52639 + Interview Questions in Secondary School in Chemistry

1.	Draw the Lewis structure and find out the formal charge a)CO2b)CO3²-c)SO4²-d)H3O+e)NF3
Answer» c is the RIGHT answerExplanation:HOPE it HELP you and PLEASE make my answer brainlist

Discussion

2.	Which of the following undergo chemical reactions? Describe the reactions and write their formula 1. Iron and copper sulphate 2. Copper and ferrous sulphate 3. Magnesium and zinc sulphate 4. Zinc and magnesium sulphate
Answer» पता चल गया कि IPL 2020 कब होगा Brijesh PATEL Ipl 2020Brijesh Patel ने बताया कब हो सकता है IPL 2020कोरोना वायरस के चलते पूरी दुनिया परेशान है. सारे काम रुक गए हैं, कुछ भी ढंग से नहीं हो पा रहा. इस परेशानी से BCCI और ICC भी त्रस्त हैं. ICC जहां T20 वर्ल्ड कप कराने के लिए जी-जान से लगी है, वहीं BCCI किसी भी हाल में IPL कराना चाहता है.हालात ये हैं कि BCCI और ICC अपने-अपने इवेंट्स के लिए एक ही विंडो पर आकर अटक गए हैं. ICC ने बहुत पहले T20 वर्ल्ड कप 2020 को 18 अक्टूबर से 15 नवंबर के लिए शेड्यूल किया था.# विंडो का लफड़ाअब BCCI पूरी कोशिश कर रहा है कि इसी विंडो में IPL करा ले. ‘हिंदुस्तान टाइम्स’ के साथ एक इंटरव्यू के दौरान IPL चेयरमैन ब्रजेश पटेल ने कहा,‘हमें उम्मीद है कि हम इस साल IPL करा लेंगे. हम बिना किसी कटौती के पूरा टूर्नामेंट आयोजित करना चाहते हैं. हालांकि यह इस बात पर निर्भर करता है कि ICC अपने T20 वर्ल्ड कप पर क्या फैसला लेती है. लेकिन हम सितंबर एंड या अक्टूबर की शुरुआत में IPL शुरू करना चाहते हैं. ICC को जल्दी ही फैसला करना चाहिए. क्योंकि अगर वर्ल्ड कप होना हुआ, तो टीमों को इसकी तैयारी भी करनी होगी. प्लेयर्स अभी भी लॉकडाउन में हैं.’पटेल ने यह भी कहा कि IPL2020 के लिए उनकी पहली पसंद भारत है, लेकिन यह कोविड-19 के हालात पर निर्भर करता है. पटेल ने कहा,‘हमें देखना होगा कि उस वक्त सरकारी नियम क्या रहेंगे. अभी इसमें वक्त है. UAE और श्रीलंका, दोनों ने ही इसे होस्ट करने का ऑफर दिया है. लेकिन हम इसे अपने घर में कराना चाहेंगे.’पटेल ने साफ किया कि वे बिना फैंस के IPL कराने के प्रयास में हैं. हालांकि यह देखने वाली बात होगी कि ऐसे हाल में IPL एक ही जगह पर होता है या पहले की तरह, होम-अवे बेसिस पर. इससे पहले BCCI प्रेसिडेंट सौरव गांगुली ने भी कहा था कि वह IPL2020 कराने की पूरी कोशिश कर रहे हैं.गांगुली ने कहा था कि BCCI इस साल IPL कराने के लिए सभी तरह के ऑप्शन तलाश रहा है, फिर चाहे टूर्नामेंट खाली मैदान में ही करवाया जाए. प्रशंसक, फ्रेंचाइजी, खिलाड़ी, प्रसारक, प्रायोजक और बाकी सभी लोग इस साल IPL के आयोजन की संभावना को लेकर उत्सुक हैं.जून-जुलाई में प्रस्तावित श्रीलंका टूर को लेकर BCCI ने क्या फैसला किया है?

