Description : Most substances are more dense in their solid form than in their liquid or gaseous form. What makes the solid phase more dense?
Last Answer : Solid has more energy
Description : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed . The total number of gaseous mole
Last Answer : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed ... - A. 5.1 B. 3.9 C. 10.5 D. 8.5
Description : Ketones react with Grignard reagents to form an addition product which on hydrolysis gives a (a) Primary alcohol (b) Tertiary alcohol (c) Secondary alcohol (d) Ketal
Last Answer : Tertiary alcohol
Description : Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 2A + B → A2 B. Which of the following statements concerning this reaction are incorrect? -Chemistry 9th
Last Answer : (c) (i), (iii), (iv) Consider the example of H2O
Description : Why does helium dose not react with other substances. dose this mean that helium has no chemical properties?
Last Answer : No, helium is unreactive and this is a chemical property !
Description : Which one of the following pair of waste substances is removed from blood in ornithine cycle `:`
Last Answer : Which one of the following pair of waste substances is removed from blood in ornithine cycle `:` A. ` ... CO_(2)` and ammonia D. Urea and sodium salt
Description : Which one of the following pair of waste substances is removed from blood in omithine cycle
Last Answer : Which one of the following pair of waste substances is removed from blood in omithine cycle A. `CO_(2) ... CO_(2)` and ammonia D. Urea and sodium sail
Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance
Last Answer : A Different structural forms of an element
Description : What is the gaseous product formed from the reaction of calcium carbide and water?
Last Answer : ANSWER: ACETYLENE (or ETHYNE OR C2H2)
Description : Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) which upon treatment with HCN gives compound(
Last Answer : Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) ... (P) and (Q), respectively, are: B. C. D.
Description : How does Wilbur react to the “bad news†the sheep gives him?
Last Answer : He remembers that flies are pests and everyone is trying to get rid of them one way or another.
Description : The gaseous product released during the manufacture of soda glass is
Last Answer : carbon dioxide.
Description : Combustion of pulverised fuel (A) Requires larger combustion chamber than rich gaseous fuel (B) In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel (C) Suppresses the discharge of fine dust and grit into atmosphere (D) All (A), (B) and (C)
Last Answer : (A) Requires larger combustion chamber than rich gaseous fuel
Description : A gaseous organic compound that is best known for its use in preservative solutions has the chemical formula HCHO (read: H - C - H CHEM-92; Short Answer: Give me the name and atomic number ... element is a clear, odorless gas. This element is one of the essential ingredients in the burning process.
Last Answer : ANSWER: OXYGEN ATOMIC NUMBER = 8
Description : "Under the same conditions of temperature and pressure, the volumes of reacting gases and of their gaseous products are expressed in ratios of small whole numbers." This law is attributed to: w) Dalton x) Gay-Lussac y) Ramsay z) Avogadro
Last Answer : ANSWER: X -- GAY-LUSSAC
Description : "The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the (A) Lewis- ... (B) Statement of Van't Hoff Equation (C) Le-Chatelier's principle (D) None of these
Last Answer : (D) None of these
Description : Name the gelatin-like substance which is prepared fro various species of red algae growing in Asiatic waters. The prepared product appears in the form of cakes, coarse granules, long ... or in combination with various nutritive substances, as a medium for culturing bacteria and various fungi
Last Answer : ANSWER: Agar-agar or just Agar
Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : What is the objective of the 'Kyoto Protocol'? (1) To abolish child labour (2) To eliminate nuclear weapons (3) To increase ground water levels (4) To reduce greenhouse gases
Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic. a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : Cement is usually a mixture of – (1) Calcium silicate and calcium alurninate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide
Description : Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if ... unstable or has the tendency to react with other components associated with it, at the boiling temperature
Last Answer : (A) Azeotropic mixture is to be separated and the final product is miscible with water
Description : How do you react when you see a new flavor, type or upgrade to an existing product at the store?
Last Answer : buy it!...if it’s Orbit gum. i buy every new flavor that comes out. not sure why, but it’s like a habit i can’t break.
Description : `K_(2)Cr_(2)O_(7)` react with hydrazins to form product. The oxidation state of Cr in the product will be :-
Last Answer : `K_(2)Cr_(2)O_(7)` react with hydrazins to form product. The oxidation state of Cr in the product will be :- A. `+4` B. `+3` C. `+5` D. `+2`
Description : The reaction in which product mole- cules react and give back the original reactants is called?
