Free Practice Questions for Competitive Exams, Interviews, Certifications

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 = $1 - α + x α + y α$ = $1 - α (x + y - 1)$

$i = \frac{1 + α (x + y - 1)}{1}$

$\Rightarrow α = \frac{i - 1}{x + y - 1}$

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE

6 6887

Q:

The book “The Other One Percent: Indians in America” has been authored by whom?

A) Lionel Messi	B) Balaji Vittal
C) Sanjoy Chakravorty	D) Joe Harris

Answer & Explanation Answer: C) Sanjoy Chakravorty

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: General Awareness
Exam Prep: CAT
Job Role: Bank PO

6 3218

Q:

The ratio of Karthik’s and Kalyan’s ages is 4: 5. If the difference between the present age of Kalyan and the age of Karthik 5 years hence is 3 years, then what is the total of present ages of Karthik and Kalyan?

A) 56 years	B) 62 years
C) 69 years	D) 72 years

Answer & Explanation Answer: D) 72 years

Explanation:

Let us consider Karthik as K1 and Kalyan as K2.

Given $\frac{k 1}{8 + k 1}$ and K2 - (K1 + 5) = 3

K2 - K1 = 8

K2 = 8 + K1

Now,

$\frac{k 1}{8 + k 1} = \frac{4}{5}$

=> K1 = 32 years

Therefore K2 = 40 years.

K1 + K2 = 72 years.

Report Error

View Answer Report Error Discuss

Filed Under: Problems on Ages
Exam Prep: CAT
Job Role: Bank PO

6 6787

Q:

Bhel commissions another 600Mw thermal unit in which state ?

A) Telangana	B) Andhra Pradesh
C) Chattisgarh	D) Karnataka

Answer & Explanation Answer: A) Telangana

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: General Awareness
Exam Prep: CAT , GATE , GRE
Job Role: Bank Clerk , Bank PO , IT Trainer , Network Engineer

6 3897

Q:

Name the movie that voted 2016’s Best Film by Indian film critics’ poll?

A) Pink	B) Sultan
C) Mohenjadaro	D) Dangal

Answer & Explanation Answer: D) Dangal

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Honours and Awards
Exam Prep: CAT , GATE
Job Role: Bank Clerk , Bank PO

6 2845

Q:

Raghu can complete a work in 12days working 9 hours a day. Arun can complete the same work in 8 days working 11 hours a day. If both Raghu and Arun work together, working 12 hours a day, in how many days can they complete the work ?

A) $3 \frac{4}{49} d a y s$

B) $12 \frac{4}{49} d a y s$

C) $4 \frac{3}{49} d a y s$

D) $4 \frac{12}{49} d a y s$

A) Option A	B) Option B
C) Option C	D) Option D

Answer & Explanation Answer: C) Option C

Explanation:

Raghu can complete the work in (12 x 9)hrs = 108 hrs.

Arun can complete the work in (8 x 11)hrs = 88 hrs.

Raghu's 1 hrs work = 1/108 and Arun's 1 hrs work = 1/88

(Raghu + Arun)'s 1 hrs work = $(\frac{1}{108} + \frac{1}{88}) = \frac{49}{2376}$

So, both Raghu and Arun will finish the work in $\frac{2376}{49} h r s$

Number of days of 12 hours each= $(\frac{2376}{49} \times \frac{1}{12})$ = $\frac{198}{49} = 4 \frac{3}{49} d a y s$

Report Error

View Answer Report Error Discuss

Filed Under: Time and Work
Exam Prep: GATE , CAT , Bank Exams
Job Role: Bank PO , Bank Clerk

6 6834

Q:

Ammeter : Current :: Odometer : ?

A) Blood Pressure	B) Haemoglobin
C) pressure	D) Speed

Answer & Explanation Answer: D) Speed

Explanation:

Here Ammeter is used for measuring Current whereas Odometer is used to measure Speed.

Report Error

View Answer Report Error Discuss

Filed Under: Analogy
Exam Prep: Bank Exams , CAT , GATE , GRE
Job Role: Bank Clerk , Bank PO

6 5242

Q:

Who was sworn in as the 44th Chief Justice of India (CJI) recently ?

A) Justice Tirath Singh Thakur	B) Justice Atul Mehta
C) Justice Jagdish Singh Khehar	D) Justice T M Goyal

Answer & Explanation Answer: C) Justice Jagdish Singh Khehar

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Famous Personalities
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

6 3006

Aptitude and Reasoning

General Knowledge

Puzzles

Interview Questions

Technical Questions

Certification Questions

Quick Links