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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.
| 1251. |
Which of the following is an antihaemorrhagic vitamin? a) Vitamin A1 b) Vitamin B1 c) vitamin A d) vitamin C |
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Answer» Explanation: hope you have understand |
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| 1252. |
23. If Toluene Disocrate is carried onboard, why DOP to be used to fill up the cofferdam? |
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Answer» I don't UNDERSTAND my friend.Sorry... |
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| 1253. |
Resorcinol on distillation with Zn dust gives |
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Answer» Benzene Resorcinol on DISTILLATION with zinc dust GIVES Benzene. Explanation: |
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| 1254. |
Provided with X M solution of HCL, Prepare 0.05M sodium carbonateTake exactly 25mL of the sodium carbonate, and add 2 drops of methyl orange and add the given solution of HCL until the end point is reached |
Answer»
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| 1255. |
Observe the table given Below and answer the following question .Material . p . Q . R . SResistivity . 100×10-6 . 263×10-8 . 108-1011 . 1.6×10-8 . which of the following can be used in Heating . deices? (A) P (b) Q (c) R (d) Sgive me answer |
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| 1256. |
What do you know about chemical bond class 9 |
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Answer» bjwjhwjkakkjavjajajajannananananan |
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| 1257. |
If the std. Enthalpy of formation of methanol is -238.9 KJ mol-1 then entropy change of the sorounding will be |
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Answer» Prakash all AAP all all all el al am xm am so ri so ri so so cm xm er ek ek ek ek aaj sh aaj dyl do dj FL do dj dj dyl Z sh so yo ch yo yo ch ch bhaiya ji nu gd of is of is of of G so so so feel dj dj FL gh fl do to go to to go gh fl fl to fl fl to to go to to go gh dj FL do fl sh dj d is is of of of of of of is of is us is of of OK ok please undeniably |
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| 1258. |
Chemical bond class 9th |
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Answer» oppositely charged cation and ANION is CALLED an ionic BOND or an electrovalent bond. The COMPOUND formed by means of one or more ionic bonds is called an ionic compound. ... |
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| 1259. |
Liquids generally have lower density as compared to solids.But you must have observed that ice floats on water.Why |
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Answer» Answer: Which hindrance of COMMERCE is highlighted in the following activities? a. It removes the geographical separation between producers and consumers b. Banking and financing institutions provide necessary funds to carry on business activities c. INSURANCE protects the GOODS in case of damage DUE to theft, fire and accidents. d. WAREHOUSING facilities holding goods till they are required. 10. Identify the types of industry highlighted in each of the following |
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| 1260. |
Physical and chemical properties of HCL |
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Answer» Answer: It consists of non-corrosive and non- reactive chloride ion. The PHYSICAL properties like boiling and melting points, density, and pH, of HYDROCHLORIC acid, varies depending on the concentration of hydrochloric acid in water. It is colorless with a highly PUNGENT ODOR. HCl is a strong acid. Explanation: please mark me as brainliest |
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| 1261. |
Chemical properties of dichlorine gas |
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Answer» Answer: PROPERTIES: Chlorine has a melting point of -100.98°C, BOILING point of -34.6°C, DENSITY of 3.214 g/l, specific gravity of 1.56 (-33.6°C), with a valence of 1, 3, 5, or 7. Chlorine is a member of the halogen group of elements and directly combines with almost all of the other elements. Explanation: hope it helps please mark me as BRAINLIEST |
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| 1262. |
Write a note on colours in co-ordination compound |
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Answer» This means that COORDINATION compounds absorb some of the visible SPECTRA from white light when it falls on its SURFACE. The spectrum of light reflected by them doesn't contain the color of a wavelength that was absorbed by the substance |
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| 1263. |
What is the relation between outer most shell number and period number of s block elements? |
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Answer» Answer: The NUMBER of ELECTRON SHELLS is therefore the same across a PERIOD but increases when moving down a group. |
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| 1264. |
Explain the diagram point elevation in terms of temperature lowering |
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Answer» Diagram Explanation: |
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| 1265. |
(b) Discuss the principles of fractional distillation of completely miscible liquid pairs.—essay question with diagram |
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Answer» Answer: Fractional distillation separates miscible liquids that have different BOILING points. ... the VAPOUR CONDENSE when they reach a part of the column that is below the TEMPERATURE of their boiling point. the liquids which condense in the column drip back into the flask. Hope it will help you please mark as Brainliest Answer |
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| 1266. |
Which of the following solids is constructed with a lack of regular order or lattice shape? |