Discussion

3.	The rate constant for a first order reaction becomes 8 times when the temperature is increased from 360k to 400 k. Calculate the activation energy for the reaction
Answer» KNOW that ANSWER of your QUESTION

Discussion

4.	Compair 3 states of matter on the bases of kinetic energy diffusion(in 3 marks)
Answer» s HELPFUL...PLEASE MARK it BRAINLIEST..

Discussion

5.	How is wool fibre obtained from the sheared wool
Answer» Wool is obtained from this fleece. Shearing is the first step in processing fibre into wool. It is the REMOVAL of the fleece of the sheep along with a THIN LAYER of the skin. ... The longer fibres are made into wool for sweaters, while the shorter fibres are spun and woven into WOOLLEN CLOTH

Discussion

6.	Why sulphur hexa fluoride is exceptionally stable
Answer» THIS IS THE ANS TO UR QUESTION Explanation:it is because, of the comparable SMALL size of SULPHUR atom with fluorine atom and so the steric factor of F-atoms occur, which do not allow other species to ATTACK on sulphur and so it becomes exceptionally stable.HOPE THIS WILL HELP YOU

Discussion

7.	Which of the following is the correct balanced chemical equation for the reaction of copper with nitric acid (HNO3) to give copper nitrate (Cu(NO3)2), nitric oxide (NO) and water?(A) Cu(s) + 4 HNO3(aq) ----> Cu(NO3)2(aq) + 2 NO(g) + H2O(1)(B) Cu(s) + 2 HNO3(aq) -----> Cu(NO3)2(aq) + H2(g)(C) Cu(s) + HNO3(aq) ----> Cu(NO3)2(aq) + NO(g) + H20 (1)(D) 3 Cu(s) + 8 HNO3(aq) ---> 3 Cu(NO3)2(aq) + 2 NO(g) + 4H2O(1)
Answer» c)EXPLANATION:c)I THINK IT IS HELPFUL TO YOUPLZ SUBSCRIBE MEETINGMARK ME AS BRAINLIST

Discussion

8.	Charestic of covalent compound
Answer» Following are the typical characteristics of covalent compounds: (i) Low melting and boiling POINTS: Covalent compounds consist of MOLECULES held by WEAK FORCES. ... Covalent compounds do not CONDUCT electricity, i.e., electricity does not pass through the covalent compounds.

Discussion

9.	Does charge of body has any effect on the mass
Answer» no,EFFECT on MASS......

Discussion

10.	A certain first-order reaction has a rate constant of 10 ^-3 sec ^-1. How much time will it take for 10 g of it to reduce to half the quantity
Answer» From the question, we can write down the following information:Initial amount = 5 gFinal concentration = 3 gRate constant = 1.15 10 - 3s -1= 444.38 s= 444 s (APPROX)Explanation:PLEASE mark me as branliest

Discussion

11.	Explain earth as a magnetic body
Answer» On Earth, flowing of liquid metal in the outer CORE of the PLANET generates electric currents. The rotation of Earth on its axis CAUSES these electric currents to form a magnetic field which extends around the planet. The magnetic field is extremely IMPORTANT to sustaining life on Earth.Explanation:make it Brainlist answer. follow me.

Discussion

12.	56. The amount of heat to be removed from 10 gm water at 0°C to convert it into iceis (Lice = 80 cal/gm)
Answer» Heat supplied is Lfusion + McΔ T + MLvap Q1 = 10 × 336 + 10 × 4.2 × 100 + 10 × 2260 Q1 = 30160 J or 7200 CAL Heat for calorimeter Q2 = 10 × 1

