Which of the following is a supercooled liquid ? (1) Ice Cream (2) Teflon (3) Glass (4) Mercury

Which of the following is a supercooled liquid ? (1) Ice Cream (2) Teflon (3) Glass (4) Mercury
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Glass
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Which of the following is a supercooled liquid? (1) Ice Cream (2) Teflon (3) Glass (4) Mercury

Description : Which of the following is a supercooled liquid? (1) Ice Cream (2) Teflon (3) Glass (4) Mercury

Last Answer : (3) Glass Explanation: Most of us think as glass as a solid material, but it is actually a super cooled liquid. Molecular units have a disordered arrangement yet still have sufficient ... Middle East, approximately during the third millennium BC. Early uses were primarily for vessels or decoration.

Glass is a – (1) superheated solid (2) supercooled liquid (3) supercooled gas (4) superheated liquid

Description : Glass is a – (1) superheated solid (2) supercooled liquid (3) supercooled gas (4) superheated liquid

Last Answer : (2) supercooled liquid Explanation: Glass is an amorphous (noncrystalline) solid material. Glasses are typically brittle and optically transparent. The standard definition of a glass (or vitreous solid) is ... structure of a glass exists in a meta-stable state with respect to its crystalline form.

Glass is a – (1) pure solid (2) supercooled liquid (3) gel (4) polymer

Description : Glass is a – (1) pure solid (2) supercooled liquid (3) gel (4) polymer

Last Answer : (2) supercooled liquid Explanation: Glass is an amorphous (noncrystalline) solid material. Glasses are typically brittle and optically transparent. The standard definition of a glass (or vitreous solid ... is often used to describe any amorphous solid that exhibits a glass transition temperature Tg.

Glass is a (1) superheated solid (2) supercooled liquid (3) supercooled gas (4) superheated liquid

Description : Glass is a (1) superheated solid (2) supercooled liquid (3) supercooled gas (4) superheated liquid

Last Answer :  supercooled liquid

Ordinary glass is not a/an (A) Amorphous isotropic material (B) Supercooled liquid (C) Material with sharp definite melting point (D) Electrical insulator

Description : Ordinary glass is not a/an (A) Amorphous isotropic material (B) Supercooled liquid (C) Material with sharp definite melting point (D) Electrical insulator

Last Answer : (C) Material with sharp definite melting point

Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Description : Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Last Answer : (3) Glass Explanation: Glass is considered to be a supercooled liquid due to its lack of a first-order phase transition where certain thermodynamic variables such as volume, entropy ... where the intensive thermodynamic variables such as the thermal expansivity and heat capacity are discontinuous.

Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Description : Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Last Answer : Glass

Two aircrafts, one with a sharp wing profile (S) and the other with a thick profile (T), are flying through the same cloud with the same true airspeed. The cloud consists of small supercooled droplets. Which of the following statements is most correct concerning ice accretion? a. Aircraft T experiences more icing than S b. Aircraft S and T experience the same amount of icing c. Neither of the aircrafts accumulate ice due to the small size of droplets d. Aircraft S experiences more icing than T

Description : Two aircrafts, one with a sharp wing profile (S) and the other with a thick profile (T), are flying  through the same cloud with the same true airspeed. The cloud consists of small  ... aircrafts accumulate ice due to the small size of droplets  d. Aircraft S experiences more icing than T

Last Answer : d. Aircraft S experiences more icing than T

Two aircrafts, one with a sharp wing profile (S) and the other with a thick profile (T), are flying through the same cloud with the same true airspeed. The cloud consists of small supercooled droplets. Which of the following statements is most correct concerning ice accretion? a. Aircraft T experiences more icing than S b. Aircraft S and T experience the same amount of icing c. Neither of the aircrafts accumulate ice due to the small size of droplets d. Aircraft S experiences more icing than T

Description : Two aircrafts, one with a sharp wing profile (S) and the other with a thick profile (T), are flying through the same cloud with the same true airspeed. The cloud consists of small ... aircrafts accumulate ice due to the small size of droplets d. Aircraft S experiences more icing than T

Last Answer : d. Aircraft S experiences more icing than T

Give scientific reasons (in not more than four lines each) for the following: (i) Meat takes longer to cook on the mountains (ii) Water remains cool in earthen pitchers (iii) Ice and salt mixture is used as a freezing agent by manual ice cream makers. (iv) It is not advisable to sleep under trees during the night. (v) Greenhouse operators paint their glass roofs white in summer.

Description : Give scientific reasons (in not more than four lines each) for the following: (i) Meat takes longer to cook on the mountains (ii) Water remains cool in earthen pitchers (iii) Ice and salt ... to sleep under trees during the night. (v) Greenhouse operators paint their glass roofs white in summer.

