52639 + Interview Questions in Secondary School in Chemistry

1.	Carbon di oxide simplest ratio
Answer» CO2 carbon DIOXIDE MASS RATIO of carbon to OXYGEN 3:2 mark as BRAINLIEST answer

1.

Carbon di oxide simplest ratio

Answer»

CO2

carbon DIOXIDE

MASS RATIO of carbon to OXYGEN

3:2

mark as BRAINLIEST answer

Discussion

2.	Tanu Sulphuric Amla copperplate par Dala Jata Hai To Kya Hota Hai Hindi mein
Answer» Answer: प्राचीनकाल के कीमियागर एवं रसविद् आचार्यों को सलफ़्यूरिक अम्ल के संबंध में बहुत समय से पता था। उस समय हरे कसीस को गरम करने से यह अम्ल प्राप्त होता था। बाद में फिटकरी को तेज आँच पर गरम करने से भी यह अम्ल प्राप्त होने लगा। प्रारंभ में सलफ़्यूरिक अम्ल चूँकि हरे कसीस से प्राप्त होता था, अत: इसे 'कसीस का तेल' कहा जाता था। तेल शब्द का प्रयोग इसलिए हुआ कि इस अम्ल का प्रकृत स्वरूप तेल सा है। प्राय: सभी आधुनिक उद्योगों में सलफ़्यूरिक अम्ल अत्यावश्यक होता है। अत: ऐसा माना जाता है कि किसी देश द्वारा सलफ़्यूरिक अम्ल का उपभोग उस देश के औद्योगीकरण का सूचक है। सलफ़्यूरिक अम्ल के विपुल उपभोगवाले देश अधिक समृद्ध माने जाते हैं। प्रयोगशालाओं में निम्नांकित तीन रीतियों से अल्प मात्रा में सलफ़्यूरिक अम्ल तैयार किया जा सकता है : (1) सल्फ़र ट्राइऑक्साइड को जल में घुलाने से, (2) वायु के संसर्ग में सल्फ़्यूरस अम्ल के विलयन के मंद ऑक्सीकरण से और (3) सल्फ़र डाइऑक्साइड तथा हाइड्रोजन परॉक्साइड की सीधी क्रिया से। औद्योगिक स्तर पर सीस-कक्ष-विधि (LEAD chamber process) तथा संस्पर्श विधि (contact process) से अम्ल का उत्पादन होता है। सीस कक्ष विधि में जल की उपस्थिति में नाइट्रिक अम्ल द्वारा सल्फ़र डाइऑक्साइड के ऑक्सीकरण से अम्ल बनता है। यह क्रिया बड़े बड़े सीस कक्षों में संपन्न होती है अत: इसका नाम सीस-कक्ष-विधि पड़ा है। संस्पर्श विधि में सल्फ़र अथवा आयरन सल्फ़ाइड सदृश किसी सल्फ़ाइड के दहन से सल्फर डाइऑक्साइड पहले बनता है और वह प्लैटिनम धातुयुक्त ऐसबेस्टस उत्प्रेरक की उपस्थिति में वायु के ऑक्सीजन द्वारा सल्फ़र ट्राइऑक्साइड में परिणत हो जाता है, जो जल में घुलकर सलफ़्यूरिक अम्ल बनता है। व्यापारिक सलफ़्यूरिक अम्ल शुद्ध नहीं होता। आंशिक शोधित अम्ल के प्रभाजित क्रिस्टलन से शुद्ध अम्ल प्राप्त होता है। सलफ़्यूरिक अम्ल जल के साथ मिलकर अनेक हाइड्रेट बनाता है, जिनमें सलफ़्यूरिक मोनोहाइड्रेट अपेक्षाकृत अधिक स्थायी होता है। इस गुण के कारण सांद्र सलफ़्यूरिक अम्ल उत्तम शुष्ककारक होता है। यह वायु से ही जल को नहीं खींचता वरन्‌ कार्बनिक पदार्थों से भी जल का अंश खींच लेता है। जल के अवशोषण में अत्यधिक ऊष्मा का क्षेपण होता है, जिससे अम्ल का विलयन बहुत गरम हो जाता है। सांद्र सलफ़्यूरिक अम्ल प्रबल ऑक्सीकारक होता है। ऑक्सीजन के निकल जाने से यह सलफ़्यूरस अम्ल बनता है, जिससे सल्फ़र डाइऑक्साइड निकलता है। अनेक धातुओं पर सलफ़्यूरिक अम्ल की क्रिया से सल्फ़र डाइऑक्साइड प्राप्त होता है। सलफ़्यूरिक अम्ल एक प्रबल अम्ल है। इसका रासायनिक सूत्र हा2 गं औ4 (H2SO4) है। यह रंगहीन तेल सदृश गाढ़ा द्रव होता है। शुद्ध अवस्था में 25 सें. ताप पर इसका घनत्व 1.834 है। इसका हिमांक 10.5 सें. है। सलफ़्यूरिक अम्ल का प्रयोग अनेक उद्योगों में होता है जिनमें से निम्नांकित प्रमुख हैं : (1) उर्वरक उद्योग में, जैसे सुपरफास्फेट, अमोनियम सल्फेट आदि के निर्माण में, (2) पेट्रोलियम तथा खनिज तेल के परिष्कार में, (3) विस्फोटक पदार्थों के निर्माण में, (4) कृत्रिम तंतुओं, जैसे रेयन तथा अन्य सूतों, के उत्पादन में, (5) पेंट, वर्णक, रंजक इत्यादि के निर्माण में, (6) फ़ॉस्फ़ोरस, हाइड्रोक्लोरिक अम्ल, नाइट्रिक अम्ल धावन सोडा तथा अन्य रसायनकों के निर्माण में, (7) इनैमल उद्योग, धातुओं पर जस्ता चढ़ाना तथा धातुकर्म उद्योगों में, (8) बैटरी बनाने में (9) ओषधियों के निर्माण में, (10) लौह एवं स्टील, प्लास्टिक तथा अन्य रासायनिक उद्योगों में। प्रयोगश्शालाओं में सलफ़्यूरिक अम्ल का प्रयोग विलायकों, निर्जलीकारकों (DESICCATING agent) तथा विश्लेषिक अभिकर्मकों के रूप में होता है। सलफ़्यूरिक अम्ल इतने अधिक एवं विभिन्न उद्योगों में प्रयुक्त होता है कि उन सभी का उल्लेख यहाँ संभव नहीं है। सलफ़्यूरिक अम्ल का जल में आयनीकरण होता है। इससे विलयन में हाइड्रोजन धनायन, बाइसल्फ़ेट तथा सल्फ़ेट ऋणायन बनते हैं। रासायनिक विश्लेषण की सामान्य रीतियों से सलफ़्यूरिक अम्ल में गंधक, ऑक्सीजन तथा हाइड्रोजन की उपस्थिति जानी जा सकती है। सलफ़्यूरिक अम्ल का संरचनासूत्र सामान्यत: निम्नांकित रूप में लिखा जाता है : । । Explanation: likhne mai bahut mehnat ki hai mark as branielist please

