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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:   B) N, P Au



Explanation:
Subject: Chemistry
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Q:

Which electron dot formula represents a polar molecule?

A) A B) B
C) C D) D
 
Answer & Explanation Answer: B) B

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0 858
Q:

Which molecule contains a polar covalent bond?

A) NBr3 B) C2H4
C) ZnS D) AgL
 
Answer & Explanation Answer: A) NBr3

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1 931
Q:

A standard drink is generally

A) 5 oz Glass of Wine B) 12 oz Beer    
C) 1.5 oz of Hard Liquor D) All the above
 
Answer & Explanation Answer: D) All the above

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2 946
Q:

What is the other name of sodium carbonate?

A) Baking soda B) Washing soda
C) Baking powder D) No option is correct
 
Answer & Explanation Answer: B) Washing soda

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0 747
Q:

What is the ratio of masses of hydrogen and oxygen in the water?

A) 1 : 4 B) 1 : 8
C) 1 : 16 D) 1 : 64
 
Answer & Explanation Answer: B) 1 : 8

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0 1005
Q:

Which of the following causes acid rain?

I. SO2

II. NO2

III. CO2

 

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

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0 13848
Q:

Propyne and propene can be distinguished by

A) AgNO₃ in ammonia B) conc. H₂SO₄
C) dil. KMnO₄ D) Br₂ in CCl₄
 
Answer & Explanation Answer: A) AgNO₃ in ammonia

Explanation:

Propene, being an alkene, and propyne, being a alkyne, are distinguished using the common chemical tests namely ammoniacal silver nitrate or ammoniacal cuprous chloride. Ammoniacal silver nitrate is also called as Tollen's reagent.

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1 683
Q:

Which among the following has highest electron affinity?

A) Chlorine B) Fluorine
C) Helium D) Xenon
 
Answer & Explanation Answer: A) Chlorine

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