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.
| 44901. |
How to prepare 200 ml of m/20 aqueous solution if na2co3. |
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Answer» 43.2 ML of a 1.23M H2SO4 SOLUTION completely reacts with a 75.0 ml Kindly MARK me as BRAINLEIST.. |
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| 44902. |
a solution is prepared from a,b ,c, and d mole fraction of a ,b and c are 0.1 ,0.2, 0.4 respectively then mole fraction of D is. ans ( would be a 0.2). please step by step solution |
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Answer» ole fraction of solution = 1Thus, for the BINARY solution; MOLE fraction of SOLUTE + mole fraction of solvent = 1Therefore mole fraction of solvent = 1 - 0.4 = 0.6Hope this helps, MARK as brainliest if it does ;) |
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| 44903. |
72% percent jal aur 92% percent alcohol ke mishran mein donon ke mol prabhaj ki ganana kijiye |
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Answer» to BIG EXPLANATION: |
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| 44904. |
Q1- Barium chloride and Sodium sulphate undergoes a precipitation reaction. 14.26g of Barium chloride was mixed with 12.74g of sodium sulphate. What will be the mass of precipitate if the mass of sodium chloride formed is 15.42? * |
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| 44905. |
2 compounds x and y tomic mass x=75 y = 16 combine to form an substance which give 75 % of x what is x |
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Answer» hclkxfkx hclydluflu yfkycyykc gxkgch gxkhckdkgd djsiyd tsjc FYD DGV. dhdb dhrbc rrhdg |
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| 44906. |
The normality of 4% NAOH is |
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Answer» 1 N Answer: The normality of 4% (w/v) solution of NaOH is 1 N. EXPLANATION: 4% (w/v) solution of NaOH means that 4 grams of NaOH in 100 mL of waterKindly MARK me as BRAINLIEST... |
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| 44907. |
How we will find the wave number of spectral line when electrons jumps from n2=5 to n1=3 |
| Answer» OH..the QUESTION is wowExplanation:very GOOD question | |
| 44908. |
Name the carbonyl that on reaction with Gignard reagent followed by acid hydrolysis give 1)primary reagent 2)secondary reagent 3)tertiary reagent |
| Answer» PRIMARY reagentExplanation:I HOPE it will HELP U | |
| 44909. |
9. In which of the following reactions hybridisation of underlined species is not changing?(1) NH3 + H+ =NH4+(2) BF3 +F-=BF4-(3) C2H2 + H2 → C2H6(4) All of these |
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Answer» Hence, the first and fourth reactions do not UNDERGO any change in the HYBRIDISATION of the UNDERLINED ATOM. |
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| 44910. |
(ptcl2) (ptcl4) iupac name |
| Answer» POTASSIUM tetrachloridetombstone DECA CHLORIDE EXPLANATION:pleazs MATK ss BRAINLIEST | |
| 44911. |
व्हाट शो मी द पीरियोडिक टेबल ऑफ एलिमेंट |
| Answer» MENDELEEV or MODERN PERIODIC table?TRIADS or OCTAVES?? | |
| 44912. |
What would be the IUPAC name and symbol for the elements with atomic number 101 to 120? |
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Answer» delevium (Unnilunium) Md* 102 Nobelium (Unnilbium) No* 103 Lawrencium (Unniltrium) Lr* 104 Unnilquadium Unq 105 Unnilpentium UNP 106 Unnilhexium Unh 107 Unnilseptium Uns 108 Unniloctium Uno 109 Unnilennium Une 110 Ununnilium Uun 111 Unununium Uuu 112 Ununbium Uub 113 Ununtrium Uut 114 Ununquadium Uuq 115 Ununpentium Uup 116 UNUNHEXIUM Uuh 117 Ununseptium Uus 118 Ununoctium Uuo 119 Ununennium Uue 120 Unbinilium UbnHope this helps you ;) |
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| 44913. |
Q. no. 1 Identify the following reactions (name them) and write down the mechanism for the each chemical reaction;a)(05)H3CBrOCH3H2CH₃CCHосн: + HBrCH3CH3+CH3OHb)(05)HECABrH3CSCH3+ CHgseBracetonec)NH,но.ОНHCINaNO2(05) |
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Answer» it is in PERIODIC tableExplanation:NOTE it IIT is in periodic table |
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| 44914. |
- Account for thethe facts 2r, Hf havingBimille co-valent wadilwell asionic radii |
