GATE Questions

Q:

Which equation is an example of a synthesis reaction?

A) 2H2 + O2 → 2H2O B) Na + Cl → NaCl
C) HA + BOH → H2O + BA D) NaCl + AgNO3 → NaNO3 + AgCl
 
Answer & Explanation Answer: B) Na + Cl → NaCl

Explanation:

When two or more chemical species combine to form a single product, the reaction is said to be synthesis reaction. It is also called as Direct Combination reaction.

 

Here in the given options, Sodium (Na) combines with Chlorine (Cl) to form a more complex single product Sodium Chloride (NaCl).

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Q:

What travels around the world but stays in one spot?

Answer

Therefore the answer for What travels around the world but stays in one spot is STAMP or any other thing that acts as a stamp does.


Ex. the letter in the envelope etc...


 


Since, Several things have the possibility, but the word travel evokes that it would move. 

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Q:

When a barometer is rising air pressure is

A) increasing B) decreasing
C) constant D) zero
 
Answer & Explanation Answer: A) increasing

Explanation:

The device which is used to measure air pressure is called as barometer. If the barometer reading is rising, it indicates that the air pressure is increasing and if the reading is falling the air pressure is decreaing.

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Filed Under: Physics
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Q:

What does it mean to calculate frequencies within a dataset? 

A) to calculate the product of two variables to make a third variable B) to count the number of cases that fall into different subgroups within a dataset
C) to count the number of times a dataset is used by a student D) to calculate the sum of a column of variables in a dataset
 
Answer & Explanation Answer: B) to count the number of cases that fall into different subgroups within a dataset

Explanation:

Frequency is what means how many times the event occurs in the same period.

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Filed Under: Arithmetical Reasoning
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Q:

Magnetism in materials is due to

A) Displacement of electrons B) Circular motion of electrons
C) Charges of neutrons D) All of the above
 
Answer & Explanation Answer: B) Circular motion of electrons

Explanation:

Magnetism in materials is due to circular motion of electrons.

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Q:

The complexity of linear search algorithm is

A) O(n2) B) O(n log n)
C) O(n) D) O(log n)
 
Answer & Explanation Answer: C) O(n)

Explanation:

The worst case complexity of linear search is O(n).

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Q:

Cabinet members report to the

A) President B) Prime Minister
C) Vice President D) All of the above
 
Answer & Explanation Answer: A) President

Explanation:
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Filed Under: Indian Politics
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Q:

Who is the first richest person in India?

A) Mukesh Ambani B) Azim Premji
C) Dilip Shangvi D) Lakshmi Mittal
 
Answer & Explanation Answer: A) Mukesh Ambani

Explanation:

According to 2018 January reports, Mukesh Ambani is the first richest person in India being 18th in the world, followed by Azim Premji and S.P. Hinduja in second and third places.

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Filed Under: General Awareness
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