Questions

Q:

Red Data Book contains

A) Rare minerals B) Vanishing rivers
C) Red pandas D) Rare plants & animals under threat
 
Answer & Explanation Answer: D) Rare plants & animals under threat

Explanation:

It is a public document used to keep information about rare plants, animals, fungi etc... that exist within the territory. It is a Russian Federation Book.

Red_data_book_contains1561550192.jpg image

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Q:

A king of the Roman Empire, in 37 B.C, became the most powerful and ruled for 44 years.Who was that king?

A) Octavian B) Julius Caesar
C) Lapidus D) Mark Antony
 
Answer & Explanation Answer: A) Octavian

Explanation:

In 37 BC, Octavian became the most powerful man in the Roman Empire for 44 years under the titles of Augustus, which meant 'holy' and imperator, meaning 'Victorious general'. He also called himself Princeps, 'first citizen of the state'. The period of Roman history beginning with his rule upto A.D 284 is called the principate. His rule and the period following it were  peaceful and  are known in history as 'Pax Romana' which means 'Roman Peace'

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Q:

How many Species go Extinct Every Day?

Answer

About 150 - 200 species of plant, insect, bird and mammal become extinct every day or 24 hrs.


This is not an accurate but an estimation by U.N. Convention on Biological Diversity and Global Extinction Rates. It is also said that current extinctions were 'up to 100 times higher than the background rate.'

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Q:

Heat transfer by conduction occurs when molecules

A) Collide B) Combine
C) Heated D) None of the above
 
Answer & Explanation Answer: A) Collide

Explanation:

Conduction is the movement of heat through a substance by the collision of molecules. It occurs when two object at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature.

Heat_transfer_by_conduction_occurs_when_molecules1560488148.jpg image

 

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Q:

A wire of copper having length I and area of cross-section A is taken and a current / is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

A) P B) < P
C) > P D) 2P
 
Answer & Explanation Answer: C) > P

Explanation:

Aluminum has a resistivity varying from 2.65 to 2.82 × 10−8 Ω m.The resistivity of copper is generally given as: 1.72 x 10-8 Ω.m.So, since resistivity of aluminium is higher than that of copper, so Power dissipated will be greater than P. this is because rest of the factors (l, A and i) are constant.

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Q:

How many Indian got a place in 100 most influential people in the world list 2017 by Time magazine ?

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

Explanation:

Prime Minister Narendra Modi and Paytm founder Vijay Shekhar Sharma.

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Q:

Claude Bernard first recognized

A) plant stomata opening and closing to maintain homeostasis B) chemical reactions of enzymes
C) separate fluids outside and inside the cell D) feedback loops
 
Answer & Explanation Answer: A) plant stomata opening and closing to maintain homeostasis

Explanation:

Claud_Bernard1533194164.jpg image

 

Claude Bernard was a French physiologist, who first recognised plant stomata opening and closing to maintain homeostasis.

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Q:

Which has the lowest freezing point?

A) Mercury B) Helium
C) Cesium D) Aluminium
 
Answer & Explanation Answer: B) Helium

Explanation:

Helium has the lowest freezing point of all the elements. When coming to metals, mercury has the lowest freezing point of all the metals.

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