When fractional distillation can be used?

Q: In very cold countries alcohol is used as a thermometric liquid because    A) alcohol is a poor…

A: The freezing point of an alcohol is as low as  -117°C. Therefore it won't freeze even in very cold…

Q: How does melting ice change the temperature of the surrounding air?

A: For the ice to melt, it needs to gain energy from the surrounding.

Q: Solution X has a pH of 9.5, and

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Q: Which is not an advantage of "Extractive distillation" over "Azeotropic distillation"?

A: In this question we have to compare Extractive Distillation with Azeotropic Distillation. Please…

Q: Use Avogadro’s number to convert between number of molecules and number of moles.

A: Avogadro’s Number: The term Avogadro’s number is represented as the number of elementary particles…

Q: What is a compound? Give three exampes?

A: Step 1A compound is a substance made up of two or more element.

Q: What are characteristics of detergent solutions?

A: Detergents, like soaps, work because they are amphiphilic: partly hydrophilic (polar) and partly…

Q: In analysis of an aluminum-zinc alloy, the mass of gelatin capsule is 0.1192g, mass of alloy +…

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Q: What is the label of rusting of an iron bridge?

A: Changes can be classified as physical changes and chemical changes. A physical change is the change…

Q: pH value at half of end point of the titration of ( 10ml of 0.1N HAc X 0.1N NaOH ) is 4.74 if (…

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Q: Which of the following is a pure substance? O 1. a cube of sugar 2. a block of wood 3. a strap of…

A: Pure substances are substances that are made up of only one kind of particle and have a fixed or…

Q: What is the only physical difference between heavy water and pure water?

A: Water is the main element of Earth's hydrosphere and essential for the livelihood of a living…

Q: How many moles of LiBr are required to make 300 mL of a 3.00 M solution?

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Q: "Entrainer" is used in which type of distillation?

A: Given: Entrainer is used in which type of distillation?

Q: Air N Linseed oil Water

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Q: By using phenolphthalein as indicator ( in titration of hydrochloric acid with sodium carbonate )…

A: By using phenolphthalein as indicator (in titration of hydrochloric acid with sodium carbonate )…

Q: ess of coating (n = 6/4

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Q: Which of the following substances is NOT homogeneous? O 1. iron O 2. water 3. sand O 4. sugar

A: Homogeneous mixture is uniform composition

Q: Differentiate between endothermic reactions and exothermic reactions?

A: Endothermic Reactions: A reaction that the system absorbs energy from its surrounding in the form of…

Q: an irregularly shaped piece of metal of density 7.80 g/cm^3 weighs 429g when completely immersed…

A: Given : dA=7.80 g/cm3              m=429g            (apparent weight)              dn=1.2 g/cm3 As…

Q: What would be the molarity of a solution in which 0.340 mole of NaCl is dissolved in enough water to…

A: The number of moles of the solution is 0.340 mole. The volume of the solution is 2.40 L.

Q: Discuss in detail about the findings in kircchoffs law

A: Kirchhoff's law: Introduced by physicist Gustav Kirchhoff. This law permits to solve complex…

Q: Two neutral molecules

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Q: Gold occurs in seawater at an average concentration of 1.1102 ppb. How many liters of seawater…

A: Given- Average concentration of the gold in seawater =1.1×10-2 ppb Density of seawater =1.025 g/mL 1…

Q: In a solution there are 11 kg/L (kilograms of solute that are dissolved in 1liter solvent). A drug…

A: Given data The quantity of solute is Qs = 11 kg/L   The unit of solute is converted in terms of g/oz…

Q: Why is it that only sulphide ores are concentrated by ‘froth floatation process’?

A: Froth flotation is one of the most popular operational processes for mineral beneficiation. In…

Q: What substances trap heat from the Earth in the atmosphere?

A: The substances which trap heat emitted by Earth to atmosphere are called green house gases. It works…

Q: How would you classify Table Sugar and table salt? An atom, elements, mixtures or a pure substance…

A: A pure substance is a form of matter having uniform chemical composition and characteristic…

Q: 13. When a solid changes immediately to a gas, this process is called: Sublimation Condensation…

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Q: When solid copper and zinc are mixed to form the metal alloy brass, what kind of mixture results?

A: Alloy is formed by mixing two or more materials together. It can be homogeneous or heterogeneous.

Q: What are the limitations of first law of thermodyamics?

A: Limitations of the first law of thermodynamics:

Q: Find the molarity of a KOH solution if 12ml of 0.3M HCI solution is neutralized by 21ml of KOH…

A: Molarity of HCL is 0.3 M Volume of HCL is V1 = 12 ml = 12 x 10-3 L Volume of KOH is V2 = 21 ml = 21…

Q: What is a mixture? Give three examples?

A: The mixtures are formed by mixing the two or more substances with each other without combining…

Q: Give a reason why soda drinks should be in plastic bottles rather than in aluminum cans?

A: A typical soda drink may contain acids like citric acid which can react with metallic containers and…

Q: When blue litmus paper turns red, the substance being tested is acidic basic

A: Here talking about the compounds PS test. Here given a blue litmas paper turns red. We have to find…