Discussion

13.	Write the IUPAC name of neopentane.
Answer» ISOPENTANE..............

Discussion

14.	A Q.2 Calculate ^° for NHA OH from the following data°(Ba(OH2)]=457.6 S cm’mor'. ^ °[Bacl2)=240.6 S cm’mor' and^ °(NH4cl]=129.8 Scm? mor“.
Answer» MOLAR conductivity at infinite dilution for NH_4OHNH4OH is 523.28 cm^2 mol^{-1}cm2mol−1 .Explanation: \Lambda _m^{\infty}(NH_4OH)=\lambda_m^{\infty}(NH_4^{+})+\lambda_m^{\infty}(OH^{-})=?Λm∞(NH4OH)=λm∞(NH4+)+λm∞(OH−)=?\Lambda _m^{\infty}(Ba(OH)_2)=\lambda_m^{\infty}(Ba^{2+})+\lambda_m^{\infty}(OH^{-})= 523.28 cm^2 mol^{-1}Λm∞(Ba(OH)2)=λm∞(BA2+)+λm∞(OH−)=523.28cm2mol−1 ..(1)\Lambda _m^{\infty}(Ba(Cl)_2)=\lambda_m^{\infty}(Ba^{2+})+\lambda_m^{\infty}(Cl^{-})= 280 cm^2 mol^{-1}Λm∞(Ba(Cl)2)=λm∞(Ba2+)+λm∞(Cl−)=280cm2mol−1 ..(2)\Lambda _m^{\infty}(NH_4Cl)=\lambda_m^{\infty}(NH_4^{+})+\lambda_m^{\infty}(Cl^{-})= 129.8 cm^2 mol^{-1}Λm∞(NH4Cl)=λm∞(NH4+)+λm∞((Cl−)=129.8cm2mol−1 ..(3)\Lambda _m^{\infty}(NH_4OH)=\lambda_m^{\infty}(Ba^{2+})+\lambda_m^{\infty}(OH^{-})-\lambda_m^{\infty}(Ba^{2+})-\lambda_m^{\infty}(Cl^{-})+2\lambda_m^{\infty}(NH_4^{+})+2\lambda_m^{\infty}(Cl^{-})=\lambda_m^{\infty}(NH_4^{+})+\lambda_m^{\infty}(OH^{-})Λm∞(NH4OH)=λm∞(Ba2+)+λm∞(OH−)−λm∞(Ba2+)−λm∞(Cl−)+2λm∞(NH4+)+2λm∞(Cl−)=λm∞(NH4+)+λm∞(OH−)\lambda_m^{\infty}(NH_4^{+})+\lambda_m^{\infty}(OH^{-})=523.28-280+2\times 129.8 cm^2mol^{-1}=502.88 cm^2 mol6{-1}λm∞(NH4+)+λm∞(OH−)=523.28−280+2×129.8cm2mol−1=502.88cm2mol6−1Molar conductivity at infinite dilution for NH_4OHNH4OH is 523.28 cm^2mol^{-1}mol−1 .

Discussion

15.	Is toothpaste acidic or alkaline?☺
Answer» TION: TOOTHPASTE is ALKALINE ( or BASE ).

Discussion

16.	1. Identifikasilah mana yang termasuk larutan, koloid dan campuran ! 2. Golongkanlah koloid yang berhasil anda identifikasi berdasarkan fasa terdispersi, fasa pendispersi dan nama system koloidnya ! NO. FASA TERDISPERSI FASA PENDISPERSI NAMA CONTOH KOLOID DALAM BACAAN 1. Cair Cair Emulsi 2. Cair Padat Emulsi padat / gel 3. Padat Gas Aerosol padat 4. Padat Cair Sol 5. Gas Cair Busa, buih 6. Gas Padat Busa padat 7. Cair Gas Aerosol cair 8 Padat Padat Sol paadat 3. Jelaskan 3 sifat-sifat koloid yang muncul pada bacaan tersebut! 4. Jelaskan fenomena aplikasi/penggunaan koloid dalam kehidupan sehari-hari dalam bacaan tersebut!
Answer» I don't the ANSWER FOLLOW me

Discussion

17.	Full form of dps in radioactivity?
Answer» DISINTEGRATIONS PER SECOND

Discussion

18.	Please answer the. following questions .............
Answer» 2. FUELS can be CLASSIFIED into 3 types- solid,liquid and gaseous fuels.3.We can say ROCK,Glass,Most of metals are classified into incombustible substances.

