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Q:

The activation energy for the reverse reaction is represented by

 

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

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Filed Under: Chemistry
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Q:

Who of the following kings was ardent follower of Jainism

A) Bimbisara B) Mahapadmananda
C) Kharavela D) Pulkeshin II
 
Answer & Explanation Answer: C) Kharavela

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Filed Under: Indian History

26 15529
Q:

Helicopter was invented by

A) Drinker B) Broquet
C) Copernicus D) Cockrell
 
Answer & Explanation Answer: B) Broquet

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Filed Under: Inventions

66 15517
Q:

Name the bird that migrates from the north pole to the south pole and back?

A) Arctic tern B) Swallow
C) Crane D) Penguin
 
Answer & Explanation Answer: A) Arctic tern

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Filed Under: Animals and Birds

184 15514
Q:

The outer membrane that covers the brain is

A) Myelin sheath B) Dura mater
C) Arachnoid membrane D) Pia mater
 
Answer & Explanation Answer: B) Dura mater

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Filed Under: Biology

119 15512
Q:

Rearrange the parts of the sentence in correct order.

There needs to be a

P : more coordinated effort

Q : forest diseases in India

R : towards dealing with

 

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

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Filed Under: English
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Q:

Which  of  the  following  substances  cause temporary hardness in water?

1. Mg(HCO3)2

2. Ca(HCO3)2

3. CaCl2

4. MgSO4

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

Explanation:

There are two types of water hardness: temporary and permanent hardness. Temporary hardness is due to the presence of calcium hydrogen carbonate Ca(HCO3)2(aq) and magnesium hydrogen carbonate Mg(HCO3)2(aq).

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Filed Under: Chemistry
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Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba
 
Answer & Explanation Answer: B) N, P Au

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Filed Under: Chemistry
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