Last Answer : Backward reaction
Description : What is the common names for solid liquid and gaseous states of water?
Last Answer : solid = iceliquid = watergaseous = water vapour
Description : What is the resulting concentration (in molL) of aqueous hydrochloric acid if 500 mL of its gaseous form at 300 K and 100 kPa will be dissolved in 100 mL pure water Use 8.314 kPaL(Kmol)?
Last Answer : Feel Free to Answer
Description : The chemical used in enabalining biological materials is – (1) formaldehyde in water (2) formaldehyde in methanol (3) ethylene glycol (4) gaseous formaldehyde
Last Answer : (1) formaldehyde in water Explanation: Embalming fluids use formaldehyde as a preservative. Formaldehyde is the simplest aldehyde with the chemical formula HCHO. Formalin is a solution of formaldehyde ... based embalming fluids are much kinder to the environment than those used in previous years.
Description : Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as: (1) Mixing ratio (2) Relative humidity (3) Absolute humidity (4) Specific humidity
Last Answer : (3) Absolute humidity Explanation: The relative humidity of air at a given temperature is the ratio of mass of water vapour actually present in a certain volume of air to the mass of water vapour required to saturate the same volume of air at the same temperature, multiplied by 100.
Description : Absorption with chemical reaction' is involved in the removal of (A) Carbon dioxide from gaseous stream using alkaline solution (B) Benzol from coke oven gas using solar oil/wash oil (C) Ammonia ... gas using refrigerated water (D) Tar from coke oven gas in primary gas coolers using chilled water
Last Answer : (A) Carbon dioxide from gaseous stream using alkaline solution
Description : Death of protoplasm is a pre-requisite for a vital function like (a) transport of sap (b) transport of food (c) absorption of water (d) gaseous exchange.
Last Answer : (a) transport of sap
Description : Death of protoplasm is a pre-requisite for a vital function like (a) transport of sap (b) transport of food (c) absorption of water (d) gaseous exchange
Description : Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3 )? (A) Producer gas (B) Carburetted water gas (C) Natural gas (D) Liquefied petroleum gas
Last Answer : (D) Liquefied petroleum gas
Description : In the context of the chemical process industries, the term BOD is normally associated with the (A) Characterisation of solid wastes (B) Organic concentration in gaseous effluents (C) Characterisation of liquid effluents (D) Characterisation of boiler feed water
Last Answer : (C) Characterisation of liquid effluents
Description : Reverse osmosis is normally used for the (A) Separation of isotopes of uranium from gaseous uranium hexafluoride (B) Separation of helium from natural gas (C) Desalination of brackish water to produce potable (drinking) water (D) Purification of oxygen
Last Answer : (C) Desalination of brackish water to produce potable (drinking) water
Description : Pick out the wrong statement. (A) Strongly caking coal should not be used in the Lurgi gasifier (B) Acetylene gas cannot be used for illumination purpose (C) Water gas is called blue gas ... is burnt (D) Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels
Last Answer : (B) Acetylene gas cannot be used for illumination purpose
Description : The gaseous water density of the atmosphere is more commonly known as what?
Last Answer : ANSWER: HUMIDITY
Description : The chemical used in embalming biological materials is (1) formaldehyde in water (2) formaldehyde in methanol (3) ethylene glycol (4) gaseous formaldehyde
Last Answer : formaldehyde in water
Last Answer : Absolute humidity
Description : The pair of the equimolar compound that would be give a single condensation product when treated with an alkali is
Last Answer : The pair of the equimolar compound that would be give a single condensation product when treated with an alkali is A ... ` B. C. D. `CH_(3)CHO+HCHO`
Description : Predict the product from claisen condensation of the following pair of esters. `Ph-CH_(2)-underset(O)underset(||)(C)-OCH_(3)+Ph-underset(O)underset(||
Last Answer : Predict the product from claisen condensation of the following pair of esters. `Ph-CH_(2)-underset(O)underset( ... )(C)-OCH_(3)overset(EtO^(Theta))to`
Description : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of atom in X and Y c=total number of lone pair
Last Answer : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of ... lone pair in X then calculate a+b+c = ?
Description : How do you express the sum of each pair of numbers as a product of the greatest common factor of the numbers and another number?
Last Answer : Pick a pair of numbers.Let's try 30 and 42.Their GCF is 6.6 x 5 and 6 x 7By the distributive property, that can be written as 6(5 +7)