Description : Which among the following is false about acids? (1) They give H+ ions in aqueous solution (2) Most acids contain hydrogen (3) They turn blue litmus red (4) They are bad conductor of electricity in aqueous solution
Last Answer : (4) They are bad conductor of electricity in aqueous solution Explanation: Acids are good conductors of electric current in aqueous solution. When acids come in contact with water, they liberate OH ions, resulting in conduction of electricity.
Description : Which of the following is NOT a general property of hydroxide bases in aqueous solution? w) High solubility x) Bitter taste y) Ability to neutralize aqueous acid solutions z) Ability to change phenolphthalein from colorless to red
Last Answer : ANSWER: W -- HIGH SOLUBILITY (The hydroxides of the alkali metals are soluble in water but all the other metal hydroxides are only moderately or sparingly soluble.)
Description : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid
Last Answer : (d) Hydrochloric acid
Description : One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue
Last Answer : (4) Its aqueous solution turns red litmus blue Explanation: The main use of litmus is to test whether a solution is acidic or basic. For instance, ammonia gas, which is alkaline, colours the red litmus paper blue.
Description : If a solution turns blue litmus red, its pH is likely to be : (1) 7 (2) 8 (3) 9 (4) 6
Last Answer : (4) 6 Explanation: An acidic solution turns blue litmus red. On the pH scale, acids have values less than 7, whereas bases have values greater than 7. Solutions with pH equal to 7 are neutral in nature. Therefore the pH of the given solution is likely to be 6.
Description : A solution turns blue litmus red, its pH is likely to be - (1) 11 (2) 9 (3) 5 (4) 10
Last Answer : (3) 5 Explanation: If the litmus paper turns red, it indicates the presence of an acid while if it turns blue, it indicates the presence of a base.
Description : One property of ammonia is (1) It is insoluble in water (2) It is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue
Last Answer : Its aqueous solution turns red litmus blue
Description : Select from the following the statement which is true for bases. (a) Bases are bitter and turn blue litmus red. (b) Bases have a pH less than 7 (c) Bases are sour and change from red litmus to blue. (d) Bases turn pink when a drop of phenolphthalein is added to them.
Last Answer : Answer: (d) Bases turn pink when a drop of phenolphthalein is added to them.
Description : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ? -SST 10th
Last Answer : D - The aqueous solution is a base as it turns red litmus solution blue. An acidic solution such as hydrochloric acid would reverse the change. In contrast, hydrochloric acid would turn blue ... not be able to reverse the change. These substances would only change red litmus solution to blue.
Description : A solution which turns red litmus to blue is called?
Last Answer : Metalloids
Description : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t
Last Answer : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) ... )` D. Average oxidation state of iodine in X is `+5`
Description : Blue Litmus Paper turns _______ on contact with an acidic solution
Last Answer : Red
Description : Acid turns blue litmus paper to?
Description : In a flame test, the presence of copper in a solution is evident by what color flame? Is the flame w) red x) orange y) indigo z) blue-green
Last Answer : ANSWER: Z -- BLUE-GREEN
Description : Diamond has each of the following properties except: w) extreme hardness x) ability to conduct electricity y) high melting point z) tendency to burn in air
Last Answer : ANSWER: X -- ABILITY TO CONDUCT ELECTRICITY
Description : You are performing an out-of-circuit test of the semi-conductor shown in the illustration. Using an ohmmeter on 'low power' position and with leads properly installed, which of the listed results would you expect the ... lead on 'B' and black lead on 'A'; and a low reading with the leads reversed.
Last Answer : Answer: B
Description : Blue litmus paper is converted into red in solution of which thing? -Do You Know?
Last Answer : Acid Blue litmus turns red in acids and Red litmus turns blue in bases
Description : Blue litmus paper is converted into red in solution of which thing?
Last Answer : acid
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 : What's that stuff that looks like chocolate but tastes extremely bitter and makes people want to throw up?
Last Answer : Your professor didn’t tell you?! And let her students start gagging? That doesn’t sound like appropriate teaching to me?
Description : What turns tetul blue litmus paper into what ?
Last Answer : Tetul converts blue litmus into red litmus.
