Chemistry Questions

Q:

Which type of molecule is CF4?

A) nonpolar, with a symmetrical distribution of charge B) polar, with an asymmetrical distribution of charge
C) nonpolar, with an asymmetrical distribution of charge D) polar, with a symmetrical distribution of charge
 
Answer & Explanation Answer: A) nonpolar, with a symmetrical distribution of charge

Explanation:

CF4 is tetrahedral.

Since the four 'F' atoms have the same electronegativity values, there is no bias in electron distribution toward any one.

 

Therefore, electron/charge distribution is symmetrical, which also means that the molecule is nonpolar.

 

Hence, CF4 is nonpolar molecule with a symmetrical distribution of charge.

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Q:

In photography, the compound of nitrogen used is 

A) Potassium nitrate B) Silver nitrate
C) Ammonium carbonate D) Ammonium bicarbonate
 
Answer & Explanation Answer: B) Silver nitrate

Explanation:

Silver nitrate is the basic substance from which silver bromide is obtained. The photographic films are impregnated with the light sensitive AgBr.

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Q:

What is the heaviest noble gas?

A) krypton B) radon
C) helium D) xenon
 
Answer & Explanation Answer: B) radon

Explanation:

The seven elements — helium, neon, argon, krypton, xenon, radon, and oganesson of Group 18 of the periodic table are Noble or Inert gases.

 

Radon is the heaviest and Helium is the lightest gases of the noble gases.

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Q:

The bonds in the compound MgSO4 can be described as

A) covalent B) ionic
C) both A & B D) None of the above
 
Answer & Explanation Answer: C) both A & B

Explanation:

Here the given compound is MgSO4.

In the given compound, Sulphur (S) and Oxygen (O) are two non metals and Magnesium (Mg) is a metal.

In this compound, Sulphur and Oxygen reacts to form covalent bond and the metal Magnesium reacts with both non metals Sulphur and Oxygen to form ionic bonds.

 

Hence, in the given compound MgSO4 there are both covalent and ionic bonds.

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Q:

Which compound forms a colored aqueous solution?

A) CrCl3 B) KBr
C) CaCl2 D) NaOH
 
Answer & Explanation Answer: A) CrCl3

Explanation:

Colored aqueous solutions are a characteristic of transition compounds.

The only transition compound in the above choices is CrCl3.

Cr is a transition element.

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Q:

"If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other". This is a statement of 

A) Cyclic rute B) Zeroth law of thermodynamics
C) First law of thermodynamics D) Second law of thermodynamics
 
Answer & Explanation Answer: B) Zeroth law of thermodynamics

Explanation:
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Q:

Which acid is present in tomato?

A) Sulphuric acid B) HCl
C) Both A & B D) Citric acid
 
Answer & Explanation Answer: D) Citric acid

Explanation:

which_acid_is_present_in_tomato1542371895.jpg image

Citric acid is present in tomatoes.

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Q:

Give a possible molecular formula for C3H5ClO?

A) C6H10Cl2O2 B) C6H10O2
C) C6H10ClO2 D) C6H12Cl2O2
 
Answer & Explanation Answer: A) C6H10Cl2O2

Explanation:
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