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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Q14 Classifical Isosters have----------steric and----------- electronic properties.[A] Same ,Different[B] Same, Same[C] Different, Same[D]Different, Different |
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Answer» a different Explanation: this is very COMPLICATED ANS |
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| 2. |
Why are we able to drink hot tea from sauce more easily than a cup |
Answer» ☯ AnSwEr :We are ABLE to drink hot tea from saucer more EASILY than a cup because a cup has smaller AREA then the plate & plate has also larger area then the cup. The Surface is directly proportional to the heat. ★ Similar Questions :→ Why water is cool inside the earthen pot ? Water is cool inside the earthen pot beacause earthen pot has many pores through which the water is evaporated. The heat energy of water is utilised in the EVAPORATION process. → Sponge is solid then why it's shape changes on pressing it ? Sponge is in solid state but on pressing it the shape of sponge changes and on releasing it shape again came. This is because sponge has small pores inside it on pressing tge sponge air got released from it's pores. So, it's shape got CHANGED. |
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| 3. |
Arrange the following in the increasing order of-iron nail,kerosene,oxygen gas1 force of attraction2 density(Also give reason) |
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Answer» Answer: (i) Force of attraction: oxygen gas < KEROSENE IRON nail (ii) Intermolecular SPACE : Iron nail Kerosene < Oxygen gas (b) (i) RIGIDITY : It is the property of matter to maintain shape against external force. (ii) Compressibility : It is the property of matter by VIRTUE of which molecules of matter are brought closer to each other. (iii)Diffusion : The inter mixing of the particles of matter is known as diffusion. Explanation: hope it helps |
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| 4. |
Tryptophan is called essential aminoacid becausea. It contains aromatic nucleus.b. It is present in all the human proteins.c. It cannot be synthesised by human body.d. It is essential constituent of enzymes. |
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Answer» Answer: tryptophan is called ESSENTIAL acid bcz.....
hope it HELP.... mark me as a brainliest. |
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| 5. |
1.55g of silver is deposited in one cellcontaining silver nitrate solution calculate themass of zinc deposited in other cell havingzinc sulphate solution in series with silver nitratemolar masses of zinc and Ag are 65.4 and 108 g permole respectively. |
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Answer» we know by FARADAY's second law, W1/E1 = W2/E2 therefore, 1.55/108 = W/32.7 (since E= molarmass/valancy .. ECU= 65.4/2) SOLVING, W = 46 |
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| 6. |
What are the isomers of dibromobis(diethylamine)cobalt(lll) cloride |
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Answer» cis-Dichlorobis(ethylenediamine)cobalt(III) chloride is a SALT with the formula [CoCl2(EN)2]Cl (en = ethylenediamine). The salt consists of a cationic coordination complexand a chloride anion. It is a violet diamagnetic solid that is soluble in water. One chloride ion in this salt readily undergoes ion EXCHANGE but the two other chlorides are less reactive, being bound to the METAL center.
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| 8. |
Weight of oxygen which combine with fixed weight of carbon are in the ratio of |
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Answer» 3:2 Explanation: |
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| 9. |
Explain hydrate isomerism with example |
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Answer» Explanation: Hydrate Isomers: Isomers of crystalline complexes that differ in WHETHER water is present inside or outside the coordination SPHERE. Examples: [Cr(H2O)6]CL3 is violet COLORED, [CRCL(H2O)5]Cl2. H2O is blue-green, and [CrCl2(H2O)4]Cl |
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| 10. |
Sodium and potessium Can bestored in water explain why ofWhy not? |
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Answer» Explanation: SODIUM and potassium are very REACTIVE metals and readily CATCHES fire in the air. They cannot be kept in WATER as they react exothermically in water. Therefore they are stored in KEROSENE. |
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| 11. |
Write a word equation for the reaction between carbon and oxygen |
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| 12. |
Plzz help assignment question✨✨1.55g of silver is deposited in one cellcontaining silver nitrate solution calculate themass of zinc deposited in other cell havingzinc sulphate solution in series with silver nitratemolar masses of zinc and Ag are 65.4 and 108 g permole respectively.✨✨ |