2.

Tanu Sulphuric Amla copperplate par Dala Jata Hai To Kya Hota Hai Hindi mein

Answer»

Answer:

प्राचीनकाल के कीमियागर एवं रसविद् आचार्यों को सलफ़्यूरिक अम्ल के संबंध में बहुत समय से पता था। उस समय हरे कसीस को गरम करने से यह अम्ल प्राप्त होता था। बाद में फिटकरी को तेज आँच पर गरम करने से भी यह अम्ल प्राप्त होने लगा। प्रारंभ में सलफ़्यूरिक अम्ल चूँकि हरे कसीस से प्राप्त होता था, अत: इसे 'कसीस का तेल' कहा जाता था। तेल शब्द का प्रयोग इसलिए हुआ कि इस अम्ल का प्रकृत स्वरूप तेल सा है।

प्राय: सभी आधुनिक उद्योगों में सलफ़्यूरिक अम्ल अत्यावश्यक होता है। अत: ऐसा माना जाता है कि किसी देश द्वारा सलफ़्यूरिक अम्ल का उपभोग उस देश के औद्योगीकरण का सूचक है। सलफ़्यूरिक अम्ल के विपुल उपभोगवाले देश अधिक समृद्ध माने जाते हैं।

प्रयोगशालाओं में निम्नांकित तीन रीतियों से अल्प मात्रा में सलफ़्यूरिक अम्ल तैयार किया जा सकता है : (1) सल्फ़र ट्राइऑक्साइड को जल में घुलाने से, (2) वायु के संसर्ग में सल्फ़्यूरस अम्ल के विलयन के मंद ऑक्सीकरण से और (3) सल्फ़र डाइऑक्साइड तथा हाइड्रोजन परॉक्साइड की सीधी क्रिया से। औद्योगिक स्तर पर सीस-कक्ष-विधि (LEAD chamber process) तथा संस्पर्श विधि (contact process) से अम्ल का उत्पादन होता है। सीस कक्ष विधि में जल की उपस्थिति में नाइट्रिक अम्ल द्वारा सल्फ़र डाइऑक्साइड के ऑक्सीकरण से अम्ल बनता है। यह क्रिया बड़े बड़े सीस कक्षों में संपन्न होती है अत: इसका नाम सीस-कक्ष-विधि पड़ा है। संस्पर्श विधि में सल्फ़र अथवा आयरन सल्फ़ाइड सदृश किसी सल्फ़ाइड के दहन से सल्फर डाइऑक्साइड पहले बनता है और वह प्लैटिनम धातुयुक्त ऐसबेस्टस उत्प्रेरक की उपस्थिति में वायु के ऑक्सीजन द्वारा सल्फ़र ट्राइऑक्साइड में परिणत हो जाता है, जो जल में घुलकर सलफ़्यूरिक अम्ल बनता है।

