Q:

Which statement best describes an $O_{3}$ molecule?

A) The double bond in ozone switches back and forth between the two outer oxygen atoms	B) An ozone molecule contains one single bond and one double bond
C) Each atom in ozone is connected to another atom by 1.5 bonds.	D) None

Answer & Explanation Answer: B) An ozone molecule contains one single bond and one double bond

Explanation:

Ozone molecule has one single bond and one double bond.

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8 7989

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 7987

Q:

In which year was the partition of Bengal Scrapped?

A) 1908	B) 1911
C) 1923	D) 1931

Answer & Explanation Answer: B) 1911

Explanation:

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Filed Under: Indian History

8 7984

Q:

The European Union has adopted which of the following as common currency?

A) Dollar	B) Dinar
C) Yen	D) Euro

Answer & Explanation Answer: D) Euro

Explanation:

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19 7975

Q:

Hindustan Aeronautics Limited (HAL) has handed over a Dornier 228 light-weight aircraft to DRDO. What is the name of this aircraft?

A) Vayurathna	B) Maharathna
C) Nabhrathna	D) Aakashrathna

Answer & Explanation Answer: C) Nabhrathna

Explanation:

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Filed Under: General Awareness

9 7967

Q:

Shedding of leaves and fruits is due to the presence of hormone named

A) Indole - acetic acid	B) Naphthalene acetic acid
C) Gibberellins	D) Abscisic acid

Answer & Explanation Answer: D) Abscisic acid

Explanation:

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Filed Under: Biology

35 7959

Q:

How Many Prime ministers have conferred with Bharat Ratna upto November 2014 ?

Answer

Six

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93 7955

Q:

Who was the only Secretary General of the UNO to have died while in office ?

A) Dag Hammarskjold	B) Trygve Lie
C) Kurt Waldhiem	D) U Thant

Answer & Explanation Answer: A) Dag Hammarskjold

Explanation:

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