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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.
| 401. |
An electron carries a ............... charge |
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Answer» Answer: An electron CARRIES negative charge. |
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| 402. |
Avoid plastic as far as possible. comment on the advice. |
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Answer» Answer: Plastics are non-biodegradable materials. So use of plastics is harmful for our ENVIRONMENT. The plastics cannot be finally disposed off. Thus, plastics should be avoided as far as possible. Explanation: Plastics cause environmental pollution. (ii) They cannot be burnt as when burnt, they release poisonous GASES. Plastic BAGS thrown in the garbage dump are swallowed by animals like cows. ... Therefore, we should AVOID plastics as far as possible. |
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| 403. |
Chemical equations Tell me guys |
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Answer» Answer: 1. 2Al+3O2--->2Al2O3 2.N2+3H2--->2NH3 |
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| 404. |
What type of charge do electrons contain? |
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Answer» Answer: whose electric CHARGE is negative one elementary charge. Electrons belong to the FIRST generation of the lepton particle family, and are GENERALLY thought to be elementary particles because they have no known components or substructure. The electron has a mass that is APPROXIMATELY 1/1836 that of the proton. |
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| 405. |
please answer fast.if answered correctly i will mark as brainlies. pls answer only if you know otherwise ignore |
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| 406. |
What is differences between homogeneous and heterogeneous mixture??? |
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Answer» A homogeneous mixture is a SOLID, liquid or gaseous mixture that has the same proportions of its components throughout any given SAMPLE. CONVERSELY, a heterogeneous mixture has components in which proportions vary throughout the sample. mark me as BRILLIANT and FOLLOW me |
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| 407. |
Differentiate between upper meniscus and lower meniscus |
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Answer» Answer: A meniscus MAY be either concave or convex. A concave meniscus curves downward; if you are looking down from the top, it curves away from you, like the opening of a cave would. In CONTRAST, a convex meniscus curves upward; if you are looking down into the CONTAINER, the meniscus curves toward you. Please mark as the Brainliest Answer and GIVE thanks to my all Answers. |
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| 409. |
FILL THE BLANKS :-----------------------------1: Chemistry is a part of _______.2: The examples of agriculture in chemistry are __________ and _________.3: ___________ process is used to preserve the food.4: Chemistry is used in ______.5: The examples of glass and thermoplastic are :-a) glass -b)thermoplastic- |
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| 410. |
What is the chemical formula of hydrated ferricoxide ? |
Answer» "Fe2H2O4".....✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️ |
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| 411. |
Is sea water a pure substance or a impure substance?explain |
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Answer» it is not a PURE water it CONTAINS of salt and POLLUTED RIVER water also joins it. |
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| 412. |
Why water is compound and air is mixture give 5 reason |
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Answer» Answer: WATER is a compound because it is COMPOSED of water molecules, each one with 2 H atoms & 1 O atom. ... Air is a mixture because it is in fact composed of mostly O-gas molecules (each with 2 O atoms) and N-gas molecules (each composed of 2 N atoms)... Water is formed by the chemical bond between 2 hydrogen and one oxygen atom. A bond between atoms of water can be broken by chemical REACTION. ... Hence, water is a compound because it can only be separated into hydrogen and oxygen atom by chemical reaction. |
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| 413. |
Why do fish show signs of stress on a hot day? |
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Answer» Answer: HI there is no way I could GET the CHANCE of getting the best of my FRIENDS |
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| 414. |
which of the following reaction is an endothermic reaction 1. slake of lime 2.electrolyses of water 3.respairtion 4. decompasition of vegetable matter |
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Answer» Answer: 1.ex 2.en 3.ex 4.en................... |
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| 415. |
