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 8556

Q:

19 C in a CB

Answer

19 C in a CB means 19 Coins in a Carrom Board.

We have 9 white coins, 9 black coins and one red coin in a carrom board.

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19 8553

Q:

Peace, discipline, freedom and equality are all examples of

peace_discipline_freedom_and_equality_are_all_examples_of1538653767.jpg image

A) Democratic values	B) Resolutions
C) Myths	D) Settings

Answer & Explanation Answer: A) Democratic values

Explanation:

Peace, discipline, freedom and equality are all examples of human values or democratic values which all the people want to be in them for society.

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Filed Under: Indian Politics
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4 8547

Q:

Web based complaints redressal system 'SCORES' is launched by which of the following organizations/agencies?

A) IBA	B) SEBI
C) State Bank of India	D) Ministry of Corporate Affairs

Answer & Explanation Answer: B) SEBI

Explanation:

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Filed Under: General Awareness

22 8546

Q:

Who became the fastest bowler to get to 250 wickets in the test matches ?

A) K. Rabada	B) R. Ashwin
C) T G Southee	D) Jadeja

Answer & Explanation Answer: B) R. Ashwin

Explanation:

Indian Cricket team off-spin specialist Ravichandran Ashwin has become the fastest cricketer to take 250 wickets in the Test matches. Ashwin surpassed Australian fast bowler Dennis Keith Lillee to reach the milestone of 250 Test wicket. Thus Ravichandran Ashwin has become the sixth Indian bowler to reach 250 test wickets.

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Filed Under: Sports
Exam Prep: CAT , Bank Exams
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12 8541

Q:

Teachers day is celebrated in memory of

A) Dr. Rajendra Prasad	B) Sir Vallabhai Patel
C) Dr. Sarvepalli Radhakrishnan	D) Jawaharlal Nehru

Answer & Explanation Answer: C) Dr. Sarvepalli Radhakrishnan

Explanation:

Every year 5th September is celebrated as Teacher's Day in India, in the memory of Dr. Sarvepalli Radhakrishnan's birthday. He was the first vice-president and second president of India.

Teachers_day_is_celebrated_in_memory_of1536127626.jpg image

After he become the president of India, his students want to celebrate his birthday in grand but he refused and he adviced them to celebrate that day as teachers day. From then, 5th September is celebrated as Teacher's Day.

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2 8539

Q:

The lotus temple in Delhi is a house of worship of which of the following religions ?

A) Buddhism	B) Baha'i Religion
C) Zoroastrian	D) Islam

Answer & Explanation Answer: B) Baha'i Religion

Explanation:

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Filed Under: Indian History

34 8538

Q:

I am always infront of you, but you will never see me. Who am I?

A) Mirror	B) Shadow
C) Future	D) None of the above

Answer & Explanation Answer: C) Future

Explanation:

Yes, future is always infront of us, but no one can see it.

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Filed Under: Logic Puzzles
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3 8537

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