Paper is manufactured by
1.Wood and resin
2.Wood, sodium and bleaching powder
3.Wood, calcium, hydrogen sulphite and resin
4.Wood and bleaching powder
Soap is a mixture of sodium or potassium salts of
1.dicarboxylic acids
2.monocarboxylic acids
3.glycerol
4.tricarboxylic acids
Deep blue colour is imparted to glass by the presence of
1.cupric oxide
2.nickel oxide
3.cobalt oxide
4.iron oxide
Detergents used for cleaning clothes and utensils contain?
1.bicarbonates
2.bismuthates
3.sulphonates
4.nitrates
Epoxy resins are used as
1.detergents
2.insecticides
3.adhesives
4.moth repellents
Glass is made of the mixture of
1.quartz and mica
2.sand and silicates
3. salt and quartz
4.sand and salt
Gypsum is added to cement clinker to.
1.increase the tensile strength of cement
2.decrease the rate of setting of cement
3. facilitate the formation of colloidal gel
4.bind the particles of calcium silicate
How does common salt help in separating soap from the solution after saponification?
1.By decreasing density of Soap
2.By decreasing solubility of Soap
3.By increasing density of Soap
4.By increasing solubility of Soap
In vulcanisation, natural rubber is heated with
1.Carbon
2.Silicon
3.Sulphur
4.Phosphorous
Which is/are the important raw material(s) required in cement industry?
1.Gypsum and Clay
2.Clay
3.Limestone and Clay
4.Limestone
Optic fibres are mainly used for which of the following?
1.Musical instruments
2.Food industry
3.Weaving
4.Communication
Rayon is chemically
1.cellulose
2.pectin
3.glucose
4. amylase
The major ingredient of leather is
1.collagen
2.carbohydrate
3.polymer
4.nucleic acid
The type of glass used in making lenses and prisms is
1.jena glass
2.soft glass
3.pyrex glass
4.flint glass
The vast resources of unutilised natural gas can be used in the production of
1.graphite
2.Synthetic petroleum
3.fertilisers
4.carbide
What are the soaps?
1.Salts of silicates
2.Mixture of glycerol and alcohols
3.Sodium or potassium salts of heavier fatty acids
4.Esters of heavy fatty acids
Which of the following is a protein?
1.Natural rubber
2.Starch
3.Cellulose
4.None of these
Which of the following is used for removing air bubbles from glass during its manufacture?
1.Feldspar
2.Soda ash
3. Potassium carbonate
4.Arsenous oxide
Which one of the following is the petroleum wax?
1. Paraffin wax
2. Jonoba wax
3.Carnauba wax
4.Bees wax
Which type of fire extinguisher is used for petroleum fire?
1. Powder type
2.Liquid type
3.Soda acid type
4.Foam type
Which type of fire extinguisher is used for petroleum fire?
1.Powder type
2.Liquid type
3.Soda acid type
4.Foam type
Wood is the main raw material for the manufacture of
1.paint
2.ink paper
3.gun powder
4.None