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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.
| 2651. |
Explain the process of salt formation through a flow chart. Identify the changes that happen during this process and classify them as physical and chemical changes. |
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Answer» ong>ANSWER: please MARK a brainlist and follow me |
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| 2652. |
Complete the following table in.Physical/ChemicalReversible/ Irreversible |
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Answer» ONG>ANSWER: BURNING of matchstick is physical change baking of cake is chemical change making of a PAPER boat is physical change making of sugar solution is chemical change evaporation of water during water cycle is chemical change Explanation: if answer is wrong sorry for that |
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| 2653. |
Answer the questions pertaining to the chemical equation given below. Curs) + 2H2SO4 Q - CuSO4(s) + SO2(g) + 2H20)(i)State what the term (g) stands for.(ii) Is the above equation balanced? Justify your answer in one sentence.(iii) How many molecule/s of copper sulphate have been formed? |
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Answer» ong>ANSWER: (i) The term (g) shows that the substance produced as a result of the reaction is a gas. (ii) Yes, the above equation is balanced as the NUMBER of atoms on the reactant side is EQUAL to the number of atoms on the product side. (iii) ONE molecule of copper sulphate is formed. Hope it helps!! |
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| 2654. |
Solids are non compressible give reasons |
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Answer» ong>Answer: Solids are not compressible because the molecules are tightly packed and the inter MOLECULAR space is less or is NEGLIGIBLE . HOPE this helps. |
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| 2655. |
Define the following terms.i) Matterii) Element. |
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Answer» ONG>Answer: matter : Matter, material substance that constitutes the observable universe and, TOGETHER with energy, FORMS the basis of all objective phenomena. element : an element is a pure substance which cannot be BROKEN down by chemical means I hope you like it |
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| 2656. |
List of a valance all the 108 elements |
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Answer» ong>Answer: Explanation: NUMBER SYMBOL ELEMENT VALENCE 1 H Hydrogen 1, 0, -1 2 He Helium 0 3 Li Lithium 1, -1 4 Be Beryllium 2 5 B Boron 3, 2, 1 6 C Carbon 4, 3, 2, 1, -1, -2, -4 7 N Nitrogen 5, 4, 3, 2, 1, 0, -1, -2, -3 8 O Oxygen 2, 1, 0, -1, -2 9 F Fluorine 0, -1 10 Ne Neon 0 11 Na Sodium 1, -1 12 Mg Magnesium 2 13 Al Aluminum 3, 1 14 Si Silicon 4, 3, 2, 1, -1, -2, -4 15 P Phosphorus 5, 4, 3, 2, 1, 0, -1, -2, -3 16 S Sulfur 6, 5, 4, 3, 2, 1, 0, -1, -2 17 Cl Chlorine 6, 5, 4, 3, 2, 1, 0, -1, -2 18 Ar Argon 0 19 K Potassium 1, -1 20 Ca Calcium 2 21 Sc Scandium 3, 2, 1 22 Ti Titanium 4, 3, 2, 0, -1, -2 23 V Vanadium 5, 4, 3, 2, 1, 0, -1, -2 24 Cr Chromium 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4 25 Mn Manganese 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3 26 Fe Iron 6, 5, 4, 3, 2, 1, 0, -1, -2 27 Co Cobalt 5, 4, 3, 2, 1, 0, -1 28 Ni Nickel 6, 4, 3, 2, 1, 0, -1 29 Cu Copper 4, 3, 2, 1, 0 30 Zn Zinc 2, 1, 0 31 Ga Gallium 3, 2, 1 32 Ge Germanium 4, 3, 2, 1 33 As Arsenic 5, 3, 2, -3 34 Se Selenium 6, 4, 2, 1, -2 35 Br Bromine 7, 5, 4, 3, 1, 0, -1 36 Kr Krypton 2, 0 37 Rb Rubidium 1, -1 38 Sr Strontium 2 39 Y Yttrium 3, 2 40 Zr Zirconium 4, 3, 2, 1, 0, -2 41 Nb Niobium 5, 4, 3, 2, 1, 0, -1, -3 42 Mo Molybdenum 6, 5, 4, 3, 2, 1, 0, -1, -2 43 Tc Technetium 7, 6, 5, 4, 3, 2, 1, 0, -1, -3 44 Ru Ruthenium 8, 7, 6, 5, 4, 3, 2, 1, 0, -2 45 Rh Rhodium 6, 5, 4, 3, 2, 1, 0, -1 46 PD Palladium 4, 2, 0 47 Ag Silver 3, 2, 1, 0 48 Cd Cadmium 2, 1 49 In Indium 3, 2, 1 50 Sn Tin 4, 2, -4 51 Sb Antimony 5, 3, -3 52 Te Tellurium 6, 5, 4, 2, 1, -2 53 I Iodine 7, 5, 3, 1, 0, -1 54 Xe Xenon 8, 6, 4, 3, 2, 0 55 Cs Cesium 1, -1 56 Ba Barium 2 57 La Lanthanum 3, 2 58 Ce Cerium 4, 3, 2 59 Pr Praseodymium 4, 3, 2 60 Nd Neodymium 4, 3, 2 61 Pm Promethium 3 62 Sm Samarium 3, 2 63 Eu Europium 3, 2 64 Gd Gadolinium 3, 2, 1 65 Tb Terbium 4, 3, 1 66 Dy Dysprosium 4, 3, 2 67 Ho Holmium 3, 2 68 Er Erbium 3 69 Tm Thulium 3, 2 70 Yb Ytterbium 3, 2 71 Lu Lutetium 3 72 Hf Hafnium 4, 3, 2, 1 73 Ta Tantalum 5, 4, 3, 2, 1, -1, -3 74 W Tungsten 6, 5, 4, 3, 2, 1, 0, -1, -2, -4 