Discussion

19.	C7h14(oh)2 ka common name and iupac name
Answer» COMMON NAME1 butoxy 2 propanoliupac NAME 2,2, DIETHYL 1,3 propandiol

Discussion

20.	What is the Molarity of pH=3 HCl solution? And how do I find out?
Answer» he pH of HCl solution = 3TO Find:The Molarity of the GIVEN HCl solution.Calculation:- We know that:pH = - log[H⁺]⇒ 3 = - log[H⁺]⇒ [H⁺] = 10⁻³ M = 0.001 M- SINCE, HCl is a monobasic acid, the CONCENTRATION of H⁺ will be equal to the concentration of HCl solution.- Hence, the Molarity of HCl solution = [H⁺]⇒ M = 0.001 M- So, the Molarity of the given HCl solution is 0.001 M.

Discussion

21.	Page No:(5p pagerieDate:foorFind the half life time 0Orden reaction
Answer» please mark me as brainliestExplanation:Derivation of HALF-Life Formula for Zero-Order ReactionsSubstituting t = t1/2, at which point [R] = [R]0/2 (at the half-life of a REACTION, reactant CONCENTRATION is half of the initial concentration).

Discussion

22.	What is the Molarity of pH=3 HCl solution? Can someone explain to me how I calculate and find the answer?
Answer» tion:To calculate the pH of an aqueous SOLUTION you need to KNOW the concentration of the hydronium ION in moles per liter (molarity). The pH is then CALCULATED using the expression: pH = - log [H3O+].

Discussion

23.	मिश्रण क्या है इसके गुणों को लिखें
Answer» जब दो या दो से अधिक तत्वों या यौगिको को किसी भी अनिश्चित अनुपात या मात्रा में मिलाते है तो इस प्रकार बने पदार्थ को मिश्रण कहते है। उदाहरण : वायु , रेत आदि। Explanation:A MIXTURE is a substance made by combining two or more different MATERIALS in such a WAY that no CHEMICAL reaction OCCURS

Discussion

24.	What is the pH of 10-8 M NaOH solution? And can someone please explain how I calculate it?
Answer» PLEASE MARK me as brainliestExplanation:The PH of the SOLUTION is 7.

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25.	What is the pH of 0.05M Ca(OH)2 solution?
Answer» The Answer Is Supposed To Be 12.45 But I KEEP Getting12pls MARK me as brainlist PLS pls FOLLOW me

Discussion

26.	Energy required to pull an electron from first orbit of hydrogen to infinity is 100units . What is the energy needed to pull an orbit from second orbit to infinity
Answer» s.Explanation:Given: Energy required to pull an ELECTRON from FIRST orbit of hydrogen to infinity is 100 units.Find: What is the energy needed to pull an electron from second orbit to infinity?Solution: The energy in an orbit is inversely PROPORTIONAL to n^2.So the energy needed to pull an electron from second orbit to infinity = 25 units.

Discussion

27.	Chemical formula for class 12
Answer» ACETIC ACID FORMULA ch3cooh aluminum hydroxide al(oh3)

Discussion

28.	Help us develop a new technology in order to separate close-boiling isomers more cost effectively
Answer» There are 5 ways to separate the mixturespaper chromatographyfiltrationevoparationsimple distillationfractional distillationExplanation:By using these you can separate CLOSE BOILING isomers more COST effectively