व्यापारिक सलफ़्यूरिक अम्ल शुद्ध नहीं होता। आंशिक शोधित अम्ल के प्रभाजित क्रिस्टलन से शुद्ध अम्ल प्राप्त होता है। सलफ़्यूरिक अम्ल जल के साथ मिलकर अनेक हाइड्रेट बनाता है, जिनमें सलफ़्यूरिक मोनोहाइड्रेट अपेक्षाकृत अधिक स्थायी होता है। इस गुण के कारण सांद्र सलफ़्यूरिक अम्ल उत्तम शुष्ककारक होता है। यह वायु से ही जल को नहीं खींचता वरन्‌ कार्बनिक पदार्थों से भी जल का अंश खींच लेता है। जल के अवशोषण में अत्यधिक ऊष्मा का क्षेपण होता है, जिससे अम्ल का विलयन बहुत गरम हो जाता है। सांद्र सलफ़्यूरिक अम्ल प्रबल ऑक्सीकारक होता है। ऑक्सीजन के निकल जाने से यह सलफ़्यूरस अम्ल बनता है, जिससे सल्फ़र डाइऑक्साइड निकलता है। अनेक धातुओं पर सलफ़्यूरिक अम्ल की क्रिया से सल्फ़र डाइऑक्साइड प्राप्त होता है।

सलफ़्यूरिक अम्ल एक प्रबल अम्ल है। इसका रासायनिक सूत्र हा2 गं औ4 (H2SO4) है। यह रंगहीन तेल सदृश गाढ़ा द्रव होता है। शुद्ध अवस्था में 25 सें. ताप पर इसका घनत्व 1.834 है। इसका हिमांक 10.5 सें. है। सलफ़्यूरिक अम्ल का प्रयोग अनेक उद्योगों में होता है जिनमें से निम्नांकित प्रमुख हैं : (1) उर्वरक उद्योग में, जैसे सुपरफास्फेट, अमोनियम सल्फेट आदि के निर्माण में, (2) पेट्रोलियम तथा खनिज तेल के परिष्कार में, (3) विस्फोटक पदार्थों के निर्माण में, (4) कृत्रिम तंतुओं, जैसे रेयन तथा अन्य सूतों, के उत्पादन में, (5) पेंट, वर्णक, रंजक इत्यादि के निर्माण में, (6) फ़ॉस्फ़ोरस, हाइड्रोक्लोरिक अम्ल, नाइट्रिक अम्ल धावन सोडा तथा अन्य रसायनकों के निर्माण में, (7) इनैमल उद्योग, धातुओं पर जस्ता चढ़ाना तथा धातुकर्म उद्योगों में, (8) बैटरी बनाने में (9) ओषधियों के निर्माण में, (10) लौह एवं स्टील, प्लास्टिक तथा अन्य रासायनिक उद्योगों में। प्रयोगश्शालाओं में सलफ़्यूरिक अम्ल का प्रयोग विलायकों, निर्जलीकारकों (DESICCATING agent) तथा विश्लेषिक अभिकर्मकों के रूप में होता है। सलफ़्यूरिक अम्ल इतने अधिक एवं विभिन्न उद्योगों में प्रयुक्त होता है कि उन सभी का उल्लेख यहाँ संभव नहीं है।

सलफ़्यूरिक अम्ल का जल में आयनीकरण होता है। इससे विलयन में हाइड्रोजन धनायन, बाइसल्फ़ेट तथा सल्फ़ेट ऋणायन बनते हैं। रासायनिक विश्लेषण की सामान्य रीतियों से सलफ़्यूरिक अम्ल में गंधक, ऑक्सीजन तथा हाइड्रोजन की उपस्थिति जानी जा सकती है। सलफ़्यूरिक अम्ल का संरचनासूत्र सामान्यत: निम्नांकित रूप में लिखा जाता है :

।

Explanation:

likhne mai bahut mehnat ki hai

mark as branielist

please

Discussion

3.	Say about anions and cations
Answer» ANSWER: Those with a NEGATIVE charge are CALLED ANIONS and those with a positive charge are called cations.

