Description : SnO2 forms a positively charged colloidal sol in acidic medium and a negatively charged sol in the basic medium. Why ?
Last Answer : Ans. SnO2 is amphoteric in nature. It reacts with acid eg. HCl to form SnCl4 in the solution. The common Sn4+ ions are adsorbed on the surface of SnO2 particles giving them a positive ... solution. The stannate ions are adsorbed on the surface of SnO2 particles giving them a negative charge.
Description : Identify dispersed phase and dispersion medium in the following colloidal dispersions : a. milk b. blood c. printing ink
Last Answer : Identify dispersed phase and dispersion medium in the following colloidal dispersions : a. milk b. blood c. printing ink d. fog
Description : (4) Water drops in a dispersion medium of air Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed ... or gas. Cloud is a colloidal dispersion of Water drops in a dispersion medium of air.
Last Answer : Conduction band electrons have more mobility than holes because they – (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them
Description : (2) Fat is dispersed in water Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed ... Milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution.
Last Answer : The presence of ozone in the stratosphere is responsible for – (1) increasing the average global temperature in recent years (2) higher rate of photosynthesis (3) checking the penetration of ultra-violet rays to the earth (4) supplying oxygen for people travelling in jets
Description : If an electric field is applied to a colloidal sol, the dispersed phase particles are found to move towards the electrode of opposite charge. If however, the dispersed phase is made stationary, the ... move in the opposite direction. What is the term used for such movement of dispersion medium ?
Last Answer : Ans. Electro osmosis.
Description : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as :
Last Answer : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as : A. aerosol B. foam C. emulsion D. gel
Description : A colloidal system in which a liquid is dispersed in a liquid is called – (1) gel (2) emulsion (3) sol (4) precipitate
Last Answer : (2) emulsion Explanation: An emulsion is a mixture of two or more liquids that are normally immiscible (nonmixable or unblendable). Emulsions are part of a more general class of two-phase ... ). Examples of emulsions include vinaigrettes, milk, mayonnaise, and some cutting fluids for metal working.
Description : A colloidal system in which a liquid is dispersed in a liquid is called (1) gel (2) emulsion (3) sol (4) precipitate
Last Answer : emulsion
Description : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved
Last Answer : Fat is dispersed in water
Description : Comprehension # 2 The clouds consist of charged particles of water dispersed in air. Some of them are +vely charged, others are -vely charged. When +v
Last Answer : Comprehension # 2 The clouds consist of charged particles of water dispersed in air. Some of them ... dispersed in air by aeroplanes D. None of these
Last Answer : Comprehension # 2 The clouds consist of charged particles of water dispersed in air. Some of them are + ... C. it helps in coagulation D. all of them
Last Answer : Comprehension # 2 The clouds consist of charged particles of water dispersed in air. Some of them are ... sol"` C. neutral sol D. True solution
Description : Which of the following statem Which of the following statements are true about an ents are true about anticipation inventory? ticipation inventory? a)Inventory increases during periods of light demand b ... c)Increase in anticipation inventory leads to increases in pipeline inventory d)Both a and b
Last Answer : d)Both a and b
Description : Which of the following statem Which of the following statements does NOT apply to ents does NOT apply to a production plan? a production plan? a)Plans are consistent with company's strategic ... a bridge between the strategic and operational plans d)Provides a view of detailed work-force schedules
Last Answer : c)Serves as a bridge between the strategic and operational plans
Description : "The solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid" is a fair statem of: w) Dalton's secondary law x) Le Chatelier's solubility principle y) Henry's law z) none of the above
Last Answer : ANSWER: Y -- HENRY'S LAW
Description : 3. A positively-charged particle (alpha-particle) projected towards the west is deflected towards north by a magnetic field. The direction of magnetic field is -Physics-10
Last Answer : The direction of the magnetic field can be determined using the Fleming’s Left hand rule. According to the rule, if we arrange our thumb, forefinger and the middle finger of the left ... north, hence the direction of magnetic field will be upward according to Fleming’s Left hand rule.
Description : Why are histones positively charged? -Biology
Last Answer : answer:
Description : A hollow sphere of copper is positively charged, Then what will the electric field be inside the sphere? -Do You Know?
Description : Which of the following is a positively charged particle of an atom ?
Last Answer : A positively charged particle proton of an atom.
Description : Canal rays are positively charged.
Last Answer : Canal rays are positively charged.
Description : Which of the following sols is positively charged ?
Last Answer : Which of the following sols is positively charged ? A. Arsenious sulphide B. Aluminium hydroxide ... D. Silver iodide in silver nitrate solution
Description : When negatively charged colloids like `As_(2)S_(3)` sol is added to positively charged `Fe(OH)_(3)` sol in suitable amounts
Last Answer : When negatively charged colloids like `As_(2)S_(3)` sol is added to positively charged `Fe ... colloids. D. They become negatively charged colloids.
