Tag: chemistry in everyday life

Questions Related to chemistry in everyday life

________ is a phosphatic fertilizer.

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

  1. Super phosphate

  2. Super sulphate

  3. Urea

  4. All of these

Show answer
Correct Option: A
Explanation:

Super phosphate of lime is a mixture of two salts calcium dihydrogen phosphate $Ca\left( { H } _{ 2 }{ PO } _{ 4 } \right) _{ 2 }$ and calcium sulfate dihydrate ${ CaSO } _{ 4 }\cdot { 2H } _{ 2 }O$

A mixture of sand, salt and water can be separated by using which of the following processes?

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

  1. Only evaporation

  2. Only sedimentation

  3. Decantation and filtration

  4. Filtration, evaporation and condensation

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Correct Option: D
Explanation:

First by filtration sand can be separated from the mixture of sand, salt and water. Then by evaporation the water will get evaporated leaving behind the salt. The evaporated vapours can be collected and condensed to get water.

The main use of salt in the diet is to:

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

  1. make the taste of food better

  2. produce in small amounts the hydrochloric acid required for the digestion of food

  3. ease the process of cooking

  4. increase the solubility of food particles in water

Show answer
Correct Option: B
Explanation:

Salt plays a primary role in the process of digestion and absorption. Salt plays a role in digestion by helping to break down food. It creates hydrochloric acid which is very important digestive secretion lining the stomach walls. Salt helps the body to digest food.

Gypsum is added to cooled clinker during cement manufacture:

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

  1. because gypsum permits formation of fine powder

  2. to delay the initial setting time of cement

  3. to increase the hardening of cement

  4. to increase the strength of set concrete

Show answer
Correct Option: B
Explanation:

Gypsum is a mineral and is hydrated calcium sulfate in chemical form. Gypsum plays a very important role in controlling the rate of hardening of the cement. During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process.

Gypsum is added to control the “setting of cement”. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing.

Gypsum is added to cement because:

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

  1. it makes the cement very hard

  2. it increases the pace of setting of cement

  3. it slows down the initial setting of cement when water is added

  4. none of the above

Show answer
Correct Option: C
Explanation:

Gypsum plays an important role in controlling the rate of hardening of the cement. During cement manufacturing process upon cooling of clinker a small amount of gypsum is added during the final grinding process. Gypsum controls the setting of the cement and if not added the cement will set immediately leaving no time for concrete placing.

Which of the following imparts purple colour to glass?

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

  1. ${Cr} _{2}{O} _{3}$

  2. $Au{Cl} _{3}$

  3. ${Cu} _{2}O$

  4. $Mn{O} _{2}$

Show answer
Correct Option: D
Explanation:

 $MnO _2$which is black, is used to remove the green color from the glass and imparts purple tint to the glass. $Cr _2O _3$ imparts dark green colour, $Cu _2O$ produces a turquoise color, and $AuCl _3$ gives ruby red coloured glass.

Which of the following is not an ingredient of clinker?

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

  1. Calcium silicate

  2. Aluminium silicate

  3. Calcium aluminium silicate

  4. Gypsum

Show answer
Correct Option: D
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. 

Potash alum is widely used in:

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

  1. water treatment

  2. air treatment

  3. land treatment

  4. all of the above

Show answer
Correct Option: A
Explanation:

Potash alum is widely used in water treatment plant for clarification of water.

Sodium hydroxide is used in the manufacture of:

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

  1. pulp and paper

  2. textiles

  3. soap and detergents

  4. all of the above

Show answer
Correct Option: D
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.

What is used in photography for developing films?

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

  1. Silver nitrate

  2. Silver bromide

  3. Silver iodide

  4. Silver chloride

Show answer
Correct Option: B,D
Explanation:

Light sensitive compounds are used in photography for developing films. Halides of silver like silver chloride and silver bromide shows such kinds of properties therefore used in photography.