3.

Say about anions and cations

Answer»

ANSWER:

Those with a NEGATIVE charge are CALLED ANIONS and those with a positive charge are called cations.

Discussion

4.	Is+setting+of+curd+a+physical+or+chemical+changes?+justify+your+answer
Answer» *ANSWER: SETTING of curd is a chemical change...because we cannot get milk BACK from the curd again.. HOPE* IT *HELPS* *YOU*!!

4.

Is+setting+of+curd+a+physical+or+chemical+changes?+justify+your+answer

Answer»

ANSWER: SETTING of curd is a chemical change...because we cannot get milk BACK from the curd again..

HOPE IT HELPS YOU!!

Discussion

5.	Plssssssssss answer
Answer» ANSWER: ( a )OPTION answer hope it HELPS

5.

Plssssssssss answer

Answer»

ANSWER:

( a )OPTION answer

hope it HELPS

Discussion

6.	Number of Fe atoms in 100 g Haemoglobin if itcontains 0.33% Fe. (Atomic mass of Fe = 56)(1) 0.035 x 1023 (2) 35(3) 3.5 x 1023 (4) 7 * 108
Answer» ANSWER: CORRECT answer is OPTION 3

6.

Number of Fe atoms in 100 g Haemoglobin if itcontains 0.33% Fe. (Atomic mass of Fe = 56)(1) 0.035 x 1023 (2) 35(3) 3.5 x 1023 (4) 7 * 108

Answer»

ANSWER:

CORRECT answer is OPTION 3

Discussion

7.	ByA. A sample of pure water, whatever thesource always containsmass of oxygen and 11.1 % by mass ofhydrogen.a. 88.8 b. 18 c. 80 d. 16
Answer» ANSWER: 88.8 is correect answer

7.

ByA. A sample of pure water, whatever thesource always containsmass of oxygen and 11.1 % by mass ofhydrogen.a. 88.8 b. 18 c. 80 d. 16

Answer»

ANSWER:

88.8

is correect answer

Discussion

8.	B) The electronic configuration of an element X is 2,8,8,1. Without identifyingstatei. The charge on a simple ion of X ii. X is a oxidising or reducing agentand why?
Answer» Answer: (i) +1 (ii) reducing agent Explanation: i.the no. of electron in the VALANCE SHELL is ONE so it has loose 1 electron to attain octate so the CHARGE is +1. ii. since one electron is LOST it oxidises. so it is reducing agent.

8.

B) The electronic configuration of an element X is 2,8,8,1. Without identifyingstatei. The charge on a simple ion of X ii. X is a oxidising or reducing agentand why?

Answer»

Answer:

(i) +1 (ii) reducing agent

Explanation:

i.the no. of electron in the VALANCE SHELL is ONE so it has loose 1 electron to attain octate so the CHARGE is +1.

ii. since one electron is LOST it oxidises.

so it is reducing agent.

Discussion

9.	The number of oxygen atoms present in 14.6 gof magnesium bicarbonate [Mg(HCO3)2) is(1) 6NA (2) 0.6NA(3) NA (4) 0.5 NAPlz explain
Answer» Answer: 2 Explanation: Molecular wt of MAGNESIUM bicarbonate is =146 g So no. Of moles of it=14.6 ➗ 146=0.1 By molecular formula Moles of O atom in 1 MOLE of bicarbonate is 6 Hence no. Of moles of O atom in 0.1mole of bicarbonate is= 0.6 Hence no. Of atom in. 0.6mole O =0.6 NA

9.

The number of oxygen atoms present in 14.6 gof magnesium bicarbonate [Mg(HCO3)2) is(1) 6NA (2) 0.6NA(3) NA (4) 0.5 NAPlz explain

Answer»

Answer:

2

Explanation:

Molecular wt of MAGNESIUM bicarbonate is =146 g

So no. Of moles of it=14.6 ➗ 146=0.1

By molecular formula

Moles of O atom in 1 MOLE of bicarbonate is 6

Hence no. Of moles of O atom in 0.1mole of bicarbonate is= 0.6

Hence no. Of atom in. 0.6mole O =0.6 NA

Discussion

10.	C2H5-C-CH₃IUPAC name
Answer» ANSWER: C2H5-CH2-CH3....... BUTANE

10.

