52639 + Interview Questions in Secondary School in Chemistry

1.	What are the two gases formed while heating lead nitrate
Answer» On the heating of lead NITRATE formation of toxic FUMES of lead occur, which is very harmful for the HUMAN body, formation of OXYGEN, and also the formation of NITROGEN dioxide occurs. 2Pb(NO3)2 → 2PbO + 4NO2 + O2

Discussion

2.	name the acid present in ant streak string and give its chemical formula also give the common method to get relief from the discomfort caused by the ant sting
Answer» Applying baking soda or turmeric on the place of sting is thecommon method to get relief from the DISCOMFORT CAUSED by the ant sting. The acid present in ant stings is formic acid. It's CHEMICAL formula is HCOOH.

Discussion

3.	Chemistry basic in hindi
Answer» क्या आप जानते हैं कि सोने में जंग क्यों नहीं लगता है? Oct 10, 2018 सोना प्राचीन काल से ही भारत में उपयोग किया जाता रहा है. इसकी शुद्धता को कैरट में मापा जाता है. लोग इसको गहनों, सिक्कों इत्यादि के रूप में प्रयोग करते हैं. आपने ध्यान दिया होगा कि बाकी अन्य धातुओं की तरह सोने में जंग नहीं लगता है. इसके पीछे क्या कारण हो सकता है. आइये इस लेख के माध्यम से अध्ययन करते हैं. बारिश के बाद मिट्टी से सुगंध क्यों आती है? SEP 4, 2018 क्या आपने कभी ध्यान दिया है कि जब सुखी धरती पर बारिश की बूंदें गिरती हैं तो सौंधी सी खुशबु आती है. ऐसा क्यों होता है. क्या इसके पीछे कोई वैज्ञानिक कारण है. आइये इस लेख के माध्यम से अध्ययन करते हैं. जानें पदार्थ के कण लगातार क्यों चलते रहते हैं? Aug 30, 2018 पदार्थ वह तत्व है जिसमें वजन होता है और जो जगह को घेर लेता है. हमारे चारों ओर सब कुछ कणों से ही बना है. कण जो पदार्थ बनाते हैं वे इतने छोटे होते हैं कि हम उन्हें माइक्रोस्कोप के जरिये भी नहीं देख सकते हैं. कण की विशेषता में से एक यह है कि यह लगातार चलते रहते हैं. आइये इस लेख के माध्यम से अध्ययन करते हैं पदार्थ के कणों के बारे में. क्या आप जानते हैं कि AC से पानी क्यों निकलता है? Jul 19, 2018 गर्मियों में AC का इस्तेमाल बढ़ जाता है. आपने ध्यान दिया होगा जब AC चलता है तो उसमें से पानी निकलता है. परन्तु क्या आपने कभी सोचा है कि AC से पानी क्यों निकलता है. AC कैसे काम करता है, उसमें लिकिंग क्यों और कैसे होती है इत्यादि इस लेख के माध्यम से अध्ययन करेंगे. वाशिंग सोडा क्या है और इसका उत्पादन कैसे होता है? MAY 4, 2018 वाशिंग सोडा (Washing Soda) सोडियम कार्बोनेट है जिसमें क्रिस्टलीकरण पानी के 10 अणु होते हैं. इसका उपयोग ग्लास, साबुन, डिटर्जेंट, पेपर इत्यादि के निर्माण में किया जाता है. आइये वाशिंग सोडा, इसका उत्पादन, गुण और उपयोगों के बारे में इस लेख के माध्यम से अध्ययन करते हैं. परमाणु हथियारों और रासायनिक हथियारों