75 Re Rhenium 7, 6, 5, 4, 3, 2, 1, 0, -1, -3 76 Os Osmium 8, 7, 6, 5, 4, 3, 2, 1, 0, -2 77 Ir Iridium 6, 5, 4, 3, 2, 1, 0, -1 78 Pt Platinum 6, 5, 4, 2, 0 79 Au Gold 7, 5, 3, 2, 1, 0, -1 80 Hg Mercury 2, 1 81 Tl Thallium 3, 1 82 Pb Lead 4, 2 83 Bi Bismuth 5, 3, 1, -3 84 Po Polonium 6, 4, 2, -2 85 At Astatine 7, 5, 3, 1, -1 86 Rn Radon 2, 0 87 Fr Francium 1 88 Ra Radium 2 89 Ac Actinium 3 90 Th Thorium 4, 3, 2 91 Pa Protactinium 5, 4, 3 92 U Uranium 6, 5, 4, 3, 2 93 Np Neptunium 7, 6, 5, 4, 3, 2 94 Pu Plutonium 7, 6, 5, 4, 3, 2 95 Am Americium 7, 6, 5, 4, 3, 2 96 Cm Curium 6, 5, 4, 3, 2 97 BK Berkelium 4, 3, 2 98 Cf Californium 5, 4, 3, 2 99 Es Einsteinium 4, 3, 2 100 Fm Fermium 4, 3, 2 101 Md Mendelevium 3, 2, 1 102 No Nobelium 3, 2 103 Lr Lawrencium 3, 2 104 RF Rutherfordium 4, 3 105 Db Dubnium 5, 4 106 Sg Seaborgium 6, 5, 4 107 Bh Bohrium 7, 6, 5, 4, 3 108 Hs Hassium 8, 7, 4, 3, 2 109 Mt Meitnerium 6, 5, 4, 3, 2, 1 110 Ds Darmstadtium 6, 5, 4, 3, 2, 1 111 Rg Roentgenium 3, -1 112 Cn Copernicium 2, 1 113 Nh Nihonium 1 114 Fl Flerovium 2 115 Mc Moscovium 3, 1 116 Lv Livermorium 4, 2 117 Ts Tennessine unknown 118 Og Oganesson 8, 6, 4, 2 |
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| 2657. |
Name the non-metallic element which conducts electricity. |
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Answer» ONG>Answer: Graphite Explanation: Graphite is a non-metal and it is the only non-metal that can conduct electricity. You can FIND non-metals on the right SIDE of the periodic table and graphite is the only non-metal that is a good CONDUCTOR of electricity. |
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| 2658. |
8. Name the essential element that we inhale ? |
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Answer» align="absmiddle" alt="{\TT{\purple{\UNDERLINE{\underline{\huge{Answer:}}}}}}" class="latex-formula" id="TexFormula1" SRC="https://tex.z-dn.net/?f=%7B%5Ctt%7B%5Cpurple%7B%5Cunderline%7B%5Cunderline%7B%5Chuge%7BAnswer%3A%7D%7D%7D%7D%7D%7D" title="{\tt{\purple{\underline{\underline{\huge{Answer:}}}}}}"> Oxygen is the essential element that we inhale. _________________________ |
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| 2659. |
Why caramelization of suger is a chemical change |
Answer» ONG>Answer:Caramelization is a type of non-enzymatic browning reaction. As the process occurs, volatile chemicals are released producing the characteristic caramel flavor. The reaction involves the REMOVAL of water (as STEAM) and the break down of the SUGAR. The caramelization reaction depends on the type of sugar. |
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| 2660. |
Example for Oct atomic element |
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Answer» ong>Answer: Octa atomic SPECIES are those which are made up of eight ATOMS. For example, sulphur molecule is an octaatomic molecule made up of eight atoms of sulphur and is DENOTED by S8. HOPE IT HELPS!!!! Octa atomic species are those which are made up of eight atoms. |
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| 2661. |
Why method of distillation cannot be used for all kinds of miscible liquids |
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Answer» ONG>Explanation: Method of DISTILLATION cannot be USED for all kinds of miscible liquids because two liquids can have a difference of LESS than in their boiling POINT. Explanation: Distillation is defined as the method used to separate two liquids with a difference of less than or around in their boiling point. |
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| 2662. |
Explain the following term Symbol |
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Answer» ONG>Answer: okkkkk Explanation: |
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| 2663. |
(Fuels/Fossils) are substances that produce heat and light energy on bure -(Kerosene/Fuel Oil) is used as a fuel in power stations and ships.Fill in the blanks with the correct words.1. Kerosene, petrol, diesel and fuel oil are examples ofLet's(solid/liquid) fuels.(Anthracite/Lignite) is the highest grade of coal.(LPG/Hydrogen) has the highest calorific value.4.————( lpg/hydrogen) has the highest calorific value 5.-----------------(kerosene/Fuel oil) is used as a fuel in power stations and ships |
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Answer» ONG>Answer: 4 hydrogen 5. KEROSENE |
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| 2664. |
119120 Answer the following questions brieflyawhat is the northern plains other name. |
