Chemistry · Science General

Common Chemical Compounds and Reactions

1,197 Questions

Common chemical compounds and reactions questions test your knowledge of everyday chemicals, their formulas, and their interactions. Topics include properties of acids and bases, hard water chemistry, and compounds like baking soda and plaster of paris. This section is essential for general science preparation.

Acids and basesPlaster of parisHard water chemistryCommon chemical formulasEveryday chemical reactions

Common Chemical Compounds and Reactions Questions

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties

Which of the following is not an ingredient of clinker?

  1. Calcium silicate

  2. Aluminium silicate

  3. Calcium aluminium silicate

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

In the manufacture of Portland cement, clinker occurs as lumps or nodules, usually $3: mm \ (0.12: in)$ to $25\ mm (0.98: in)$ in diameter, produced by sintering (fused together without melting to the point of liquefaction) limestone and alumino-silicate materials such as clay during the cement kiln stage. Gypsum is not present in it. 

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties

Sodium hydroxide is used in the manufacture of:

  1. pulp and paper

  2. textiles

  3. soap and detergents

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium hydroxide is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner.

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties

Which of the following is used in the manufacture of gun powder?

  1. Chile saltpetre

  2. Nitre

  3. Both A and B

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

Chile saltpetre(Sodium nitrate), is a deliquescent crystalline sodium salt. Nitre is potassium nitrate. They are used in the manufacture of gun powder, nitric acid etc. It is a mixture of sulfur, charcoal, and potassium nitrate (saltpeter).

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties

Common salt besides being used in kitchen can also be used as the raw material for making:
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

  1. (i) and (ii)

  2. (i), (ii) and (iv)

  3. (i) and (iii)

  4. (i), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A. Baking soda is sodium hydrogen carbonate which is prepared by Solvay process which is the reaction of sodium chloride,ammonia and carbon dioxide in water. The calcium carbonate is used in the reaction to get carbon dioxide gas.
${ CaCO } _{ 3 }\rightarrow CaO+{ CO } _{ 2 }\ { 2NH } _{ 3 }+{ CO } _{ 2 }+{ H } _{ 2 }O\rightarrow \left( { NH } _{ 4 } \right) _{ 2 }{ CO } _{ 3 }+{ CO } _{ 2 }+{ H } _{ 2 }O\rightarrow { NH } _{ 4 }{ HCO } _{ 3 }\ { NH } _{ 4 }{ HCO } _{ 3 }+NaCl\rightarrow { NaHCO } _{ 3 }+{ NH } _{ 4 }Cl$
B. Washing soda is sodium carbonate which is prepared from the sodium chloride.
$2NaCl+{ CaCO } _{ 3 }\rightarrow { Na } _{ 2 }{ CO } _{ 3 }+Ca{ Cl } _{ 2 }$

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties
 Column A  Column B
 A. Bleaching powder  i. Preparation of glass
 B. Baking soda  ii. Production of $H _2$ and $Cl _2$
 C. Washing soda  iii. Decolourisation
 D. Sodium chloride  iv. Antacid

Match the chemical substances given in Column (A) with their appropriate application given in Column (B).

  1. A(ii), B(i), C(iv), D(iii)

  2. A(iii), B(ii), C(iv), D(i)

  3. A(iii), B(iv), C(i), D(ii)

  4. A(ii), B(iv), C(i), D(iii)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A. Bleaching powder is calcium hypochlorite
${ 2CaOCl } _{ 2 }+{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { CaCl } _{ 2 }+{ CaSO } _{ 4 }+2HClO\ HClO\rightarrow HCl+\left[ O \right] \xrightarrow { Coloured\quad matter } Colourless\quad product$
B. Baking soda is sodium bicarbonate which is basic in nature and used as an antacid.
${ NaHCO } _{ 3 }$
C. Sodium carbonate which has a common name washing soda, a monohydrate which is used in the preparation of glass. It is used to flux silica by lowering down the temperature.
Two forms of sodium carbonate are used i.e heavy and light. The light form is obtained first and is converted to heavy form. The heavy form is is used as a solid in making glass where it is used as flux in the melting of silica.${ Na } _{ 2 }{ CO } _{ 3 }\cdot { H } _{ 2 }O$
D. The electrolysis of aqueous solution of sodium chloride gives hydrogen at the cathode and chlorine at the anode. This solution is called as the brine solution. It helps in the evolution of hydrogen gas and chloride gas.

Multiple choice chemistry chemistry in everyday life common salt some useful compounds in everyday life salts and their properties
State True or False.
Decomposition of calcium phosphate present in bone ash with concentrated sulphuric acid produces phosphoric acid.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bone ash is Tricalcium phosphate in the form of hydroxyapatite ${ Ca } _{ 5 }\left( OH \right) { \left( P{ O } _{ 4 } \right)  } _{ 3 }$. Phosphoric acid is obtained from hydroxyapatite when treated with sulphuric acid.
$2{ Ca } _{ 5 }{ \left( P{ O } _{ 4 } \right)  } _{ 3 }OH+10{ H } _{ 2 }S{ O } _{ 4 }+18{ H } _{ 2 }O\longrightarrow 6{ H } _{ 3 }P{ O } _{ 4 }+10CaS{ O } _{ 4 }.2{ H } _{ 2 }O$

Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

The reagent commonly used to determine hardness of water titrimetrically is:

  1. Oxalic acid

  2. Disodium salt of EDTA

  3. Sodium citrate

  4. Sodium thiosulphate

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The total hardness of water (i.e. the concentration of dissolved cations such as $Ca^{2+}, Mg^{2+}, Fe^{3+}$ etc.) is commonly determined by the titration of a water sample with a standardized solution of the disodium salt of ethylenediaminetetraacetic acid (EDTA) using eriochrome black T or calmagite as an indicator. Calmagite has the advantage of forming indefinitely stable solutions and will be substituted without any other modification to the procedure.
Hence option B is correct.

Multiple choice evs food components simple test for nutrients test for nutrients protein and its function energy from different food components nutrients and foodstuffs

Which of the following foods turns blue-black with iodine solution?

  1. Milk

  2. Groundnut

  3. Tomato

  4. Raw potato
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Raw potato contains approximately 17% starch. when iodine solution added to the raw potato sample, it turns blue-black. Iodine reacts with the starch present in the raw potato which results in the formation of blue-black colored complex. 

Hence option D is the correct answer.

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

Metallic sodium is used as a drying agent for :

  1. chloroform

  2. cyclohexane

  3. diispropyl ether

  4. diethylamine
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

A. Chloroform - calcium chloride,phosphorous pentoxide are used as drying agent.
B. Cyclohexane - sodium,lithium aluminium hydride.
C. Diisopropyl ether - calcium chloride,sodium
D. Diethlyamine - simple distillation.

Multiple choice chemistry acids, bases and salts common salt some useful compounds in everyday life salts and their properties

The salt we use in our food is:

  1. $NaCl$
  2. $CaCl _2$
  3. $KCl$
  4. $MgCl _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sodium chloride$(NaCl)$, also known as common salt is used in food. It is obtained by evaporation of sea water.

However other salts like $MgCl _2,CaCl _2,KCl$ are used in replacement therapy and given when their amount in the body goes down.
Hence, the correct answer is option (A).

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) biological importance of sodium and potassium biological importance of elements biological importance of s block elements

When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed.
Which material should be used if there is a spillage of metallic sodium?

  1. Dilute hydrochloric acid

  2. Ethanol

  3. Sand

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

Sand can be used if there is a spillage of metallic sodium as sand will have no reaction with sodium metal and it serves as a coating to protect sodium from any reaction.