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Q:

Consider the following chemical reaction :

aFe2O3(s) + bCO(g) + cFe(s) + dCO2

In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?

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

Explanation:

Fe2O3 + 3CO = 2Fe + 3CO2

Hematite + Carbon Monoxide = Iron + Carbon Dioxide

In this reaction, the iron oxide is reduced to iron, and the carbon is oxidised to carbon dioxide.

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Filed Under: Chemistry
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0 86762
Q:

Rearrange the parts of the sentence in correct order.

The economic

P : a country leads to exponential

Q : growth of that country

R : empowerment of women of

 

A) PRQ B) PQR
C) RPQ D) RQP
 
Answer & Explanation Answer: C) RPQ

Explanation:
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Filed Under: English
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Q:

Improve the bracketed part of the sentence.

 

By 2030 India (would) have become the most populous country in the world.

A) will B) should
C) shall D) no improvement
 
Answer & Explanation Answer: A) will

Explanation:
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Q:

Find the G.C.F. & L.C.M. of 20 and 28.

 

A) 20,280 B) 5,280
C) 10,140 D) 4,140
 
Answer & Explanation Answer: B) 5,280

Explanation:
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Filed Under: Inventions
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177 86339
Q:

Astrosat is India's first

 

A) Reconnaissance satellite B) Remote sensing satellite
C) space observatory D) Communication satellite
 
Answer & Explanation Answer: A) Reconnaissance satellite

Explanation:
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Filed Under: Inventions
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Q:

Improve the bracketed part of the sentence.

When I last saw Ravi, he (had been running) to catch his bus.

A) ran B) was running
C) had run D) no improvement
 
Answer & Explanation Answer: B) was running

Explanation:
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Q:

Which among the following noble gas has highest molar mass?

 

A) Kr   B)  Ne  
C)  Ar   D)  Xe
 
Answer & Explanation Answer: D)  Xe

Explanation:
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Filed Under: Chemistry
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1 85823
Q:

The expressway is defined as a

 

A) limited-access or controlled-access highway. B) road designed for express transport.
C) high-speed privately owned highway. D) form of improved rural highway.
 
Answer & Explanation Answer: A) limited-access or controlled-access highway.

Explanation:
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Filed Under: General Awareness
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