C. Match the statements in Column A, with those in Column B.ColumnsColumn A(a) Nitric acid1. The elements which are generally good conductors of electricity(b) Mercury2. The smallest unit of matter which can exist independently.(c) Metals3. An acid containing nitrogen in its molecule.4. A metal which is liquid at room temperature,(d) Graphite5. A non-metal which conducts heat and electricity,(e) Molecule |
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Answer» 1---(c) 2--(E) 3--(a) 5--(d) HOPE IT HELPS!!! |
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| 416. |
What do you mean by mattellic character.. free points enjoy and thanks my answer |
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Answer» Answer: MARK ME AS BRAINLISTER Explanation: METALLIC character REFERS to the level of reactivity of a metal. Metals TEND to lose electrons in chemical reactions, as indicated by their low ionization energies. WITHIN a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. |
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| 417. |
------- fought a guerrilla war against the British with the support of several tribal and peasant. |
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Answer» is the answer ............... |
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| 418. |
electrons are negatively charged, then why are they not attracted towards the nucleus and fall into it... |
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Answer» Electrons are not little balls that can fall into the nucleus under ELECTROSTATIC attraction. Rather, electrons are quantized wavefunctions that spread out in space and can sometimes act like particles in limited ways. An ELECTRON in an atom SPREADS out ACCORDING to its energy. |
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| 419. |
how do boiling point varies with increase and decrease in external pressure. support your answer with real life example. |
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Answer» The BOILING POINT increases with increased pressure up to the critical point, where the gas and liquid properties become identical. The boiling point cannot be increased beyond the critical point. LIKEWISE, the boiling point decreases with decreasing pressure until the triple point is reached. |
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| 420. |
Compare reactivity of alkali and alkaline earth metal? |
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Answer» It takes more ENERGY to REMOVE two valence ELECTRONS from an atom than ONE valence electron. This makes alkaline Earth metals with their two valence electrons less reactive than alkali metals with their one valence electron. hope it helps u mark me as brainliest Explanation: |
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| 421. |
Give two examples of industrial gas in gas solutions? |
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Answer» Answer: example of gas in gas is oxygen mixed with nitrogen, carbon dioxide etc. SOLUTION: A liquid mixture in which the minor component (the solute) is UNIFORMLY DISTRIBUTED within the MAJOR component (the solvent). i) water is example as the oxygen is mixed in it and also Coca-Cola as carbon dioxide is DISSOLVED in water |
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| 422. |
.MCl is the formula of chloride of metal M. The formula of Nitride of the metal M will be, * |
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Answer» The formula of a METAL is MCl2 => valency of M is 2+ Therefore formula of its sulphate is MSO 4. (Valency of SO 4 is 2-) Its Zincate is MZnO 2. (Valency of ZNO 2 is 2-) It's hydroxide it M(OH) 2. (Valency of OH is 1-) |
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| 423. |
A solution contains 5 ml of alcohol in 70 ml of water. Calculate the volume of volume percentage of the solutionuse the above-mentioned formulaStep by Step solution is required. |
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Answer» Answer: a SOLUTION contains 5 ml of alcohol in 70 ml of water. Calculate the volume of volume percentage of the solution. THEREFORE volume% of the solution is 7.14%.May 6, 2020 |
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| 424. |
do you think that reactivity and electro positive are related to each other? explain with help of solid reason. |
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Answer» Answer: Explanation: Yes . The tendency of an element to lose electrons and forms positive ions (cations) is called electropositive or metallic character. The elements having lower IONISATION ENERGIES have higher tendency to lose electrons, THUS they are electropositive or metallic in their behaviour. Alkali metals are the most highly electropositive elements. Periodicity: In period- The electropositive or metallic characters decreases from LEFT to right in a period. |
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| 425. |
A solution contains 5 ml of alcohol in 70 ml of water. Calculate the volume of volume percentage of the solutionuse the above mentioned formula |
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Answer» Answer: Answer: a SOLUTION contains 5 ml of ALCOHOL in 70 ml of WATER. Calculate the VOLUME |