Description : (A) Protons are better projectiles than neutrons. (R ) The neutrons being neutral do not experience repulsion from positively charged nucleus.
Last Answer : (A) Protons are better projectiles than neutrons. (R ) The neutrons being neutral do not experience repulsion ... If both (A) and (R ) are incorrect.
Description : The alpha particles are A)High`-` energy electrons B)Positively charged hydrogen ions C) High`-` energy `X-` rays radiations D)Double positively charg
Last Answer : The alpha particles are A)High`-` energy electrons B)Positively charged hydrogen ions C) ... ray radiations D. double positively charged helium nuclei
Description : What is a positively-charged partica found free or in a nucleus?
Last Answer : Need answer
Description : Is human blood positively or negatively charged?
Last Answer : Neither, blood is neutral.It does contain both positively and negatively charged ions, butin equal amounts so that they cancel.
Description : Who Positively charged nucleus?
Last Answer : Feel Free to Answer
Description : What happens to an object atoms when the object become positively charged?
Last Answer : Physics
Description : When water breaks apart it releases positively charged hydrogen ions and negatively charged ions?
Description : What positively charged particle is located in the nucleus of an atom?
Last Answer : This particle is the proton.
Description : How does an atom become positively charged?
Last Answer : An atom gains a positive charge by losing electrons.
Description : What happens when you bring a negative and positively charged ion together?
Last Answer : If a negative ion meets a positive ion they may form an ionic compound.
Description : Alpha particles are positively charged. They most likely have which of these?
Last Answer : more protons than electrons A+
Description : Can two positively charged body attract each other?
Last Answer : yes--consider two charged bodies (having positive charge). One body is very large in comparison to the other. The large body will induce opposite charge in the small body and thus both will attract each other
Description : The true statement about solutions of amino acids at physiological pH is (A) All amino acids contain both positive and negative charges (B) All amino acids contain positively charged side chains ... amino acids contain only positive charge (D) All amino acids contain negatively charged side chains
Last Answer : Answer : A
Description : A good conductor while carrying current is - (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral
Last Answer : (2) negatively charged Explanation: Electrons carry current in a good conductor of electricity and they are negatively charged. This makes a good electrical conductor negatively charged.
Description : X-rays are – (1) positively charged particles (2) negatively charged particles (3) neutral particles (4) None of these
Last Answer : (3) neutral particles Explanation: Like gamma rays and neutrons, X-rays are electrically neutral. They have neither a positive nor a negative charge. They cannot be accelerated or made to ... particles (electrons and positrons) and heavy charged particles (protons, alpha particles and heavier ions).
Description : A wire carrying current is – (1) positively charged (2) negatively charged (3) neutral (4) charged with a type depending upon current strength
Last Answer : (3) neutral
Description : A hollow sphere of copper is positively charged, Then what will the electric field be inside the sphere?
Last Answer : Zero
Description : ------- are positively (+) charged particles? A. Neutrons B. Electrons C. Protons (Answer) D. None of These
Last Answer : C. Protons (Answer)
Description : When one material is rubbed against the other, then it becomes electrically A. neutral B. charged C. positively charged D. negatively charged
Last Answer : charged
Description : Which of the following activates Hageman factor in blood clotting? B A. Kinins B. Negatively charged surfaces C. Complement C5a D. Positively charged collagen
Last Answer : Negatively charged surfaces
Description : What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ? (a) The smaller the fragment size, the farther it moves. (b) Positively charged fragments move to farther end. ... charged fragments do not move. (d) The larger the fragment size, the farther it moves.
Last Answer : (a) The smaller the fragment size, the farther it moves
Description : DNA fragments are (a) negatively charged (b) neutral (c) either positively or negatively charged depending on their size (d) positively charged
Last Answer : (a) negatively charged
Description : Positively charged ions are called a. anions b. cations c. both d. none of them
Last Answer : cations
Description : Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as (a) neutral ions (b) negatively charged ions (c) positively charged ions (d) both positively and negatively charged but disproportionate mixture.
Last Answer : (b) negatively charged ions
Description : Aerosols present in atmospheric air may be (A) Positively charged (B) Negatively charged (C) Neutral (D) Combination of all (A), (B) & (C)
Last Answer : (D) Combination of all (A), (B) & (C)
Description : A zwitterion is (a) an ion that is positively charged in solution (b) an ion that is negatively charged in solution (c) a compound that can ionize both as a base and an acid. (d) a carbohydrate with an electrical charge.
Last Answer : a compound that can ionize both as a base and an acid