NDA CHEMISTRY QUIZ

Question 1:

Which of the following is used in chemistry labs for sealing air-gaps in apparatus where air tight arrangement is required?

Bleaching powder

Washing soda

Gypsum

Plaster of Paris

Question 2:

Which of the following salt is acidic salt ?

Potassium sulphate

Ammonium chloride

Sodium carbonate

Potassium chloride

Question 3:

When electricity is passed through X solution , two gases are released Y and Z along with formation of sodium hydroxide . Y gas is released at cathode and X gas is released at anode .X , Y and Z are

X-NaOH , Y-H₂, Z -Cl₂

X-NaOH , Y-Cl₂, Z -H₂

X-NaCl , Y-H₂, Z -Cl₂

X-NaCl , Y-Cl₂, Z -H₂

Question 4:

Which of the following byproduct of the chlor alkali process is used for the hydrogenation of oils to obtain fats called vegetable ghee ?

Sodium hydroxide

Chlorine

Hydrogen

Nitrogen

Question 5:

A white powder X having strong smell of chlorine is used for bleaching cotton and linen in textile industry for bleaching wood pulp in paper industry . X is

Baking powder

Bleaching powder

Plaster of Paris

Washing soda

Question 6:

Match List I and List II

A-II,B-I,C-III,D-I

A-I,B-I,C-III,D-I

A-II,B-II,C-III,D-II

A-II,B-II,C-III,D-I

Question 7:

Which of the following salt is used to melt ice which collects on the roads during winter in cold countries ?

Potassium chloride

Magnesium chloride

Zinc chloride

Sodium chloride

Question 8:

Which of the following is used in medicines to remove acidity of stomach ?

Baking soda

Common salt

Washing soda

Plaster of Paris

Question 9:

Which of the following salts contains 10 molecules of water in the crystalline state and is used in the manufacture of sodium compounds such as borax?

Glauber’s salt

Blue vitriol

Green vitriol

Washing soda

Question 10:

A salt X when dissolved in distilled water turns blue litmus to red . Salt X is

Combination of strong acid and weak base

Combination of weak acid and strong base

Combination of weak acid and weak base

Combination of strong acid and strong base

NDA CHEMISTRY QUIZ - 26

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NDA CHEMISTRY QUIZ - 26

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