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| 426. |
Substance which do not Sublime .CampherIodineNapthaleneWater |
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Answer» Napthalene please MARK me as the BRAINLIEST and CLICK THANKS |
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| 427. |
An element is a_____ as it has atoms of only one kind |
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Answer» PRUE element Explanation: HOPE IT HELPED YOU please MARK it as BRAINLIEST answer Thanks and Regards |
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| 428. |
How does the nature of two substances help us to understand their solubility?? |
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Answer» It is the CONCEPT of like dissolve like.. |
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| 429. |
Name the following. one worda) the force of attraction between the molecules of a substanceb)the amount of space occupied by matter c)a type of change in which the chemical composition dosent change |
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Answer» THANKS you... |
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| 430. |
write down the formulas of potassium sulphate , potassuim nitrate , copper nitrate , sodium sulphate , magnesuim hydroxide - pleasew answer fast and show properly |
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Answer» K2SO4 KNO3 CuNO3 Na2SO4 |
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| 431. |
Balance fe +cl2 =fecl2 |
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Answer» true Explanation: i hope it HELPS you,please MARK it as BRAINLIEST also follow me....... ... |
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| 432. |
The molecules of an ___ are made up of the same type of atoms |
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Answer» Compounds are MADE of two or more atoms of DIFFERENT elements, such as WATER (H2O) and methane (CH4). Atoms are not drawn to scale. Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom. please MARKED it as brilliant |
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| 433. |
illustrate the chemical bond in the following covalent compounds using electron dot diagram.HF,H2O. |
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Answer» Answer:1. Hydroflourde 2.Water Explanation: |
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| 434. |
Na is considered asoptions 1. 1 atom of sodium 2. 1 molecule of sodium 3. 1 atom as well as 1 molecule of sodium4. none of above |
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Answer» Explanation: 1 .1 atom of sodium is the correct answer.... GIVE me thanks..... |
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| 435. |
RMM of a molecule of Chlorine will be _______, if RAM of Cl=35.5 |
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Answer» gsudhuushhshhjeggshcshhdhhdugeh |
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| 436. |
Na is considered asoptions 1. 1 atom of sodium 2. 1 molecule of sodium 3. 1 atom as well as 1 molecule of sodium4. none of above |
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Answer» Answer: Sodium is a CHEMICAL element with symbol Na and atomic number 11. Classified as an alkali metal, Sodium is a solid at room temperature. Explanation: HOPE it helps you PLEASE mark as BRAINLIEST answer and thanks my answer please follow me |
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| 437. |
.Classify each of the following as a physical or chemical change. Give reasons.a) Drying of a shirt in the sunb) Rising of hot air over a radiatorc) Burning of kerosene in a lanternd) Change in the colour of black tea on adding lemon juice to ite) Churning of milk cream to get butter. |
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Answer» physical change : 1, 2 chemical changes: 3,4,5 Explanation: |
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| 438. |
Which information is convayed by an element if,it represents one atom of elementoptions1. qualitative 2. quantitative 3.both of above 4.none of these |
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| 439. |
100 g of a steel block consists of 4.8% carbon and the rest is iron. Find the ratio of the number of mole of iron to that of carbon. (Given that- atomic mass of Cand Fe = 12 u and 56 u respectively) first and the right answer will be marked as brainliest :) |
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Answer» ANSWER: In a reaction 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g WATER and 8.2 g of sodium ethanoate. Show that these observations are in agreement with the law of conservation of mass carbonate. Ans. Sodium carbonate + Ethanoic acid → Sodium ethanoate + Carbon dioxide + Water 5.3 g + 6 g → 8.2 g + 2.2 g + 0.9 g LHS RHS 11.3 g = 11.3 g (Mass of reactant) (Mass of product) This shows, that during a chemical reaction mass of reactact = mass of product. 2. Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water. What mass of oxygen gas WOULD be required to react completely with 3 g of hydrogen gas? Ans. Ratio of H : O by mass in water is: Hydrogen : Oxygen → H2O 1 : 8 = 3 : x x = 8 × 3 ∴ 24 g of oxygen gas would be required to react completely with 3 g of hydrogen gas |
