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Q:

Burning Magnesium ribbon produces white ash, which dissolves in water to form____.

 

A) Magnesium Halides B) Magnesium Oxide
C) Magnesium Hydroxide D) Magnesium Sulphate
 
Answer & Explanation Answer: C) Magnesium Hydroxide

Explanation:
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Filed Under: Chemistry
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18 220343
Q:

Which of the following reactions are exothermic?

 

1)   C + O2   CO22)  2Mg + O2   2MgO3)  CuSO4 + 5H2O   CuSO4.5H2O4)  All the above

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

Explanation:

Here all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.

 

Generally all the combining reactions are exothermic in nature.

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15 217437
Q:

Which word or words explains the meaning of the following idioms:-

A fool’s errand

A) A blunder B) An impossible task
C) A useless undertaking D) None of these
 
Answer & Explanation Answer: B) An impossible task

Explanation:

A fool’s errand means a task that has little to no chance of being successful or beneficial.

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Filed Under: English
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3 217090
Q:

Select the antonym of

apocalypse

A) catastrophe B) miracle
C) decimation D) holocaust
 
Answer & Explanation Answer: B) miracle

Explanation:
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Filed Under: English
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7 215906
Q:

Which are the special proteins in muscles that contract and relax to cause movement?

 

A) Contractile protein B) Receptor protein
C) Structural protein D) Enzymatic protein
 
Answer & Explanation Answer: A) Contractile protein

Explanation:
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Filed Under: Biology
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37 215505
Q:

Select the antonym of

ingestion

A) gulp B) slug
C) excrete D) chug
 
Answer & Explanation Answer: C) excrete

Explanation:
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Filed Under: English
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4 213183
Q:

Simplify the following :

373+353+283-3x37x35x28372+352+282-37x35-35x28-37x28 ?

A) 100 B) 1
C) 4 D) 0
 
Answer & Explanation Answer: A) 100

Explanation:

Given 373+353+283-3x37x35x28372+352+282-37x35-35x28-37x28

 

It is in the form of

 a3+b3+c3-3abca2+b2+c2-ab-bc-ca= a + b + c

 

Here a = 37, b = 35 & c = 28 

 

=> a + b + c = 37 + 35 + 28 = 100

 

 

 

Therefore,   = 100

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Filed Under: Simplification
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26 212711
Q:

Choose the word which is nearest in meaning to the given word:-

Nebulous

A) Tiny B) Vague
C) Insignificant D) Inadequate
 
Answer & Explanation Answer: B) Vague

Explanation:

Nebulous means hazy, Tiny means small, Vague means unclear, Insignificant means unimportant, Inadequate means in sufficient. So, Nebulous is nearest in meaning to Vague.

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Filed Under: English
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3 212527