Last Answer : (i) Meat takes longer to cook on the mountains: The atmospheric pressure decreases as the altitude increases. The boiling point of water is 100 c at standard atmospheric pressure. At the mountains this ... of light to a maximum. And therefore white colour is painted on the roofs in the summer.

The mercury does not wet the glass. This is due to the property of the liquid known as (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Description : The mercury does not wet the glass. This is due to the property of the liquid known as (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Last Answer : Answer: Option D

Mercury does not wet glass. This is due to property of liquid known as (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Description : Mercury does not wet glass. This is due to property of liquid known as (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Last Answer : Answer: Option C

The 'dielectric constant' is a numerical value indicating the effectiveness of a dielectric material in comparison to that of a standard, which is _______________. A. paper or cloth B. glass or mica C. plastic or Teflon D. dry air or a vacuum

Description : The 'dielectric constant' is a numerical value indicating the effectiveness of a dielectric material in comparison to that of a standard, which is _______________. A. paper or cloth B. glass or mica C. plastic or Teflon D. dry air or a vacuum

Last Answer : Answer: D

H2SO4 (< 50% concentration) is corrosive to (A) Aluminium, mild steel, stainless steel, concrete & tin (B) Copper, cast iron & high silicon iron (14% Si) (C) Rubber (butyl and hard), silicone rubber & Teflon (D) Glass, graphite, porcelain & stoneware

Description : H2SO4 (< 50% concentration) is corrosive to (A) Aluminium, mild steel, stainless steel, concrete & tin (B) Copper, cast iron & high silicon iron (14% Si) (C) Rubber (butyl and hard), silicone rubber & Teflon (D) Glass, graphite, porcelain & stoneware

Last Answer : (A) Aluminium, mild steel, stainless steel, concrete & tin

100% H2SO4 at 30°C can't be stored in a vessel made/lined with (A) Cast iron and high silicon iron (B) Mild steel and stainless steel (C) Aluminium, tin and rubber (D) Teflon, glass and porcelain

Description : 100% H2SO4 at 30°C can't be stored in a vessel made/lined with (A) Cast iron and high silicon iron (B) Mild steel and stainless steel (C) Aluminium, tin and rubber (D) Teflon, glass and porcelain

Last Answer : (C) Aluminium, tin and rubber

The chlorinator used in the manufacture of DDT is made of(A) Glass(B) Glass lined steel(C) Teflon(D) Bakelite

Description : The chlorinator used in the manufacture of DDT is made of (A) Glass (B) Glass lined steel (C) Teflon (D) Bakelite

Last Answer : (B) Glass lined steel

Which one of the following substances does not have a melting point? (1) Bromine (2) Sodium chloride (3) Mercury (4) Glass

Description : Which one of the following substances does not have a melting point? (1) Bromine (2) Sodium chloride (3) Mercury (4) Glass

Last Answer : (3) Mercury Explanation: The boiling point is the temperature at which a material changes from a liquid to a gas (boils) while the melting point is the temperature at which a material changes from a solid to a liquid (melts).

What is the purpose of adding gelatin to ice cream ?

Description : What is the purpose of adding gelatin to ice cream ?

Last Answer : Ans. Ice cream is a colloid. Gelatin imparts stability to it because gelatin is a protective colloid. 

Liquid metal is - (1) Mercury (2) Sodium (3) Antimony (4) None

Description : Liquid metal is - (1) Mercury (2) Sodium (3) Antimony (4) None

Last Answer : (1) Mercury Explanation: Liquid metal consists of galliumcontaining alloys with very low melting points which are liquid at room temperature. The standard metal formerly is mercury.

Which among the following is liquid non-metal? (1) Mercury (2) Bromine (3) Water (4) Alcohol

Description : Which among the following is liquid non-metal? (1) Mercury (2) Bromine (3) Water (4) Alcohol

Last Answer : (2) Bromine Explanation: Bromine, a non-metal of halogen group, is found in liquid state. Mercury is a metal. Water and alcohol are compounds

Mercury is a – (1) solid metal (2) liquid metal (3) solid non-metal (4) liquid non-metal

Description : Mercury is a – (1) solid metal (2) liquid metal (3) solid non-metal (4) liquid non-metal

Last Answer : (2) liquid metal Explanation: A heavy, silvery d-block element, Mercury is the only metal that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these ... of 356.73 °C, mercury has one of the narrowest ranges of its liquid state of any metal.