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| 440. |
interconversion of matter on the basis of kinetic theory? A. PARTICLES GAIN ENERGY B. PARTICLES LOOSE ENERGY C. INTERMOLECULAR SPACE DECREASES D. INTERMOLECULAR SPACE INCREASES |
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Answer» Answer: Hi! EXPLANATION: D Intermolecular SPACES DECREASE. Thanks. |
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| 442. |
8. Which of the following is/are true when milk changes into curd?1. Its changes colour from liquid to semisolid it. It changes colour. It changes tasteiv. The changes cannot be reverseda ) and (ii) are correctb.) to (iv) are correctc.(i) and (ii) correctd. (i) and (iii) (iv) are correct9. The gas we use in the kitchen is called Liquified Petroleum Gas (LPG). In thecylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas(change-A) then it burns (change-B). The following statements pertain to thesechanges. Choose the correct one.a. Process - A is a chemical change.b. Process - B is a chemical change.c. Both processes A and B are physical changes.d. None of these processes is a chemical change.10. Anaerobic bacteria digest animal waste and product biogas (change-A). Thebiogas is then burnt as fuel (Change-B). The following statements pertain tothese changes. Choose the correct one.a. Process-A is a chemical change.b. Process-B is a chemical change.c. Both processes A and B are chemical changes.d. None of these processes is a chemical change. |
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Answer» Answer: 8. b the CHANGE cannot be reversed 9. d NONE of the PROCESS is a chemical chanfe 10. C both process A and B are chemical change |
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| 443. |
Name the monomer of cellulose.... |
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Answer» Answer: Beta glucose Cellulose: Beta glucose is the monomer unit in cellulose. As a RESULT of the bond angles in the beta acetal linkage, cellulose is MOSTLY a linear CHAIN. Starch: Alpha glucose is the monomer unit in starch. PLEASE mark as BRAINIEST |
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| 445. |
Matter is composed of __________which do sex with each other? |
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Answer» Hlo mate here is ur ans....... Atoms and MOLECULES are all composed of matter. Matter is ANYTHING that has mass and takes up space.Atoms and molecules are all composed of matter. Matter is anything that has mass and takes up space.Even though matter can be found all over the universe, you will only find it in a few forms on Earth. We cover five states of matter on the site. Each of those states is sometimes CALLED a phase..❤️❤️Hope this helps U dear❤️❤️ ✌️Pls Mark as brainliest✌️Don't FORGET to follow me :) |
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| 446. |
5. The gas we use in the kitchen is called:b. LEGa. LPGC, CNGd. LIG6. A man painted his main gate made up of iron to(0) Prevent it from rusty(11) Prevent it from sun(iii) Make it dust free(iv) Make it look beautifulwhich of the above statement(s) is/are correct?a. (i) and (ii)b. (ii) and (ii)c. only (1)c.) and (iv) |
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Answer» Answer: |
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| 447. |
1. Crystallization is a process to obtainb. Pure liquids onlya. Pure solids onlyd. Solid or liquidc. Pure solids and liquids2. Rusting of iron can be prevented bya. Galvanizationb. ElectroplatingC. All of the abovec. Alloying3. Which of the following is not a chemical change?a. Spoiling of foodb. Heating an iron rodc. Curdling of milkd. Planting a free4. In which type of reaction, no new substance is formed?a. Endothermic reactionb. Exothermic reactionc. Chemical reactiond. Sublimation of a substance |
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Answer» Answer: 2. galvanization 3. planting a tree 4. sublimation of a SUBSTANCE |
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| 448. |
What is knetic theory of matter? short but precisely. |
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Answer» The kinetic theory of matter STATES that all matter is MADE of small particles that are in random motion and that have space between them. This means that no matter what phase matter is in, it is made of separate, moving particles. |
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| 449. |
Why are some fibres called synthetic an some natural? |
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Answer» Answer: Some fibres which are not natural (man-MADE fibres) called synthetic because they are made by chemical processing of petrochemicals. The synthetic fibres are made up of very LARGE units called polymers. Explanation: MARK as brainliest answer please. |
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| 450. |
बाय केमिस्ट वेयर लैब काेटबाइक केमिस्ट्री लैब कोर्ट |
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