Questions

Q:

A voltaic cell converts chemical energy to

A) Heat energy B) Electrical energy
C) Mechanical energy D) Light energy
 
Answer & Explanation Answer: B) Electrical energy

Explanation:

A galvanic cell is also known as voltaic cell provides electrical energy from the chemical energy.

 

a_voltaic_cell_converts_chemical_energy_to1558088421.png image

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Q:

The greenhouse effect is caused by

A) Deforestation B) Burning of Fossil Fuels
C) Increase in Population D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The major greenhouse gases (GHG’s) solely responsible for greenhouse effect are Carbon dioxide, Ozone, Methane and Water vapor. Although these gases comprise 1% of our atmosphere, they act like a thick warm blanket outside that surrounds this planet and regulate climate control. Greenhouse effect is not bad. In fact, it is needed for all of us to survive on planet Earth. In short, the greenhouse effect is nothing but a naturally occurring process designed by nature that aids in heating earth’s surface and helps to maintain ecological balance.

Now, while some of that heat dissipates into space, some of it burns along the atmosphere, and some of it penetrates the atmosphere and finds its way into the lower atmosphere and the planet’s surface. This in turn raises the average temperature of the Earth. Therefore, the increase in the Earth’s surface temperature due to increase in the number of greenhouse gases leads to global warming.

 

Causes of Green House Effects ::

 

* Burning of Fossil Fuels

* Deforestation 

* Increase in Population

* Farming

* Industrial Waste and Landfills.

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Q:

What are the followers of Judaism called?

A) Jews B) Judais
C) Sakhs D) Sikhs
 
Answer & Explanation Answer: A) Jews

Explanation:

Judaism is the world's oldest monotheistic religion with the belief in one God. The followers of Judaism are called Jews.

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Q:

Which is Largest railway route in India ?

Answer



Dibrugarh in Assam to Kannyakumari in Tamil Nadu.


 

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Q:

Which of the following events of World History marked the beginning of the Second World War?

A) Invasion of Poland by German armies B) Occupation of Latvia , Estonia and Lithuania by the soviet Union
C) War against Finland declared by the USSR D) The period of 'Phoney war"
 
Answer & Explanation Answer: A) Invasion of Poland by German armies

Explanation:

On 1 september 1939 German armies marched into poland. On 3 September Britain and France declared war on Germany.Thus the invasion of poland marked the beginning of the Second World War. The German armies completed the conquest of poland in less than three weeks as no aid reached poland. In spite of the declaration of war, however, there was little actual fighting for many months. Therefore, the war during the period from  september 1939 to April 1940 when germany invaded Narway and Denmark is known as the "Phoney War"

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Q:

What is the purpose of balancing chemical equations?

A) law of conservation of energy B) law of conservation of mass
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) law of conservation of mass

Explanation:

The main purpose of balancing chemical equations is to make the mass of reactants is equal to mass of products obtained after the reaction. Hence, to make law of conservation of mass is purpose of balancing chemica equations.

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Q:

Which of the following is an Autoimmune disease?

A) Systematic lupus erythematosus B) Acute anaphylaxis
C) Farmer's lung D) A heart attack
 
Answer & Explanation Answer: A) Systematic lupus erythematosus

Explanation:

An autoimmune disease is a condition in which your immune system mistakenly attacks your body.

 

The immune system normally guards against germs like bacteria and viruses. When it senses these foreign invaders, it sends out an army of fighter cells to attack them. Normally, the immune system can tell the difference between foreign cells and your own cells.

 

In an autoimmune disease, the immune system mistakes part of your body — like your joints or skin — as foreign. It releases proteins called autoantibodies that attack healthy cells. Some autoimmune diseases target only one organ. Type 1 diabetes damages the pancreas. Other diseases, like lupus, affect the whole body.

 

Hence, Systematic lupus erythematosus is an autoimmune disease that affects multiple organs.

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Q:

City with most Bridges in the world is _________

Answer

Hamburg, Germany, is located on the river Elbe at the point where it meets the Bille and Alster rivers. The canals, rivers and streams within the city are crossed by a total of 2,302 bridges-more than the cities of Vanice and Amsterdam combined.

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