RRB GROUP D Chemistry Quiz

Question 1:

The difference in angular momentum of revolving electron in 4^th orbit to that of 6^th orbit is

h/ π

2h/ π

h π

3h/2 π

Question 2:

25 mL of water is added in an acidic solution . This result in

Increase in concentration of H+ ions

Decrease in concentration of H+ ions

Decrease in concentration of OH- ions

No change in the concentration of H+ ions

Question 3:

Successive ionization enthalpy always

Increase

Decrease

Remains constant

First increase then decrease

Question 4:

Which one of the following statements is NOT correct for the given reaction?

Iron is the oxidizing agent

The solution turns green in colour after the reaction

Copper is less reactive metal than iron

The reaction is an example of a redox reaction

Question 5:

Which one of the following metal release H₂gas when react with HNO₃ solution ?

Au

Na

Mn

Fe

Question 6:

Calcium oxide reacts vigorously with water to produce slaked lime whose solution is used for white – washing walls . This slaked lime reacts with component A in air to form a thin layer of component B to give a shiny finish . What are the component A and B ?

A – O2 ; B – CaCO3

A-CO2 ;B - Ca(OH)2

A- O2 ; B-Ca(OH)2

A- CO2 ; B-CaCO3

Question 7:

In Newland law of octaves ,

Every fifth element is similar to the first element .

Every eighth element is similar to the second element .

Every eighth element is similar to the third element .

Every eighth element is similar to the first element .

Question 8:

A solution is prepared by dissolving 100 mL of Hydrogen peroxide in enough water to make 1000 mL of solution . The concentration of Hydrogen peroxide is

10%

15%

20%

25%

Question 9:

Hydrides of non metal-

are covalent hydrides
conduct electricity
do not conduct electricity
may be acidic, basic or neutral

1,2

1,3,4

1,4,2

2,4

Question 10:

Urea is a nitrogen-release fertilizer. It contains

50% nitrogen

46% nitrogen

35% nitrogen

50% nitrogen

RRB GROUP D Chemistry Quiz - 70

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RRB GROUP D Chemistry Quiz - 70

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