Questions

Q:

What is the IUPAC name of [Co(NH3)4Cl2]?

A) Tetra-ammine dichloro cobalt (III) chloride B) Tetra-ammine trichloro cobalt (III)
C) Tri-ammine dichloro cobalt (III) chloride D) Tetra-ammine dichloro cobalt
 
Answer & Explanation Answer: A) Tetra-ammine dichloro cobalt (III) chloride

Explanation:

The IUPAC nomenclature in organic chemistry is a systematic method that is used to name organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).

 

The IUPAC name of the given complex [Co (NH₃)₄Cl₂ ]Cl is - Tetra-ammine dichloro cobalt (III) chloride.

 

The complex [Co (NH₃)₄ Cl₂ ] Cl ionizes an aqueous solution to furnish the chloride ion Cl⁻ and [Co (NH₃)₄ Cl₂ ] ⁺.

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Q:

Telecom company Nokia belongs to which country?

A) Denmark B) USA
C) Sweden D) Finland
 
Answer & Explanation Answer: D) Finland

Explanation:

Telecom_company_NOKIA_company_belongs1542268061.png image

NOKIA belongs to the countyry Finland.

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Q:

How many members were Initially  there in the Constituent assembly of India

A) 300 B) 304
C) 308 D) 310
 
Answer & Explanation Answer: A) 300

Explanation:
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42 18333
Q:

The _____ controls communications for the entire computer system

A) arithmetic-logic unit B) semiconductor
C) motherboard D) coprocessor
 
Answer & Explanation Answer: C) motherboard

Explanation:
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69 18320
Q:

NH3 oxidation number?

A) -1 B) +1
C) 0 D) -3
 
Answer & Explanation Answer: C) 0

Explanation:

NH3, Ammonia is a neutral compound as the individual oxidation numbers elements that make up the compound NH3 are Nitrogen (N) and Hydrogen (H) sum to zero. 

We do not speak of the oxidation number of a molecule. We can speak of the oxidation numbers of the individual elements that make up the compound.

 

Here the oxidation number of Nirogen is -3 and that of Hydrogen is +1.

Now, NH3 = 1(-3) + 3(+1) = -3 + 3 = 0.

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Q:

Find the missing number in the following series:

43, 172, 86, 344, ?

A) 172 B) 258
C) 129 D) 430
 
Answer & Explanation Answer: A) 172

Explanation:
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Q:

The basic reason for the extraordinary sparkle of suitably cut diamond is that

A) it has well defined cleavage planes B) it has a very high transparency
C) it has a very high refractive index D) it is very hard
 
Answer & Explanation Answer: C) it has a very high refractive index

Explanation:
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Filed Under: Physics

95 18248
Q:

In an economy , the sectors are classified into public and private on the basis of

A) employment conditions B) nature of economic activities
C) ownership of enterprises D) use of raw materials
 
Answer & Explanation Answer: C) ownership of enterprises

Explanation:
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