के बीच क्या अंतर होता है? Apr 10, 2018 रासायनिक हथियार, मानवनिर्मित रसायन से बनता है और परमाणु हथियार एक विस्फोटक उपकरण है जो कि परमाणु प्रतिक्रियाओं से बनता है. परमाणु हथियार, रासायनिक हथियारों की तुलना में अधिक विनाशकारी और उसका प्रभाव काफी लंबे समय तक रहता है. आइये इस लेख के माध्यम से परमाणु और रासायनिक हथियारों के बीच क्या अंतर होता है, किससे बनता है आदि के बारे में अध्ययन करेंगे. पॉलीमर और प्लास्टिक में क्या अंतर है Apr 5, 2018 प्लास्टिक ऐसे पदार्थों का समूह है जो आसानी से मोड़ा जा सकता है तथा उन्हें किसी भी आकार में ढाला जा सकता है. दूसरी तरफ बहुलकीकरण (polymerisation) प्रक्रम के फलस्वरूप बने उच्च अणु भार के यौगिक को बहुलक (polymer) कहते हैं. आइये इस लेख के माध्यम से अध्ययन करते हैं कि प्लास्टिक एक प्रकार का पॉलीमर होता है या नहीं, इन दोनों के बीच में क्या अंतर होता है. रासायनिक हथियार क्या होते हैं और कितने प्रकार के होते हैं Mar 15, 2018 रासायनिक हथियार को केमिकल वेपन भी कहते है. इन हथियारों को गैस या तरल किसी भी रूप में इस्तेमाल किया जा सकता हैं. आइये इस लेख के माध्यम से अध्ययन करते हैं कि रासायनिक हथियार क्या होते हैं, शरीर पर इनका क्या असर होता है, खतरनाक रासायनिक हथियार कौन-कौन से हैं आदि. क्षार क्या है और कितने प्रकार का होता है? Feb 22, 2018 क्षार स्वाद में कड़वे होते हैं. ये जल में विलय होते है. क्षार एवं अम्ल की अभिक्रिया के साथ ही धात्विक ऑक्साइड अम्ल के साथ अभिक्रिया कर के लवण एवं जल प्रदान करते हैं. आइये इस लेख के माध्यम से अध्ययन करते है कि क्षार क्या होते है, कितने प्रकार के होते है और इसके क्या-क्या गुण है. स्टील और स्टेनलेस स्टील के बीच क्या अंतर होता है? Feb 9, 2018 स्टील और स्टेनलेस स्टील देश में इस्तेमाल किए जाने वाले सामान्य पदार्थ हैं. इन दोनों के बीच गुण, संरचना, वजन, मूल्य आदि को लेकर अंतर हैं. इस लेख में स्टील और स्टेनलेस स्टील के बीच क्या अंतर होता है के बारे में अध्ययन करेंगे. रासायनिक अभिक्रियाएं कितने प्रकार की होती हैं Feb 3, 2018 हमारे दैनिक जीवन में रासायनिक अभिक्रियाओं का उपयोग होता है जैसे कि भोजन का पाचन, दूध का दही बनना, फलों का पकना, आदि. आइये इस लेख के माध्यम से अध्ययन करते है कि रसायनिक अभिक्रिया क्या होती है और उदाहरणों की मदद से यह कितने प्रकार की होती हैं. कोलाइडी विलयन (COLLOIDAL Solution) क्या है? Jan 29, 2018 कोलाइडी विलयन (Colloidal Solution) के कण निलंबन के कणों (Suspension particles) की अपेक्षा आकार में छोटे होने के कारण यह समांगी (Homogeneous) मिश्रण प्रतीत होते है, परंतु वास्तव में यह एक विषमांगी मिश्रण (HETEROGENEOUS mixture) होते है. उदारण दूध, शेविंग क्रीम इत्यादि. आइये इस लेख के माध्यम से अध्ययन करते है कि कोलाइडल विलयन क्या होते है, इनका कहा उपयोग होता है, टिनडल प्रभाव क्या होता है आदि.

