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Q:

The mass number of an isotope of an element is 298. If its nucleus has 189 neutrons, what is its atomic number?

A) 298 B) 189
C) 109 D) 487
 
Answer & Explanation Answer: C) 109

Explanation:
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Filed Under: Chemistry
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Q:

Which becomes the first country to Recognise 'Orphanage Trafficking' as Slavery?

A) Mexico B) Australia
C) Afghanistan D) India
 
Answer & Explanation Answer: B) Australia

Explanation:

the first country to Recognise 'Orphanage Trafficking' as Slavery is Australia.

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Filed Under: General Awareness
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Q:

Wind and solar energy are examples of

A) renewable B) non renewable
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) renewable

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Filed Under: General Science
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Q:

If M is the sister of Z , Z is the wife of P and P is the son of A, how Z relates to A?

A) Daughter-in-law B) Daughter
C) Wife D) Mother
 
Answer & Explanation Answer: A) Daughter-in-law

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Filed Under: Blood Relations
Exam Prep: Bank Exams

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Q:

A trader sells two items at the rate of Rs 400 each. If he gains 15% on one and losses 15% on other, then what is the value (in Rs) of loss ?

A) 18.41 B) 22.14
C) 20.25 D) 24.36
 
Answer & Explanation Answer: A) 18.41

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

The average of the ages of Rajan and his son is 20. If Rajan's present age is three times the age of his son, then what will be the age of Rajan 5 years from now?

A) 40 years B) 28 years
C) 35 years D) 25 years
 
Answer & Explanation Answer: C) 35 years

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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

Speed regulation of synchronous motor is

A) 1% B) 25%
C) Zero D) 0.5%
 
Answer & Explanation Answer: C) Zero

Explanation:

speed_regulation_of_synchronous_motor1553077296.jpg image

Synchronous motor is a motor which runs at a constant speed irrespective of load attached to it. So the speed regulation of synchronous motor is ZERO.

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Filed Under: Physics
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Q:

Which equation represents a neutralization reaction?

A) 2Al(OH)3(s) ---> Al2O3(s) + 3H2O(l) B) H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)
C) 2H2(g) + O2(g) ---> 2H2O(l) D) H2CO3(aq) ---> CO2(g) + H2O(l)
 
Answer & Explanation Answer: B) H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)

Explanation:

Here in the option B) H2SO4 - Sulfuric acid is reacting with sodium hydroxide (NaOH), a base to produce a salt (Sodium Sulfate), and water (H2O). This is characteristic of of acid-base neutralization reactions.

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Filed Under: Chemistry
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