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:

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 7261

Q:

Which of the following regions receives rainfall throughout the year?

A) Tundra	B) Monsoon
C) Mediterranean	D) Equatorial

Answer & Explanation Answer: D) Equatorial

Explanation:

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Filed Under: World Geography
Exam Prep: Bank Exams

1 7261

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 7255

Q:

State game of Madhya Pradesh?

A) Mallakhamba	B) Lagori
C) Kabaddi	D) Kho Kho

Answer & Explanation Answer: A) Mallakhamba

Explanation:

State_game_of_Madhya_Pradesh1552129369.jpg image

The State game of Madhya Pradesh is Mallakhamba.

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Filed Under: Indian Geography
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

11 7253

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 7240

Q:

Select the related word/letters/numbers from the given alternatives:

Owl : Hoots :: Hen : ?

A) Chirps	B) Clucks
C) Coos	D) Cackles

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