Discussion

29.	State the Newland's law of Octaves. Give the octave table till calcium(Ca).
Answer» NEWLAND's law of octaves held true only for elements up to calcium. Elements with greater atomic masses could not be accommodated into octaves. The elements that were DISCOVERED later could not be FIT into the OCTAVE pattern✔Hơ℘ɛ ıɬ ɧɛƖ℘ʂ!! ✔✌Mąཞƙ ɱɛ ąʂ ცཞąıŋƖıɛʂɬ ☞Hıɬ ąŋɖ Ɩıƙɛ ɱყ ąŋʂῳɛཞ ąŋɖ ɖơŋ'ɬ ʄơཞɠɛɬ ɬơ ʄơƖƖơῳ ɱɛ☜

Discussion

30.	2.Z geometry of the complex ion ?Since the coordination number of Mn24The spin only magnetic moment of (MnBr 1 is 5.9 BM. Pred
Answer» As per the MAGNETIC moment value of [MnBr_4]^{2-} the ion exhibit tetrahedral geometry.Explanation:As the magnetic moment value of the given ion is 5.9 BM, it exhibits tetrahedral geometry.It is because, in [MnBr_4]^{2-}, there are 5 UNPAIRED electrons. This unpaired electrons INVOLVED in BONDING and gives rise to the tetrahedral geometry.Thus it is inferred that as the SPIN only magnetic moment value of given ion is 5.9, it shows tetrahedral geometry.✔Hơ℘ɛ ıɬ ɧɛƖ℘ʂ!!✔✌Mąཞƙ ɱɛ ąʂ ცཞąıŋƖıɛʂɬ☞Hıɬ ąŋɖ Ɩıƙɛ ɱყ ąŋʂῳɛཞ ąŋɖ ɖơŋ'ɬ ʄơཞɠɛɬ ɬơ ʄơƖƖơῳ ɱɛ☜

Discussion

31.	Tell me kya ab icse exam honge
Answer» Not sure about anything.... But I THINK they MIGHT HELD But be safe at HOME

Discussion

32.	10.0 grams of barium chloride dissolved in 90.0 g of water.The density of the solution 1.09gml-1,calculate w/v
Answer» 0.1 the dinesty of the WATER

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33.	How to use POAC method in balancing chemical equations?
Answer» tion:The Principle of Atom CONSERVATION (POAC) states that the TOTAL NUMBER of atoms of reactants must equal the number of atoms of products.

Discussion

34.	Oxidation Phosphorus in Ca3(PO4)2
Answer» nation:trick whenever you see such big , call out their names as the above ONE is calcium phosphate phosphate is IMP .REST is BU***HIT in phosphate PO4- IT IS LIKE HPO4 AND SHORTCUT FOR SUCH PHOSPHOROUS OXIDATION STATE IS NO OF OXYGEN -1 HERE 4-1=3

Discussion

35.	Number of molecules present in 1cc of water is
Answer» tion:Desity of WATER is APPROXIMATELY 1 g/cc . So 18 ML of water weights 18 gm. So it contain 6.022*10^23 molecules IE AVAGADRO number of molecules.

Discussion

36.	Differentiate between a base and an alkali
Answer» The difference is MINOR, but there is ONE. ESSENTIALLY a base is a chemical which will REACT with an acid to form a SALT and water only. An alkali is a water-soluble base. ... Insoluble bases, which are not called alkalis, are all metal oxides and insoluble metal hydroxides.Explanation:hope it helps you...pls mark as brainliest

Discussion

37.	Consider the section of the modern periodic table given below and answer the following questions.
Answer» EXPLAIN the QUESTION to EXPECT a ANSWE

Discussion

38.	How much air would be expelled out if one litre flask is heated from 27ºC to 127ºC, pressure remaining constant?
Answer» V1/V2=T1/T2V1/0.1=300/500V1=.06 cubic DECIMETER or .06 litreif it helps you PLZ CLICK the BRAINLIEST answer and the heart

Discussion

39.	Pls explain this question
Answer» tion:Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity GENERALLY increases as you MOVE from left to right across a period and decreases as you move down a group.Polarity BOND is the separation of electric charge along a bond, leading to a MOLECULE or its chemical groups having an electric dipole or dipole moment. Electrons are not always shared EQUALLY between two bonding atoms.so the more the electronegative the element is, the stronger the bond is between 2 elements.Hopefully understandable ^-^.