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Answer» ong>Explanation: The Indo-Gangetic Plain, also known as the Indus-Ganga Plain and the NORTH Indian River Plain, is a 2.5-million KM2 (630-million-acre) fertile plain encompassing northern regions of the Indian subcontinent, INCLUDING most of northern and eastern India, the eastern PARTS of Pakistan, virtually all of BANGLADESH |
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| 2666. |
The controversial artificial sweetener saccharin has the molecular formula C3H5O5NS. What is the mass in grams of one molecule? Atomic weights: C = 12.01, H = 1.008, O = 16.00, N = 14.01, S = 32.06. a.5.55×10−21 b.3.85×10−22 c.2.24×10−22 d.2.24×10−21 |
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| 2667. |
The reactivity series of metals is a list of common metals arranged in the (increasing/decreasing) order of reactivity. |
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Answer» ong>ANSWER: REACITIVITY SERIES of metals is in DECREASING order. |
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| 2668. |
2g of a sample of sodium chloride contains 0.785 gram of sodium and 1.775 gram of chlorine another sample 2.925 gram of sodium chloride was found to contain 1.15 gram of sodium and 1.775 gram of chlorine. So that these data are agreement with the law of constant proportion. |
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Answer» ong>Answer: I don't KNOW this answer Explanation: |
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| 2669. |
Why saperation of mixture is required |
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Answer» align="absmiddle" ALT="\huge\boxed{\fcolorbox{red}{YELLOW}{Answer}}" class="latex-formula" id="TexFormula1" src="HTTPS://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B%5Cfcolorbox%7Bred%7D%7Byellow%7D%7BAnswer%7D%7D" title="\huge\boxed{\fcolorbox{red}{yellow}{Answer}}"> A mixture is actually made up of pure substances only. But they get mixed with each other in a mixture. SOMETIMES the INDIVIDUAL pure substances are more important than the mixture. Thus, separation of substances is necessary to obtain pure substances for domestic purposes, industrial purposes and research work. ───────────────────────── |
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| 2670. |
1) What was the source of alpha particles in Rutherford scattering experiment? 2) Name the subatomic particles which determine the mass of an atom.3) Out of three states of matter, which one has minimum spaces between particles?4) What do CNG stand for?5) A substance has a definite shape as well as a definite volume. Which physical state isrepresented by this statement |
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Answer» ong>Answer: hii I think that it helps you Explanation: 1. Rutherford and coworkers were able to demonstrate that the alpha particle was an atom of helium (later to be determined to be a nucleus of helium), and that helium gas would accumulate or be entrapped in minerals that contained radium. 2. ATOMS are made up of particles CALLED protons, neutrons, and electrons, which are responsible for the mass and charge of atoms. 3. Among all forms of MATTER, solid state has minimum space between the particles. 4. compressed natural gas This is the acronym for compressed natural gas (CNG). 5. Solid Solid is the substance having definite shape as well as definite VOLUME. |
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| 2671. |
Rewrite the following statements by inserting appropriate word/words. [5] (i) The burning of woodis a change which results in the formation of new substances. |
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Answer» ER: Explanation: The BURNING of wood is a change which RESULTS in the formation of coal. |
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| 2672. |
Name the following:- 1) Elements that do not react chemically -2) Elements showing properties of both metals and non metals -3) The smallest particle of an element or compound which has independent existence - |
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Answer» ONG>Answer: 2) METTALOIDS ........ |
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| 2673. |
What is sublimation |
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Answer» ! Sublimation is a process in which SOLID directly changes to gaseous form or vapour form on heating .Hope this helps you !! #BTS Army FOREVER ✌️ |
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| 2674. |
