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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.
| 1951. |
0.6g of a solute is dissolved in 0.1 L of a solventwhich develops an osmotic pressure of 1.23 atmat 27°C. The molecular mass of the substance is:[a] 149.5[b] 120[c] 430[d] None of these |
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Answer» Answer: [a] 149.5 Explanation: |
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| 1952. |
Highest covalent character is found in CaF2CaCl2CaBr2CaI2 |
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Answer» Answer: Electronegativity which is the TENDENCY to attract shared PAIR of electrons TOWARDS itself is DIRECTLY related to the polarity or in other words we can say,more the electronegativity less is the covalent character. Hence CaF2 is more covalent comapared to CaCl2. Explanation: |
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| 1953. |
(a) Calculate the concentration of chloride ions in 100 mL of 0.01M AlCl3 solution. (b) What will be the change in concentration of chloride ions if the solution is diluted by adding 100 mL of water? |
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Answer» ₹^%#|/*×;:|₹^*/:'~~^+;'||%&×/:|$&/ Explanation: |
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| 1954. |
(1) the energy associated with the first orbit in the hydrogen atom is -2.18 × 10^-18 J/atom. whT us the energy associated qith yhe fifth orbit ?(2) Calculate the radius of Bohr's fifth orbit for hydrogen atom. |
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Answer» Answer: Mass (m) = 5 KG Momentum (p) = 10 Kg m/s Force applied (F)= 0.2N for t= 10 seconds Solution: Momentum (p)=m∗u=10Kgm/s (Here u is the VELOCITY at which the object is moving) p=5∗u=10 u=105=2m/s F=m∗a=0.2N ( When force is applied to the moving object then object will accelerate at 'a') F=5∗a=0.2 a=0.25=0.04m∗s−2 Now, using Newton's laws of motion we will FIND the new velocity (v) of the object v=u+a∗t v=2+0.04∗10=2.4m∗s−1 Change in KINETIC energy is ΔK.E=12m∗v2−12m∗u2 ΔK.E=12∗m(v2−u2) ΔK.E=12∗5∗(2.42−22) ΔK.E=0.5∗5∗(5.76−4)=4.4J Increase in kinetic energy will be 4.4 joules. |
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| 1955. |
Write the following reaction with equation-(a) Hoffmann Bromamide reaction.(b) Carbylamine reaction. |
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Answer» hfhdhsvdgsksbdhchdhdhxhhdhdhxhdhxgx |
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| 1956. |
Explain the triad rule with a proper example |
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Answer» Answer: Dobereiner stated in his LAW of TRIADS that the arithmetic mean of the atomic masses of the first and third element in a TRIAD would be approximately equal to the atomic mass of the SECOND element in that triad....... Explanation: HOPE it help you........❤️❤️❤️❤️❤️ |
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| 1957. |
How will you prepare the following -(a) Ethene from ethanol.(b) Cyclohexane from benzene.(c) Methane from sodium acetate.(d) Ethane from ethene. |
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Answer» a.using evaporation all these can be SEPARATED by THEIRR boiling pount Explanation: i hope it helps you,please MARK it as brainliest ALSO follow me....... .. |
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| 1958. |
How will you prepare the following- (a) Ethene from ethanol(b) Cyclohexane from benzene.(c) Methane from sodium acetate(d) Ethane from ethene. |
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Answer» (a) Ethanol can be dehydrated to give Ethene by heating it with an excess of concentrated sulphuric acid at 170degrees Celsius (b) first of all, benzene is converted in a hydrogenation step to cyclohexane(that present in hydrocarbon MIXUTURE (c)sodiumacetate on heating with dry SIDE LIME (NaOh+CaO) gives Methane (d)Ethane is a molecule with FORMULA Ch3-Ch3 and that ethene is form CH2=CH2 |
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| 1959. |
28. वह5देने(a)नहीं बचता। उसकेपास पौधों की(a) 3601(b) 361029. वसंख्या थी(d) 361(30.19. एक माली को पौधों की मिश्रित संख्या लगानी थी। पहले उसने प्रत्येक मेंबार एक पौधा बच जाता था। एक लाइन में 13 पौधे लगाने पर कोई पौधा20. यदि किसी कक्षा के विद्यार्थियों को 6 या 8 या 10 के पूरे-पूरे समूहों मेंरखा जा सके, तो कक्षा के विद्यार्थियों की निम्नतम संख्या होगी21. (72x + 243x),(2413-54x) और (18x+ + 15x3-18x2) का22. यदि (x + px +q) तथा (5x2 -3px -15q) का म.स. (x -3) हो,न्यूनतम(c) 468(c) 180(b)2x2x + 3)(d) 3x (2x + 3)(a) 60(b) 120(d) 240आँगन में फर्श पर समान माप के वर्गाकार टुकड़े लगवाने हैं। आँगन मेंकेमान होंगे(b)5, -6(c)-3, -63, एक फर्श की लम्बाई (4) मी तथा चौड़ाई (ts + x2 + x) मी है।म.स. होगा(a)x (2x + 3)(c) 4x (x + 3)31.232तो तथा(a)-5,6Pq(d) 5,63लगाने वाले टुकड़ों की कम-से-कम संख्या होगी(a)x -1(b)x(c)x+1(d) x (x2 + x + 1)पद (x3 - x2 - 13x – 3), (x2 - 6x - 27) तथा (x2 + 21x + 54)ा महत्तम समापवर्तक है(x+ 1)(x -5)(x + 3)(b)(x + 1)(x + 3)(d) इनमें से कोई नहीं |
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| 1960. |
Explain the trial rule with a proper example |
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Answer» . . THANK you.. |
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| 1962. |