C2H5-C-CH₃IUPAC name

Answer»

ANSWER:

C2H5-CH2-CH3....... BUTANE

Discussion

11.	Give the material from which the following items can be made Altamira , cloths, books, utensils
Answer» Answer: 1. 2. CLOTH - fabric 3.books-pages 4. utentials-steal

11.

Give the material from which the following items can be made Altamira , cloths, books, utensils

Answer»

Answer:

1.

2. CLOTH - fabric

3.books-pages

4. utentials-steal

Discussion

12.	Which points defect may lower the density of an ionic crystal?
Answer» ANSWER: SCHOTTKY DEFECT or VACANCY defect

12.

Which points defect may lower the density of an ionic crystal?

Answer»

ANSWER:

SCHOTTKY DEFECT or VACANCY defect

Discussion

13.	СHЗ - СН = С Н - ОН IUPAC name
Answer» 1-propenol hope it HELPS

13.

СHЗ - СН = С Н - ОН IUPAC name

Answer»

1-propenol

hope it HELPS

Discussion

14.	Define of organic chemistry
Answer» Answer: The STUDY of carbon COMPOUND is CALLED organic chemistry or study of carbon compound and their reactions

14.

Define of organic chemistry

Answer»

Answer:

The STUDY of carbon COMPOUND is CALLED organic chemistry or study of carbon compound and their reactions

Discussion

15.	Define of organic chemstry
Answer» ANSWER: STUDY of carbon compound is CALLED organic chemistry

15.

Define of organic chemstry

Answer»

ANSWER:

STUDY of carbon compound is CALLED organic chemistry

Discussion

16.	Name a non metallic element found in a state liquid gases
Answer» Answer: fluorine,CHLORINE are non-metallic ELEMENTS in liquid STATE GASES

16.

Name a non metallic element found in a state liquid gases

Answer»

Answer:

fluorine,CHLORINE are non-metallic ELEMENTS in liquid STATE GASES

Discussion

17.	Name a metal which is liquid at room temperature
Answer» ANSWER: MERCURY (Hg) METAL is liquid at ROOM temperature

17.

Name a metal which is liquid at room temperature

Answer»

ANSWER:

MERCURY (Hg) METAL is liquid at ROOM temperature

Discussion

18.	1 atom of an element weighs 1.792x10-22 g. Theatomic weight of element is(1) 107.920 (2) 17.92(3) 1.192(4) 64
Answer» Answer: 1.107.920 Explanation: 1 ATOM CONTAINS 1.792×10^-22 G ATOMIC WEIGHT =1.792×10^-22×6.022×10^23 =107.920

18.

1 atom of an element weighs 1.792x10-22 g. Theatomic weight of element is(1) 107.920 (2) 17.92(3) 1.192(4) 64

Answer»

Answer:

1.107.920

Explanation:

1 ATOM CONTAINS 1.792×10^-22 G

ATOMIC WEIGHT =1.792×10^-22×6.022×10^23

=107.920

Discussion

19.	Nucleus of an atom is positively charged. give reasonfast please....
Answer» Answer: ACTUALLY the nucleus is positively charged as it MOSTLY CONTAINS PROTONS I think this is the answer

19.

Nucleus of an atom is positively charged. give reasonfast please....

Answer»

Answer:

ACTUALLY the nucleus is positively charged as it MOSTLY CONTAINS PROTONS I think this is the answer

Discussion

20.	Plss answer to this question
Answer» ANSWER: Hey mate here is ur answer Explanation: The answer is option(1).NH3

20.

Plss answer to this question

Answer»

ANSWER:

Hey mate here is ur answer

Explanation:

The answer is option(1).NH3

Discussion

21.	Page3- Why alkolis like sodium hydroxide andpotassium Hydroxide should not be leftexposed to air ?
Answer» ANSWER: EXPLANATION: Because they should STORE in KEROSENE

21.

Page3- Why alkolis like sodium hydroxide andpotassium Hydroxide should not be leftexposed to air ?

Answer»

ANSWER:

EXPLANATION:

Because they should STORE in KEROSENE

Discussion

22.	Which method is used for the separation of camphor and salta paticular method?
Answer» Answer: by method of sublimation.. we can SEPARATE CAMPHOR EASILY

22.

Which method is used for the separation of camphor and salta paticular method?

Answer»

Answer:

by method of sublimation.. we can SEPARATE CAMPHOR EASILY

Discussion

23.	Which method is used to obtain a pure liquid from a solution?
Answer» ANSWER: DISTILLATION can be used to GET a pure liquid from a solution containing several soluble solids in the liquid Explanation: if this HELP you mark me as brainiest

23.

Which method is used to obtain a pure liquid from a solution?