1) What was the source of alpha particles in Rutherford scattering experiment? 2) Name the subatomic particles which determine the mass of an atom.3) Out of three states of matter, which one has minimum spaces between particles?4) What do CNG stand for?5) A substance has a definite shape as well as a definite volume. Which physical state isrepresented by this statement? |
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Answer» ONG>Answer: 1. helium 2.neutrons and PROTONS 3.solid STATE 4.compressed NATURAL gas 5.solid state |
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| 2675. |
Name the following:- 1) Elements that do not react chemically -2) Elements showing properties of both metals and non metals - |
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Answer» ONG>ANSWER: Okayy Explanation: i)BASES with bases ii)Matelloids |
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| 2676. |
Please balance this equation. |
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Answer» ong>Answer: 2Al + 3H2SO4 ------------> Al2(SO4)3 + 3H2 .... Hope it HELPS... |
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| 2677. |
Observe the information given below and answer the questions that follow: Samples of three metals A, B and C were taken and added to the following solutions.The observations of the experiment are given in the table below:SolutionMetal AMetal BMetal CCopper sulphateReactionNo reactionReactionZinc sulphateNo reactionNo reactionNo reactionReactionNo reactionIron SulphateNo reaction(i)(iii)(iv)Which metal is the most reactive?Arrange the metals in the decreasing order of reactivity.Name and define the type of reaction represented in the given table.Complete the given equation:Copper sulphate + Iron → |
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Answer» ONG>ANSWER: fgjj is the CURRET answer |
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| 2679. |
Write all the odd numbers from 30 to 40 |
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Answer» ONG>Explanation: plz thank me |
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| 2680. |
A) Which subatomic particle is absent in an ordinary hydrogen atom? b) What is the scientific name of particles which make up matter?c) Name the state of matter in which layers of particles can slip and slide over one anothereasily |
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Answer» ong>Answer: please MARK as brainlist answer!!Explanation- Neutron, NEUTRAL subatomic particle that is a CONSTITUENT of every atomic nucleus except ORDINARY hydrogen.I hope this will help you!!❣❣❣ |
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| 2681. |
The size of an atom is decided by the number of dash a) electron b) proton c) neutron d) nucleus |
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Answer» ONG>ANSWER: ELECTRONS DERTERMINE the SIZE |
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| 2682. |
B) Plastics have made our everyday life very easy but plastics are not eco-friendly. State any two methods to protect the environment from hazards related to plastics. |
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Answer» ONG>Explanation: 1- RECYCLE it 2-PLASTIC throw in DUSTBIN because animal animal eats plastic |
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| 2683. |
Write True or False. Correct the false statements. 1. A pure substance consists of a single type of particle.-2. Some metals exit as gases.-3. Sulphur is a metalloid.-4. Compounds are substances made up of two or more elements.-5. A molecule of hydrogen is made up of three atoms of hydrogen.-Note:- If the sentence is false then don't forget to correct the statement. |
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Answer» ONG>Answer: 2 Explanation: OPTION............ |
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| 2684. |
The size of an atom is decided by the number of dash |
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Answer» ong>Answer: atomic properties Explanation: Atomic Properties. The atom is about 10-10 METERS (or 10-8 centimeters) in size. This MEANS a ROW of 108 (or 100,000,000) atoms would stretch a centimeter, about the size of your fingernail. Atoms of different elements are different sizes, but 10-10 m can be thought of as a rough VALUE for any atom. |
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| 2685. |
Which metal we will use In hydrogenation catalyst |
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Answer» ong>Hydrogenation is a CHEMICAL reaction between molecular hydrogen (H2) and another compound or element, USUALLY in the PRESENCE of a catalyst such as nickel, palladium or platinum. The process is COMMONLY employed to reduce or saturate organic compounds. radhe radhe ❤️❤️ |