Discussion

40.	Balance Zn(s) + Mn(CH3COO)7(aq)
Answer» MN(CH3COO)7 = 7 ZN(CH3COO) + Mn i hop it will help U

Discussion

41.	Balance Ag(s) + Cu(NO3)2(aq)
Answer» Cu + AGNO3 = Cu(NO3)2 + Ag - Chemical Equation Balanced.Explanation:PLEASE mark as BRANLIST

Discussion

42.	Which is the following is not a correct statement about bitumen
Answer» PROVIDE UA OPTIONS to CHOOSE

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43.	Balance Mg(s) + HCl(aq)
Answer» Mg (s) + 2HCl------->MgCl2 ( AQ) + H2 ( G) MARK AS BRAINLIST....

Discussion

44.	Why solid CO2 is stored under high pressure?
Answer» Solid CO2 is kept under high PRESSURE because on DECREASING the pressure, it gets CONVERTED directly into carbon DIOXIDE.

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45.	Give me just simplified reason , i already know answer!
Answer» DExplanation: u just have CHECK the draw the structures and check the lone pair present in it and SHAPES r DIFFERENT as hybridisation is different refer the attachment hope it helps.. if u LIKE it then plz don't forget to mark me as Brainliest

Discussion

46.	Oxidation of Nitrogen in Ba(NO3)
Answer» tion:Since there are TWO nitrate ions, that AMOUNTS to charge of -2. For overall neutrality, Barium should have the OXIDATION number of +2. We can do a similar CALCULATION for Nitrogen by putting the charge of Oxygen as -2. Then nitrogen is in the oxidation STATE of +5.

Discussion

47.	Which property of gas particles allows them to spread around in a closed container? a) motion b) density c) diffusion d) size
Answer» the REQUIRED ANSWER is DENSITY

Discussion

48.	Pure calcium carbonate and dilute hydrochloric acid are reacted and 2 litres of carbon dioxide was collected at27°C and normal pressure.CaCO3 + 2HCl → CaCl2 + H2O + CO2Calculate : (a) the mass of salt required,(b) the mass of the acid required.
Answer» N(a) The MASS of salt required is, 8.12 grams(b) The mass of the acid required is, 5.93 gramsExplanation: Given,The volume of carbon dioxide gas = 2 LThe temperature of carbon dioxide gas = 27°C = 273 + 27 = 300KThe pressure of carbon dioxide gas = 1 atmFirst, we have to calculate the moles of carbon dioxide gas by using the ideal gas equation.PV = nRTwhere,P = pressure of carbon dioxide gasV = volume of carbon dioxide gasT = temperature of carbon dioxide gasn = number of moles of carbon dioxide gasR = gas constant = 0.0821 L.atm/MOLE.K(1 atm) × (2L) = n × (0.0821 L.atm/mole.K) × (300K)n = 0.0812 mole(a) Now we have to calculate the mass of salt required.The balanced chemical reaction is,CACO3(s)+2HCl(l)⟶CaCl2(s)+H2O(l)+CO2(g)CaCOX3(s)+2HCl(l)⟶CaClX2(s)+HX2O(l)+COX2(g)From the balanced reaction, we conclude that,As, 1 mole of CO2 obtained from 1 mole of CaCO3 So, 0.0812 moles of CO2 obtained from 0.0812 moles of CaCO3Mass of CaCO3 = Moles of CaCO3 × Molar mass of CaCO3 = 0.0812 mole × 100g/mole = 8.12 gTherefore, the mass of the salt required is, 8.12 grams(b) Now we have to calculate the mass of acid required.The balanced chemical reaction is,CaCO3(s)+2HCl(l)⟶CaCl2(s)+H2O(l)+CO2(g)CaCOX3(s)+2HCl(l)⟶CaClX2(s)+HX2O(l)+COX2(g)From the balanced reaction we conclude that,As, 1 mole of CO2 obtained from 2 mole of HClSo, 0.0812 mole of CO2 obtained from 0.1624 mole of HClMass of HCl = Moles of HCl × Molar mass of HCl = 0.1624 mole × 36.5 g/mole = 5.93 gTherefore, the mass of the acid required is, 5.93 grams

