Description : Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used (A) As a lubrican (B) As a rust preventive (C) In hard water for cleaning of cloth (D) As a foam depressant in distillation column
Last Answer : (A) As a lubricant
Description : During electrolysis of aqeous solution of NaCl, there are two type of anions are present Cl- and –OH, Cl- is discharged first than –OH,although it is present below Cl- in electrochemical series. Give reason.
Last Answer : Ans: During this electrolysis process Chloride ions come from NaCl, which is a strong electrolyte and ionize to large extent so concentration of chloride ions in solution will be high. ... chloride ions it is first discharged despite of its presence above than hydroxyl in electrochemical series.
Description : Assertion: In acute constipation, purgative containing magnesium salts are generally used. Reason: The osmotic effect of `Mg^(2+)` in the intestinal l
Last Answer : Assertion: In acute constipation, purgative containing magnesium salts are generally used. Reason: The osmotic ... `Mg^(2+)` is absorbed very slowly
Description : Crude oils containing more than __________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a 'salty crude'. (A) 1 (B) 5 (C) 15 (D) 25
Last Answer : (B) 5
Description : In terms of valence electrons what is the different between metallic elements and nonmetallic elements?
Last Answer : Feel Free to Answer
Description : Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride
Last Answer : (c) Magnesium
Description : 1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science
Last Answer : a) It is because nuclear charge increases due to increase in atomic number, therefore, force of attraction between nucleus and valence electrons increases, i.e. effective nuclear charge increases, hence ... element is ‘F’ because it can gain electrons easily due to smallest atomic size.
Description : Although we all like to believe that we are part of the solution, or that we have the solution, how do we, you, I, how do we know that we're not part of the probem?
Last Answer : answer:Who is determining what “reality” is? Why do you accept that “reality” is that you are part of the problem? I suspect that we each are part of the solution AND part of the problem – and maybe both at the same time sometimes. Cut yourself some slack! :)
Description : In Linux (Portuguese www.caixamagica.pt version, although I expect a common solution...) how can I make a key combination to generate the at sign?
Last Answer : Your keyboard layout probably isn’t configured correctly, try going to the keyboard settings and selecting a layout that fits your keyboard. Also, you’re not just using “Linux”, but a certain Linux distribution, e.g. Ubuntu. It would be handy to know the name of this distribution.
Description : Many globular proteins are stable in solution although they lack in (A) Hydrogen bonds (B) Salt bonds (C) Non-polar bonds (D) Disulphide bonds
Last Answer : Answer : D
Description : 20. The influential paper titled Programming a Computer for ____ ____ was published by Claude Shannon in 1950 with the introduction: This paper is concerned with the problem of constructing a ... attacking other problems of a similar nature and of greater significance.' Fill up the blanks
Last Answer : Playing Chess.
Description : Among the following propositions two arc related in such a way that they can both be true although they cannot both be false. Which are those propositions? Select the correct code. Propositions: (a) Some priests are cunning. (b) No priest ... (b) (B) (c) and (d) (C) (a) and (c) (D) (a) and (d)
Last Answer : Answer: D
Description : If two propositions are connected in such a way that they cannot both be false although they may both be true, then their relationship is called (A) Contrary (B) Subcontrary (C) Contradictory (D) Subalternation
Last Answer : (B) Subcontrary
Description : English is such an idiomatic, and phonetic language. Why hasn't there been a (successful) attempt to "fix it" - i.e. cough, although, knight et al?
Last Answer : I thought the Americans tried – “color” / “colour” is one example. I don’t know how you judge if it is successful or not.
Description : Benedict’s test is less likely to give weakly positive results with concentrated urine due to the action of (A) Urea (B) Uric acid (C) Ammonium salts (D) Phosphates
Last Answer : B
Description : (2) amount of oxygen used for biochemical oxidation Explanation: Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to ... quantitative test, although it is widely used as an indication of the organic quality of water.
Last Answer : The addition of gypsum to port-land cement helps in : (1) increasing the strength of cement (2) rapid setting of cement (3) preventing rapid setting of cement (4) reduction in the cost of cement
Description : To assess circulating oxygen levels the 2001 Kidney Disease Outcomes Quality Initiative: Management of Anemia Guidelines recommends the use of which of the following diagnostic tests? a) Hemoglobin ... gases Arterial blood gases assess the adequacy of oxygenation, ventilation, and acid-base status.
Last Answer : a) Hemoglobin Although hematocrit has always been the blood test of choice to assess for anemia, the 2001 Kidney Disease Outcomes Quality Initiative: Management of Anemia Guidelines, recommend that ... rather than hematocrit measurements, as it is more accurate in assessment of circulating oxygen.
Description : Petroleum is a mixture of – (1) elements (2) hydrocarbons (3) polymers (4) salts
Last Answer : (2) hydrocarbons Explanation: Petroleum or crude oil is a naturally occurring flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid ... zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure.
Description : Petroleum is a mixture of (1) elements (2)hydrocarbons (3) polymers (4) salts
Last Answer : hydrocarbons
Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science
Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.
Description : Name two elements, which are Non-metallic in nature in 5th A group ?
Last Answer : Nitrogen and Phosphorous
Description : What are the only two metallic elements that end with the letter "d"?
Last Answer : ANSWER: GOLD AND LEAD
Description : The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science
Last Answer : (a) Sodium is bigger than magnesium as it has lesser nuclear charge so there is less force of attraction between nucleus and valence electrons and less effective nuclear charge. It is, therefore, ... the most non-metallic element because it can gain electrons easily due to its smallest atomic size.
Description : Consider the elements B, Al, Mg and K predict the correct order of metallic character :
Last Answer : Consider the elements B, Al, Mg and K predict the correct order of metallic character : a. B > Al > Mg > K b. ... Al > K > B d. K > Mg > Al > B
Description : Which metal is more metallic in nature among 1A group elements ?