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Answer» Answer: AMORPHOUS SOLID, any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice PATTERN. Such solids INCLUDE glass, plastic, and gel. Explanation: mark me as brainlist plz. |
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| 1267. |
Components of stratosphere |
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Answer» Answer: The temperature in the stratosphere gets warmer as you go up. The mesosphere is above the stratosphere and reaches from about 31-34 miles to 50-53 miles above the earth's surface. ... The composition of the earth's atmosphere is 78% NITROGEN, 21% oxygen, 0.9% argon, and 0.04% carbon dioxide Explanation: The main COMPONENT of stratosphere is Ozone. Explanation: Earth is surrounded by a blanket of gases. It is called atmosphere. Atmosphere is COMPOSED of troposphere, stratosphere, mesosphere and thermosphere. The SECOND major layer of the Earth's atmosphere is stratosphere. Stratosphere is present between troposphere and mesosphere. Stratopause is the upper boundary of the stratosphere. It consists of Ozone, air with little vapour, clouds. As this layer has ozone which is important for the survival of living organisms, it is called as ozone layer. Learn more about stratosphere What is the stratosphere function of the earth atmosphere? What is an important feature of stratosphere |
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| 1268. |
If 400 cm cube of q was collected at 25 degree celsius and 1.20*10 calculate... |
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Answer» Q. Payload is defined as the DIFFERENCE between the mass of displaced air and the mass of the balloon. Calculate the payload, when a balloon of radius 10 m of mass 100 kg is filled with HELIUM at 1.66 BAR at 27 ∘C. (Density of air = 1.2 kg M3 and R = 0.083 bar dm 3 K−1 mol−1) Ans: Answer of the above photo mentioned. |
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| 1269. |
Name the precipitate formed in Calcium Chloride + Magnesium Sulphate |
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Answer» I THINK water ( H²0) mark me as BRAINLIEST |
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| 1270. |
Value of the Henry law constant |
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Answer» Explanation: The Henry's LAW constant for merphos ESTIMATED from STRUCTURE ACTIVITY relationships is 2.27 × 10−5 atm-cu-m mol−1. |
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| 1271. |
The melting point of two solids X and Y are 305 K and 500 K respectively . Which has more interparticle Forces ? Why ? |
Answer» Given :
To FIND :
Answer :1. Solid Y has more interparticle force. 2. Because melting point of a substance reflects the interparticle force of that substance. higher the melting point higher will be the interparticle force . As in substance energy will be required to break the interparticle force which is given in form of HEAT , denoted as melting point |
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| 1272. |
If the result of the experiment are in agreement with the hypothesis, then it becomes a _____ |
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Answer» synthe ... .... |
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| 1273. |
Esterification test is used for the confirmation of |
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Answer» Answer: Every RATIONAL number may be EXPRESSED in a unique way as an irreducible FRACTION ab, where a and b are coprime integers and b > 0. This is often called the canonical FORM of the rational number. |
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| 1274. |
The vapour pressure of pure water at 25°C is 18 mm hg.when a nonelctrolyte is 17.32mm hg.what is the relative lowering of vapour pressure of the solution |
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| 1276. |
1. Write the names of any two acids found in the food that we eat.2. How do we distinguish between acids and bases using an olfactory indicator?3. The pH of fresh milk is 6. What will be the pH when it sets into curd/yogurt? |
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Answer» Vaccines contain weakened or inactive PARTS of a particular ORGANISM (antigen) that triggers an immune response within the body. Newer vaccines contain the BLUEPRINT for producing ANTIGENS RATHER than the antigen itself. |
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| 1277. |
Q 1. Value of Henry law constant? * |
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Answer» The Henry LAW CONSTANT for dissolution of a gas in an AQUEOUS medium is 3×102 atm. mark me as brainlest |
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| 1278. |
A weak acid has a molar mass of 162 g mol-!. Analysis of a 0.8821 g sample showed the composition by mass is 0.0220 g H, 0.3374 g P, and the remainder was 0. Determine its empirical and molecular formulas. |
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Answer» ghdhdhdhfjhfhfhdh Explanation: ggdhdh. jjdbd bhbrnhrurj hdhkdhdv |
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| 1279. |
Write an experiment to prove that air has mass? |
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Answer» Answer: design another experiment to show that air has mass - Brainly.in Experiment : TAKE TWO BALLOONS having same mass . Fill air in one balloon while leave another balloon with out air . Now take a BALANCE and find the weight of the two balloons . You will see that air filled balloon will have higher weight than the other balloon without air , SHOWING that air has mass. |
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| 1281. |
Which of the following is expressed to have the largest bond dissociation enthalpy? |
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Answer» Which hindrance of commerce is highlighted in the following ACTIVITIES? a. It removes the geographical separation between producers and consumers b. Banking and financing institutions provide NECESSARY funds to carry on business activities c. INSURANCE protects the goods in case of DAMAGE due to theft, fire and accidents. d. Warehousing facilities holding goods till they are required. 10. Identify the types of industry highlighted in each of the following |