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Answer» we know by faraday's second law, W1/E1 = W2/E2 therefore, 1.55/108 = W/32.7 (SINCE E= molarmass/valancy .. ECu= 65.4/2) |
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| 13. |
Which of the following does not applyto CH2NH2 - COOHa. Neutral amino acidb. L - amino acidc. Exists as zwitter iond. Natural amino acid |
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Answer» Explanation: hope it HELPS ..... |
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| 14. |
A student took 2-3 g of a substance X in a glass beaker & poured waterover it slowly. He observed bubbles along with hissing noise. The beakerbecomes quite hot. Identify X. What type of reaction is it? |
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Answer» CHEMICAL reaction Explanation: |
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| 15. |
The partial pressure of co2 in air saturated with water vapours at 25°C and 1 atm is 3.04*10^-4 atm. Henry's constant for CO2 in water is 2.3*10^-2 M/atm and for carbonic acid Pka is 6.37. The Ph of normal (CO2 mixed) rain water will be |
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Answer» ANSWER:about 5.6 Explanation: |
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| 16. |
Open chain formula of glucose doesnot containa. Formyl groupb. Anomeric hydroxyl groupc. Primary hydroxyl groupd. Secondary hydroxyl group |
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Answer» formyl GROUP. Explanation: open chain of FORMULA of GLUCOSE dorles not cointain formyl group. |
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| 17. |
Give one example for polar covalent bond and draw its structure |
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Answer» Explanation: The OXYGEN "side" of the molecule has a net NEGATIVE charge, while the TWO HYDROGEN atoms (on the other "side") have a net positive charge. Hydrogen fluoride (HF) is another example of a molecule that has a polar covalent bond the pic is not fitting sorry |
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| 19. |
An aqueous solution of sodium chloride is neutral but an aqueoussolution of sodium is basic. |
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Answer» NaCl is SALT of strong ACID HCl and strong BASE NaOH. It does not undergo hydrolysis as there is no reaction between ions of salt NaCl with water.Aqueous solution of NaCl contains equal number of H+ and OH- ions,HENCE it is neutral in nature. On other hand,sodium carbonate is a salt of weak acid H₂CO₃ and strong base NaOH. When it is dissolved in water,it undergo ANIONIC hydrolysis.Thus salt solution contains OH- ions. Hence aqueous solution of sodium carbonate is basic in nature. mark as brainlist |
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| 20. |
For an optically active compound specific rotation depends on a) Length of polar meter tube b) Concentration of solution c) Polar meter instrument d) Nature of the compound |
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Answer» Answer: Definition. The CRC Handbook of Chemistry and Physics defines specific rotation as: For an OPTICALLY active substance, defined by [α]θλ = α/γl, where α is the angle through which plane polarized LIGHT is rotated by a SOLUTION of mass concentration γ and path LENGTH l. |
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| 21. |
Would a larger mirror in a bathroom produce more condensation? Why? |
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Answer» Answer: yes because in BATHROOM there are MANY drops of water when they reflect with LIGHT the CLEAR the image as we Senn that. bathroom MIRROR image is nice |
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| 22. |
Write one uses of hydrogen gases |
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Answer» ong>Answer: Nearly all of the hydrogen consumed in the United States is USED by industry for REFINING petroleum, treating METALS, producing fertilizer, and processing foods. U.S. petroleum refineries use hydrogen to lower the sulfur content of FUELS. |
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| 23. |
Moliculer mass of K2Cr2O7 |
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Answer» ONG>Answer: 294.185 g/mol
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| 24. |
You serve a volley ball with a mass of 2.1kg. The ball leaves your hand at 30m/s. |
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Answer» ONG>Answer: I HOPE this will HELP you...... plzz mark me as BRAINLIEST and plzzz follow me...... |
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| 25. |
A metal M forms a compound M2 HPO4. The formula of the metal sulphate is: |
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Answer» ONG>Answer: M2 (SO4)3 Explanation: If MPO4 exists it means that M has VALENCY 3+ Thus it's METAL sulphate has the formula M2(SO4)3..... hope this will help youuu |
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| 26. |
