NDA CHEMISTRY QUIZ

Question 1:

A numismatist has collecting gold coins , silver coins and copper coins for a long time. One day he observed a black coating on silver coins and green coating on copper ions . Chemical formula of black and green coating is

Silver carbonate , basic copper oxide

Silver sulphide , basic copper carbonate

Silver chloride , basic copper carbonate

Silver sulphide , basic copper sulphide

Question 2:

A white colour X compound is exposed to light , it decomposes to form Y and a gas Z is released .Z is used for disinfecting drinking water and Y is used to make jewellery. X , Y and Z are

AgCl , Ag , Br₂

AgCl , Ag , Cl₂

AgBr , Ag , Cl₂

AgBr , Ag , Br₂

Question 3:

Silver bromide is stored in dark bottles because

It undergo oxidation in presence of light

It undergo decomposition in presence of light

It undergo reduction in absence of light

It is highly reactive in presence of light

Question 4:

Concentrated sulphuric acid reacts with copper to form sulphur dioxide gas . In this reaction conc sulphuric acid acts as a

Oxidizing agent

Reducing agent

Dehydrating agent

Bleaching agent

Question 5:

Copper vessel has a green coating in rainy season because

It reacts with carbon dioxide in air
It forms basic copper carbonate
It forms copper oxide
It reacts with oxygen gas in air

1,2

2,3,4

2,3

3,4

Question 6:

A silver ware is kept in a solution of copper sulphate. What change do you expect?

Silver displaces the copper

Blue colour of copper sulphate disappear

Formation of silver mirror on the walls of test tubes

No reaction takes place

Question 7:

On heating blue coloured powder of copper nitrate in a boiling tube , X(black) , oxygen gas and a brown gas Y is formed .X and Y are

Copper , nitrogen dioxide

Copper , nitric oxide

Copper oxide , nitrogen dioxide

Copper nitrite , nitrogen gas

Question 8:

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite , white precipitate X is formed. Then on adding dilute hydrochloric acid to the reaction mixture , white precipitate disappear and a Y gas is released. X and Y are

Barium sulphate , nitrogen dioxide

Barium sulphite , sulphur dioxide

Sodium chloride , sulphur dioxide

Barium sulphate , water

Question 9:

DIRECTIONS: Read the following two statements and choose the correct answer.

Statement 1 – On adding an aqueous solution of sodium hydroxide to an aqueous solution of copper sulphate , copper hydroxide and sodium sulphate is formed.

Statement 2 – This is a type of double displacement reaction

Statement 1 is correct but 2 is incorrect

Statement 2 is correct but 1 is incorrect

Both statements are correct

Both statements are incorrect

Question 10:

A strip of metal X is dipped in copper sulphate solution . After sometime , blue colour of solution fades result in formation of Y . Metal X is used in galvanization. X and Y are

Copper , zinc sulphate

Iron , iron sulphate

Zinc , copper sulphate

Zinc , zinc sulphate

NDA CHEMISTRY QUIZ - 30

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

Question 6:

Question 7:

Question 8:

Question 9:

Question 10:

Time Left : 00:00:00

NDA CHEMISTRY QUIZ - 30

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

Question 6:

Question 7:

Question 8:

Question 9:

Question 10:

Time Left : 00:00:00

Welcome

GET THE APP

Verify Your Mobile Number