Discussion

4.	Give the theory of equilibrium state
Answer» In ECONOMICS, general EQUILIBRIUM theoryattempts to explain the BEHAVIOR of supply, demand, and prices in a whole economy with several or many INTERACTING markets, by seeking to prove that the interaction of demand and supply will result in an overall general equilibrium. General equilibrium theory CONTRASTS to the theory of partialequilibrium, which only analyzes single markets. General equilibrium theory both studies economies using the model of equilibrium pricing and seeks to determine in which circumstances the assumptions of general equilibrium will hold. The theory dates to the 1870s, particularly the work of French economist Léon Walras in his pioneering 1874 work Elements of Pure Economics.[1]

Discussion

5.	How are methane and ethane prepared in laboratory?
Answer» METHANE is prepared in the laboratory by reacting sodium ACETATE (CH3COONA)with sodalime(sodalime is a mixture of NAOH and CaO).The rectants are heated in a test tube...

Discussion

6.	Is Aluminium Al or Al2. Tell only if you are sure.
Answer» ALUMINIUM Is Al2. please MARK it as BRAINLIEST

Discussion

7.	An ideal gas cannot be liquefied becausei) It's critical temperature is always above 0°C ii) it's molecule are relatively small in size iii) it solidifies before becoming a liquid iv) forces operative between its molecules are negligible
Answer» The ANSWER of the question is IV (FORCES OPERATIVE between its molecules are negligible)

Discussion

8.	A reversible reaction of metal with steam
Answer» Pcl3+cl2==========pcl5

Discussion

9.	A Scuba divers come towards water surface from underwater solubility of gases in their blood 1 Increases2 Decreases3 Fristly increases then decreases4 Fristly decreases then increases
Answer» DECREASE is a RIGHT ANSWER HOPE it will HELP you

Discussion

10.	On hydrolysis of starch, we finally getA. Glucose B. Fructose C. Both A & BD. Sucrose
Answer» HEYA!! here is your ANSWER⤵️⤵️ On HYDROLYSIS of starch, we GET glucose. hope my answer HELPS you

Discussion

11.	2 methyl propanol to 2 methyl propane
Answer» The TWO METAL PREPARES are IRON and COPPER

Discussion

12.	If ionisation constant of acetic acid is 1.8 . 10^(-5), at what concentration will it be dissociated to 2%
Answer» At a concentration of 0.045[M], acetic ACID will be dissociated to 2% Acetic acid (CH₃COOH) dissociates into two IONS- CH₃COO⁻ and H⁺ CH₃COOH ⇄ CH₃COO⁻ + H⁺ Initial CONC.: c 0 0 At equillibrium: c(1-α) cα cα where α is the degree of dissociation = 2% = 2/100 = 0.02 Ionisation constant K = [(cα)(cα)]/[c(1-α)] = cα²/(1-α) = cα² [1-α≈1, as α is very SMALL] C = K/α² = (1.8×10⁻⁵)/(0.002)² = 0.045 [M] This is the required concentration.

12.

If ionisation constant of acetic acid is 1.8 . 10^(-5), at what concentration will it be dissociated to 2%

Answer»

At a concentration of 0.045[M], acetic ACID will be dissociated to 2%

Acetic acid (CH₃COOH) dissociates into two IONS- CH₃COO⁻ and H⁺

CH₃COOH ⇄ CH₃COO⁻ + H⁺

Initial CONC.: c 0 0

At equillibrium: c(1-α) cα cα

where α is the degree of dissociation = 2% = 2/100 = 0.02

Ionisation constant K = [(cα)(cα)]/[c(1-α)] = cα²/(1-α) = cα² [1-α≈1, as α is very SMALL]

C = K/α² = (1.8×10⁻⁵)/(0.002)² = 0.045 [M]

This is the required concentration.

Discussion

13.	The given compound reacts with OH in aqueous medium then Which Cl will leave fastly
Answer» ALPHA CHLORINE will LEAVE FASTLY

Discussion

14.	Name the catalyst commonly used in hydrogenation of oil to form fats.
Answer» NICKEL is the most COMMONLY USED CATALYST.

Discussion

15.	Calculate the percentage degree of dissociation of an electrolyte xy2
Answer» Answer: 75% HOPE it HELPS ✔︎✔️✔︎

15.

