Questions

Q:

The compound MgCl2 is named

A) Magnesium Chloride B) Magnesium Chlorine
C) Magnesium Dichloride D) Dimagnesium Chloride
 
Answer & Explanation Answer: A) Magnesium Chloride

Explanation:

The compound MgCl2 is named as Magnesium Chloride.

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Filed Under: Chemistry
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Q:

In the below puzzle, there are 2 double blanks. Fill in the blanks with the same pair of letters to complete an English word. For example, use the letter-pair ac in b__kp__k to make the word backpack

v _ _ lat _ _ n

Answer

violation

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Subject: Word Puzzles

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Q:

The shorter i am, the bigger i am.

What am I?

Answer

A Temper.

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Q:

Who is the first woman in space ?

A) Sunitha Williams B) Valentina Tereshkova
C) Masida namisha D) Tamara Press
 
Answer & Explanation Answer: B) Valentina Tereshkova

Explanation:

Valentina Tereshkova is the first woman to have flown into space

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Filed Under: World History

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Q:

A Fuse is used in mains electric supply as a safety devices. Which one of the following statements about the fuse is correct?

A) It is connected in parallel with the main switch B) It is made mainly from silver alloys
C) It must have a low melting point D) It must have a very high resistance
 
Answer & Explanation Answer: C) It must have a low melting point

Explanation:
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Filed Under: Physics

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Q:

Who Invented Elevator Safety Brake ?

A) Alfred Bernhard Nobel B) Elisha Graves Otis
C) Percy LeBaron Spencer D) Garrett Augustus Morgan
 
Answer & Explanation Answer: B) Elisha Graves Otis

Explanation:
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Filed Under: Inventions

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Q:

The rate of heartbeat is accelerated by the harmone

A) adrenaline B) acetylcholine
C) thyroxine D) pituitrin
 
Answer & Explanation Answer: A) adrenaline

Explanation:

The hormone adrenaline also called epinephrine is known as a stress harmone. In emotional upset (like fear, anger etc.) this harmone is poured into the blood and it accelerates heart beat. The hormone acetylcholine decelerates heartbeat rate.

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Filed Under: Biology

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Q:

Number of moles of CO2 present in 24 grams of carbon is

A) 0.5 B) 1
C) 2 D) 0.25
 
Answer & Explanation Answer: C) 2

Explanation:

1 mole of CO2 contain 12gms of carbon and 44 gms of CO2

therefore  24 gms of carbon is present in 88 gms of CO2 or 2 moles of CO2

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Filed Under: Chemistry

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