9th Chemistry Unit 18 Chemical Industries MCQs Sindh Board

9th Grade Chemistry Chapter 18 Chemical Industries Sindh Board MCQs Notes Online Chapter Wise Question Answers. Sindh Boards Chemistry Subject Notes For Exams Preparations Karachi, Jamshoro, Sindh Boards. Chemistry class Ninth sindh board notes Unit 18 Chemical Industries Most Repeated Multiple Choice Questions With Answers. Chemistry notes for class IX sindh board karachi Boards.

9th Chemistry MCQs Sindh Board

Q.1: Sodium hydroxide is prepared at large scale by the following methods.?

1. Saponification method
2. Hydrolysis
3. Electrolytes process
4. None of these

C

Q.2: Sodium hydroxide at 318 ^oC:?

1. Does not melt
2. Melts to a clear liquid
3. Melts with decomposition
4. None of these

B

Q.3: Carbon dioxide and sodium hydroxide react to give:?

1. Sodium and carbon monoxide
2. Sodium carbonate only
3. Sodium carbonate and water
4. Sodium metal and Water

C

Q.4: When sodium hydroxide reacts with ammonium chloride it liberates gas:?

1. Hydrogen
2. Ammonia
3. Oxygen
4. Carbon dioxide

B

Q.5: Sodium hydrogen carbonate used in medicine which of the effects it causes in the stomach?

1. Increase the basicity
2. Increase the acidity
3. Decrease the basicity
4. Neutralize the acidity

D

Q.6: The product / products obtained by reaction of sodium carbonate with carbon dioxide in aqueous medium is / are:?

1. Sodium oxide
2. Sodium carbonate and water
3. Sodium Hydroxide
4. Sodium hydrogen carbonate

D

Q.7: Carbonates and bicarbonates of sodium are manufactured by:?

1. Ammonia solvay process
2. Habers method
3. Ostwalds process
4. Contact method

A

Q.8: Detergents are cleansing agents prepared from:?

1. Hydrocarbon and a sulphonate
2. Sulphonate only
3. Hydrocarbons only
4. Water soluble sodium salts

A

Q.9: The material which softens on heating and hardens on cooling come under the class:?

1. Formica
2. Thermoplastic
3. Bakelite
4. Thermosetting plastic

D

Q.10: The class of plastic that can only be heated once before they set on cooling is?

1. Cellulose nitrate
2. Cellulose acetate
3. Thermoplastic
4. Thermosetting plastic

D

Q.11: The polymer which is used in the manufacture of bags for shipping purpose is:?

1. Araldite
2. Expose resin
3. Poly vinyl chloride
4. Poly ethylene

D

Q.12: Cameras, radios, telephone sets, etc are prepared from:?

1. Cellulose nitrate
2. Poly vinyl chloride
3. Bakelite
4. Polythene

C

Q.13: The pigments used to produce white colour are:?

1. Ferric oxide
2. Chromium oxide
3. Zink sulphate
4. Oxides of iron

A

Q.14: Varnishes are used:?

1. Without pigments
2. Without resins
3. Without driers
4. With pigments

A

Q.15: Which of the following constituents of shoe polish issued to provide shinning to the shoes:?

1. Bees wax
2. Soap
3. Sodium hydroxide
4. Pearl ash

A

Q.16: The common ingredients used in black and brown show polishes is?

1. Turpentine Oil
2. Pearl ash
3. Animal Charcoal
4. Nigrosine oil

A

Q.17: A mixture of infusion of gall nuts with ferrous sulphate and certain proportion of hydrochloric acid produces:?

1. Printing Ink
2. Black ink
3. Blue Ink
4. Marking Ink

B

Q.18: Red ink is normally prepared from:?

1. Linseed Oil
2. Brazil Wood
3. Silver Nitrate
4. Oak Plant

B

Q.19: Addition of salts and sugar:?

1. Preserve the food
2. Help to grow micro-organisms
3. Spoil and food
4. Decreases the shelf life of food

A

Q.20: The radiation paned through food to preserve it are comprised of:?

1. Beta rays only
2. Alpha and Beta - rays only
3. Gyma - rays
4. Alpha and Gyma rays

D

Q.21: Soda ash has special role in the manufacture of?

1. Fabrics
2. Textile
3. Soap
4. glass products

C

Q.22: Which one of the following is used domestically as cleansing agent?

1. NaCl
2. NaOH
3. Na₂HCO₃
4. Na₂CO₃

D

Q.23: Sodium silicate and washing soda is added in laundry saps to:?

1. increases the strength
2. enhance the colour
4. Increase the cleansing ability

D

Q.24: Polymerization of phenol and formaldehyde results in the formation of:?

1. Bakelite
2. Exposy resin
3. PVC
4. Polythene

C

Q.25: A thinner drier linseed oil and a resin are the components of:?

1. water paints
2. emulsion
3. Oil paints
4. Distemper

C