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Q:

Which reaction occurs spontaneously?

A) Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq) B) I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
C) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq) D) I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)
 
Answer & Explanation Answer: C) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)

Explanation:

In this chemical reaction chlorine change oxidation number from 0 to -1 (reduction) and bromine change oxidation number from -1 to 0 (oxidation).

Chlorine is stronger oxidation reagent than bromine.

In VIIA or group 17 (halogen elements) there are six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessin(Ts).

They have high electronegativity because they have seven valence electrons in their outermost energy level, so they can gain an electron to have the octet rule.  

Going down in the group, element are weaker oxidazing reagent and less reactive.

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Filed Under: Chemistry
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Q:

The atoms of the elements having same mass number but different atomic number are called

A) Isotopes B) Isobars
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isobars

Explanation:
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Q:

The Buddhist  Doctrines were written in 

A) Sanskrit B) Pali
C) Tibetan D) Not written in any language but orally transnitted
 
Answer & Explanation Answer: B) Pali

Explanation:
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Filed Under: Indian History

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Q:

In which conference of 1888, the constitution was created for Congress?

 

A) Bombay B) Calcutta
C) Madras D) Allahabad
 
Answer & Explanation Answer: D) Allahabad

Explanation:
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Filed Under: Indian Politics
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Q:

Telangana region represents one of the following types of vegetation?

A) Tropical deciduous B) Thorn
C) Tropical ever green D) Sub - tropical decidual
 
Answer & Explanation Answer: B) Thorn

Explanation:
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Filed Under: Indian Geography

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Q:

The universal donor belongs to blood group

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

Explanation:

The persons with 'O' blood group do not have antigens in the red corpuscles. So that blood will not cause agglutination of corpuscles if mixed with any type of blood. So group 'O' persons are called universal donors.

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Filed Under: Biology

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Q:

Explain hospitality in terms of hotel industry ?

Answer

Hospitality actually means, taking care of guests in the best possible way.


Organizing, providing services and looking care after guests is included in it.


It means friendly and generous treatment of guests. 


Hospitality industry includes all companies involved in providing services for guests. They provide more mental satisfaction than tangible objects.

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Subject: Hospitality

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Q:

Which one of the following can be oxidised to the corresponding carbonyl compound:

A) 2-methyl-2-hydroxy propane B) 2-hydroxy propane
C) o-Nitrophenol D) Phenol
 
Answer & Explanation Answer: B) 2-hydroxy propane

Explanation:
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