Answer»

ANSWER: DISTILLATION can be used to GET a pure liquid from a solution containing several soluble solids in the liquid

Explanation: if this HELP you mark me as brainiest

Discussion

24.	6. Write the IUPAC name ofCHzCH2CH==CH - C- CH3
Answer» ANSWER: here's your answer Pent 2-ene.

24.

6. Write the IUPAC name ofCHzCH2CH==CH - C- CH3

Answer»

ANSWER:

here's your answer

Pent 2-ene.

Discussion

25.	At what temperature the RMS velocity of oxygenwill be same as that of methane at 27°C?
Answer» ANSWER: it is ALSO so MUCH EASY. WAIT

25.

At what temperature the RMS velocity of oxygenwill be same as that of methane at 27°C?

Answer»

ANSWER:

it is ALSO so MUCH EASY. WAIT

Discussion

26.	Why alkali like Sodium Hydroxide andpotassium Hydroxide should not be leftexposed to air ?
Answer» Answer: The ALKALI will GET oxidised LEADING to the FORMATION of oxides

26.

Why alkali like Sodium Hydroxide andpotassium Hydroxide should not be leftexposed to air ?

Answer»

Answer:

The ALKALI will GET oxidised LEADING to the FORMATION of oxides

Discussion

27.	Give reasons . " why plastic containers are used as storing devices"?
Answer» Answer: Plastic containers are used as storage devices because it wont GET reacted with the substance it STORES. Metals can CAUSE some reaction if the substance STORED is reactive. Mark my ans as brainliest

27.

Give reasons . " why plastic containers are used as storing devices"?

Answer»

Answer:

Plastic containers are used as storage devices because it wont GET reacted with the substance it STORES. Metals can CAUSE some reaction if the substance STORED is reactive.

Mark my ans as brainliest

Discussion

28.	Prevention and reduction of climate change
Answer» Promote greenery Reduce plastic waste Be more responsive Segregation of [email PROTECTED] before disposal Use REUSABLE material

Discussion

29.	Where is hbr and peroxide used in formation of haloalkane?
Answer» Answer: HBR & peroxide USED in ANTI markownokoff's RULES

29.

Where is hbr and peroxide used in formation of haloalkane?

Answer»

Answer:

HBR & peroxide USED in ANTI markownokoff's RULES

Discussion

30.	What were the defects and anomalies in mendeleeff periodic table and how are they resolved by Moseley
Answer» Answer: M.P.T couldnt assign CORRECT posit^n to hydrogen cobalt with higher atomic mass was placed before nickel mendeleeve IGNORED exact atomic mass of ELEMENTS to place them with elements of same PROPERTIES assuming that they were not PRECISE

30.

What were the defects and anomalies in mendeleeff periodic table and how are they resolved by Moseley

Answer»

Answer:

M.P.T couldnt assign CORRECT posit^n to hydrogen
cobalt with higher atomic mass was placed before nickel
mendeleeve IGNORED exact atomic mass of ELEMENTS to place them with elements of same PROPERTIES assuming that they were not PRECISE

Discussion

31.	How many hydroxal groups are present in oleum...
Answer» Answer: 1 Explanation: BENZENE RING with ONE OH GROUP

31.

How many hydroxal groups are present in oleum...

Answer»

Answer:

1

Explanation:

BENZENE RING with ONE OH GROUP

Discussion

32.	19. Which of the following ions have minimum value offlocculating power?(a) PO4^3- (b) SO4^2- (c) So3^2-(d) NO3-
Answer» Answer: NO3- Explanation: Flocculating is defined as the precipitating ability of an ion, i.e how easily it can precipitate a sol. Since all the options given are negatively CHARGED ions, IM assuming the sol in question is a positively charged sol. According to Hardy-Schulz rule , the greater is the valence of the oppositely charged ion of the electrolyte added to a colloidal solution, the faster is the COAGULATION of the colloidal solution. In this case, the ion with the MAXIMUM charge is PO4^3-, and the ONE with the least charge is NO3-. Therefore, the ion with minimum value of flocculating power is NO3-

32.

19. Which of the following ions have minimum value offlocculating power?(a) PO4^3- (b) SO4^2- (c) So3^2-(d) NO3-

Answer»

Answer:

NO3-

Explanation:

Flocculating is defined as the precipitating ability of an ion, i.e how easily it can precipitate a sol.

Since all the options given are negatively CHARGED ions, IM assuming the sol in question is a positively charged sol.

According to Hardy-Schulz rule , the greater is the valence of the oppositely charged ion of the electrolyte added to a colloidal solution, the faster is the COAGULATION of the colloidal solution.

