Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance. (A) Flint (B) Soda (C) Pyrex (D) Potash

Superior quality laboratory apparatus is made of the __________ glass
having low thermal co-efficient of expansion & high chemical resistance.
(A) Flint
(B) Soda
(C) Pyrex
(D) Potash
by

1 Answer

Answer :

(C) Pyrex
by

Related questions

__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica

Description : __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica

Last Answer : (A) Pyrex

Commonly used glass is known as the __________ glass. (A) Flint (B) Hard (C) Pyrex (D) Soda

Description : Commonly used glass is known as the __________ glass. (A) Flint (B) Hard (C) Pyrex (D) Soda

Last Answer : (D) Soda

__________ glass is used for the manufacture of optical glass. (A) Pyrex (B) Soda (C) Flint (D) Crooke's

Description : __________ glass is used for the manufacture of optical glass. (A) Pyrex (B) Soda (C) Flint (D) Crooke's

Last Answer : (C) Flint

Sudden temperature fluctuation does not affect pyrex glass, because of its (A) Low co-efficient of expansion (B) High co-efficient of expansion (C) High melting point (D) Both (B) and (C)

Description : Sudden temperature fluctuation does not affect pyrex glass, because of its (A) Low co-efficient of expansion (B) High co-efficient of expansion (C) High melting point (D) Both (B) and (C)

Last Answer : (A) Low co-efficient of expansion

Basic oxide is absent in __________ glass. (A) Flint (B) Pyrex (C) Quartz (D) All (A), (B) & (C)

Description : Basic oxide is absent in __________ glass. (A) Flint (B) Pyrex (C) Quartz (D) All (A), (B) & (C)

Last Answer : (C) Quartz

Electric bulbs are made of __________ glass. (A) Jena (B) Flint (C) Crookes (D) Pyrex

Description : Electric bulbs are made of __________ glass. (A) Jena (B) Flint (C) Crookes (D) Pyrex

Last Answer : (B) Flint

The type of high refractive index glass used in optical instruments is __________ glass. (A) Pyrex (B) Flint (C) Crookes (D) None of these

Description : The type of high refractive index glass used in optical instruments is __________ glass. (A) Pyrex (B) Flint (C) Crookes (D) None of these

Last Answer : (B) Flint

Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its (A) High co-efficient of thermal expansion (B) Low thermal conductivity (C) High corrosion resistance (D) All (A), (B) and (C)

Description : Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its (A) High co-efficient of thermal expansion (B) Low thermal conductivity (C) High corrosion resistance (D) All (A), (B) and (C)

Last Answer : (C) High corrosion resistance

Lens is made up of – (1) Pyrex glass (2) Flint glass (3) Ordinary glass (4) Cobalt glass

Description : Lens is made up of – (1) Pyrex glass (2) Flint glass (3) Ordinary glass (4) Cobalt glass

Last Answer : (2) Flint glass Explanation: Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). A concave lens of flint glass is commonly ... doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects).

Lens is made up of (1) Pyrex glass(2) Flint glass (3) Ordinary glass (4) Cobalt glass

Description : Lens is made up of (1) Pyrex glass(2) Flint glass (3) Ordinary glass (4) Cobalt glass

Last Answer : Flint glass

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture. (A) CaO (B) MnO2 (C) ZnO (D) FeS

Description : Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture. (A) CaO (B) MnO2 (C) ZnO (D) FeS

Last Answer : (C) ZnO

The type of glass preferred to make superior laboratory apparatus is

Description : The type of glass preferred to make superior laboratory apparatus is

Last Answer : borosilicate / Pyrex / Jena glass.

Which of the following is an undesirable property of a manometricliquid? (A) Non-sticky & non-corrosive nature (B) High vapour pressure (C) Low viscosity & surface tension (D) Low co-efficient of thermal expansion

Description : Which of the following is an undesirable property of a manometricliquid? (A) Non-sticky & non-corrosive nature (B) High vapour pressure (C) Low viscosity & surface tension (D) Low co-efficient of thermal expansion

Last Answer : (B) High vapour pressure

Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass

Description : Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass

Last Answer : (4) Fibre glass Explanation: Fiberglass is a lightweight, extremely strong, and robust material. Although strength properties are somewhat lower than carbon fiber and it is less stiff, the material ... also very favorable when compared to metals, and it can be easily formed using molding processes.

Which variety of glass is heat resistant? (1) Hard glass (2) Flint glass (3) Pyrex glass (4) Bottle glas

Description : Which variety of glass is heat resistant? (1) Hard glass (2) Flint glass (3) Pyrex glass (4) Bottle glas

Last Answer : (3) Pyrex glass Explanation: Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass.

Which one of the following is used for sun glasses? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass

Description : Which one of the following is used for sun glasses? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass

Last Answer : (3) Crooks glass Explanation: A type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation is used in sunglasses. Sunglasses or sun glasses ... as variously termed spectacles or glasses exist, featuring lenses that are coloured, polarized or darkened.

