यदि \(K_f = 1.86\) और मोललता (0.5) हो, तो अवियोजित विलेय के लिए हिमांक अवनमन कितना होगा?
If \(K_f = 1.86\) and molality is (0.5), what is the depression in freezing point for a non-dissociating solute?
#freezing point depression
#numerical
#Kf
A (0.93)
B (1.86)
C (3.72)
D (0.50)
Explanation opens after your attempt
Step 1
Concept
अवियोजित विलेय के लिए \( \Delta T_f = K_f m \) लगाएँ। / For a non-dissociating solute, use \( \Delta T_f = K_f m \).
Step 2
Why this answer is correct
\(1.86 \times 0.5 = 0.93\) मिलता है। / \(1.86 \times 0.5 = 0.93\).
Step 3
Exam Tip
गणना में (i) तभी लगाएँ जब वियोजन या सहयोजन दिया हो। / Use (i) only when dissociation or association is mentioned.
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यदि \(K_f = 1.86\) और \(\Delta T_f = 0.93\) हो, तो मोललता क्या होगी?
If \(K_f = 1.86\) and \(\Delta T_f = 0.93\), what is the molality?
#freezing point depression
#molality calculation
#Kf
A \(0.25\)
B \(0.5\)
C \(1.0\)
D \(2.0\)
Explanation opens after your attempt
Correct Answer
B. \(0.5\)
Step 1
Concept
\(\Delta T_f = K_fm\) से \(m = \frac{\Delta T_f}{K_f}\)। / From \(\Delta T_f = K_fm\), \(m = \frac{\Delta T_f}{K_f}\).
Step 2
Why this answer is correct
\(\frac{0.93}{1.86} = 0.5\)। / \(\frac{0.93}{1.86} = 0.5\).
Step 3
Exam Tip
संख्या छोटी हो तो भी अनुपात को ध्यान से निकालें। / Calculate the ratio carefully even when numbers are small.
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यदि मोललता (0.4) और \(K_f = 2.0\) हो, तो \(\Delta T_f\) कितना होगा?
If molality is (0.4) and \(K_f = 2.0\), what is \(\Delta T_f\)?
#freezing point depression
#Kf
#molality calculation
A \(0.2\)
B \(0.8\)
C \(2.4\)
D \(5.0\)
Explanation opens after your attempt
Correct Answer
B. \(0.8\)
Step 1
Concept
\(\Delta T_f = K_f m\) प्रयोग करें। / Use \(\Delta T_f = K_f m\).
Step 2
Why this answer is correct
\(2.0 \times 0.4 = 0.8\)। / \(2.0 \times 0.4 = 0.8\).
Step 3
Exam Tip
पहले मोललता सही निकालें, फिर ताप में कमी निकालें। / First find molality correctly, then calculate depression.
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यदि \(K_f = 1.86\) और (m = 0.25) हो, तो \(\Delta T_f\) का मान कितना होगा?
If \(K_f = 1.86\) and (m = 0.25), what is the value of \(\Delta T_f\)?
#delta Tf calculation
#Kf
#molality
A \(0.465\)
B \(1.86\)
C \(2.11\)
D \(7.44\)
Explanation opens after your attempt
Correct Answer
A. \(0.465\)
Step 1
Concept
हिमांक में कमी के लिए \(\Delta T_f = K_f m\) है। / For freezing point depression, use \(\Delta T_f = K_f m\).
Step 2
Why this answer is correct
\(1.86 \times 0.25 = 0.465\)। / \(1.86 \times 0.25 = 0.465\).
Step 3
Exam Tip
दशमलव वाले प्रश्न में गुणा सावधानी से करें। / In decimal calculations, multiply carefully.
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एक मोलल विलयन में यदि विलेय अविद्युत अपघट्य है, तो हिमांक में कमी किसके बराबर होगी?
For a one molal solution of a non-electrolyte, depression in freezing point will be equal to what?
#one molal solution
#Kf
#freezing point depression
A \(K_f\)
B \(K_b\)
C \(R\)
D \(T\)
Explanation opens after your attempt
Correct Answer
A. \(K_f\)
Step 1
Concept
\(\Delta T_f = K_f m\) है। / \(\Delta T_f = K_f m\).
