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Q:

Which statement best describes an O3 molecule?

A) The double bond in ozone switches back and forth between the two outer oxygen atoms B) An ozone molecule contains one single bond and one double bond
C) Each atom in ozone is connected to another atom by 1.5 bonds. D) None
 
Answer & Explanation Answer: B) An ozone molecule contains one single bond and one double bond

Explanation:

Ozone molecule has one single bond and one double bond.

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Q:

Which of the following is a property of an acid?

 

A) Acids reacts with metals B) Acids taste sour
C) Acids turn blue litmus paper red D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

The general properties of acids are as follows :-

1.They are sour to taste.

2.They turn blue litmus paper red but the red litmus paper have no effect of acids and it remains unaffected.

3.They release hydrogen ions H+ in the solution medium, making the conditions acidic.

 

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Filed Under: Chemistry
Exam Prep: Bank Exams

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Q:

Which one of the following is not radioactive

A) Astanine B) Francium
C) Tritium D) Zirconium
 
Answer & Explanation Answer: D) Zirconium

Explanation:
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Filed Under: Chemistry

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Q:

The lines joining the place of equal intensity of seismic waves are known as

A) Seisimice line B) Isoseisimic line
C) Isogonal line D) Isogonic line
 
Answer & Explanation Answer: B) Isoseisimic line

Explanation:
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Filed Under: World Geography

7 6943
Q:

Ankara is the capital of which country?

A) Uruguay B) Turkey
C) Uganda D) Vanuatu
 
Answer & Explanation Answer: B) Turkey

Explanation:
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Filed Under: Country Capitals

80 6940
Q:

Which compound contains both ionic and covalent bonds?

A) NaNO3 B) CaSO4
C) NH4Cl D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Here all the given compounds have both ionic and covalent bonds.

 

NaNO3 - In Sodium nitrate, Nitrate is covalently bonded as nitrogen is bonded with 3 oxygen atoms. And this nitrate is ionically bonded with sodium.

 

CaSO4 - In Calcium sulphate, sulphate is covalently bonded as sulphur is bonded with 4 oxygen atoms. And this sulphate is ionically bonded with calcium.

 

NH4Cl - In Ammonium chloride, ammonium is covalently bonded as nitrogen is bonded with 4 hydrogen atoms. And this ammonium is ionically bonded with chlorine.

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5 6932
Q:

The himalayas are approximately ______ kilometer broad 

A) 150 to 400 B) 200 to 400
C) 150 to 300 D) 250 to 500
 
Answer & Explanation Answer: A) 150 to 400

Explanation:
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Filed Under: Indian Geography

19 6927
Q:

Which of the following has the highest entropy?

A) Hydrogen B) Diamond
C) Liquid nitrogen D) Mercury
 
Answer & Explanation Answer: A) Hydrogen

Explanation:

Entropy is a measure of disorder . It will be maximum in gases followed by liquids and least in solids.

 

Hence, here the gas is only hydrogen and it has the highest entropy.

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