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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Filed Under: General Science
Exam Prep: AIEEE , GATE
Job Role: Analyst , Bank PO

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:

Minute hand overlaps hour hand in 65 mins. In how many days it will gain 1440 hours ?

A) 57 days	B) 58 days
C) 60 days	D) 61 days

Answer & Explanation Answer: C) 60 days

Explanation:

In this problem , it has considered that 65 mins = 1hr
So mins has increased by 5 mins so multiply 5 x 24 = 120 mins extra ,
That is now per day it adds 2hr extra, so divide 1440/26 = 59.384 days =~ 60 days.

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Filed Under: Clock puzzles
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38 7984

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:

What is the capital of china?

A) Santiago	B) Beijing
C) Havana	D) None

Answer & Explanation Answer: B) Beijing

Explanation:

capital of china is Beiging

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Filed Under: Country Capitals

64 7975

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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Filed Under: General Awareness
Exam Prep: Bank Exams
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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

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