Questions
Copper and aluminium can be drawn into wires because
- they are malleable
- they are ductile
- they are sonorous
- they have lustre
- they are good conductors
Which of the following non-metals occurs in liquid state?
- Bromine
- Chlorine
- Sodium
- Aluminium
- Mercury
Why is mercury used as a thermometric liquid?
- It is a liquid metal.
- It expands on heating.
- It does not stick to the glass wall.
- All of the above
- None of these
Which of the following metals is used in fireworks?
- Sodium
- Carbon
- Zinc
- Copper
- Magnesium
Which of the following is used in photography?
- Silver iodide
- Tincture of iodine
- Magnesium
- Sodium
- Carbon
The purity of 22 carat gold is
- 99.7%
- 91.67%
- 75%
- 90%
- 96%
Which of the following alloys is used in making bodies of aircraft?
- Duralumin
- Bronze
- Steel
- Brass
- Stainless steel
Which of the following is/are the main constituent used in the manufacture of cement?
- Gypsum
- Sand
- Plaster of Paris
- Steel rods
- Coal tar
Which of the following is used for making moulds and statues?
- Plaster of Paris
- Gypsum
- Calcium carbonate
- Sodium chloride
- Washing soda
Which of the following is the chemical formula of bleaching powder?
- NaHCO3
- Na2CO3.10H2O
- CaCO3
- Ca(OCl)Cl
- HCl
The smallest hydrocarbon is
- methane
- ethane
- propane
- butane
- ethene
The main constituents of LPG gas are
- butane and propane
- methane and carbon dioxide
- water vapour and carbon monoxide
- All of the above
- None of these
Which of the following carbohydrates is present in rice?
- Glucose
- Protein
- Sucrose
- Starch
- Cellulose
Which of the following fungicides is used to prevent fungus attack in potato?
- Bordeaux
- DDT
- Gammaxene
- Malathion
- Disyston
Which of the following fertilisers is necessary for growth of roots and formation of seeds?
- Nitrgenous fertiliser
- Phosphatic fertiliser
- Potassium fertiliser
- Aluminium fertiliser
- Sodium fertiliser
The process of heating oils or fats with sodium hydroxide is called
- saponification
- esterification
- polymerisation
- annealing
- polarisation
Which of the following is the process of linking together small polymers to form a large polymer?
- Annealing
- Pasteurisation
- Combination
- Saponification
- Polymerisation
Which of the following metallic oxides is used to prepare blue glass?
- Selenium oxide
- Cobalt oxide
- Magnesium dioxide
- Iron (III) oxide
- None of these
A mixture of cement, sand and water is called
- mortar
- soda lime
- reinforced concrete and cement (RCC)
- concrete
- soda ash
A homogeneous mixture of a metal with a non-metal is called a/an
- metalloid
- alkali
- alloy
- compound
- polymer
The process of cooling glass articles slowly to prevent brittleness is called
- cladding
- annealing
- blowing
- sublimation
- neutralisation
Which of the following is a thermosetting plastic?
- Polystyrene
- Polyvinyl chloride
- Acrylic
- Teflon
- Bakelite
The main constituents of carbohydrate are
- carbon, hydrogen and nitrogen
- hydrogen and oxygen
- chlorine, hydrogen and oxygen
- carbon, hydrogen and oxygen
- carbon, hydrogen and sulphur
Galvanised iron is coated with which of the following metals?
- Zinc
- Gold
- Tin
- Silver
- Copper
Soaps form scum with
- soft water
- hard water
- distilled water
- mineral water
- None of these
Which of the following is known as the building block of life?
- Glucose
- Fat
- Carbohydrate
- Protein
- Vitamin
Which of the following is the most abundant metal found in the Earth's crust?
- Calcium
- Iron
- Potassium
- Aluminium
- Sodium
Which of the following mixtures is used by deep divers for respiration?
- Oxygen and nitrogen
- Oxygen and helium
- Oxygen and carbon
- Oxygen and acetylene
- Oxygen and argon
Which of the following plastics is used for covering electric wires?
- Polystyrene
- Teflon
- Polythene
- Polyvinyl chloride
- Bakelite
The hardest known naturally occurring substance is
- diamond
- graphite
- lead
- enamel
- iron