Molecular mass of compound is 249.5 . calculate the molecular formula of compound having Cu = 25.46 , S= 12.82 , O = 26.25 H2O = 36.07. [ Cu= 63.5, S= 32 O= 16 , H2O = 18]answer please |
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Answer» yfydyd hcufjddudsuseisiieiediideiususidudyfgfhfuguguguguguigigugiiyiyuuiiy |
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| 1963. |
Koh+ch3cooh=ch3cook+h2o balance ir |
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Answer» Bvdsxcvbb Explanation: Vgdrfvb bbvcfg |
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| 1964. |
What would happen if the electron lost by carbon is gained by oxygen? |
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Answer» Explanation: They ALWAYS occur together. ... both carbon and HYDROGEN are oxidized (GAIN oxygen). ... oxidation of oxygen is easier to see when you describe oxidation as the losing of electrons. |
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| 1965. |
Differentiate between atomic mass unit and average atomic mass. write their mathematical formula as well.write in the form of a table. It is a long question of 5 marks.the best answer will be marked as brainliestand for answering this question you will get 15 points instead of 10. |
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| 1966. |
Identify the type of reaction when Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. |
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Answer» Answer: Identify the TYPE of REACTION when Barium CHLORIDE reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. |
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| 1967. |
A student mixed a small number of iron filings and sulphur powder in a dish. He could not affect the separation by simple hand-picking. Which liquid will you suggest to affect the separation? |
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Answer» Answer: He can separate the solution by the USE of a magnet or an electromagnet Explanation: as we know about the PROPERTY of MAGNETS to attract metals THEREFORE, a magnet will pick up all the iron FILLINGS and hence, the solution is separated easily hopefully it helps ya mark as brainliest peace ✌✌✌✌ |
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| 1969. |
1. How will you determine the standard electrodepotential of system /Mg.doflori |
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Answer» huueueuuusuwiuwhsuuudufh Explanation: vvvvbb ddtuhPz, |
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| 1970. |
Carbon, a member of group 14, forms a large number of carboncompounds estimated to be about three million. Why is this property notexhibited by other elements of this group ? Explain. |
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Answer» |
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| 1971. |
Write the structure of inter halogen compound and ions of IF3 |
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Answer» Answer: An interhalogen COMPOUND is a molecule which contains two or more different halogen atoms (FLUORINE, chlorine, bromine, iodine, or astatine) and no atoms of elements from any other group. ... Their FORMULAE are generally XYn, where n = 1, 3, 5 or 7, and X is the less ELECTRONEGATIVE of the two halogens. |
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| 1972. |
How many chapters are in physical chemistry in class 11 with name |
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Answer» Answer: There are 14 CHAPTERS (both parts) on chemistry in class 11th The 1ST part consists 7 chapters including some basic concepts of chemistry MAY IT HELP U |
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| 1973. |
O. On the basis of following given standard electrodepotentials, arrange the metals in increasing order ofreducing capacity :K+/K=-2.93 V, Ag+ /Ag=0.80 VHg++ /Hg = 0.79 VMg2+ /Mg =-2.37 V, Cr3+ /Cr=-0.74 V |
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Answer» Answer: REDUCTION POTENTIAL directily proportional to negative value of reducing power.so more negative value of reducing power BEST is reduction potential. order will be: K>MG>Cr>Hg>Ag Explanation: this may HELP u.follow me |
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| 1974. |
Which chapters are in organic,inorganic and physical chemistry in class 11 with name? |
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Answer» Answer: HALOALKANES and Haloarenes. Alcohols, Phenols and Ethers. Aldehydes, Ketones and Carboxylic acids. Amines. Biomolecules. Polymer. Chemistry in EVERYDAY Life. |
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| 1975. |
Atom is>massof theof thewholepassent the whole of the mass oh the atom is present in the centree of the atom |
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Answer» atom WHOLE MASS is PRESENT into centre at NUCLEUS because it electron have very negligible mass and all the mass of atom depends UPON proton and neutron |
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| 1976. |
ब्यूरा - S रबर का एलकॉक है |
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Answer»
ब्यूटा-s =. nch²=ch²-ch=ch²+6c6h-ch=ch²<<<<>>{ ch²-ch=ch-ch²-ch-(benjine)-ch²}ब्यूटाडाईन-स्टारीन सहबहुलक
your answer .