At room temperature, the metal that remains liquid is: (1) Mercury (2) Platinum (3) Lead (4) Zinc

Description : At room temperature, the metal that remains liquid is: (1) Mercury (2) Platinum (3) Lead (4) Zinc

Last Answer : (1) Mercury Explanation: Mercury is the only metal that is a liquid at normal temperatures and pressure. At room temperatureand pressure, mercury neither readily share valence electrons with other atoms nor ... Infact, mercury is the only metal that doesn't form diatomic molecules in the has phase.

Which one of the following elements exists in liquid state at room temperature? (1) Mercury (2) Lead (3) Sodium (4) Calcium

Description : Which one of the following elements exists in liquid state at room temperature? (1) Mercury (2) Lead (3) Sodium (4) Calcium

Last Answer : (1) Mercury Explanation: Mercury is a dense, silvery dblock element. It is the only metal that is liquid at standard conditions for temperature and pressure.

Which among the following is liquid non-metal ? (1) Mercury (2) Bromine (3) Water (4) Alcohol

Description : Which among the following is liquid non-metal ? (1) Mercury (2) Bromine (3) Water (4) Alcohol

Last Answer : Bromine

Mercury is a : (1) solid metal (2) liquid metal (3) solid non-metal (4) liquid non-metal

Description : Mercury is a : (1) solid metal (2) liquid metal (3) solid non-metal (4) liquid non-metal

Last Answer : liquid metal

Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt

Description : Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt

Last Answer : ANSWER: X -- ICE

Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt

Description : Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt

Last Answer : ANSWER: X -- ICE

The so-called fourth state of matter refers to (a) Mercury (b) LPG (c) Dry ice (d) Plasma

Description : The so-called fourth state of matter refers to (a) Mercury (b) LPG (c) Dry ice (d) Plasma

Last Answer : Ans:(d)

What is Teflon Monoma ?

Description : What is Teflon Monoma ?

Last Answer : Teflon monomer is Tretafluoro Ethylene ( F2C = CF2) . It is also used in making frying pans.

Which of the following is used as no coating for Cooking utensils? (1) Perspex (2) Styrofoam (3) Polystyrene (4) (4)Teflon

Description : Which of the following is used as no coating for Cooking utensils? (1) Perspex (2) Styrofoam (3) Polystyrene (4) (4)Teflon

Last Answer : (4)Teflon Explanation: The non-stick coating used mainly for coating cooking utensils is made using PTFE (polytetrafluoroethylene) that is also known by the name Teflon. Teflon is an inert polymer ... containing substances wet it and it has one of the lowest coefficients of friction of any solid.

Which of the following is not a natural polymer? (1) Wool (2) Silk (3) Cotton (4) Teflon

Description : Which of the following is not a natural polymer? (1) Wool (2) Silk (3) Cotton (4) Teflon

Last Answer : (4) Teflon Explanation: Natural polymers occur in nature and can be extracted. They are often waterbased. Examples of naturally occurring polymers are silk, wool, DNA, cellulose, cotton and proteins.

Non-stick kitchenwares are coated with (1) PVC (2) Graphite (3) Teflon (4) Silicon

Description : Non-stick kitchenwares are coated with (1) PVC (2) Graphite (3) Teflon (4) Silicon

Last Answer : (3) Teflon Explanation: Polytetrafluoroethylene (FYIFE) is a synthetic fluoropolymer of tetrafluoroethylene that finds numerous applications. The best known brand name of FIFE is Teflon. PTFE is used as ... for pans and other cookware as it is hydrophobic and possesses fairly high heat resistance.

The name of plastic polymer from which combs, toys, bowls etc., can be made, is (1) Polyurethane (2) Polystyrene (3) Metallic polysulphides (4) Teflon

Description : The name of plastic polymer from which combs, toys, bowls etc., can be made, is (1) Polyurethane (2) Polystyrene (3) Metallic polysulphides (4) Teflon

Last Answer : (2) Polystyrene Explanation: Polystyrene is an synthetic aromatic polymer made from the monomer styrene, a liquid petrochemical. It is one of the most widely used plastics. Uses include protective ... containers (such as "clamshells"), lids, bottles, trays, tumblers, and disposable cutlery.

