JEE Main Organic — Biomolecules & Practical – Topic Test
JEE Main Organic — Biomolecules & Practical – Topic Test is an online topic test in the JEE Main pattern, covering Organic — Biomolecules & Practical. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Organic — Biomolecules & Practical | 30 |
Difficulty: 15 medium · 15 hard
Organic — Biomolecules & Practical MCQ questions with answers
The first 3 of 30 questions. Unlock the series for the rest, each with a solution.
Q1. The crimson-red colouration imparted to a non-luminous flame in the flame test is characteristic of which one of the following cations?
ज्वाला परीक्षण में अदीप्त ज्वाला को प्रदान किया जाने वाला गहरा-लाल (क्रिमसन-लाल) रंग निम्नलिखित में से किस धनायन का अभिलक्षणिक है?
- A. Barium / बेरियम
- B. Strontium / स्ट्रॉन्शियम
- C. Calcium / कैल्शियम
- D. Potassium / पोटैशियम
Solution
Strontium gives a crimson-red flame. Calcium gives brick-red, barium apple/pale green and potassium a violet (lilac) flame.
स्ट्रॉन्शियम गहरी-लाल (क्रिमसन-लाल) ज्वाला देता है। कैल्शियम ईंट-लाल, बेरियम सेब/हल्के हरे रंग की और पोटैशियम बैंगनी (लाइलैक) ज्वाला देता है।
Q2. In the confirmatory test for halide ions with silver nitrate, the yellow precipitate that is insoluble in ammonium hydroxide corresponds to:
सिल्वर नाइट्रेट के साथ हैलाइड आयनों के पुष्टिकरण परीक्षण में, वह पीला अवक्षेप जो अमोनियम हाइड्रॉक्साइड में अविलेय है, निम्नलिखित से संगत है:
- A. Silver sulphide / सिल्वर सल्फाइड
- B. Silver bromide / सिल्वर ब्रोमाइड
- C. Silver chloride / सिल्वर क्लोराइड
- D. Silver iodide / सिल्वर आयोडाइड
Solution
AgI is yellow and insoluble in NH4OH. AgCl is white and readily soluble in NH4OH, while AgBr is pale yellow and only sparingly soluble.
AgI पीला और NH4OH में अविलेय है। AgCl श्वेत और NH4OH में सहजता से विलेय है, जबकि AgBr हल्का पीला और केवल अल्प विलेय है।
Q3. Which of the following is an essential amino acid (one that cannot be synthesised in the human body)?
निम्नलिखित में से कौन एक आवश्यक (एसेंशियल) ऐमीनो अम्ल है (जिसका संश्लेषण मानव शरीर में नहीं हो सकता)?
- A. Leucine / ल्यूसीन
- B. Alanine / ऐलानीन
- C. Serine / सेरीन
- D. Glycine / ग्लाइसीन
Solution
Leucine must be obtained from the diet and is essential, whereas alanine, serine and glycine are non-essential amino acids that the body can synthesise.
ल्यूसीन आहार से प्राप्त करना आवश्यक है और यह एक आवश्यक ऐमीनो अम्ल है, जबकि ऐलानीन, सेरीन और ग्लाइसीन अनावश्यक (नॉन-एसेंशियल) ऐमीनो अम्ल हैं जिन्हें शरीर संश्लेषित कर सकता है।
Frequently asked questions
How many questions are in the JEE Main Organic — Biomolecules & Practical – Topic Test?
30 questions for 30 marks, to be answered in 30 minutes.
Is there negative marking in the JEE Main Organic — Biomolecules & Practical – Topic Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Organic — Biomolecules & Practical – Topic Test cover?
Organic — Biomolecules & Practical (30 questions).
Is the JEE Main Organic — Biomolecules & Practical – Topic Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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