Last Answer : Francium
Description : Arrange the following elements in increasing order of metallic character: B, Al, Mg and K.
Last Answer : Ans. The correct order is: B
Description : Figure out the odd statement about ceramics in the following (a) Good insulators of heat and electricity (b) Usually less desire than metals (c) Ductile in nature (d) Contains both metallic and nonmetallic elements
Last Answer : (c) Ductile in nature
Description : Which member of the GROUP SIX A elements is the least metallic?
Last Answer : ANSWER: OXYGEN
Description : Metallic elements are often obtained from ores. Name the metallic element which is produced from the ore Bauxite.
Last Answer : ANSWER: ALUMINUM
Description : An inorganic compound X reacts with water to form two cid Y and Z. X also reacts with NaOH to form two salts B and C which remain in solution. The sol
Last Answer : An inorganic compound X reacts with water to form two cid Y and Z. X also reacts with NaOH to form two salts B ... ` C. `SbCl_(3)` D. `PCl_(3)F_(2)`
Description : The metal which cannot be obtained by electrolysis of aqueous solution of its salts is
Last Answer : The metal which cannot be obtained by electrolysis of aqueous solution of its salts is A. Ag B. Mg C. Cu D. Al
Description : Why should you not evaporate all of the water from the copper sulfate solution, when making salts?
Last Answer : it can also causes a chemical reaction which can kill you if it gets through any, yes any hole in your body, so pedos beware
Description : The 'used dialysing' solution is rich in: (a) Urea and excess salts (b) Blood cells (c) Lymph (d) Proteins
Last Answer : (a) Urea and excess salts
Description : A student prepares aqueous solutions of the following salts: Copper sulphate, ferrous sulphate, sodium sulphate and barium chloride. Write the color of each solution thus formed?
Last Answer : Answer. Copper sulphate (aq) – blue in color Ferrous sulphate (aq) – pale green in color Sodium sulphate (aq) – colorless Barium chloride (aq) – white in color
Description : Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide
Last Answer : a)sulphur dioxide
Description : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of two different oxioacids of chlorine, P and Q, r
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of ... `H_3PO_2` D. `SOCl_2 , PCl_5` and `H_3PO_5`
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give ... porchloric acids D. (D) chloric and hypochlorus acids
Description : Two women sit staring and glaring at each other across a small table. Although the two women don't appear to be friendly toward each other, they do eventually hold each other's hands. A man approaches, puts ... is the word the man shouts to the women, and what in the world is going on here? -Riddles
Last Answer : The word the man shouts to the women is, 'Go!' This is the way most women's arm wrestling competitions start, and hopefully the wrist straps, to keep their hands from slipping apart, won't have to be used.
Description : Two compounds have the same composition and also have the same atoms attached to the same atoms, although with different orientations in space. These compounds are (a) Identical (b) Position isomers (c) Structural isomers (d) Stereoisomers
Last Answer : Stereoisomers
Description : Although users aren't supposed to dismiss them, should questions that really should be addressed with a search engine (e.g., google) be flagged?
Last Answer : No. We just answer the questions. Sometimes, if it is very obvious and it’s not a new user, we may gently suggest that search engines are your friends along with providing the answer.
Description : I can be new or old. I am of different types. I am of so many different types that every child can find one of me that they like. I contain links to countless worlds. All people like me, young ... . Although most parents ban me, I am usually the center of attention of any child. What am I? -Riddles
Last Answer : Video Games!
Description : What's the deal with salts and minerals, such as magnesium sulfate, in bottled drinking water?
Last Answer : It's called mineral water for a reason. Natural mineral water comes from under ground springs where the water absorbs minerals and gases as it makes its way to the surface. The different composition of ... added by them. (It also didn't help that the adverts stated that dasani added spunk).
Description : Give reason: Lemon juice kept in metallic cup will taste different but not in ceramic cup.
Last Answer : Lemon juice contains citric acid which reacts with metallic cup and makes it toxic. So it tastes different. Ceramic cup does not react with acid.
Description : Pick out the wrong statement. (A) Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom (B) The heat capacity of solid inorganic substance is exactly equal to the ... isolated system (D) At absolute zero temperature, the heat capacity for many pure crystalline substances is zero
Last Answer : (C) There is an increase in entropy, when a spontaneous change occurs in an isolated system
Description : A man told his son that he would give him $1000 if he could accomplish the following task. The father gave his son ten envelopes and a thousand dollars, all in one dollar bills. He told his ... exact amount of money asked for. How did the son distribute the money among the ten envelopes? -Riddles
Last Answer : The contents or the ten envelopes (in dollar bills) should be as follows: $1, 2, 4, 8, 16, 32, 64, 128, 256, 489. The first nine numbers are in geometrical progression, and their sum, deducted from 1,000, gives the contents of the tenth envelope.
Description : Metal salts, which respond to Borax bead test ?
Last Answer : Metal salts, which respond to Borax bead test ? A. Nickel salts B. Copper salts C. Cobalt salts D. Aluminium salts
Description : Which of the following salts release reddish brown gas when heated in a dry test tube ?
Last Answer : Which of the following salts release reddish brown gas when heated in a dry test tube ? A. `LiNO_(3)` B. `KNO_(3)` C. `Pb(NO_(3))_(2)` D. `AgNO_(3)`
Description : Rothera test is not given by (A) β-hydroxy butyrate (B) bile salts (C) Glucose (D) None of these
Last Answer : A
Description : Give reason: When a glass test tube containing a mixture of chloroform and acetone is immersed in water will disappear.
Last Answer : The mixture of acetone and chloroform has the same refractive index as that of the glass. The surface of glass will not reflect light. Hence the test tube appears to disappear.