Calculate the energy of 4th 5th levels hydrogen atom |
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Answer» ong>Answer: 4th energy level=-0.85 eV 5th energy level=-0.544eV
Explanation: |
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| 27. |
How is toulene converted to benzene |
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Answer» ONG>Answer: Originally Answered: Organic Chemistry: How do you convert toluene into benzene? 1) Oxidize it to benzoic acid using potassium permanganate. 2) Heat the benzoic acid with soda-lime. You will get FIRST SODIUM benzoate, PhCOONa, and then benzene: PhCOONa + NaOH -----> PhH + Na2CO3. Hope it helps U... Please mark me brainlist... |
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| 28. |
Classify complexometric titration and explain each in detail |
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Answer» ONG>ANSWER: byeeeeeeeeeeeee please FOLLOW me |
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| 29. |
Men and women are rarely considered equal |
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Answer» ong>Answer: |
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| 30. |
What will be IUPAC name |
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Answer» ong>ANSWER: I hope this is helpful Explanation: INTERNATIONAL Union of Pure and Applied CHEMISTRY |
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| 31. |
Water has atmospheric nature, explain |
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Answer» ong>Answer: Water is AMPHOTERIC in nature i.e. it can ACT as an acid as well as a BASE. In the BRONSTED sense it acts as an acid with NH3 and a base with H2S. |
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| 32. |
How to convert propan 1 ol to propan 2 ol |
| Answer» ONG>EXPLANATION: | |
| 34. |
What are iso-electronic ions |
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Answer» ong>Isoelectronicrefers to TWO ATOMS,ions or molecules that have the same ELECTRONIC structureand same NUMBER of valence electrons. The term means "equal electric" or "equal charge". Forexample: Isoelectronic ions. number of electrons. |
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| 35. |
21. Write note on limitations of Bohr's model of an atom |
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Answer» ong>Answer: LIMITATIONS of BOHR's Model of an ATOM: Bohr's model of an atom failed to explain the Zeeman Effect (effect of MAGNETIC field on the spectra of atoms). It also failed to explain the Stark effect (effect of electric field on the spectra of atoms). ... It could not explain the spectra obtained from larger atoms. |
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| 36. |
Find the number of electrons in each of the following. 1. Al3+ 2. O2–3. Ca2+ 4. F– |
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Answer» ong>Answer: Hope you LIKE the answer |
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| 38. |
Why should water be called a compound? Please give me correct answer fast |
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Answer» ong>Answer: A compound is a substance that is composed from two or more DIFFERENT elements. Water (H2O), table salt (NaCl), carbon dioxide (CO2), methane (CH4) and chlorophyll (C55H72O5N4Mg) are a few examples of compounds. They are compounds because they each contain more than one kind of element. Things like nitrogen gas (N2) and buckminsterfullerene (C60) are not compounds since they only contains one kind of element (nitrogen gas contains only nitrogen and buckminsterfullerene contains only carbon). Whether something is a molecule or not DEPENDS on the type of bond that is formed when its atoms join together. In general, electrons can be shared between atoms (a molecular bond) or electrons can be completely REMOVED from one atom and given to another (an ionic bond). Molecules have molecular bonds. Nitrogen gas (N2) is a molecule because the bond between the nitrogen atoms is a molecular bond. Water (H2O) is a molecular compound because it is a substance made from more than one kind of element that is HELD together with molecular bonds. Salt (NaCl) is an ionic compound because it is a substance made from more than one kind of element that is held together with ionic bonds Explanation: please please please please mark as brainlist |
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| 39. |
Which is the first member of noble gas family? |
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Answer» > ʀᴀᴅᴏɴ ᴡᴀs ғɪʀsᴛ ɪᴅᴇɴᴛɪғɪᴇᴅ ɪɴ 1900 ʙʏ ɢᴇʀᴍᴀɴ ᴄʜᴇᴍɪsᴛ ғʀɪᴇᴅʀɪᴄʜ ᴇ. ᴅᴏʀɴ; ɪᴛ ᴡᴀs ᴇsᴛᴀʙʟɪsʜᴇᴅ ᴀs ᴀ ᴍᴇᴍʙᴇʀ ᴏғ ᴛʜᴇ ɴᴏʙʟᴇ-ɢᴀs ɢʀᴏᴜᴘ ɪɴ 1904. ʀᴀʏʟᴇɪɢʜ ᴀɴᴅ ʀᴀᴍsᴀʏ ᴡᴏɴ ɴᴏʙᴇʟ ᴘʀɪᴢᴇs ɪɴ 1904 ғᴏʀ ᴛʜᴇɪʀ ᴡᴏʀᴋ
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| 40. |
What is home scatter of hydrogen |
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Answer» ong>Answer: Hydrogen is a very useful element. It is used to make ammonia for fertilizers, refining metals, and methanol for making artificial MATERIAL LIKE plastics. Hydrogen is also used as a rocket fuel where LIQUID hydrogen is combined with liquid oxygen to PRODUCE a powerful EXPLOSION. |
