Chemistry Questions

Q:

Trichloroacetaldehyde was subject to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

A) Chloroform B) 2, 2, 2-Trichloroethanol
C) Trichloromethanol D) 2, 2, 2-Trichloropropanol
 
Answer & Explanation Answer: B) 2, 2, 2-Trichloroethanol

Explanation:

Cl|Cl-C-CHO|ClCannizzaro's ReactionNaOH Cl|Cl-C-COONa|Cl+ Cl|Cl-C-CH2 |21Cl-OH

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7 4921
Q:

Neutron was discovered by

A) J.J.Thomson B) Chadwick
C) Rrutherford D) Priestley
 
Answer & Explanation Answer: B) Chadwick

Explanation:
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8 4906
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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0 4901
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

Explanation:
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Q:

The number of neutrons in dipositive Zinc ion is

A) 34 B) 36
C) 38 D) 40
 
Answer & Explanation Answer: D) 40

Explanation:
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10 4882
Q:

Select the correct statement (s).

A) When energy is transferred to the system from the surrounding as work, the surrounding do work on the system and the value of work (W) positive. B) When energy is transferred from the system to the surrounding as work, work is done on the surrounding and the value of W is negative.
C) Both (A) and (B) D) None of the above
 
Answer & Explanation Answer: C) Both (A) and (B)

Explanation:
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Q:

The alpha-particles are

A) high energy electrons B) positively charged hydrogen irons
C) high energy x ray radiations D) double positively charged helium nuclei
 
Answer & Explanation Answer: D) double positively charged helium nuclei

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6 4864
Q:

Which of the following statement(s) is/are CORRECT?

I. Bases are soapy to touch.

II. Bases generate OH– ions.

III. Metal oxides dissolve in water to form Acidic solution. 

 

A) Only I and II   B) Only I and II
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: A) Only I and II  

Explanation:
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