GATE Questions

Q:

Which of these molecules are polar? Check all that apply.

A) SO2 B) CH2Cl2
C) PCl3 D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

   1) SO2                  2) CH2Cl2                3) PCl3

polar1525846214.jpg image

How to check the given molecules are polar or non polar :

If the electronegativity of the two bonded atoms are different then the bond is polar. Although, some molecules contain polar bonds, the molecule may be non-polar. If the polarity of all the bonds present in the molecule are cancel each other then molecule is non-polar.

 

In the given options,

SO2  is polar because the dipole moments on the O do not cancel.

PCl3  is polar because the P-Cl bonds do not cancel out.

CH2Cl2  polar because the C-Cl bonds do not cancel.

 

Hence, in brief, Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge.

For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound.

 

Therefore, all the given options SO2, CH2Cl2 and PCl3 are Polar molecules.

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5 9290
Q:

Orlon is a polymer of

A) Dacron B) Acrylonitrile
C) Polyamide Nylon D) None of the above
 
Answer & Explanation Answer: B) Acrylonitrile

Explanation:

The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN). 

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19 9285
Q:

Rearrange the following sentences (A), (B), (C), (D), (E) and (F) in the proper sequence to form a meaningful paragraph.

(A) It causes a lot of physical problems especially for our eyes, body and mind.
(B) Such a lifestyle makes man lazy and excessively dependent on machines.
(C) Innovative products such as computers, laptops, mobile phones,
(D) Harmful radiation causes various terminal diseases.
(E) Technology has advanced rapidly and man cannot seem to live without it now.
(F) iPads have made things easier for us, but it also has its disadvantages.

Which of the following options is the correct arrangement ?

 

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

Explanation:
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25 9280
Q:

HCF of 1, 2, 3?

A) 3 B) 2
C) 1 D) 0
 
Answer & Explanation Answer: C) 1

Explanation:

Given numbers are 1, 2 and 3

Factors of 1 = 1

Factors of 2 = 1, 2

Factors of 3 = 1, 2 and 3

Common factors = 1

 

Hence, the HCF of 1, 2 and 3 = 1.

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Filed Under: HCF and LCM
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31 9275
Q:

India is the largest producer of

A) Cotton B) Milk
C) Mangoes D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

As per the latest updates, India is :

 

  • Largest producer of milk.
  • Largest producer of millets in the world.
  • Largest producer of jute.
  • Largest producer of ginger.
  • Largest producer of bananas.
  • Largest producer of castor oil seeds.
  • Largest producer of mangoes.
  • Largest producer of safflower oil seeds.
  • Largest producer of papayas.
  • Largest producer of cottonseed (As per International Cotton Advisory Committee (ICAC) report for the month of March 2017)

 

  • Second largest producer of tea, the first position being held by China.
  • Second largest producer of sugarcane, the first position being held by Brazil.
  • Second largest producer of wheat, the first position being held by China.
  • Second largest producer of onions, the first position being held by China.
  • Second largest producer of potatoes, the first position being held by China.
  • Second largest producer of garlic, the first position being held by China.
  • Second largest producer of rice, the first position being held by China.
  • Second largest producer of cement., next to China.
  • Second largest producer of silk, the first position being held by China.
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Filed Under: General Awareness
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6 9273
Q:

A drawing on transparent paper is

A) Blue print B) Negative
C) Transparency D) Red print
 
Answer & Explanation Answer: C) Transparency

Explanation:

The one word substitute for 'a drawing on transparent paper' is Transparency.

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6 9269
Q:

Prophet of New India is

A) Dayanand Saraswathi B) Sri Ramakrishna
C) Swamy Vivekananda D) Raja Ram Mohan Roy
 
Answer & Explanation Answer: B) Sri Ramakrishna

Explanation:

Sri Ramakrishna is called as the Prophet of New India.

Sri Ramakrishna (1836-86) mostly known as Ramakrishna Paramhamsa was a spiritual genius now respected in India and abroad as an outstanding saint of our times. His life and thoughts represents the highest and best of modern Hindu philosophy and practice.

Reverence and admiration for him amongst Bengali elites led to the formation of the Ramakrishna Mission by his chief disciple Swami Vivekananda. His devotees look upon him as an incarnation or Avatara of the formless Supreme Brahman as described in the Vedanta while some devotees see him as an avatara of Vishnu.

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20 9253
Q:

If 6 men and 3 boys working together, can do four times as much work per hour as a man and a boy together. Find the ratio of the work done by a man and that of a boy for a given time  ?

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

Explanation:

6M + 3B = 4(1M + 1B)
6M + 3B = 4M + 4B
2M = 1B

M/B = 1/2

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Filed Under: Ratios and Proportions
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18 9249