Calculate the percentage degree of dissociation of an electrolyte xy2

Answer»

Answer:

75%

HOPE it HELPS ✔︎✔️✔︎

Discussion

16.	Hydrogen sulphide burns in air to give water and sulphur dioxide . Translate this into chemical equation and balance them.
Answer» HI mate... your answer.... H2S + O2 ---------------> H2O + SO2 ITS BALANCED HOPE IT HELPS PLZ MARK IT AS A BRAINLIST ANSWER

16.

Hydrogen sulphide burns in air to give water and sulphur dioxide . Translate this into chemical equation and balance them.

Answer»

HI mate...

your answer....

H2S + O2 ---------------> H2O + SO2

ITS BALANCED

HOPE IT HELPS

PLZ MARK IT AS A BRAINLIST ANSWER

Discussion

17.	The enthalpies of neutralisation for CH3COOH with NaOH and NH4OH with HCl are -50.6 and -51.4 kJ eq-1 respectively . Calculate the enthalpy of neutralisation of CH3COOH with NH4OH ?
Answer» Answer: The enthalpy of neutralization will be -44.38 kJ/eq. Explanation: We are GIVEN two neutralization REACTIONS: $CH_3COOH+NaOH\rightarrow CH_3COO^-+Na^++H_2O$ ; $\Delta H_{neutralization}=-50.6kJ/eq$ ...(1) $NH_4OH+HCl\rightarrow NH_4^++Cl^-+H_2O$ ; $\Delta H_{neutralization}=-51.4kJ/eq$ ...(2) Equation 1 is the reaction of strong base and WEAK acid & equation 2 is the reaction of strong acid and weak base. To form the equation in which $CH_3COOH$ reacts with $NH_4OH$ , we write another equation, which will be SUBTRACTED from equation 1 and equation 2. Equation for the reaction of strong acid and strong base: $NaOH+HCl\rightarrow Na^++Cl^-+H_2O$ ; $\Delta H_{neutralization}=-57.62kJ/eq$ ...(3) Subtracting equation 3 from 1 and 2, we get $Eq.1+Eq.2-Eq.3$ $NH_4OH+CH_3COOH\rightarrow CH_3COONH_4+H_2O$ ...(4) So, the calculations for enthalpies will be: $[-50.6-51.4-(-57.62)]kJ/eq=-44.38kJ/eq$ So, the enthalpy of neutralization of equation 4, will be -44.38 kJ/eq.

17.

The enthalpies of neutralisation for CH3COOH with NaOH and NH4OH with HCl are -50.6 and -51.4 kJ eq-1 respectively . Calculate the enthalpy of neutralisation of CH3COOH with NH4OH ?

Answer»

Answer: The enthalpy of neutralization will be -44.38 kJ/eq.

Explanation: We are GIVEN two neutralization REACTIONS:

$CH_3COOH+NaOH\rightarrow CH_3COO^-+Na^++H_2O$ ; $\Delta H_{neutralization}=-50.6kJ/eq$ ...(1)

$NH_4OH+HCl\rightarrow NH_4^++Cl^-+H_2O$ ; $\Delta H_{neutralization}=-51.4kJ/eq$ ...(2)

Equation 1 is the reaction of strong base and WEAK acid & equation 2 is the reaction of strong acid and weak base.

To form the equation in which $CH_3COOH$ reacts with $NH_4OH$ , we write another equation, which will be SUBTRACTED from equation 1 and equation 2.

Equation for the reaction of strong acid and strong base:

$NaOH+HCl\rightarrow Na^++Cl^-+H_2O$ ; $\Delta H_{neutralization}=-57.62kJ/eq$ ...(3)

Subtracting equation 3 from 1 and 2, we get

$Eq.1+Eq.2-Eq.3$

$NH_4OH+CH_3COOH\rightarrow CH_3COONH_4+H_2O$ ...(4)

So, the calculations for enthalpies will be:

$[-50.6-51.4-(-57.62)]kJ/eq=-44.38kJ/eq$

So, the enthalpy of neutralization of equation 4, will be -44.38 kJ/eq.

