Which of the following ions is colourless in aqueous solution

1.  Ti3+

2.  Cu2+

3.  Ni2+

4.  Zn2+

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4
Correct Answer :

Zn<sup>2+</sup>


Explanation :
No Explanation available for this question

X liter of carbon monoxide is present at STP. It is completely oxidized to CO2. The volume of CO2 formed is 11.207 litres. What is the value of X in litres

1.  22.414

2.  11.207

3.  5.6035

4.  44.828

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4
Correct Answer :

11.207


Explanation :
No Explanation available for this question

While phosphorus form PCl5, nitrogen does not form NCl5 because

1.  Nitrogen is more electro negative than phosphorus

2.  Nitrogen atom is smaller than phosphorus

3.  The ionisation energy of nitrogen is greater than that of phosphorus

4.  Unlike phosphorous, nitrogens has no d-orbital in its valence shell

View Answer  
4
Correct Answer :

Unlike phosphorous, nitrogens has no d-orbital in its valence shell


Explanation :
No Explanation available for this question

The reagent used for concentrating silver ore is

1.  HI

2.  HNO3

3.  KCN

4.  NH3

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4
Correct Answer :

KCN


Explanation :
No Explanation available for this question

The metal that has the highest electrical conductivity is

1.  Al

2.  Cu

3.  Ag

4.  Au

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4
Correct Answer :

Ag


Explanation :
No Explanation available for this question

Which one of the following is not an allotrope of carbon

1.  Graphite

2.  Diamond

3.  Soot

4.  Carborundum

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4
Correct Answer :

Carborundum


Explanation :
No Explanation available for this question

Alcohol manufactured from water gas is

1.  Ethanol

2.  Butanol

3.  Methanol

4.  Isobutanol

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4
Correct Answer :

Methanol


Explanation :
No Explanation available for this question

Thermite is a mixture of iron oxide and

1.  Sodium shavings

2.  Aluminium powder

3.  Zinc powder

4.  Potassium metal

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4
Correct Answer :

Aluminium powder


Explanation :
No Explanation available for this question

The formula of a metal chloride is MCl3, it contains 20% of the metal. The atomic weight of the metal is approximately

1.  26.5

2.  11.8

3.  21.3

4.  106.5

View Answer  
4
Correct Answer :

26.5


Explanation :
No Explanation available for this question

The metal that forms a self protecting film of oxide to prevent corrosion is

1.  Cu

2.  Al

3.  Pt

4.  Au

View Answer  
4
Correct Answer :

Al


Explanation :
No Explanation available for this question
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