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The mole fraction of urea in an aqueous urea solution containing 900 g of water is 0.05. If the density of the solution is 1.2 g cm-3, the molarity of urea solution is ____.

(Given data: Molar masses of urea and water are 60 g mol–1 and 18 g mol–1, respectively)

2.98

1

2

3

View Answer & Solution

Correct Answer: B (1)B

Mole fraction of urea in aqueous solution = 0.05

0.05 = Moles of urea / Moles of urea + 900 / 18

0.05 (Moles of urea) + 2.5 = Moles of urea

Moles of Urea = 2.63 moles

Mass of urea = 2.63 × 60 = 158 gm

Mass of solution = 158 + 900 = 1058 gm

Density = 1.2 g cm3

Volume of solution = 1058 / 1.2

= 881.67 ml

Molarity = nsolute / Vsolution(innL) × 1000

= 2.63 / 881.67 × 1000

= 2.98

sadsasasasas

asasasas

sasasasasasa

sasasasasasa

asasasasasasa

View Answer & Solution

Correct Answer: A (asasasas)A

For the reaction 2A + C -> B + 3D , the differential rate law can be written as

\(\frac{1}{2} \frac{d[A]}{d t}=\frac{-d[B]}{d t}=k[A]^x[B]^y\)

\(\frac{-d[A]}{d t}=\frac{1}{3} \frac{d[D]}{d t}=k[A]^x[D]^y\)

\(-\frac{1}{2} \frac{d[A]}{d t}=\frac{-d[C]}{d t}=k[A]^x[C]^y\)

\(-\frac{1}{2} \frac{d[A]}{d t}=\frac{d[B]}{d t}=k[A]^x[B]^y\)

रिएक्शन 2A + C -> B + 3D के लिए, डिफरेंशियल रेट लॉ को ऐसे लिखा जा सकता है

\(\frac{1}{2} \frac{d[A]}{d t}=\frac{-d[B]}{d t}=k[A]^x[B]^y\)

\(\frac{-d[A]}{d t}=\frac{1}{3} \frac{d[D]}{d t}=k[A]^x[D]^y\)

\(-\frac{1}{2} \frac{d[A]}{d t}=\frac{-d[C]}{d t}=k[A]^x[C]^y\)

\(-\frac{1}{2} \frac{d[A]}{d t}=\frac{d[B]}{d t}=k[A]^x[B]^y\)

View Answer & Solution

Correct Answer: C (\(-\frac{1}{2} \frac{d[A]}{d t}=\frac{-d[C]}{d t}=k[A]^x[C]^y\))

SSC CGL S9 SELECTION BATCH

The product A, B and C respectively

गुणनफल क्रमशः A, B और C

View Answer & Solution

Correct Answer: A

The incorrect statement among the following is

Amylopectin is water soluble

Lactose is composed of β - D - galactose and β - D - glucose joined by 1,4-glycosidic linkage

Sucrose is a non-reducing sugar

Glycine is optically inactive amino acid

इनमें से गलत बात यह है

एमाइलोपेक्टिन पानी में घुलने वाला है

लैक्टोज β - D - गैलेक्टोज और β - D - ग्लूकोज से बना है जो 1,4-ग्लाइकोसिडिक लिंकेज से जुड़े होते हैं

सुक्रोज एक नॉन-रिड्यूसिंग शुगर है

ग्लाइसिन ऑप्टिकली इनएक्टिव अमीनो एसिड है

View Answer & Solution

Correct Answer: A (Amylopectin is water soluble)A (एमाइलोपेक्टिन पानी में घुलने वाला है)

Which of the following facts about the complex \(\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3\) is wrong?

The complex involves d²sp³ hybridisation and is octahedral in shape

The complex is paramagnetic

The complex is an outer orbital complex

The complex gives white precipitate with silver nitrate solution

कॉम्प्लेक्स के बारे में नीचे दिए गए फैक्ट्स में से कौन सा \(\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3\) गलत है?

कॉम्प्लेक्स में d²sp³हाइब्रिडाइजेशन शामिल है और इसका आकार ऑक्टाहेड्रल है

कॉम्प्लेक्स पैरामैग्नेटिक है

कॉम्प्लेक्स एक आउटर ऑर्बिटल कॉम्प्लेक्स है

कॉम्प्लेक्स सिल्वर नाइट्रेट सॉल्यूशन के साथ सफेद प्रेसिपिटेट देता है

View Answer & Solution

Correct Answer: C (The complex is an outer orbital complex)C (कॉम्प्लेक्स एक आउटर ऑर्बिटल कॉम्प्लेक्स है)

Rajasthan Exams Pass Pro

In the given reaction [x]

दी गई अभिक्रिया में [x]

View Answer & Solution

Correct Answer: C

–3.2 kJ

–6.9 kJ

–13.8 kJ

–19.6 kJ

View Answer & Solution

Correct Answer: B (–6.9 kJ)B

What is the correct relation in between electron affinity (Ae)& electron gain enthalpy (Δ_{_eg}H)

View Answer & Solution

Correct Answer: C

CET Graduation foundation 2026

What are the major products from the following reaction ?

नीचे दिए गए रिएक्शन से मुख्य प्रोडक्ट क्या हैं?

View Answer & Solution

Correct Answer: B

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