Questions

Q:

What is the gram formula mass of K2CO3?

A) 147 B) 138
C) 129 D) 116
 
Answer & Explanation Answer: B) 138

Explanation:

The gram formula mass of a compound is nothing but the molar mass.

The molar mass of K2CO3 (Potassium Carbonate) is given by

Atomic weights of individual elements are

 

K (Potassium) = 39 g

C (Carbon) = 12 g

O (Oxygen) = 16 g

 

Hence, that of K2CO3 = 39(2) + 12 + 16(3)

= 78 + 12 + 48

= 138.

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Q:

In the structure of planet Earth ,below the mantle, the core is mainly made up of which one of the following

A) Aluminium B) Chrromium
C) Iron D) Silicon
 
Answer & Explanation Answer: C) Iron

Explanation:
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Q:

The smallest dog on earth is the

Answer

Chihuahua

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Q:

A container contains 165 litres of milk. Some quantity of milk is taken out and half of that quantity of milk, water is added in the container. Now ratio of milk to water in the container becomes 5:3. What is the quantity of water added in it?

A) 40 litre B) 45 litre
C) 60 litre D) 30 litre
 
Answer & Explanation Answer: B) 45 litre

Explanation:

Let amount of milk removed = 2x litre
So, amount of water added = x litre
Now → (165 − 2x)/x = 5/3
x = 45 lit

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Q:

Which of the following is an example of continous emission spectrum?

A) Spectrum of an oil frame B) Spectrum of a water
C) both D) none
 
Answer & Explanation Answer: A) Spectrum of an oil frame

Explanation:

Spectrum of an oil frame is an example for continuous emission spectrum

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Filed Under: Physics

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Q:

What is common between Aerobic and Anaerobic Respiration?

A) Krebs cycle B) Glycolysis
C) Electron transport chain D) All the above
 
Answer & Explanation Answer: B) Glycolysis

Explanation:

Glycolysis is common between Aerobic and Anaerobic Respiration.

 

Cellular respiration is the process by which glucose is broken down to form ATP molecules, which act as carriers of cellular energy. The first phase is called glycolysis and is common to both aerobic (respiration in the presence of oxygen) and anaerobic (respiration in the absence of oxygen) respiration.

 

During glycolysis, glucose is split to forms two pyruvate molecules and 2 molecules of ATP. This occurs in the cytoplasm of the cell.

 

If oxygen in present, the pyruvate molecules will be used in the Krebs cycle, to yield more ATP molecules. If oxygen is absent, the pyruvate is converted into lactic acid, or ethanol and carbon dioxide, in animals or plants, respectively. 

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Q:

Which international organization has declared 2017 as the “International Year of Sustainable Tourism for Development”?

A) Asian Development Bank (ADB) B) World Trade Organisation (WTO)
C) United Nations (UN) D) International Monetary Fund (IMF)
 
Answer & Explanation Answer: C) United Nations (UN)

Explanation:

The United Nations (UN) has declared 2017 as the "International Year of Sustainable Tourism for Development" to celebrate and advance the commitment of the tourism division to building a superior world.The International Year aims to support a change in policies, business practices and consumer behavior towards a more sustainable tourism sector that can contribute effectively to the Sustainable Development Goals (SDGs).

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Q:

Enzymes are produced by

A) endocrine glands B) exocrine glands
C) liver D) spleen
 
Answer & Explanation Answer: B) exocrine glands

Explanation:

Glands are of two types. The exocrine glands have ducts to carry their secretions and these secretions contain enzymes. on the other hand, endocrine glands are ductless glands and they secrete mainly horomones.

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Filed Under: Biology

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