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Answer» Atomic RADIUS; Ionic radius; Covalent radius · Metallic radius · Van der Waals radius · v · t · e. Ionic radius, rion, is the radius of a MONATOMIC ion in an ionic CRYSTAL structure. Although neither atoms nor ions have sharp BOUNDARIES, they are SOMETIMES ... To be consistent with Pauling's radii, Shannon has used a value of rion(O2−mark me as brainliest.. |
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| 44915. |
1.615g of anhydrous znso4 was placed in moist air. after few days it's mass was found to be 2.875g.what is the molecular formula of the hydrated salt? (atomic masses:and=65.5,s=32,O=16) |
| Answer» ZN =40.6%, S=19.8%,O=39.6% | |
| 44916. |
The dissolution of glucose in water is an_______ process . |
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Answer» endothermic process or REACTION.....Explanation:C6H12O6(s) ---> C6H12O6(aq) is an endothermic reaction. This MEANS that there is a net FLOW of energy from the water in ORDER to convert the solid form of GLUCOSE into the dissolved form....prefer to it child |
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| 44917. |
Difference between +E effect and -E effect with examples |
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Answer» In the positive electromeric effect the PI electrons of the MULTIPLE BOND are TRANSFERRED to that atom to which the attacking reagent is BONDED. When the pi electrons of the multiple bond are transferred to the atom to which the attacking reagent does not get attached is called the negative electromeric effect.Kindly mark me as brainliest...plzzz |
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| 44918. |
Na²SO⁴ is soluble in water where as BaSO⁴ is insoluble why? |
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Answer» Most alkali METAL SALTS are soluble in aqueous SOLUTION. Sulfates TEND to be soluble Explanation: |
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| 44919. |
A compound is always_ |
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Answer» ds are pure substances. They are the chemical combination of two or more atoms. COMPOUNDS are always homogeneous.plz mark as BRAINLIST and follow me |
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| 44920. |
निवडणूक आयोगाची नेमणूक कोण करते |
| Answer» TION:काम बढ़ाने करके हमरा फ्राई कर दिया प्रकार की रणवा चट्टर भरवाड के रण कर करके मार कर करा | |
| 44921. |
calculate the number of molecules of oxygen gas that occupies a volume of 224ml at 273k and 3atm pressure |
| Answer» TION:there is your ANSWER .it is HELPFUL to you | |
| 44922. |
Name the gas used in the preparation of nitrolim |
| Answer» CHLORINE GAS dudepls mark as brainlist if you can..thank u have a NICE day | |
| 44923. |
5g of sodium hydroxide in water such that 90 ml solution is prepared find the concentration of solutiondum hai to solve karo |
| Answer» AMOUNT of SODIUM hydroxide=5gTotal solution=amount of NaOh+amount of water=90mlTherefore,mass/volume PERCENTAGE concentration=5g/90ml*10050/9%=5.555% | |
| 44924. |
Which element is more electronegative? sodium or chlorine. Explain your answer. |
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Answer» In PERIOD 3, sodium with 11 protons is the least ELECTRONEGATIVE element, and chlorine with 17 protons is the most electronegative element.Explanation: |
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| 44925. |
I can't understand how can we balance a equation? |
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Answer» Balancing chemical equations involves the addition of stoichiometric coefficients to the reactants and products. This is important because a chemical equation must obey the law of conservation of mass and the law of constant proportions, i.e. the same number of atoms of each element must exist on the reactant side and the product side of the equation.Two quick and easy methods of balancing a chemical equation are discussed in this article. The first method is the traditional balancing method and the second one is the ALGEBRAIC balancing method.Chemical EquationA chemical equation is a symbolic representation of a chemical reaction in which