Which one of the following is used to make Teflon? (a) Fluoroethene (b) 1,1,4,4-tetrafluorobutadiene (c) 1,2-difluoroethene (d) Tetrafluoroethylene

Description : Which one of the following is used to make Teflon? (a) Fluoroethene (b) 1,1,4,4-tetrafluorobutadiene (c) 1,2-difluoroethene (d) Tetrafluoroethylene

Last Answer : Tetrafluoroethylene

Which of the following are condensation polymers? I. Polypropylene II. Teflon III. Nylon (a) Only I (b) Only II (c) Only III (d) Both II and III

Description : Which of the following are condensation polymers? I. Polypropylene II. Teflon III. Nylon (a) Only I (b) Only II (c) Only III (d) Both II and III

Last Answer : Only III

Which of the following are addition polymers? I. Polypropylene II. Teflon III. Nylon (a) Only I (b) Only II (c) Only III (d) both I and II

Description : Which of the following are addition polymers? I. Polypropylene II. Teflon III. Nylon (a) Only I (b) Only II (c) Only III (d) both I and II

Last Answer : both I and II

Ethylene glycol reacts with dimethyl terephthalate to form (a) Nylon-6,6 (b) Teflon (c) Dacron (d) Orlon

Description : Ethylene glycol reacts with dimethyl terephthalate to form (a) Nylon-6,6 (b) Teflon (c) Dacron (d) Orlon

Last Answer : Dacron

Which of the following polymers contain nitrogen (a) PVC (b) Teflon (c) Nylon (d) Terylene

Description : Which of the following polymers contain nitrogen (a) PVC (b) Teflon (c) Nylon (d) Terylene

Last Answer : Nylon

Which of the following is an example of a condensation polymer? (a) Nylon-6,6 (b) Teflon (c) Polypropylene (d) Orlon

Description : Which of the following is an example of a condensation polymer? (a) Nylon-6,6 (b) Teflon (c) Polypropylene (d) Orlon

Last Answer : Nylon-6,6

Which of the following is a thermosetting polymer? (a) Bakelite (b) Nylon-6,6 (c) Polyethylene (d) Teflon

Description : Which of the following is a thermosetting polymer? (a) Bakelite (b) Nylon-6,6 (c) Polyethylene (d) Teflon

Last Answer : Bakelite

Teflon is prepared by the polymerization of (a) Butadiene (b) Vinyl cyanide (c) Vinyl chloride (d) Tetrafluoroethylene

Description : Teflon is prepared by the polymerization of (a) Butadiene (b) Vinyl cyanide (c) Vinyl chloride (d) Tetrafluoroethylene

Last Answer : Tetrafluoroethylene

Which of the following is not a polymer? w) rayon x) Teflon y) rubber z) penicillin

Description : Which of the following is not a polymer? w) rayon x) Teflon y) rubber z) penicillin

Last Answer : ANSWER: Z -- PENICILLIN

Teflon is produced by polymerizing ethylene which hydrogen substituted with one of the following elements: w) teflinium x) tin y) fluorine z) carbon

Description : Teflon is produced by polymerizing ethylene which hydrogen substituted with one of the following elements: w) teflinium x) tin y) fluorine z) carbon

Last Answer : ANSWER: Y -- FLUORINE

Which of the following is used as non-stick coating for cooking utensils? (1) Perspex (2)Styrofoam (3) Polystyrene (4)Teflon

Description : Which of the following is used as non-stick coating for cooking utensils? (1) Perspex (2)Styrofoam (3) Polystyrene (4)Teflon

Last Answer : Teflon

The name of plastic polymer from which combs, toys, bowls etc., can be made, is (1) Polyurethane (2) Polystyrene (3) Metallic polysulphides (4) Teflon

Description : The name of plastic polymer from which combs, toys, bowls etc., can be made, is (1) Polyurethane (2) Polystyrene (3) Metallic polysulphides (4) Teflon

Last Answer : Polystyrene

Non-stick kitchenwares are coated with (1) PVC (2) Graphite (3) Teflon (4) Silicon

Description : Non-stick kitchenwares are coated with (1) PVC (2) Graphite (3) Teflon (4) Silicon

Last Answer : Teflon

In which of the following substances all carbon atoms are quaternary in nature ? (1) Graphite (2) Diamond (3) Teflon (4) Napthalene

Description : In which of the following substances all carbon atoms are quaternary in nature ? (1) Graphite (2) Diamond (3) Teflon (4) Napthalene

Last Answer : Diamond

If to torricelli had drilled a little hole at the top of the glass tube holding his mercury column what would have happened to his barometer?

Description : If to torricelli had drilled a little hole at the top of the glass tube holding his mercury column what would have happened to his barometer?

Last Answer : He would not have had a barometer. He would have had a glass tube stuck into a bowl of Mercury, with nothing in it. Because once the hole was made the vacuum would be gone and the Mercury would fall back down to the bowl.It takes the vacuum in the tube to create a barometer.

Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Description : Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Last Answer : ANSWER: A

Optical Fiber Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Description : Optical Fiber Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Last Answer : ANSWER: A