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| 1977. |
多名mention the relation between 'a'(edge of unit length) and 'r' (radius of atom) in BCC |
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Answer» uroyidismijhyauguepel8etmuuxlg |
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| 1978. |
How many chapters are in organic,inorganic and physical chemistry with name? |
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Answer» Answer: Explanation: Physical Chemistry has five chapters and is of 23 MARKS, Organic Chemistry has four chapters of 19 marks and Inorganic Chemistry has seven chapters of 28 marks. ... TimesPoints. S. No. Chapter Marks 1 Haloalkanes and Haloarenes 4 2 Alcohols, Phenols and Ethers 4 3 Aldehydes, KETONES and Carboxylic ACIDS 6 4 Amines 4 |
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| 1979. |
Give steps of chromatography used to separate a mixture of two inks. Also give few precautions. |
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Answer» Ink chromatography, the process of separating ink, is a simple science experiment commonly found in K-12 science CURRICULA. It can be useful in identifying unknown solutions as well. Through the submersion of chromatography paper into water, any sample of ink can be separated into its RESPECTIVE cyan, magenta, and yellow components. The water causes the ink MOLECULES to "travel" up the paper strip. Depending on the mass of the molecule, various pigments will travel faster than others, causing the separation. |
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| 1980. |
What is most critical factor to distinguish hot rolling and cold rolling? 1)Final grain size 2)Segregation of S along grain boundary 3)Recrystallization temperature 4)C content in the slab. |
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Answer» Answer: MARK as BRAINLIEST plz Explanation: Option C |
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| 1981. |
Q If 15 gmof urea is added to 75 gm of water thenfind out the boiling point of the resulting solution? |
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Answer» Answer: 0.513 Explanation: |
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| 1982. |
Mass percentage composition of O in urea |
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Answer» ans. to know the percent COMPOSITION of Carbon and OXYGEN . We will divide their weight with the total weight of CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). % O = 32.00/44.01 =0.7271 =72.71 %O in CO2. |
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| 1983. |
206. The conductivity of 0.025 mol L- methanoic acid is46.1 s cm2 mol-!. Calculate the degree ofdissociation and dissociation constant. (Given, a349.6 S cmmol-= 54.6 S cm mol-(HCOO)020 |
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Answer» Explanation: Answer:Given that λ0(H+)= 349.6 S cm2 mol–1 λ0(HCOO–) = 54.6 S cm2 mol–1 Concentration ,C = 0.025 mol L-1 λ(HCOOH) = 46.1 S cm2 mol−1 use formula λ°(HCOOH) = λ0(H+) + λ0(HCOO–) plug the VALUES we get λ°(HCOOH) = 0.349.6 + 54.6 =404.2 S cm2 mol−1 Formula of degree of dissociation: ά = λ°(HCOOH)/ λ°(HCOOH) ά = 46.1 / 404.2 ά = 0.114 Formula of dissociation constant: K = (c ά2)/(1 – ά) Plug the values we get
K = 3.67 × 10–4 mol per liter |
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| 1984. |
9. The average osmotic pressure of human blood is 7.8 bar at37°C. What is the concentration of an aqueous NaCl solutionthat could be used in the blood stream.(a) 0.16 mol L(b) 0.32 mol(c) 0.60 mol/L(d) 0.45 mol |
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Answer» Answer: SOLUTION :- OPTION A is correct Nacl should lie isotonic with blood π blood
=C Nacl
RT×i 7.8=C×0.0821×310×2 C=0.153mole −1
The concentration of on aqueous Nacl solution that is used in blood stream is 0.15 mol/L |
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| 1985. |
Give chemical name and formula off Bleaching powder, pop, washing soda |
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Answer» Explanation: CaOCl2 Ans: Bleaching Powder's chemical FORMULA is CaOCl2 and is called Calcium Oxychloride. Na2CO3 Sodium carbonate/Formula Washing soda is a chemical COMPOUND with the formula Na2CO3, known as sodium carbonate The chemical name of plaster of Paris is calcium sulphate HEMIHYDRATE because half-molecule of WATER is attached with calcium sulphate. The chemical formula of plaster of Paris is CaSO4. 1/2H2O |