In this case, the ion with the MAXIMUM charge is PO4^3-, and the ONE with the least charge is NO3-.

Therefore, the ion with minimum value of flocculating power is NO3-

Discussion

33.	What is conjugation in chemistry?
Answer» <P>Answer: In CHEMISTRY, a conjugated system is a system of connected p orbitals with delocalized electrons in a molecule, which in general lowers the overall energy of the molecule and increases stability. It is conventionally represented as having alternating SINGLE and multiple bonds.

33.

What is conjugation in chemistry?

Answer»

<P>Answer:

In CHEMISTRY, a conjugated system is a system of connected p orbitals with delocalized electrons in a molecule, which in general lowers the overall energy of the molecule and increases stability. It is conventionally represented as having alternating SINGLE and multiple bonds.

Discussion

34.	AIF3, dissolves in solution of NaF forming(1) NaAlF3(2) Na3AlF6(3) Na2AIF6(4) Al3NaF6plzz rplyy soon
Answer» ANSWER: (4) AI3NaF6 Please MARK me BRAINLIEST.

Discussion

35.	6 Ag+ (aq) + Fe (s) →Fe2+ (aq) + AgBalance it
Answer» Explanation: 6Ag+Fe GIVE Fe2+Ag 6Ag+2Fe give Fe2+6Ag Balance CHEMICAL EQUATION

35.

6 Ag+ (aq) + Fe (s) →Fe2+ (aq) + AgBalance it

Answer»

Explanation:

6Ag+Fe GIVE Fe2+Ag

6Ag+2Fe give Fe2+6Ag

Balance CHEMICAL EQUATION

Discussion

36.	A saturated solution of potassium nitrate is allowed to cool temperature what do you observe
Answer» crystallization crystals of definite geometric SHAPE corresponding to TYPE of COMPOUND in the solution

36.

A saturated solution of potassium nitrate is allowed to cool temperature what do you observe

Answer»

crystallization

crystals of definite geometric SHAPE corresponding to TYPE of COMPOUND in the solution

Discussion

37.	AIF, dissolves in solution of NaF forming(1) NaAlF3(2) NazAlF6(3) Na,AlF6(4) Al2NaF6plzz rplyy soon
Answer» Not UNDERSTANDING PLZ

Discussion

38.	Please answer q-24 and 25Please answer it please
Answer»

Discussion

39.	Why power sharing is important in points
Answer»

Discussion

40.	Where is hbr and peroxide in haloalkane and haloarene?
Answer» ANSWER: HBr & PEROXIDE used in ANTI markownokoff's RULES

40.

Where is hbr and peroxide in haloalkane and haloarene?

Answer»

ANSWER:

HBr & PEROXIDE used in ANTI markownokoff's RULES

Discussion

41.	Equations to show how metals react with acids
Answer» Answer: 2na + 2H cl____ 2nacl + H2

41.

Equations to show how metals react with acids

Answer»

Answer:

2na + 2H cl____ 2nacl + H2

Discussion

42.	When 22.4 litres of h2 is mixed with11.2 litres of cl2?
Answer» Answer: 22.4l of HCl formed Explanation: equ: CL2 + H2 -> 2HCL @stp 22.4l 22.4 2×22.4l given: 11.2l 22.4l x (take Cl2 & Hcl ) x= 44.8×11.2/22.4 =22.4l

42.

When 22.4 litres of h2 is mixed with11.2 litres of cl2?

Answer»

Answer:

22.4l of HCl formed

Explanation:

equ: CL2 + H2 -> 2HCL @stp 22.4l 22.4 2×22.4l

given: 11.2l 22.4l x

(take Cl2 & Hcl ) x= 44.8×11.2/22.4

=22.4l

Discussion

43.	Oxidation no. of 'V' in Cs4 Na[HV10O28]
Answer» ANSWER: EXPLANATION: VERIFY the FOLLOWING ATTACHMENT.

43.

Oxidation no. of 'V' in Cs4 Na[HV10O28]

Answer»

ANSWER:

EXPLANATION:

VERIFY the FOLLOWING ATTACHMENT.

Discussion

44.	If the rate of a reaction is 5 at 10°C then on increasing the temperature to 30°C new rate is ??Explain the fact behind it .
Answer» ANSWER: $\huge\underline\pink{\tt Hey\:Mate}$ For every 10°C RISE of temperature RATE constant doubles . For 20°C rise (30° - 10° = 20°C) of temperature rate constant becomes 4 times i.e K2 = 4K1 K2 = 4×5 Hence NEW rate (K2) is :- K2 = 20°C Hope this will help uh!!

44.

