Tag: acids, bases and salts

Quizzes (14) Questions (84)

Questions Related to acids, bases and salts

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

Which of the following is used for dissolution of gold ? 

  1. Hydrochloric acid

  2. Sulphuric acid

  3. Nitric acid

  4. Aqua regia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gold,palladium,gallium are all noble metals which are dissolved in aqua regia. It is also known as royal water which is a mixture of hydrochloric acid and nitric acid in the ratio of 3:1 respectively.

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

Which of the following acid is used in fire extinguishers?

  1. Hydrochloric acid

  2. Sulphuric acid

  3. Nitric acid

  4. Oxalic acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sulphuric acid is non flammable so soda acid is most common fire extinguisher. Carbon dioxide is liberated by the action of sulphuric acid on baking soda or sodium bicarbonate. This increases the percentage of carbon dioxide in air. Due to this the supply of air is cut off and fire is extinguished.

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

Which of  the following acids is called the king of the acids?

  1. Acetic acid

  2. Phosphoric acid

  3. Oxalic acid

  4. Sulphuric acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulphuric acid is diprotic acid and shows different properties depending upon its concentration. It is a strong acid and in concentrated form it has strong dehydrating and oxidising properties. It has large number of applications. In almost all industrial processes sulphuric acid is used,in production of lead acid batteries,production of fertilizers,in chemistry labs,petroleum refining and production of paper. So it is called as the king of all acids.

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

The acid generally stored in batteries is :

  1. sulphuric acid

  2. nitric acid

  3. hydrochloric acid

  4. acetic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sulphuric acid develops voltage from the chemical reaction produced when two unlike materials such as the positive and negative plates are immersed in the electrolyte a solution of sulphuric acid and water. In typical lead-acid battery the voltage is approx. 2 volts per cell for a total of 12 volts.

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

Soda-acid fire extinguisher extinguishes the fire by :

  1. cutting the supply of air

  2. removing the combustible substance

  3. raising the ignition temperature

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The principle of working of fire extinguisher is based on either of the following three conditions: 
• cooling the combustible material below its ignition temperature, or 
• cutting off the supply of air, or 
• cooling the combustible material and at the same time cutting the supply of air. 

Multiple choice salts salts and their classification acids, bases and salts chemistry

Which of the following does NOT form an acidic salt?

  1. Phosphoric acid

  2. Carbonic acid

  3. Hydrochloric acid

  4. Sulphuric
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An acidic salt is formed by the partial replacement of replaceable hydrogen ions from a polybasic acid. Carbonic acid (H2CO3) is a weak acid that typically dissociates completely or forms neutral salts, whereas others like phosphoric or sulphuric acids have multiple replaceable hydrogens allowing for acidic salt formation.

Multiple choice salts salts and their classification acids, bases and salts chemistry

Lime water + sulphuric acid $\rightarrow$

  1. Heat + Calcium sulphate

  2. Water + Heat

  3. Calcium sulphate + Water + Heat

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lime water/calcium hydroxide $Ca(OH) _2$ is a strong base and sulphuric acid $H _2SO _4$ is a strong acid as they undergo complete dissociation in solution.

When acid and base react with each other, the base neutralizes the acid, leading to the formation of salt and water.
This reaction is known as neutralization reaction and it is exothermic in nature (since heat is released due to formation of new bonds in the reaction).
Thus, more stronger the acid and the base, more amount of heat is released.
$Ca(OH) _2 + H _2SO _4 \rightarrow CaSO _4+2H _2O + Heat$.
Hence, the correct answer is option (C).

Multiple choice salts salts and their classification acids, bases and salts chemistry

Which technique produces a compound which is not soluble in water?

  1. Conductivity

  2. Calorimetry

  3. Precipitation

  4. Spectrophotometry
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A reaction occurs when you mix two aqueous solutions. This is when you will find out whether a precipitate will form or not. A precipitate forms if the product of the reaction is insoluble in water.

Precipitation occurs when cations and anions in the aqueous solution combine to form an insoluble ionic solid called a precipitate.
Conductivity is the property to conduct electricity, calorimetry is the process of measuring the heat of chemical reactions and spectrophotometry is the measurement of reflection or transmission properties of the material as a function of wavelength.
Since precipitation produces a compound which is not soluble in water, the correct answer is the option (C).

Multiple choice salts salts and their classification acids, bases and salts chemistry

When the aqueous solution of silver nitrate and sodium chloride are mixed, a________ precipitate is immediately formed.

  1. yellow

  2. white

  3. red

  4. black
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When silver nitrate $(AgNO _3)$ reacts with sodium chloride $(NaCl)$ a white precipitate of silver chloride $(AgCl)$ is formed which is highly insoluble in water, along with formation of sodium nitrate $(NaNO _3)$.

Since $(AgCl)$ is insoluble in water it will precipitate out and $(NaNO _3)$ is soluble in water so it will remain dissolved in the mixture. This reaction is an example of double displacement reaction and it occurs as follows:-
$AgNO _3\ +\ NaCl \rightarrow AgCl\ +\ NaNO _3 $
Hence, the correct answer is the option (B).