Discussion

18.	What is the full form of PET , HDPE , NMP ,ABS , GPC , DMT , CRP , SFRP ?
Answer» $\color{red}\huge\bold\star\underline\mathcal{Hey\:Mate}\star$ Here is your ANSWER...☺☺☺ ➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡ PET - Polyethylene terephthalate HPDE - High-density polyethylene NMP - Network MANAGEMENT Protocol ABS - An anti-lock BRAKING system GPC - GEL Permeation Chromatography DMT - Developmental Maintenance Testing CRP- C-Reactive Protein SFRP - SECRETED frizzled-related protein ✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔ I hope this answer is helpful to u...❤❤❤ Keep Asking...✌✌✌ ✨✨✨If help you. Mark my answer as a brainliest✨✨✨ $❤❤❤❤ THANK YOU ❤❤❤❤$

Discussion

19.	Constituents of terry wool
Answer» the CONSTITUENTS are POLYESTER and WOOL !!!

Discussion

20.	Here Is A Question For You....✌️Make A Electron Dot Structure By Your own.Please Don't Copy From Google.Best Answer Will Be Brainliest..✌️✌️
Answer» Answer: The formula for cyclopentaneis C5H10. Its ELECTRON dot STRUCTURE is see the PIC ..

Discussion

21.	Calculate 0.25 mole of N atoms (mass)
Answer» MASS = no :of MOLE × ATOMIC mass = 0.25× 14 = 3.5 G

Discussion

22.	10 examples for IUPAC compounds
Answer» ABE NAHI AATA abe nahi aata abe nahi aata

Discussion

23.	10 examples for IUPAC name
Answer» IUPAC STAND for International UNION for Pure and Applied Chemistry. Few examples for iupac names are attached here with Hope it HELPS you

Discussion

24.	which type of force act between nucleus and orbitals bcoz electron is a negative charge and nucleus is a positive charge but there is no attraction between them so which type of force act on outerside of orbital
Answer» SHAYAD CENTRIFUGAL FORCE

Discussion

25.	A mixture of 45 liter of spirit and wather contain 20% of wather in it. How much water must be added to make the water 25% in the new mixture ?
Answer» HEY MATE ^_^ CHECK this ATTACHMENT #Be Brainly❤️

Discussion

26.	Name of element which have 26 electron in its orbit when its electron
Answer» IRON because iron have 26 electrons and 20 core electrons and 6 VALENCY electrons

Discussion

27.	most abundant ore of sodium is. option 1 sodium nitrate 2 sodium sulphate 3 sodium phosphate 4 sodium chloride
Answer» 4. sodium CHLORIDE (NaCl).... HOPE you UNDERSTAND... PLZ mark as brainlist

Discussion

28.	Does metals absorb hydrogen?
Answer» Yes , when rusting PROCESS some metals absorbs HYDROGEN.

Discussion

29.	An atom m if an element reacts with oxygen to form m2o2 calculate thevalency of the element m
Answer» VALENCY of oxygen is NORMALLY -2. But given COMPOUND appears like a peroxide in which valency of oxygen is -1. So, valency of element M is +1.

29.

An atom m if an element reacts with oxygen to form m2o2 calculate thevalency of the element m

Answer»

VALENCY of oxygen is NORMALLY -2. But given COMPOUND appears like a peroxide in which valency of oxygen is -1.

So, valency of element M is +1.

Discussion

30.	Finding mole from number of particlesconvert 12.044*10^23 molecule of nitrogen into moles for class 9
Answer» HEYA,,,,,GM For MOLES 1) No. of Molecules/NA = moles from this we GET 12.044*10^23/6.022×10^23 = moles ANSWER No. of moles =2... THANK YOU....