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| 2686. |
The position of the image of an object due to spherical mirror depends on |
Answer» Hope it helps youplease mark me the Brainlist ANSWER and THANK my answer |
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| 2687. |
What are the two types of woollen fibres obtained after the process of combing?mention their uses |
Answer» ONG>ANSWER:please MARK as brainlist answer!!Explanation- There are two TYPES of fibre, viz. natural and man-made. Sorting: The process of separating the fleece of a sheep into sections ACCORDING to the quality of woolen fibres is called sorting. The hairy skin is sent to a factory where hair of different textures is sorted.I hope this will help you!!❣❣❣ |
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| 2688. |
The range of laboratory thermometer _________ |
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Answer» ONG>Explanation: It ranges from -10˚C to 110˚C. Mark me BRAINLIEST PLEASE |
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| 2689. |
A non metal which is a good conductor of heat and electricity... |
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| 2690. |
Name the device that is used to measure gold and silver |
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Answer» er: Hope it HELPS... Explanation: Baijnath Premnath DM-3 500g x 0.01g (10mg) DIGITAL Jewellery Weighing Scale, Gold & Silver ornaments Weight MEASURING MACHINE Weighing Scale {for research} |
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| 2691. |
On which the neucleous of hydrogen atom comprise? i 1protanii 1protan+2neutraniii 1neutran onlyiv 1electron onlytell me correct answer by explanation |
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Answer» ong>Answer: The nucleus of hydrogen consists of only a SINGLE proton (in the case of hydrogen-1 or protium), or it may also INCLUDE one or more neutrons (GIVING deuterium, tritium, and other isotopes). The electron is BOUND to the nucleus by the Coulomb force. Explanation: please mark as a BRILLIANT please please. ..... follow me also so be connected . |
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| 2692. |
(a) Phosphorous is stored in water. Can sodium be stored in it? Explain your answer giving a suitable reason. |
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Answer» ONG>Answer: no SODIUM cannot stored in water as it will react with water VIGOROUSLY and produce a large amount of heat |
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| 2693. |
WHAT IS THE VALENCY OF SODIUM. |
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| 2694. |
The pollutant present in air which causes retardation in photosynthetic activity of the plant is- Nitrogen dioxideCarbon monoxideSmogChloroflorocarbon |
| Answer» ONG>ANSWER: | |
| 2695. |
Sodium is stored in kerosene. why? |
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Answer» ONG>Answer:
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| 2696. |
. Why burning of fossil fuel is harmful for us? |
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Answer» ong>Answer: The BURNING of fossil fuels leads to the release of HARMFUL products into the environment. An increase in the consumption of fuel leads to harmful effects on the environment. FOLLOWING points will clearly depict these effects: Carbon fuels such as WOOD, coal, petroleum release unburnt carbon particles in the environment. These particles are very dangerous pollutants and cause respiratory diseases for example asthma. When fuels are incompletely burnt, they release carbon MONOXIDE gas into the ... |
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| 2697. |
by removing the hardness of water it can be used in homes factories explain with the help of example |
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Answer» hdneunejshrhdurjelhekdhfmfjf Explanation: hsjsoekdbfjrkreoeueehbrufkrgrormdgdkrbfyfnrhfjthfufjjrurjrrjrjrv,is gsoxvwocbpwhcodchdochcpechcwohcwixgeohcuqzgiwxgwixgwoxgqizfowgdqixgwoxfqodgpwss |
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| 2698. |
भारत में प्रसिद्ध काली मंदिर कहां पर है |
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Answer» ong>Answer: MARK me as brainlist |
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| 2700. |
How Many Major Products are formed? CD3-(C6H5)C=CH2 + HBr |
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Answer» ong>Answer: 2 PRODUCTS are FORMED = CH2 & HBr Explanation: PLEASE MARK BRAINLIEST ❤️❤️ |
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