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| 1282. |
The functional group present in butanol and butanoic acidRespectively a)-OH and- COOH b)-OH and -CHO c)-CHO and- COOH d)-OH and- CO |
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| 1283. |
The hydrocarbon that doesnot undergoes addition reactionamong the following a)C3H8 b)C4H8 c)C3H6 d)C5H10 |
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Answer» A Explanation: jwgeuejgrjrbrhidbrgr |
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| 1284. |
What is the physical state of water at 14°C. |
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Answer» Answer: The physical state of water at 250 \[^{o}C\]is a gaseous state. We all know that the boiling point of water is 100\[^{O}C\]. After attaining the temperature 100\[^{o}C\], the water starts CONVERTING into a gaseous state as it changes into VAPOURS and boiling OCCURS |
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| 1285. |
Can Anyone tell me the correct answer please |
Answer» ====》BOILING of MILK and Boiling of EGG are Physical and CHEMICAL changes respectively. |
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| 1286. |
If a fluoride of uranium contains 67.62% uranium by mass, what is its empirical formula? |
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Answer» The EMPIRICAL formula for the COMPOUND CONTAINING uranium and fluorine is UF6 . |
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| 1287. |
Multiple choice questions 1. Plant is called herbal Indian doctor a) neem. b) tulsi c) turmeric d) ginger 2. Metal present in haemoglobin is a) zinc b) lead c) iron d) chromium 3. The hardest part of human body is a) enamel b) thigh c) jaw d) skull 4. Which animal has a teeth in its stomach a) lobester b) fish c) shark d) chameleon 5. Chemistry word taken from ( ) a) Greek b) Indian c) Arabic d) french 6. Total no.of elements present in periodic table ( ) a) 118 b) 220 c) 120 d) 119 7. Symbol of element Nitrogen ( ) a) No b) N c) Ni d)Ne 8.A pull or a push on an object ( ) a) force b) action c) reaction d) stress 9. C.G.S unit of Force....( ) a) newton b) Dyne c) joule d) erg 10.strength of force is called(. ) a)magnitude b) direction c)both a.b d) none |
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Answer» Answer: |
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| 1288. |
The least reactive metal among the following a)Na b)Ca c)K d)Al |
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Answer» a)nasjjdhwjqjajssjwwiiw |
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| 1289. |
If molecular formula of a compound is C4H8O2 and empirical formula is C2H4O them its multiple number is |
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Answer» The multiple number is 2. Explanation: MOLECULAR FORMULA = n × empirical formula
= C4H8O2 |
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| 1290. |
Convert the following temperature to the celsius scale a) 470k. b) 298k |
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Answer» ok USE a formula you will DEFINITELY GET it |
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| 1291. |
If vapour density of a compound is 56, what is its molecular mass ? |
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| 1292. |
61.Dilution of acids results in decrease in the concentration ofA. OH- IonsB. H30+ IonsC. O+-IonsD. Both OH+ Ions and H30- Ions |
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Answer» the correct answer is B because I am TELLING as I am BRILLIANT STUDENT |
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| 1294. |
Kisi parmanu ke naabhik men koun koun se mul Jan PAYE Kate Hain? |
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| 1295. |
Determine the identity of element X in a compound XCO3 which has 40% by mass of X and 12% by mass of carbon. |
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Answer» The Compound is CaCO3 ( calcium carbonate) in which the mass PERCENTAGE of Ca, C and oxygen are 40 , 12 and 48 respectively. |
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| 1296. |
Plss help yrrr plsss |
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Answer» SORRY but I didn't UNDERSTAND the handwriting and QUESTION. |
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| 1297. |
10. E 0 red of X , Y , Z and W are -2.93 V , -0.25 V , - 3.05 V and – 0.74 V respectively. Decreasing order oftheir activity is :(a) X > Y > Z > W (b) Z > X > W > Y(c) Y > X > W > Z (d) None of these |
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Answer» xyxy 7cifjohfigfih Explanation: hyihxyifjojgtijhg |
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| 1298. |
Q. 1 what is octet rule ? explain with example |
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Answer» Answer: ek BAAT batau ye atoms bi BADE jiddi hote he apne andar elections ko samate he par L or M shells me apne orbit me 8 ELECTRONS rakhte he aur isi kand ko HI ham log octet rule kehte he |
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| 1299. |
* 2.18 Calculate the mass of a non-volatile solute (molar mass 40 g mol") whichshould be dissolved in 114 g octane to reduce its vapour pressure to 80%. |
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Answer» Let p be the vapour pressure of pure OCTANE. The vapour pressure of solution will be 80/100p=0.8p Molar MASS of solute (M) and octane (m) are 40 g/mol and 114 g/mol respectively. Mass of octane, w is 114 g. p−p'/p=Wm/Me p-0.8p/p=W*114/40*114 W=8gm Hence, 8 g of solute are required |
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| 1300. |
Write electornic configuration of carbon , calcium, and fluorine |
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Answer» write electornic configuration of CARBON , CALCIUM, and FLUORINE |
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