the reactants and products are denoted by their respective chemical formulae.An example of a chemical equation is 2H2 + O2 → 2H2O which describes the reaction between hydrogen and oxygen to form waterThe reactant side is the part of the chemical equation to the left of the ‘→’ symbol WHEREAS the product side is the part to the right of the arrow symbol.Stoichiometric CoefficientA stoichiometric coefficient describes the total number of molecules of a chemical species that participate in a chemical reaction.It provides a ratio between the reacting species and the products formed in the reaction.In the reaction described by the equation CH4 + 2O2 → CO2 + 2H2O, the stoichiometric coefficient of O2 and H2O is 2 whereas that of CH4 and CO2 is 1.The total number of atoms of an element present in a species (in a balanced chemical equation) is equal to the product of the stoichiometric coefficient and the number of atoms of the element in one molecule of the species.For example, the total number of oxygen atoms in the reacting species ‘2O2’ is 4.While balancing chemical equations, stoichiometric coefficients are assigned in a manner that balances the total number of atoms of an element on the reactant and product side.The Traditional Balancing MethodThe first step that must be followed while balancing chemical equations is to obtain the complete UNBALANCED equation. In order to illustrate this method, the combustion reaction between propane and oxygen is taken as an example.Step 1The unbalanced equation must be obtained from the chemical formulae of the reactants and the products (if it is not already provided).The chemical formula of propane is C3H8. It burns with oxygen (O2) to form carbon dioxide (CO2) and water (H2O)The unbalanced chemical equation can be WRITTEN as C3H8 + O2 → CO2 + H2OStep 2The total number of atoms of each element on the reactant side and the product side must be compared. For this example, the number of atoms on each side can be tabulated as follows.Step 3Now, stoichiometric coefficients are added to molecules containing an element which has a different number of atoms in the reactant side and the product side.The coefficient must balance the number of atoms on each side.Generally, the stoichiometric coefficients are assigned to hydrogen and oxygen atoms last.Now, the number of atoms of the elements on the reactant and product side must be updated.It is important to note that the number of atoms of an element in one species must be obtained by multiplying the stoichiometric coefficient with the total number of atoms of that element present in 1 molecule of the species.For example, when the coefficient 3 is assigned to the CO2 molecule, the total number of oxygen atoms in CO2 becomes 6. In this example, the coefficient is first assigned to carbon, as tabulated below. Step 4Step 3 is repeated until all the number of atoms of the reacting elements are equal on the reactant and product side. In this example, hydrogen is balanced next. The chemical equation is transformed as follows.Now that the hydrogen atoms are balanced, the next element to be balanced is oxygen. There are 10 oxygen atoms on the product side, implying that the reactant side must also contain 10 oxygen atoms.Each O2 molecule contains 2 oxygen atoms. Therefore, the stoichiometric coefficient that must be assigned to the O2 molecule is 5. The updated chemical equation is tabulated below.Step 5Once all the individual elements are balanced, the total number of atoms of each element on the reactant and product side are compared once again.If there are no inequalities, the chemical equation is said to be balanced.In this example, every element now has an equal number of atoms in the reactant and product side.Therefore, the balanced chemical equation is C3H8 + 5O2 → 3CO2 + 4H2O. |
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| 44926. |
Explain the following: (i) Deltas are formed when river and sea water meet.(ii) Artificial rain is caused by spraying salt over clouds.(iii) Physisorption is multi-layered, while chemisorption is mono-layered |
| Answer» HOPE it HELPS youExplanation:all are TRUE . | |
| 44927. |
How do radioactive elements emit beta particle ( electron) although their nucleus does not have an electron. |
