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 7273

Q:

It is necessary to sort a file before searching a particular item

A) True	B) False
C) May or may not be true	D) None of the above

Answer & Explanation Answer: C) May or may not be true

Explanation:

If less work is involved in searching a element than to sort and then extract, then we don’t go for sort

If frequent use of the file is required for the purpose of retrieving specific element, it is more efficient to sort the file.

Thus it depends on situation

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Filed Under: Database
Job Role: Database Administration

2 7272

Q:

Which of the statements given below are not correct?

1. The author of the novel 'A Visit from the Goon Squad' is Edward P Jones.
2. The author of the novel 'The Corrections' is Jonathan Franzen.
3. The author of the novel 'The Known World' is Jennifer Egan.

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

Answer & Explanation Answer: C) 1 and 3

Explanation:

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Filed Under: Books and Authors
Exam Prep: Bank Exams

1 7272

Q:

Complete the following sentence with the most appropriate option.

A disease always has __.

A) a cause	B) germs
C) a doctor	D) a cure

Answer & Explanation Answer: A) a cause

Explanation:

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Filed Under: English
Exam Prep: AIEEE , GRE , TOEFL

0 7271

Q:

Rearrange the parts of the sentence in correct order.

The debate

P : on allowing euthanasia to

Q : protect the dignity of patients in a

R : vegetative state has become a key question

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

Answer & Explanation Answer: D) PQR

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 7265

Q:

Which of the statements given below are correct?

1. The author of the novel 'Dodgers' is Don Winslow.
2. The author of the novel 'Forty Thieves' is Bill Beverly.
3. The author of the novel 'The Corrections' is Thomas Perry.

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

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

Explanation:

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Filed Under: Books and Authors
Exam Prep: Bank Exams

0 7260

Q:

In which of the following mammals estrous cycle is absent ?

A) Rabbit	B) Horse
C) Cow	D) Monkey

Answer & Explanation Answer: D) Monkey

Explanation:

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams

19 7259

Q:

Cutaneous respiration occurs in

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

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