Discussion

31.	What is meant by chemical bond
Answer» The CHEMICAL bond is a bond between two or more election or ATOMS or elements etc in that bond the SHARE of the energy also OCCURS

Discussion

32.	Most abundant ore of sodium
Answer» Sodium is a chemical element with symbol Na (from Latin natrium) and ATOMIC number 11. It is a SOFT, silvery-white, highly reactive metal. Sodium is an ALKALI metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, CREATING a positively charged ion—the Na+ cation. Its only stable isotope is 23Na. The free metal does not occur in nature, but must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and rock salt (NaCl).

Discussion

33.	Hydrogen is passed over black copper oxide
Answer» Hey FRIEND if h2 is PASSED through cuo then h2+cuo ---->h2o +cu it leaves behind the COPPER and react with h2 to form water PLEASE MARK AS BRANLIEST

Discussion

34.	The masses of the fundamental particle decrease in ordera. e>p>nb. e>n>pc. p>n>ed. n>p>e
Answer» D OPTION is CORRECT $HOPE IT HELPS PLEASE MARK AS BRAINLIEST$

Discussion

35.	The charge and mass ratio is the highest for :-a. the proton b. the electronc. the Alpha particle d. sodium positive
Answer» The right ANSWER is the PROTON because Proton is 1840 TIMES heavier than ELECTRON.

Discussion

36.	Absorption of carbohydrates proteins and lipids
Answer» Carbohydrates All carbohydrates absorbed in the small intestine must be hydrolyzed to monosaccharides prior to absorption. ... Digestion of starch begins with the action of salivary alpha-amylase/ptyalin, although its activity is slight in comparison with that of pancreatic amylase in the small intestine proteins SITES of Absorption of Protein Digestion Products. STOMACH plays a negligible role in the absorption of protein digestion products. The small intestine is the principal site of protein absorption. By the time the luminal contents reach the ileocecal junction, absorption of proteins is almost complete. lipids Absorption of Lipids. The bulk of dietary lipid is neutral fat or TRIGLYCERIDE, composed of a GLYCEROL backbone with each carbon linked to a FATTY acid. Foodstuffs typically also contain phospholipids, sterols like cholesterol and many minor lipids, including fat-soluble vitamins.

Discussion

37.	The lower homologue of butanoic acid
Answer» ANSWER: this is your answer I HOPE this answer is RIGHT.

37.

The lower homologue of butanoic acid

Answer»

ANSWER:

this is your answer

I HOPE this answer is RIGHT.

Discussion

38.	Hydrochloric acid contains (1) hydrogen (2)chlorine . Prove it . Write equations for the reactions
Answer» H2+Cl2---2HCl Hydrogen REACTS with CHLORINE to GET HCl acid by COMBINATION reaction

Discussion

39.	A compund containg sodium hydrogen sulphur calculate the molecular formula of the anhydrous compund
Answer» ElementPercentageRelative NUMBER of atomsSimplest RatioNa14.28 %(14.28/23) = 0.62(0.62/0.31) = 2S9.92 %(9.92/32) = 0.31(0.31/0.31) = 1H6.20 %(6.20/1) = 6.20(6.20/0.31) = 20O(100 - 30.4) = 69.6 %(69.6/16) = 4.35(4.35/0.31) = 14 The EMPIRICAL formula of the compound is Na2S1H20O14. This is the empirical formula of crystalline salt, if in crystalline salt all HYDROGEN atoms are combined with oxygen only to from WATER of crystallization, then the emipirical formula of the crystalline salt will be Na2SO4.10H2O. Emiprical formula mass of crystalline salt = (2x23) + 32 + (4x16) + (10x18) = 322 u. Molecular mass of the crystalline salt = 322 u n = (Molecular Mass)/(empirical formula mass) = 322 / 322 = 1 Thus, Molecular formula of crystalline salt = Na2SO4.10H2O The anhydrous salt will not CONTAIN water of crystallization, so the molecular formula of anhydrous salt = Na2SO4. Molecular mass of anhydrous salt = 322 -

Discussion

40.	A compound consist 32%carbon 4% hdrogen and rest oxygen its vapour density is 75 calculate empirical formula and molecular formula
Answer» EMPIRICAL FORMULA and MOLECULAR formula