| Answer» ULD NUCLEUS CONTAIN ELECTRON ? | |
| 44928. |
2.1 Calculate the mole fraction of ethylene glycol (C2H6O2) in a soluti containing 20% of C2H6O2 by mass. |
| Answer» TION:there is your ANSWER ☝️☝️it HELPS you FRIEND. | |
| 44929. |
Explain homogeneous and heterogeneous |
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Answer» 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. "Homogeneous" and "heterogeneous" are not absolute TERMS, but are dependent on context and the size of the sample. In CHEMISTRY, if the volume of a homogeneous suspension is divided in half, the same amount of material is suspended in both halves of the substance. An example of a homogeneous mixture is air.In PHYSICAL chemistry and materials science this refers to substances and mixtures which are in a single PHASE. This is in contrast to a substance that is heterogeneous.Explanation:hey mate here is the best answer |
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| 44930. |
Write an equation to show the reaction between plaster of Paris and water. State the reason forkeeping POP in air tight containers. What is dead burnt POP? Write 3 uses of POP. |
| Answer» POP is used in making DECORATION accesorios,in hospital for repairing BROKEN bones,in making buildings etc...it's stored in air TIGHT container BCOZ it react with water | |
| 44931. |
Calulate the number of Atom ino.o5of water |
| Answer» NUMBER of ATOMS = 3* 1.67*10^21 = 5.02*10^21 atoms. | |
| 44932. |
Find most acidic hydrogenwith explanationplease |
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Answer» Protons P are amide hydrogens. The LONE PAIR electrons can be delocalized onto the adjacent carbonyl group to form a resonance-stabilized anion. THUS, protons p are the most acidic protons. |
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| 44933. |
find the molecular formula for the following compound with given percentage composition C-40% H-6.6% O-53.4% [molar mass is 90] |
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Answer» By using ELEMENT percentage composition - Atomic mass - Atomic ratioCarbon ⟶40%÷12= 1240 =3.33Hydrogen ⟶6.66%÷1= 16.66 =6.66Oxygen ⟶53.34%÷16= 1640 =3.33The least atomic ratio is 3.33.For simplest ratio, we get C:H:O = 1:2:1Empirical FORMULA = CH 2 O of mass 30 g.As molar mass = 60, Molecular formula = (CH 2 O) 2 =CH 3 COOHI hope it will HELP you |
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| 44934. |
Which is the heat of formation of NO :- Given N2 + 02 → 2NO – 24 kcal(1) - 12 kcal/mol (2) -24 kcal/mol(3) 12 kcal/mol (4) 24 kcal/mol |
| Answer» 4 OPTION is CORRECT ANSWER | |
| 44935. |
What is tyndall effect? Which kinds of solution show it? |
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Answer» tyndall effectColloids (ALSO known as colloidal solutions or colloidal systems) are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. The size of the suspended particles in a colloid can range from 1 to 1000 nanometres (10-9 metres). For a mixture to be CLASSIFIED as a colloid, its suspended particles must not settle (in the manner that the particles of suspensions settle at the BOTTOM of the container if left undisturbed). Colloidal solutions are known to exhibit the Tyndall Effect, which is a phenomenon in which beams of LIGHT incident on colloids are scattered due to the interactions between the light and the colloidal particles.Solutionsstarch solution show Tyndall effect as they are colloids |
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| 44936. |
When two liquids combine to form a solid is that a chemical change |
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Answer» When TWO LIQUIDS are MIXED together and a solid forms, the solid is a new substance that was FORMED during a chemical reaction between the two liquids.Explanation:hope I HELP you |
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| 44937. |
1 സ്കോർ വീതം. 1 മുതൽ 9 വരെയുള്ള ചോദ്യങ്ങളിൽ ഏതെങ്കിലും 7 എണ്ണത്തിന് ഉത്തരമെഴുതുക.(7 x 1 = 1)ശക്തിയേറിയ ഓക്സീകാരിയായി ഉപയോഗിക്കുന്ന നൈട്രജന്റെ ഓക്സോ ആസിഡ്1.ആണ്(a) HNO(c) N2O5(b) HNO(d) NOമയക്ക്മരുന്ന് . വിഭാഗത്തിലുള്ള2.നിന്നുംതാഴെ കെടുത്തിരിക്കുന്നവയിൽവേദനാസംഹാരി തിരഞ്ഞെടുക്കുക :(a) പെൻസിലിൻ(c) ആംപിസിലിൻ(b) ഹെറോയിൻ(d) ഒഫ്ലാക്സാസിൻശക്തി3.CH3COOH oogam”, കണക്കാക്കുന്നതിന് ഉപയോഗപ്രദമായ |
