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Q:

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :

A) 3:4 B) 5:4
C) 5:1 D) 3:2
 
Answer & Explanation Answer: D) 3:2

Explanation:

In series : E1 + E2 = K(50)

In parallel : E1 - E2 = K(10)

E1 + E2 / E1 - E2 = 5/1

=> E1/E2 = 3/2

The emf's are in the ratio of 3:2.

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Filed Under: Physics
Exam Prep: AIEEE

Q:

Which one of the following can be oxidised to the corresponding carbonyl compound:

A) 2-methyl-2-hydroxy propane B) 2-hydroxy propane
C) o-Nitrophenol D) Phenol
 
Answer & Explanation Answer: B) 2-hydroxy propane

Explanation:
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Filed Under: Chemistry
Exam Prep: AIEEE

Q:

Ethanol is converted into ethoxy ethane,

A) by heating excess of ethanol with conc. H2SO4 at 140°C B) by treating with conc. H2SO4 at room temperature
C) by treating with conc. H2SO4 at 273 K D) by heating Ethanol with excess of conc. H2SO4 at 443 K
 
Answer & Explanation Answer: A) by heating excess of ethanol with conc. H2SO4 at 140°C

Explanation:
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Filed Under: Chemistry
Exam Prep: AIEEE

Q:

What is the maximum velocity with which a body of mass 'm' must enter a vertical loop of radius 'R'so that it can complete the loop?

A) 0  B) gR   C)  2gR  D)  5gR

A) A B) B
C) C D) D
 
Answer & Explanation Answer: D) D

Explanation:

To complete the vertical loop, the minimum speed required at the lowest point  = 5gR.

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Filed Under: Physics
Exam Prep: AIEEE , GATE
Job Role: Analyst

Q:

Variable number of tandem repeats (VNTRs) in the DNA molecule are highly useful in

A) Recombinant DNA technology B) Monoclonal antibody production
C) Stemcell culture D) DNA fingerprinting
 
Answer & Explanation Answer: D) DNA fingerprinting

Explanation:
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Filed Under: Biology
Exam Prep: AIEEE

Q:

Which type of Stem modification is seen in banana ?

A) Rhizome B) Stem tuber
C) Corn D) Bulb
 
Answer & Explanation Answer: A) Rhizome

Explanation:
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Filed Under: Biology
Exam Prep: AIEEE

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

Q:

What was the name of India's first ever micro-drama festival that was held recently in New Delhi ?

A) Thanes Hare B) Taapsi
C) Thespis D) Ankulrama
 
Answer & Explanation Answer: C) Thespis

Explanation:

India's first ever micro-drama festival, named Thespis, was held recently in New Delhi. 

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Filed Under: General Awareness
Exam Prep: Bank Exams