GATE Questions

Q:

Which statement about weak bonds is correct?

A) Covalent bonds are weak bonds B) They are hard to break
C) Weak bonds are transient and easily reversible. D) All of the above
 
Answer & Explanation Answer: C) Weak bonds are transient and easily reversible.

Explanation:

In chemistry, Weak bonds are those forces of attraction that, do not take a large amount of energy to break.

 

For example, hydrogen bonds are broken by energies in the order of 4 - 5 kcal/mol.

Ionic bonds, hydrogen bonds and van der Waals interactions are considered weak bonds.

 

Weak bonds are transient and easily reversible.

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Filed Under: Chemistry
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0 3420
Q:

A can complete a work in 12 days with a working of 8 hours per day. B can complete the same work in 8 days when working 10 hours a day. If A and B work together, working 8 hours a day, the work can be completed in --- days  ?

A) 51/24 B) 87/5
C) 57/12 D) 60/11
 
Answer & Explanation Answer: D) 60/11

Explanation:

A can complete the work in 12 days working 8 hours a day

=> Number of hours A can complete the work = 12×8 = 96 hours 

=> Work done by A in 1 hour = 1/96

 

B can complete the work in 8 days working 10 hours a day

=> Number of hours B can complete the work = 8×10 = 80 hours 

=> Work done by B in 1 hour = 1/80

 

Work done by A and B in 1 hour = 1/96 + 1/80 = 11/480

 => A and B can complete the work in 480/11 hours

 

A and B works 8 hours a day.

Hence total days to complete the work with A and B working together 

= (480/11)/ (8) = 60/11 days

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Filed Under: Time and Work
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4 3420
Q:

A is sister of B who is mother of C who is mother of D. E is the grand mother of D. Then how C is related to E ?

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

Explanation:

        GM    GM
A ---- B ---- E
         |
         |
         C
         |
         |
         D (Grand son or daughter)

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Filed Under: Blood Relations
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9 3417
Q:

The average age of husband, wife and their child 3 years ago was 24 years and that of wife and child 5 years ago was 25 years. The present age of the husband is:

A) 21 yrs B) 27 yrs
C) 29 yrs D) 31 yrs
 
Answer & Explanation Answer: A) 21 yrs

Explanation:

Sum of ages of husband, wife and child= (24 × 3) + 9 = 81 years

Sum of ages of wife and child => 25 × 2 + 10 = 50 + 10 = 60 years

Age of husband = 81 - 60 = 21 years.

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Filed Under: Problems on Ages
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5 3417
Q:

Guess the word?

5_letter1528105565.jpg image

Answer

SHORT is the required five letter word, which becomes SHORTER when two letters 'ER' are added to it.

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6 3414
Q:

A man sell 35 waffers for Rs. 15 each and loses Rs. 40.4. If he sells 35 waffers for Rs. 18, how much does he loss or gain ?

A) Rs. 64 B) Rs. 52
C) Rs. 72 D) Rs. 55
 
Answer & Explanation Answer: A) Rs. 64

Explanation:

Given Loss = Rs. 40.4
We know loss = cost price - selling price
40.4 = CP - 35(15)
=> CP = 40.4 + 525
=> CP = Rs. 565.4
Now the New selling price of waffer is Rs. 18
=> SP = 35(18) = 630
Now Gain = SP - CP = 630 -565.4 = Rs. 64.6.

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Filed Under: Profit and Loss
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5 3410
Q:

Find the correct sentence from the following options ?

A) The dacoits having stopped to divide the booty, the police had overtaken them B) The dacoits being stopped to divide the booty, the police overtook them.
C) The dacoits having been stopped for dividing the booty, the police overtook them D) The dacoits having stopped for dividing the booty, the police overtook them
 
Answer & Explanation Answer: D) The dacoits having stopped for dividing the booty, the police overtook them

Explanation:

As it is the past continuous sentence.

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Filed Under: Analogy
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3 3409
Q:

Which is called 'OFF State' in binary?

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

Explanation:

'0' is called OFF State in Binary...

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Filed Under: Arithmetical Reasoning
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8 3408