Step 2
Why this answer is correct
एक मोलल विलयन में (m = 1) है। / In a one molal solution, (m = 1).
Step 3
Exam Tip
इसलिए हिमांक में कमी \(K_f\) के बराबर होगी। / Therefore freezing point depression equals \(K_f\).
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यदि \(\Delta T_f = 0.9\) और \(K_f = 1.8\) हो, तो मोललता कितनी होगी?
If \(\Delta T_f = 0.9\) and \(K_f = 1.8\), what is the molality?
#molality calculation
#freezing point
#Kf
A \(0.5\)
B \(2\)
C \(1.62\)
D \(2.7\)
Explanation opens after your attempt
Correct Answer
A. \(0.5\)
Step 1
Concept
\(\Delta T_f = K_f m\) से \(m = \frac{\Delta T_f}{K_f}\)। / From \(\Delta T_f = K_f m\), \(m = \frac{\Delta T_f}{K_f}\).
Step 2
Why this answer is correct
\(\frac{0.9}{1.8} = 0.5\)। / \(\frac{0.9}{1.8} = 0.5\).
Step 3
Exam Tip
भाग करते समय दशमलव को ध्यान से रखें। / Handle decimal values carefully.
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यदि \(K_f = 1.86\) और मोललता (0.5) हो, तो \(\Delta T_f\) कितना होगा?
If \(K_f = 1.86\) and molality is (0.5), what is \(\Delta T_f\)?
#delta Tf
#Kf
#molality
#numerical
A \(0.93\)
B \(1.86\)
C \(2.36\)
D \(3.72\)
Explanation opens after your attempt
Correct Answer
A. \(0.93\)
Step 1
Concept
हिमांक में कमी के लिए \(\Delta T_f = K_f m\) है। / For freezing point depression, use \(\Delta T_f = K_f m\).
Step 2
Why this answer is correct
\(1.86 \times 0.5 = 0.93\)। / \(1.86 \times 0.5 = 0.93\).
Step 3
Exam Tip
आधी मोललता पर कमी भी आधी हो जाती है। / At half molality, depression becomes half.
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हिमांक में कमी के सूत्र में कौन-सा स्थिरांक प्रयोग होता है?
Which constant is used in the formula for depression in freezing point?
#Kf
#freezing point depression
#cryoscopic constant
A \(K_f\)
B \(K_b\)
C \(R\)
D \(\pi\)
Explanation opens after your attempt
Correct Answer
A. \(K_f\)
Step 1
Concept
हिमांक में कमी के लिए \(\Delta T_f = K_f m\) प्रयोग होता है। / For freezing point depression, \(\Delta T_f = K_f m\) is used.
Step 2
Why this answer is correct
इसमें \(K_f\) विलायक का हिमांक स्थिरांक है। / Here \(K_f\) is the freezing point constant of the solvent.
Step 3
Exam Tip
\(K_f\) को ठंड या जमने से जोड़कर याद रखें। / Link \(K_f\) with freezing to remember it.
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हिमांक अवनमन स्थिरांक को किस प्रतीक से दर्शाते हैं?
Which symbol represents the freezing point depression constant?
#Kf
#freezing point constant
#colligative properties
A \(K_f\)
B \(K_b\)
C \( \pi \)
D (R)
Explanation opens after your attempt
Correct Answer
A. \(K_f\)
Step 1
Concept
हिमांक अवनमन स्थिरांक के लिए \(K_f\) प्रयोग होता है। / The freezing point depression constant is represented by \(K_f\).
Step 2
Why this answer is correct
\(K_b\) क्वथनांक उन्नयन स्थिरांक के लिए है। / \(K_b\) represents the boiling point elevation constant.
Step 3
Exam Tip
(f) को जमने से जोड़कर याद करें। / Link (f) with freezing.
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हिमांक अवनमन के लिए कौन सा संबंध सही है?
Which relation is correct for depression in freezing point?
#freezing point depression
#Kf
#molality
A \( \Delta T_f = K_f m \)
B \( \Delta T_b = K_f m \)
C \( \pi = K_b m \)
D \( pV = K_f \)
Explanation opens after your attempt
Correct Answer
A. \( \Delta T_f = K_f m \)
Step 1
Concept
हिमांक अवनमन मोललता के समानुपाती होता है। / Depression in freezing point is proportional to molality.