Discussion

41.	What is observed when you put some Zn pieces into blue copper sulphate solution
Answer» ZN +CUSO4---ZNSO4 +CU

Discussion

42.	Give a chemical test to distinguish between formic acid and butanoic acid
Answer» HCOOH REACTS WITH TOLLENS REAGENT [AMMONICAL SILVER NITRATE] ,SILVER MIRROR IS FORMED WHILE CH3COOH DOES NOT REACTS WITH TOLLENS REAGENT. TEST 1: Todistinguish between FORMIC acid andacetic acid use tollens(tollens reagent =ammonical silver nitrate solution) test(silver mirror) or FEHLING solution.

Discussion

43.	How to classify if we have two beakers one have saturated and other one is unsaturatedhow to justify
Answer» Simple if a SOLUTION is SATURATED you can't and more solvent that is it won't mix but if UNSATURATED it will mix with more solvent

Discussion

44.	According to some experts, carbon dioxide is accumulating in the atmosphere gmatclub
Answer» DUE to FOLLOWING REASONS CO2 is accumulating in atmosphere. URBANIZATION INDUSTRIALIZATION VEHICULAR TRAFFIC This CAUSE GLOBAL WARMING.

Discussion

45.	What is the colour of hydrated ferrous sulphate crystals . how this colour change on heating
Answer» HEY HERE IS YOUR ANSWER ---------------------------------------------------- The ferrous sulphate crystals are LIGHT GREEN in colour. The GAS emitted has the characteristic odour of burning sulphur. On heating, the colour changes from light green to white. On further heating, the white substance changes to dark brown SOLID. -------------------------------------------------- HOPE IT HELPS !!! PLEASE MARK AS BRAINLIEST !!!!!!

Discussion

46.	State law of conservation of mass
Answer» It states that mass can neither be created nor DESTROYED in a CHEMICAL REACTION

Discussion

47.	Why h2s is reducing agent but so2 is both oxidizing and reducing agent
Answer» In H2S sulphur has -2 oxidation state so it can loss electron to attain +4 and +6 oxidation state without gaining the electron and SO2 acts as both BCOZ it can LOSE and gain electron

Discussion

48.	A labelled diagram for the preparation of CO2 in laboratory????????????
Answer» I HOPE it will HELP you

Discussion

49.	What is the hybridisation of N in NO and NO2?
Answer» X=( 5 +0+0)/2 This comes out to be 2.5.... Now in order to get the HYBRIDIZATION as a whole number we have to comapare the electronegativity of the CENTRAL atom (nitrogen here) with the side ATOMS (oxygen here). When side atom is more electronegative than X’=X+0.5 and when central atom is more electronegative than X’=X-0.5…… SO HYBRIDIZATION OF NO2 is 3 Similarly the hybridisation of NO is also 3 i.e. sp2 hope it helps:)

Discussion

50.	Draw the bond line formula of2-chlroropentane.and show that Bef3 molecule has zero dipole moment.and mention the factors effecting ionization enthalpy.
Answer» Hi MATE. Thanks for asking this QUESTION, Here is your answer, Given : T = 25c = 298k V = 150 ml. n = w/m = 1.95 / 342 = 0.005 MOLES. R = 8.314 J/k.mol. \pi \: =π= We know that, \pi \: v \: = \: n \: r \: tπv=nrt Therefore, \pi \ \times 150 \: = \: 0.005 \times 8.314 \times 298π ×150=0.005×8.314×298 \begin{lgathered}\pi \: \times 150 = \: 5 \times {10}^{? - 3 } \times 8.314 \times \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 298\end{lgathered}π×150=5×10?−3×8.314×298 \pi \: = \: 0.33 \times {10}^{? - 2} \times 2477.5π=0.33×10?−2×2477.5 \pi \: = \: 3.3 \times {10}^{? - 3} \times 2477.5π=3.3×10?−3×2477.5 \pi \: = 8175.98 \: \times {10}^{ - 3} pa.π=8175.98×10−3pa.

Discussion

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