Discussion

49.	What happens when methyl iodide in treated with metallic zinc
Answer» ZINC and zind IODIDE is FORMED

Discussion

50.	If mass %of zinc in an enzyme is .5% then the min.wt. of enzyme will be
Answer» MINIMUM molecular WEIGHT of PEROXIDASE ANHYDROUS enzyme is 15,792 g/mol. Minimum molecular weight of peroxidase anhydrous enzyme is 15,792 g/moleculesExplanation:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Draw the Lewis structure and find out the formal charge a)CO2b)CO3²-c)SO4²-d)H3O+e)NF3​

Which of the following undergo chemical reactions? Describe the reactions and write their formula 1. Iron and copper sulphate 2. Copper and ferrous sulphate 3. Magnesium and zinc sulphate 4. Zinc and magnesium sulphate

The rate constant for a first order reaction becomes 8 times when the temperature is increased from 360k to 400 k. Calculate the activation energy for the reaction

Compair 3 states of matter on the bases of kinetic energy diffusion(in 3 marks)​

How is wool fibre obtained from the sheared wool​

Why sulphur hexa fluoride is exceptionally stable​

Charestic of covalent compound​

Does charge of body has any effect on the mass​

A certain first-order reaction has a rate constant of 10 ^-3 sec ^-1. How much time will it take for 10 g of it to reduce to half the quantity

Explain earth as a magnetic body​

56. The amount of heat to be removed from 10 gm water at 0°C to convert it into iceis (Lice = 80 cal/gm)​

Write the IUPAC name of neopentane.​

A Q.2 Calculate ^° for NHA OH from the following data°(Ba(OH2)]=457.6 S cm’mor'. ^ °[Bacl2)=240.6 S cm’mor' and^ °(NH4cl]=129.8 Scm? mor“.​

Is toothpaste acidic or alkaline?☺​

Full form of dps in radioactivity?​

Please answer the. following questions .............​

C7h14(oh)2 ka common name and iupac name​

What is the Molarity of pH=3 HCl solution? And how do I find out?

Page No:(5p pagerieDate:foorFind the half life time 0Orden reaction ​

What is the Molarity of pH=3 HCl solution? Can someone explain to me how I calculate and find the answer?

मिश्रण क्या है इसके गुणों को लिखें​

What is the pH of 10-8 M NaOH solution? And can someone please explain how I calculate it?

What is the pH of 0.05M Ca(OH)2 solution?

Energy required to pull an electron from first orbit of hydrogen to infinity is 100units . What is the energy needed to pull an orbit from second orbit to infinity

Chemical formula for class 12​

Help us develop a new technology in order to separate close-boiling isomers more cost effectively

State the Newland's law of Octaves. Give the octave table till calcium(Ca).

2.Z geometry of the complex ion ?Since the coordination number of Mn24The spin only magnetic moment of (MnBr 1 is 5.9 BM. Pred​

Tell me kya ab icse exam honge​

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How much air would be expelled out if one litre flask is heated from 27ºC to 127ºC, pressure remaining constant?​

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How much air would be expelled out if one litre flask is heated from 27ºC to 127ºC, pressure remaining constant?

Give me just simplified reason , i already know answer!

Pure calcium carbonate and dilute hydrochloric acid are reacted and 2 litres of carbon dioxide was collected at27°C and normal pressure.CaCO3 + 2HCl → CaCl2 + H2O + CO2Calculate : (a) the mass of salt required,(b) the mass of the acid required.