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UP Board Class 12 Chemistry Second Question Paper 2018, check here complete paper analysis

Mar 5, 2018 15:48 IST
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Chemistry Paper Second Analysis
Chemistry Paper Second Analysis

UP Board Class 12th Chemistry second paper was conducted on February 22, 2018 from 2:00 pm to 5:15 pm. Students who appeared for paper code 375(GI) for physical and organic chemistry can check here complete paper analysis which mentions exam pattern, marking scheme, type of questions and difficulty level as well as some example questions.

Key features of UP Board class 12th chemistry second paper:

  • Students were required to cross-verify the complete test paper in 15 minutes before starting writing answers. The total exam duration for UP Board Class 12th Chemistry paper was of 3 hours 15 minutes.
  • There were a total of 12 questions, however, the questions were further divided into parts and the total marks allotted to all questions were 35
  • Students were required to compulsorily attempt all the questions.
  • Each question me
  • Students were required to solve numerical based questions in step-by-step format and they had to mention each step of calculation.
  • Also, students had to write chemical equations wherever required in the answers.

Marking Scheme for UP Board class 12th Chemistry Paper II:

Type of questions

Number of questions*marks allotted

Marks

Multiple Choice Questions

5*1

5

Very short answer types

8*1

8

Short answer types

8*2

16

Long answer types

2*3

6

Total

23

35

UP Board Class 12 Chemistry First Question Paper 2018

Example questions from UP Board class 12th chemistry paper II:

Question: (a.) The boiling point of pure acetone is 56.38 C. When 0.707 gm of an organic compound is dissolved in 10 gm of acetone, there is elevation 56.88 C in boiling point. What is the molecular weight of compound? Molecular elevation constant (Km) for acetone is 16.7.

(b.) Explain saytzeff’s Rule and Hunsdicker Reaction with the help of chemical reactions.

(c.) Explain the amphoteric nature of amino acid.

(d.) Explain with example the addition polymer and write the uses of polythene

प्रश्न: (क.) 0.707 ग्राम कार्बनिक यौगिक को 10 ग्राम एसीटोन में घोलने पर क्वथनांक वृद्धि 56.88 C तक पाया गया| कार्बनिक यौगिक का अणुभार ज्ञात कीजिए| एसीटोन का क्वथनांक 56.38 C तथा आणविक उत्रयण स्थिरांक (Km) = 16.7.

(ख.)सैत्जेफ नियम तथा हुन्सडीकर अभिक्रिया को रासायनिक समीकरण द्वारा समझाइए|

(ग.) एमिनो अम्ल का उभयधर्मी प्रकृति की व्याख्या कीजिए|

(घ.) योगात्मक बहुलक को उदहारण द्वारा समझाइए तथा पालीथीन का उपयोग लिखिए|

Question: There are four alternatives for each part of this question. Select the correct alternative and write it in the answer-book:

a) Mole fraction of 1.8 gram glucose in 90 gram water is

(i) 0.19
(ii) 0.019
(iii) 0.0019
(iv) 0.00019

प्रश्न: इस प्रश्न के प्रत्येक खण्ड में चार  विकल्प दिए गए हैं| सही विकल्प चुनकर उसे अपनी उत्तर-पुस्तिका में लिखिए:

(क.) 90 ग्राम जल में 1.8 ग्राम ग्लूकोज का मोल प्रभाज है -

(i) 0.19

(ii) 0.019

(iii) 0.0019

(iv) 0.00019

Question: Describe with chemical equation the laboratory method of preparation of phenol and write the equation of following reactions

i) Riemer-Tiemann reaction

ii) Kolbe reaction

Or

What happens when (write only chemical equation only)-

i) Ethyl alcohol reacts with conc. H2SO4 at different temperatures?

ii) Methyl alcohol reacts with acetyle chloride?

iii)  Ethyl alcohol alcohol is heated with bleaching powder?

प्रश्न: प्रयोगशाला में फिनॉल बनाने की विधि का रासायनिक समीकरण द्वारा वर्णन कीजिए तथा निम्न अभिक्रिया का समीकरण लिखिए :

i) रीमर-टीमान अभिक्रिया

ii) कोलबे अभिक्रिया

अथवा

क्या होता जबकि (केवल रासायनिक समीकरण लिखिए)-

i) एथिल एल्कोहल भिन्न ताप पर संदर सल्फुरिक अम्ल के साथ क्रिया करता है?

ii) मेथिल एल्कोहल, एसिटिल क्लोराइड के साथ अभिक्रिया करता है ?

iii) एथिल एल्कोहल को विरंजन चूर्ण के साथ गर्म किया जाता है ?

Question: Describe with diagram the laboratory method for the preparation of formic acid. Write down its chemical equation of reaction with Fehling solution. Also write all equations of the reactions related to above.

OR

How will you obtain? (Write only chemical equation)

i) Urotropine (hexamethylene tetra amine) from formaldehyde

ii) Acetone from Acetaldehyde

iii) Formic acid from Acetic acid

प्रश्न : फार्मिक अम्ल बनाने की प्रयोगशाला विधि का सचित्र वर्णन कीजिए| इसकी फेहलिंग विलयन के साथ अभिक्रिया का रासायनिक समीकरण लिखिए| सभी सम्बंधित अभिक्रिया का समीकरण भी लिखिए|

अथवा

कैसे बनायेंगे ? (केवल समीकरण लिखिए)

i) फार्मलडीहाइड से यूरोट्रोपीन (हेक्सा मेथिलिन टेट्राएमीन)

ii) एसिटलडीहाइड से एसीटोन

iii) एसिटिक अम्ल से फारमिक अम्ल

Download complete second paper for UP Board class 12th chemistry exam

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