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| 41. |
name the probable cation responsible for its coloured salt solution .1)yellowish brown coloured solutio.2)pale blue coloured solution3)light green 4)chalky white5)white gelatine ppt |
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Answer» ONG>Answer: 1) FE 3+ 2) CU 2+ 3) Cu 2+ 4) PB 2+ 5)Zn 2+ |
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| 42. |
give an example of each of the chemical changes A photochemical reaction involving silver salt and water |
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Answer» ong>Answer: Reactions in in which LIGHT energy is absorbed to carry out the reaction is called photichemical reaction. Silver chloride decomposes in presence of UV light to metallic silver & chlorine gas. During PHOTOSYNTHESIS, carbon dioxide & water are CONVERTED to glucose & oxygen in presence of sunlight. |
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| 43. |
CHEMISTRY When 0.1 g of hydrogen is burnt in oxygen, the number of water molecules produced isequal to(a) 6.02 x 1023 (b) 3,01 x 1023 (c) 3,01 x 10 (d) 6.02 x 1022How many moles of electrons weigh one kilogram?16.023(a) 6.02 x 10(b)-x1039.1089.10813233--x10%1(d)-*10*9.108x6.0233.Number of atom in 558.5 g Fe (At. wt. of Fe = 55.85 g mol-'), is(a) twice that in 60 g carbon (b) 6.023 x 1022(C) half that in 8 g He(d) 558.5 x 6.023 x 102316 34 -0.56 g of a gas occupies 80 cm' at NTP, then its molecular mass is(a) 4.8 (b) 44.8 © 2(d) 22.45.The maximum number of molecules will be present in(a) 16 g of NO, gas (b) 16 g of O, gas (©) 7 g of N, gas (d) 2 g of H, gasWhich has maximum number of atoms?(a) 24 g C(12) (6) 56 g of Fe (56) (c) 27 g of AI (27) (d) 108 g of Ag (108)6.7.Which of the following statements is dependent on temperature ?(a) Molality (b) Molarity (C) Mole fraction (d) Weight percentage3536-313839yoWhich of the following constitute 0.1 g mole?(a) 6.023 x 1022 molecules of benzene (b) 0.14 g of N, gasC) 2.24 litres of Co, at STP. (d) 0.40 g of He gasWhich of the following are elements ?(a) Diamond (b) Graphite (c) Fools gold (d)A&B9.10.Which of the following are mixtures ?(a) Gasoline (b) Steel (c) Sodium (d)A&BWhich of the following is/are mixture ?(a) lodised salt (b) Steam (c) Rb (d) Fr |
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Answer» ong>ANSWER: that's tooo LONG too ans.....ask these questions in BITS and pieces...... |
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| 44. |
Diacidic alkali -(a) Ca(OH)2(b) Mg3N2(c) NaOH (d) Al(OH)3 |
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Answer» ong>Answer: Is calcium hydroxide acidic or basic? Calcium hydroxide, also known as slaked LIME (with the chemical FORMULA Ca(OH)2) is a source of hydroxide ions when dissolved in aqueous solutions. Therefore, this compound is a BASE. DUE to electrolyte dissociation, this compound liberates OH- ions. Explanation: plz mark as brainlist |
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| 45. |
Distinguish between Concentrated and diluted solutions.Thanks de do kanjuso..xD |
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Answer» ong>Answer: The terms DILUTE solution and concentrated solutions are vague as they LACK quantitative preciseness. The MAIN difference between the dilute solution and concentrated solution is that dilute solution contains less solute and the concentrated solution contains more solute. |
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| 46. |
What is acid rain? don't copy from Google. |
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Answer» ong>Explanation: Acid rain, or acid deposition, is a broad TERM that includes any FORM of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground from the ATMOSPHERE in WET or dry FORMS. This can include rain, snow, fog, hail or even dust that is acidic. |
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| 47. |
Hey how to delete or help someone |
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Answer» ong>Answer: see, if u wanna delete that INBOX CHAT then BLOCK his / her id.... if u wanna delete the answer which he / she GIVES then report that answer.... ok sis ?? -ABHI |
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| 48. |
Why is the formula of hydrochloric acid not HCl2 and that of calcium chloride is not CaCl? |
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Answer» ong>ANSWER: BCOZ CALCIUM has a VALENCY of 2 while Hydrogen has only one. |
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| 49. |
3. When barium hydroxide is added to hydrochloric acid, a white-coloured barium chloride is formed. Write a balanced chemical equation for thereaction? |
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Answer» ONG>ANSWER: Explanation: |
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