If the rate of a reaction is 5 at 10°C then on increasing the temperature to 30°C new rate is ??Explain the fact behind it .

Answer»

ANSWER:

$\huge\underline\pink{\tt Hey\:Mate}$

For every 10°C RISE of temperature RATE constant doubles .

For 20°C rise (30° - 10° = 20°C) of temperature rate constant becomes 4 times

i.e K2 = 4K1

K2 = 4×5

Hence NEW rate (K2) is :-

K2 = 20°C

Hope this will help uh!!

Discussion

45.	What is the full form of ip in inorganic chemistry?
Answer» ANSWER: INTERNATIONAL NON - propiretary

45.

What is the full form of ip in inorganic chemistry?

Answer»

ANSWER:

INTERNATIONAL NON - propiretary

Discussion

46.	What is the effect of stearic acid in natural rubber?
Answer» Answer: Stearic acid is INVOLVED in almost all rubber compounds. It is used in relatively low AMOUNTS (up to 3.0 phr) but has multifunctional effect on their properties and PROCESSING. The function of SA as a softener and a filter DISPERSING agent within rubber compounds is examined.

46.

What is the effect of stearic acid in natural rubber?

Answer»

Answer:

Stearic acid is INVOLVED in almost all rubber compounds. It is used in relatively low AMOUNTS (up to 3.0 phr) but has multifunctional effect on their properties and PROCESSING. The function of SA as a softener and a filter DISPERSING agent within rubber compounds is examined.

Discussion

47.	What is the effect of paraffin oil in natural rubber?
Answer» ANSWER: PLZ MARK IT AS A BRAINLIEST

47.

What is the effect of paraffin oil in natural rubber?

Answer»

ANSWER:

PLZ MARK IT AS A BRAINLIEST

Discussion

48.	What is the effect of ammonium nitrate uses in natural rubber?
Answer» The EFFECT of AMMONIA treatment in field natural rubber (NR) LATEX with different storage period time on the PROPERTIES of concentrated NR latex and stability of skim latex was investigated.

Discussion

49.	What is the effect of dicumyl peroxide in natural rubber?
Answer» ANSWER: PLZ MARK IT AS A BRAINLIEST PLZ

49.

What is the effect of dicumyl peroxide in natural rubber?

Answer»

ANSWER:

PLZ MARK IT AS A BRAINLIEST PLZ

Discussion

50.	What is the effect of ammonium chloride uses in natural rubber?
Answer» The effect of AMMONIA treatment in field natural rubber (NR) latex with different storage period time on the properties of concentrated NR latex and stability of SKIM latex was investigated.

50.

What is the effect of ammonium chloride uses in natural rubber?

Answer»

The effect of AMMONIA treatment in field natural rubber (NR) latex with different storage period time on the properties of concentrated NR latex and stability of SKIM latex was investigated.

Discussion

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If the rate of a reaction is 5 at 10°C then on increasing the temperature to 30°C new rate is ??Explain the fact behind it .​

Hope this will help uh!!

What is the full form of ip in inorganic chemistry?

What is the effect of stearic acid in natural rubber?

What is the effect of paraffin oil in natural rubber?

PLZ MARK IT AS A BRAINLIEST

What is the effect of ammonium nitrate uses in natural rubber?

What is the effect of dicumyl peroxide in natural rubber?

PLZ MARK IT AS A BRAINLIEST PLZ

What is the effect of ammonium chloride uses in natural rubber?

Plssssssssss answer

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Name a metal which is liquid at room temperature

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Plss answer to this question

Page3- Why alkolis like sodium hydroxide andpotassium Hydroxide should not be leftexposed to air ?

6. Write the IUPAC name ofCHzCH2CH==CH - C- CH3

At what temperature the RMS velocity of oxygenwill be same as that of methane at 27°C?

Why alkali like Sodium Hydroxide andpotassium Hydroxide should not be leftexposed to air ?

Give reasons . " why plastic containers are used as storing devices"?

How many hydroxal groups are present in oleum...

19. Which of the following ions have minimum value offlocculating power?(a) PO4^3- (b) SO4^2- (c) So3^2-(d) NO3-

What is conjugation in chemistry?

AIF3, dissolves in solution of NaF forming(1) NaAlF3(2) Na3AlF6(3) Na2AIF6(4) Al3NaF6plzz rplyy soon

A saturated solution of potassium nitrate is allowed to cool temperature what do you observe

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Equations to show how metals react with acids

Oxidation no. of 'V' in Cs4 Na[HV10O28]

If the rate of a reaction is 5 at 10°C then on increasing the temperature to 30°C new rate is ??Explain the fact behind it .