Step 2
Why this answer is correct
इसका सरल संबंध \( \Delta T_f = K_f m \) है। / The simple relation is \( \Delta T_f = K_f m \).
Step 3
Exam Tip
( f ) को हिमांक से और ( b ) को क्वथनांक से जोड़कर याद रखें। / Remember (f) for freezing and (b) for boiling.
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यदि \(\Delta T_f = 3.6\) और \(K_f = 1.8\) हो, तो मोललता कितनी होगी?
If \(\Delta T_f = 3.6\) and \(K_f = 1.8\), what is the molality?
#molality calculation
#freezing point depression
#Kf
A \(2\)
B \(1\)
C \(5.4\)
D \(0.5\)
Explanation opens after your attempt
Step 1
Concept
\(\Delta T_f = K_f m\) से \(m = \frac{\Delta T_f}{K_f}\)। / From \(\Delta T_f = K_f m\), \(m = \frac{\Delta T_f}{K_f}\).
Step 2
Why this answer is correct
\(\frac{3.6}{1.8} = 2\)। / \(\frac{3.6}{1.8} = 2\).
Step 3
Exam Tip
भाग करते समय ताप परिवर्तन और स्थिरांक के मात्रक संतुलित रखें। / Keep units consistent while dividing.
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यदि \(K_f = 1.8\) और (m = 1) हो, तो \(\Delta T_f\) कितना होगा?
If \(K_f = 1.8\) and (m = 1), what is \(\Delta T_f\)?
#delta Tf calculation
#Kf
#molality
A \(1.8\)
B \(0.8\)
C \(2.8\)
D \(18\)
Explanation opens after your attempt
Correct Answer
A. \(1.8\)
Step 1
Concept
हिमांक में कमी के लिए \(\Delta T_f = K_f m\) प्रयोग करें। / Use \(\Delta T_f = K_f m\).
Step 2
Why this answer is correct
\(1.8 \times 1 = 1.8\)। / \(1.8 \times 1 = 1.8\).
Step 3
Exam Tip
मोललता एक हो तो ताप परिवर्तन स्थिरांक के बराबर होता है। / When molality is one, the temperature change equals the constant.
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यदि \(K_f\) और मोललता ज्ञात हों, तो क्या निकाला जा सकता है?
If \(K_f\) and molality are known, what can be calculated?
#Kf
#molality
#freezing point depression
A हिमांक में कमी / Depression in freezing point
B क्वथनांक में वृद्धि / Elevation in boiling point
C मोल अंश हमेशा / Mole fraction always
D दाब का रंग / Colour of pressure
Explanation opens after your attempt
Correct Answer
A. हिमांक में कमी / Depression in freezing point
Step 1
Concept
\(K_f\) हिमांक में कमी का स्थिरांक है। / \(K_f\) is the constant for freezing point depression.
Step 2
Why this answer is correct
\(\Delta T_f = K_f m\) से ताप में कमी निकाली जाती है। / Use \(\Delta T_f = K_f m\).
Step 3
Exam Tip
परीक्षा में \(K_f\) को \(K_b\) से न मिलाएं। / Do not confuse \(K_f\) with \(K_b\) in exams.
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किस स्थिरांक को हिमांक स्थिरांक कहा जाता है?
Which constant is called the cryoscopic constant?
#Kf
#cryoscopic constant
#freezing point depression
A \(K_f\)
B \(K_b\)
C \(R\)
D \(C\)
Explanation opens after your attempt
Correct Answer
A. \(K_f\)
Step 1
Concept
हिमांक में कमी से जुड़ा स्थिरांक \(K_f\) है। / \(K_f\) is related to depression in freezing point.
Step 2
Why this answer is correct
इसे हिमांक स्थिरांक या मोलल अवनमन स्थिरांक भी कहा जाता है। / It is called the cryoscopic constant.
Step 3
Exam Tip
सूत्र \(\Delta T_f = K_f m\) को सीधे याद रखें। / Remember it through \(\Delta T_f = K_f m\).
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