Q:

The degree of dissociation ( $α$ ) of a weak electrolyte, $A_{x} B_{y}$ is related to van't Hoff factor (i) by the expression:

$1 . α = \frac{x + y + 1}{i - 1}$

$2 . α = \frac{x + y - 1}{i - 1}$

$3 . α = \frac{i - 1}{x + y + 1}$

$4 . α = \frac{i - 1}{x + y - 1}$

A) 1 is correct	B) 2 is correct
C) 3 is correct	D) 4 is correct

Answer & Explanation Answer: D) 4 is correct

Explanation:

Van't Hoff factor (i) = $\frac{O b s e r v e d C o l l i g a t i v e P r o p e r t y}{N o r m a l C o l l i g a t i v e P r o p e r t y}$

$\begin{matrix} A_{x} B_{y} \\ 1 - α \end{matrix} \to \begin{matrix} x A^{+ y} \\ x α \end{matrix} + \begin{matrix} y B^{- x} \\ y α \end{matrix}$

Total Moles = $1 - α + x α + y α$ = $1 - α (x + y - 1)$

$i = \frac{1 + α (x + y - 1)}{1}$

$\Rightarrow α = \frac{i - 1}{x + y - 1}$

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Filed Under: Chemistry
Exam Prep: AIEEE

6 7211

Q:

Which of the following National Parks of India are declared as World Heritage by UNESCO?

1. Keoladeo National Park

2. Sundarbans National Park

3. Kaziranga National Park

4. Ranthambore National Park

Select the correct answer using the code given below.

A) 1 and 2 only	B) 1, 2 and 3 only
C) 3 and 4 only	D) 1, 2, 3 and 4

Answer & Explanation Answer: D) 1, 2, 3 and 4

Explanation:

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Filed Under: World Organisations
Exam Prep: Bank Exams

2 7211

Q:

Cutaneous respiration occurs in

A) Cockroach	B) Salamander
C) Crab	D) Parrot

Answer & Explanation Answer: B) Salamander

Explanation:

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Filed Under: Biology

45 7209

Q:

The English East India Company laid the foundation of Fort St.George at Madras during the regin of

A) Akbar	B) Aurangzeb
C) Jahangir	D) Shah Jahan

Answer & Explanation Answer: D) Shah Jahan

Explanation:

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Filed Under: Indian History

9 7208

Q:

The doctrine of three jewels- Right belief, Right conduct and Right Knowledge- is the crownings glory of

A) Buddhism	B) Christianity
C) Jainism	D) None of these

Answer & Explanation Answer: C) Jainism

Explanation:

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Filed Under: Indian History

11 7200

Q:

Which of the following places is associated with Jainism

A) Kapilvastu	B) Pava
C) Prayag	D) Shravasti

Answer & Explanation Answer: B) Pava

Explanation:

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Filed Under: Indian History

5 7194

Q:

Rearrange the parts of the sentence in correct order.

Even more astonishingly,

P-he cast as "beautiful"
Q-he went on to
R-describe the vote

A) RQP	B) RPQ
C) PRQ	D) QRP

Answer & Explanation Answer: D) QRP

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 7194

Q:

The sampling distribution of a statistic is

A) A normal curve, for which probabilities are obtained by standardizing.	B) A distribution of all possible summary statistics from a single random sample, from the same population.
C) A distribution of all parameters from the population that is to be randomly sampled.	D) The mechanism that determines whether the random sampling was effective.

Answer & Explanation Answer: A) A normal curve, for which probabilities are obtained by standardizing.

Explanation:

The sampling distribution of a statistic is the distribution of the statistic for all possible samples from the same population of a given size.

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Filed Under: Indian Economy
Exam Prep: Bank Exams

3 7185

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