Description : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :
Last Answer : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is : A. `Na_(2) ... C. `NaNO_(3)` D. `K_(2)CO_(3)`
Description : Which of the answers listed below best completes the statement: The rate at which any part of a wave travels from one place to another determines the wave's: w) propagation velocity x) period y) amplitude z) frequency
Last Answer : ANSWER: W -- PROPAGATION VELOCITY
Description : The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene
Last Answer : ANSWER: W -- CaCl2
Description : Which of the following properties is lower for a solution than for the pure solvent? w) osmotic pressure x) vapor pressure y) temperature z) boiling point
Last Answer : ANSWER: X -- VAPOR PRESSURE
Description : Which of the following properties is greater for a solution than for the pure solvent? w) freezing point x) vapor pressure y) temperature z) boiling point
Last Answer : ANSWER: D -- BOILING POINT
Description : Dry ammonia gas has no action on litmus paper but a solution of ammonia in water turns litmus paper color. Why?
Last Answer : Answer. A solution of ammonia in water produces OH– ions which make the solution basic and turn red litmus paper blue.
Description : Bases turns red litmus paper into?
Last Answer : Blue
Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.
Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.
Description : Acids turn blue litmus into which color? (1) Green (2) Red (3) Pink (4) Colourless
Last Answer : (2) Red Explanation: Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F).
Description : What is better tasting when it tastes bitter?
Last Answer : answer:Gin and tonic. Lime anything! A good marmalade. A concoction that is both bitter and sweet can be delicious.
Description : No food tastes good , why does everything taste bad ? I had a fever 15 days ago. 1 week was sustainable. I can't eat anything now, it tastes bitter. Rice looks disgusting! I feel very hungry but I can't eat! I also took vitamin medicine from Dr. Didn't work. What to do ?
Last Answer : : You will be better if you eat sinkara syrup which enhances your taste. InshaAllah. Avoid fried , televaja food.
Description : The fruit when kept is open, tastes bitter after 2 hours because of (A) Loss of water from juice (B) Decreased concentration of fructose in juice (C) Fermentation by yeast (D) Contamination by bacterial enzymes
Last Answer : Answer : D
Description : Your tongue is home to special structures that allow you to experience tastes such as sour, sweet, bitter and salty, what is their name?
Last Answer : Taste buds
Description : Which of the following would you expect to have the highest boiling point? w) methane x) carbon tetrachloride y) chloroform z) chloromethane
Last Answer : ANSWER: X -- CARBON TETRACHLORIDE
Description : If the first ionization energy of magnesium is 176 kilocalories per mole, one would expect the second ionization energy t be approximately: w) 350 kilocalories per mole x) 1,760 kilocalories per mole y) 200 kilocalories per mole z) 20 kilocalories per mole
Last Answer : ANSWER: W -- 350 KILOCALORIES PER MOLE
Description : What substance will turn blue litmus paper red?
Last Answer : Need answer
Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid
Last Answer : B) Has low melting point
Description : A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green
Last Answer : ANSWER: W -- RED
Description : Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange
Last Answer : ANSWER: W -- BLUE-WHITE
Description : The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift
Last Answer : ANSWER: Y -- RED SHIFT
Description : Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: w) red light is focused more strongly than blue light x) blue light is focused more strongly than ... central rays, z) the central light rays are focused more strongly than the outer rays.
Last Answer : ANSWER: X -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT
Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it: w) red x) yellow y) blue z) violet
Description : In daylight the human eye is most sensitive to which color? w) Green x) Red y) Blue z) Orange
Last Answer : ANSWER: W -- GREEN
Description : Which of the following forms the weakest acid in aqueous solution? w) hydrogen fluoride x) hydrogen chloride y) hydrogen bromide z) hydrogen iodide
Last Answer : ANSWER: W -- HYDROGEN FLUORIDE
Description : Which of the following aqueous solutions would hav the lowest boiling point? Would it be a 1.0 molal solution of: w) Hydrochloric acid x) Sodium Hydroxide y) Acetic Acid, z) Magnesium Chloride
Last Answer : ANSWER: Y -- ACETIC ACID
Description : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction
Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead ... )Orarr` D. `SO_(2)+H_(2)O_(2)rarr`
Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate ... 2)` C. `H_(2)S` D. `SO_(3)`
Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate ... SO_(2)` D. `SO_(2) and O_(3)`
Description : What do you observe when red litmus is added to a solution of sodium sulphate?
Last Answer : Sodium sulfate solution is neutral; the red litmus is purple.