Which variety of glass is heat resistant? A. Bottle glass B. Flint glass C. Hard glass D. Pyrex glass (Answer)

Description : Which variety of glass is heat resistant? A. Bottle glass B. Flint glass C. Hard glass D. Pyrex glass (Answer)

Last Answer : D. Pyrex glass (Answer)

Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass

Description : Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass

Last Answer : Fibre glass

Heat resistant variety of glass is— (1) Pyrex glass (2) Hard glass (3) Flint glass (4) None of these

Description : Heat resistant variety of glass is— (1) Pyrex glass (2) Hard glass (3) Flint glass (4) None of these

Last Answer :  Flint glass

Which one of the following is used for sun glasses ? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass

Description : Which one of the following is used for sun glasses ? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass

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Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have (A) High electrical insulation properties (B) Sharp melting points (C) Low co-efficient of thermal expansion (D) Compressive strength much greater than their tensile strengths

Description : Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have (A) High electrical insulation properties (B) Sharp melting points (C) Low co-efficient of thermal expansion (D) Compressive strength much greater than their tensile strengths

Last Answer : (B) Sharp melting points

Metallic surveying tapes are made of __________ which has a low co efficient of expansion & enough strength. (A) Invar (B) Hastelloy (C) Duralumin (D) Monel metal

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Last Answer : (A) Invar

The expression, nCv(T2- T1), is for the __________ of an ideal gas. (A) Work done under adiabatic condition (B) Co-efficient of thermal expansion (C) Compressibility (D) None of these

Description : The expression, nCv(T2- T1), is for the __________ of an ideal gas. (A) Work done under adiabatic condition (B) Co-efficient of thermal expansion (C) Compressibility (D) None of these

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Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass. (A) Lead (B) Borosilicate (C) Soda lime (D) Alkali silicate

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Last Answer : (B) Borosilicate

Major component of flint glass is (A) Lead oxide (B) Silica (C) Alumina (D) Soda

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Last Answer : (A) Lead oxide

Which one of the following types of glass can cut off ultraviolet rays? (1) Soda glass (2) Pyrex glass (3) Jena glass (4) Crookes glass

Description : Which one of the following types of glass can cut off ultraviolet rays? (1) Soda glass (2) Pyrex glass (3) Jena glass (4) Crookes glass

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Description : (1/V) (∂V/∂T)Pis the mathematical expression (A) Joule-Thomson co-efficient (B) Specific heat at constant pressure (Cp) (C) co-efficient of thermal expansion (D) Specific heat at constant volume (CV)

Last Answer : (C) co-efficient of thermal expansion

The expression, nRT ln(P1/P2), is for the __________of an ideal gas. (A) Compressibility (B) Work done under adiabatic condition (C) Work done under isothermal condition (D) Co-efficient of thermal expansion

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Last Answer : (D) Thermal co-efficient of expansion

A steel alloy containing 36% nickel is called __________, which has a zero co-efficient of expansion. (A) Austenitic stainless steel (B) Heat resisting steel (C) Invar (D) High speed steel

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The common name for the com-pound having formal NaOH is – (1) Caustic soda (2) Caustic potash (3) Soda ash (4) Sodium hydroxide

Description : The common name for the com-pound having formal NaOH is – (1) Caustic soda (2) Caustic potash (3) Soda ash (4) Sodium hydroxide

Last Answer : (1) Caustic soda Explanation: Sodium hydroxide, also known as lye or caustic soda, has the molecular formula NaOH and is a highly caustic metallic base. It is a white solid available in pellets ... manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner.

The common name for the compound having formal NaOH is (1) Caustic soda (2) Caustic potash (3) Soda ash (4) Sodium hydroxide

Description : The common name for the compound having formal NaOH is (1) Caustic soda (2) Caustic potash (3) Soda ash (4) Sodium hydroxide

Last Answer : Caustic soda

A bearing metal should not have (A) Enough plasticity (B) Low thermal conductivity (C) Low co-efficient of friction (D) High toughness

Description : A bearing metal should not have (A) Enough plasticity (B) Low thermal conductivity (C) Low co-efficient of friction (D) High toughness

Last Answer : (B) Low thermal conductivity

Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel

Description : Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel

Last Answer : (A) Invar

For aluminium, as compared to copper, all the following factors have higher values except (a) specific volume (6) electrical conductivity (c) co-efficient of linear expansion (d) resistance per unit length for same cross-section

Description : For aluminium, as compared to copper, all the following factors have higher values except (a) specific volume (6) electrical conductivity (c) co-efficient of linear expansion (d) resistance per unit length for same cross-section

Last Answer : (6) electrical conductivity

Presence of a non-condensing gas in a condensing vapour (A) Increases the rate of condensation (B) Decreases thermal resistance (C) Is desirable to increase the film co-efficient (D) None of these

Description : Presence of a non-condensing gas in a condensing vapour (A) Increases the rate of condensation (B) Decreases thermal resistance (C) Is desirable to increase the film co-efficient (D) None of these