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| 1986. |
व्हाट इज द फुल फॉर्म ऑफ बीएसएफ |
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| 1987. |
4) Grine the equations forthefollowingconversionsanse→ ZnCO₃B Zn(NO3)2CtoZnO• ZnC0Hz |
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| 1988. |
Two tensile force each of magnitude f are acting at a point perpendicularto each other then their resultant force will beOFO VEO ZeroO V2F |
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Answer» √2F Explanation: |
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| 1989. |
A 15 kg ball takes 5 sec to strike the ground from rest find the height from which it was dropped |
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Answer» use this Explanation: S= ut -1/2gt2 as u = 0 the s = h h = 1/2 gt2 h =1/2 ×10×5×5 h= 125 m when body falls under FREE FALL (u=0) MASS doesn't effect it . MARK as brain list |
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| 1990. |
Which one is not produced by continuous casting process? 1)Ingot 2)Billet 3)Bloom 4)Slab |
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Answer» Answer: Continuous casting, also CALLED strand casting, is the process whereby molten METAL is solidified into a "semifinished" billet, bloom, or slab for subsequent rolling in the FINISHING mills. Prior to the INTRODUCTION of continuous casting in the 1950s, STEEL was poured into stationary molds to form ingots. Explanation: hope this helps please follow |
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| 1991. |
The saturation temperature for 20.7g of CuSO4 soluble in water is |
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Answer» Answer: The SATURATION temperature for 20.7g of CUSO4 soluble in WATER is "100C".. |
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| 1992. |
Please help me to find out the product of the above problem. |
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Answer» url palakkad to the we can do it is not CLEAR on what are the best of luck to you to the we can do it is not clear ☺️ I am full I am full of KHAJURAHO in MADHYA Pradesh scholarship portal |
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| 1993. |
What is the atomicity of hydrogen element? *a) Diatomicb)Monoatomicc) Tetra atomicd) Polyatomic |
Answer» polyatomicExplanation: |
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| 1994. |
Which electrode is negatively charged |
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Answer» Answer: CATHODEThe cathode is the NEGATIVELY charged ELECTRODE. The cathode attracts cations or positive CHARGE. The cathode is the source of electrons or an electron DONOR. |
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| 1996. |
Which reaction take place at each electrode |
Answer»
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| 1997. |
What is Hz0. With full form....Give correct answer only...☺ |
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Answer» Answer: Herpes ZOSTER OPTHALMIC US. ☺️☺️❤️. Thanks. |
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| 1998. |
Hello ! Guys here's Ur Question ;WARNING : ❌ Don't spam❌pls...Q . What happens when metallic oxide reacts with water ? Briefly explanation with example ..If don't know plz Don't ans...➕ Don't forget to follow➕me. |
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Answer» Answer: NONMETALS also FORM covalent oxides, which are usually molecular in character. ... Ionic metal oxides react with water to give hydroxides (COMPOUNDS containing the OH− ion) and resultant basic solutions, whereas most NONMETAL oxides react with water to form acids and resultant acidic solutions (see the table). Explanation: plzzzzzzzzzzz mark me brainliyest |
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| 1999. |
Write an equation for the calculation of density of a crystal from its structure? |
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Answer» Calculations of a Unit Cell Density = M a s s V o L U m e \frac{Mass}{Volume} VolumeMass. D = M a s s o f U n i t C e l l V o l u m e o f U n i t C e l l \frac{Mass of Unit Cell}{Volume of Unit Cell} VolumeofUnitCellMassofUnitCell. |
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| 2000. |
A volatile acid prepared by H2SO4 with nitre |
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Answer» Answer:
Explanation: ✌️please mark as brainliest answer✌️ |
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