| Answer» RRY for that ANSWER it was my SISTER sorry very sorry please follow me | |
| 44938. |
Hypothesis: If the mystery food is tofu, then . . . because . . . |
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Answer» Hypothesis: If the mystery food is tofu, then it will REACT with the REACTANT that INDICATES the PRESENCE of a protein because tofu is primarily protein. ... The mystery food didn't react to any other food other than lipids. |
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| 44939. |
FeC2O4 + KMnO4 + H2SO4 = K2SO4 + MnSO4 + Fe(SO4)3 + H2O + CO2 balance by half reaction method |
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Answer» hhhh-hdddeeess |
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| 44940. |
4. Bohr models of atoms A, B, C are given (symbols are not real)a) Write the atomic number, mass number and electronicconfiguration of the atoms.? |
| Answer» UPLOAD the PHOTO of QUESTION pleasethen only we can do it | |
| 44941. |
Write the IUPAC name and symbol for the element having atomic number 101 to 118 |
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Answer» is will be HELPFUL for you |
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| 44942. |
What is mole? please explain |
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Answer» A MOLE is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, MOLECULES, ions, or others. The mole is a CONVENIENT unit to USE because of the GREAT number of atoms, molecules, or others in any substance.Explanation: |
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| 44943. |
Chemistry 118 elements and symbols show its total table |
| Answer» HOPE it's HELPFUL EXPLANATION:................ | |
| 44945. |
1) write the pistulates of K.MT |
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Answer» tion:The KINETIC-molecular theory of GASES can be stated as four postulates:A gas consists of MOLECULES in constant random motion.Gas molecules influence each other only by COLLISION; they exert no other forces on each other.All collisions between gas molecules are PERFECTLY elastic; all kinetic energy is conserved. |
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| 44946. |
What is the mole fraction of potassium nitrate in a saturated solution of potassium nitrate in water at 80.°C? |
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Answer» hhhhwfdfhhhhhhExplanation:bjdkxjdhdksiskfjhhhqcevjjwjejhwhehwhehehehehhhgwjefrxg |
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| 44947. |
guys if anyone has notes for mole fracton daltons theory and ionic bond plzz let me know as soon as possible |
| Answer» NOTE that the sum of the mole FRACTIONS of all the COMPONENTS in the mixture will ALWAYS be equal to 1. | |
| 44948. |
CHEMISTRY QUESTIONSPLEASE ANSWER AND GIVE EXPLANATION ASWELL. |
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Answer» Mass of the solution = mass of SOLUTE + mass of solvent Given that the mass percent of sodium SULPHATE solution is 20%. Let the mass of sodium sulphate which is required to prepare this solution be x grams. Given that the mass of water is 100 G. So, 20 = [x/(x + 100)] * 100 20/100 = [x/x + 100] 1/5 = x/x + 100 x + 100/5 = x x + 100 = 5x 5x - x = 100 4x = 100 x = 100/4 x = 25 Thus, 25g of sodium sulphate is required. |
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| 44949. |
B. How will you classify the materials on the basis of its appearance? |
| Answer» MATERIALS can be differentiated from each other on the basis of their looks. ... Whereas some other materials like graphite and wood do not appear SHINY and are generally known as non-lustrous materials. Objects like IRON, gold, and copper which are lustrous in nature are OFTEN considered as metals.Kindly mark me as brainliest...plzzzhope u like my ANSWER... | |
| 44950. |
How NO2 and ONF are isoelectronic |
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Answer» The Shape of O3 molecule is BENT. therefore, ONF and NO2 both are isoelectronic. 33.Kindly mark me as brainliest...plzzzhope u like my answer.. |
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