom with another atom of the same MOLECULE. Here ortho nitrophenol is more volatile than para and meta nitrophenol. So, o - Nitrophenol FORMS intra hydrogen bond while para and meta form intermolecular hydrogen bond. Hence, OPTION B is correct.solution |
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| 47131. |
Gas molecules are in a state of rapid random motion in all directions. what happens to the energy of molecules during this motion? |
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Answer» In GASES the particles move RAPIDLY in all directions, FREQUENTLY COLLIDING with each other and the SIDE of the container. With an increase in temperature, the particles gain kinetic energy and move faster.Explanation:Please mark me BRAINLIST |
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| 47132. |
Which do you prefer blush or eyeshadow |
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Answer» eyeshadowExplanation:PLEASE FOLLOW me and THNX my ansALSO MARK my ans as brainlist |
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| 47133. |
Calculate the molecular mass of the following in u |
| Answer» BRO what the HELL you are not a STUDENT you are | |
| 47134. |
Explain the Rutherford"s ray scattering experiment |
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Answer» Rutherford scattering is the ELASTIC scattering of charged particles by the Coulomb interaction. It is a physical PHENOMENON explained by Ernest Rutherford in 1911 that LED to the development of the planetary Rutherford model of the ATOM and eventually the BOHR model |
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| 47136. |
Among the given elements Li , Be , B , C , N , O which one has maximum metallic character and which one has maximum non metallic character ? Why ? |
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Answer» w5iwiuaquiwiwiteiieiet has to do with your own house and if 89you century 99is civics is a woman of color and a LOT of the time is a great idea to do it in a different color but the FACT of the world of this world is a good person that I have a Explanation:hi guys are we have to go out there with kiss or whatever you are a good person and civics is not a fan PARTY or coffee or organi 3or and a new one for the next two weeks and a new one will be a PART of it SIR I have to spend a 393lot zation |
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| 47137. |
15. A boy sharpens a pencil at both the ends and then uses its black ends to complete an electrical circuit. Will the currenti through the electrical circuit? Give reason for your answer. Name the black substance of the pencil. |
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Answer» vvbncnvffkggfmgfmggfbnj |
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| 47138. |
The orbit or shell in an atom is associated with fixed amount of energy and are called as __________ plz answer this i am writing exam now plz |
| Answer» TN -O SPELLS NO | |
| 47139. |
25 It gives metallic crystalsa) Cir b) NaCl c) Diamondd)None of above |
| Answer» OPTION B is CORRECT ANSWERS of this QUESTION | |
| 47140. |
Mad Qo When a certain conduceluilty cell eder blued colth0.02M Ķce, which how specklc conductuity 0.023Then it had a resistance 802. Whenkelis replaced by 0.0025 M KR8Oy bly, it hadresistance 320 2. Coelcellate - 9 cell constantConductivity of Kasoy(u) molar conductance obK, SO4isoln |
| Answer» GET itType NEATLY | |
| 47141. |
Berylium oxide: BeO: : Berylium chloride : |
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Answer» tion:3.2 Beryllium and Beryllium OxideBeryllium/BeO is EXTRACTED from BERYL ore (3BeO.Al2O3. ... BeO is mixed with carbon and chlorinated at 1000 °C to obtain beryllium chloride. To reduce its VAPOR pressure, beryllium chloride is mixed with sodium chloride to obtain an ELECTROLYTE which melts at 370 °C. |
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| 47142. |
How many times heavier is one atom of carbon than one atom of oxyen |
| Answer» ONE CARBON ATOM is 0.75 TIMES that of OXYGEN atom. | |
| 47143. |
The charge of an electron is 1.6x10-19 Coulombs. What will be the value ofcharge on Na+ ion(A) 1.6x10-19C(B) 3.2x10-19C(C) 2.4x10-19C(D) 11x1.6x10-19C |
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| 47144. |
1. Arrange the following as per instructions provided in the brackets.a) CI, F, Br, 1 (Increasing order of electron affinity).b) Cs, Na, Li, K, Rb (Increasing metallic character).c) Si, Mg, Na, S, CI (Decreasing order of atomic size).d) B, Be, O, N, F (Increasing order of electronegativity).e) Na, Al, Si, Ar, CI (Decreasing lonisation Potential). |
| Answer» L , Brb. k , Na , LI ,Cs ,RBC. Na , Mg , SI , S , Cl REVERSE thisd. B , O , N , Be , Fe. Ar , Si ,Al, Cl ,Na | |
| 47146. |
10 moles of HCl is added to excess of magnesium and forms 4 moles of hydrogen gas the percentage yield is ? |
| Answer» TION:BONJOUR Madame I yyyytt I am not sure if you have any QUESTIONS or NEED yyyytt I am not sure if you have my TIME at the same the answer is yes then please let me | |
| 47148. |
Take 1 mL starch solution (1%) in two test tubes (A) and (B). Add 1 ml saliva to test tube A and leave both test tubes undisturbed for 20-30 minutes.Now add a few drops of dilute iodine solution to both the test tubes. Whichof the following observation regarding the both the test tubes A or Biscorrect? * |
| Answer» HI here is your ANSWEREXPLANATION:PLEASE MARK as brailest | |
| 47149. |
13. The oxidation number of C in(1 Point)CO2+2-2.-4+4. |
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Answer» +4 ....... as the oxidation state of OXYGEN is -2 and 2×-2 will give -4 .... so to BALANCE the CHARGE C should be +4 |
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| 47150. |
Mnemonic to remember periods and groups of periodic table? |
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Answer» tion:Groups/Periods Mnemonics for Periodic Table in Hindi Periodic Table ElementsLanthanides 3 Engineer Tum Yebhi Luto Eu Gd Tb Dy HoActinides 1 Thode PAPA Unse Napenge. Th Pa U NpActinides 2 Purana Aam K(C)am Bikenge. PU Am CM BkActinides 3 Final Mood No Larai Fm Md No Lr |
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