Last Answer : (D) None of these

Centrifugal pump made of pyrex or glass can't be used to pump (A) Milk and fruit juices (B) Alkaline solutions (C) Dilute H2SO4 at room temperature (D) Brine

Description : Centrifugal pump made of pyrex or glass can't be used to pump (A) Milk and fruit juices (B) Alkaline solutions (C) Dilute H2SO4 at room temperature (D) Brine

Last Answer : (B) Alkaline solutions

Solvay process is used for the manufacture of (A) Caustic soda (B) Soda ash (C) Caustic potash D) Soda lime

Description : Solvay process is used for the manufacture of (A) Caustic soda (B) Soda ash (C) Caustic potash (D) Soda lime

Last Answer : (B) Soda ash

Pick up the correct statement from the following: (A) Plastics have generally low melting point (B) The coefficient of thermal expansion of plastics is about three times than that of steel (C) The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67 (D) All the above

Description : Pick up the correct statement from the following: (A) Plastics have generally low melting point (B) The coefficient of thermal expansion of plastics is about three times than that of steel (C) ... fibre-glass with phenolic resins has absorption coefficient of about 0.67 (D) All the above

Last Answer : Answer: Option D

Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the (A) Mass transfer co-efficient (B) Thermal diffusivity (C) Kinematic viscosity (D) Volumetric diffusivity

Description : Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the (A) Mass transfer co-efficient (B) Thermal diffusivity (C) Kinematic viscosity (D) Volumetric diffusivity

Last Answer : (A) Mass transfer co-efficient

Sodium Carbonate is commonly known as - (1) Baking Soda (2) Washing Soda (3) Caustic Soda (4) Caustic Potash

Description : Sodium Carbonate is commonly known as - (1) Baking Soda (2) Washing Soda (3) Caustic Soda (4) Caustic Potash

Last Answer : (2) Washing Soda Explanation: Sodium carbonate (Na2CO3) is also known as washing soda, soda ash and soda crystals. It is a salt of carbonic acid, a chemical that produces a wide range of salts collectively known as carbonates. It can be used to remove stubborn stains from laundry.

By-product obtained by soap industry is – (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Description : By-product obtained by soap industry is – (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Last Answer : (2) Glycerol Explanation: Glycerol forms the backbone of triglyeerides, and is chiefly produced by saponification of fats as a byproduct of soapmaking. It is also a byproduct of the production of ... This form of crude glycerin is often dark in appearance with a thick, syrup-like consistency.

Differentiate between the following pairs : a). Lava and Magma b). Ultraviolet and infrared c). Fault and Fold d). Caustic Soda and Caustic Potash e). S.E.M. and T.E.M.

Description : Differentiate between the following pairs : a). Lava and Magma b). Ultraviolet and infrared c). Fault and Fold d). Caustic Soda and Caustic Potash e). S.E.M. and T.E.M.

Last Answer : a). Lava and Magma Molten rock, when it is still beneath the earth's surface is Magma, and "lava" after it has erupted. b). Ultraviolet and infrared Ultraviolet : Electromagnetic radiation ... allowing the surface stucture of a specimen to be examined. T.E.M.: Transmission electronic microscope.

The law of multiple proportions is illustrated by the two compounds [NCERT 1972] (A) Sodium chloride and sodium bromide (B) Ordinary water and heavy water (C) Caustic soda and caustic potash (D) Sulphur dioxide and sulphur trioxide

Description : The law of multiple proportions is illustrated by the two compounds [NCERT 1972] (A) Sodium chloride and sodium bromide (B) Ordinary water and heavy water (C) Caustic soda and caustic potash (D) Sulphur dioxide and sulphur trioxide

Last Answer : (D) Sulphur dioxide and sulphur trioxide

Sodium Carbonate is commonly known as (1) Baking Soda (2) Washing Soda (3) Caustic Soda (4) Caustic Potash

Description : Sodium Carbonate is commonly known as (1) Baking Soda (2) Washing Soda (3) Caustic Soda (4) Caustic Potash

Last Answer : Washing Soda

By-product obtained by soapindustry is (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Description : By-product obtained by soapindustry is (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Last Answer : Glycerol

. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2 .°C-1 . The rate of heat loss from the outer surface in W.m-2 is (A) 165.4 (B) 167.5 (C) 172.5 (D) 175

Description : . The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C ... from the outer surface in W.m-2 is (A) 165.4 (B) 167.5 (C) 172.5 (D) 175

Last Answer : (A) 165.4

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is ‘3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade?(A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25

Description : Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l'. If the wall temperature ... wall temperature in degree centigrade? (A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25

Last Answer : (C) 81.25

The main component of Pyrex glass is (A) Zinc (B) Lead (C) Boron (D) Selenium

Description : The main component of Pyrex glass is (A) Zinc (B) Lead (C) Boron (D) Selenium

Last Answer : (B) Lead