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 : 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 : 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 : 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 : 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 : Which of the properties listed below would you expect a solution to have if it is an acid? w) It feels slippery to the touch. x) It tastes bitter. y) It turns red litmus blue. z) It is a conductor of electricity.
Last Answer : ANSWER: Z -- IT IS A CONDUCTOR OF ELECTRICITY.
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 : A solution which turns red litmus to blue is called?
Last Answer : Metalloids
Description : Blue Litmus Paper turns _______ on contact with an acidic solution
Last Answer : Red
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 : 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 : 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 : 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 : Acid turns blue litmus paper to?
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 : Bases turns red litmus paper into?
Last Answer : Blue
Description : All noble gases are - (1) Colourless (2) Odourless (3) Colourless and Odourless (4) Light blue
Last Answer : (3) Colourless and Odourless Explanation: Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.
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 : Which of the following is the strongest base in aqueous solution? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : (1) Diethylamine Explanation: Amines are organic derivatives of ammonia, in which one, two, or all three of the hydrogens of ammonia are replaced by organic groups. All aliphatic primary amines are stronger bases than ammonia.
Description : FeSO4 solution mixed with (NH4 ) 2 SO4 solution in 1 : 1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1 : 4 molar ratio does not give the test of Cu2+ ion. Explain why ?
Last Answer : When FeSO4 and (NH4 ) 2 SO4 solution are mixed in 1 : 1 molar ratio, a double salt is formed. It has the formula FeSO4 (NH4 ) 2 SO4 . 6 H2O. In aqueous solution, the salt dissociates. When CuSO4 and NH3 are mixed in the molar ratio of 1 : 4 in solution, a complex [Cu (NH3 ) 4 ] SO4 is formed.
Description : Which of the following is a strong electrolyte in aqueous solution. w) ammonia x) coffee y) Gatorade z) corn syrup
Last Answer : ANSWER: Y -- GATORADE
Description : Which of the following is the strongest base in aqueous solution ? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : Diethylamine
Description : Which gas turns litmus colourless?
Last Answer : Chlorine
Description : Aqueous solution of how many of the following species turn blue limtus red ? (i) `SF_(4)` (ii) `PCl_(3)` (iii) `H_(2)O` (iv) `NO_(2)Cl` (v) `SF_(6)` (
Last Answer : Aqueous solution of how many of the following species turn blue limtus red ? (i) `SF_(4)` (ii) `PCl_(3)` ( ... )` (xii) `COCl_(2)` (viii) `C Cl_(4)`
Description : Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)
Last Answer : (B) Fruit juices, milk & its products and caustic soda solution
Description : What substance will turn blue litmus paper red?
Last Answer : Need answer
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 : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve
Last Answer : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A ... . The structure ofA is A. B. C. D.
Description : NaH2PO4 Why ammonia in aqueous solution ?
Last Answer : NaH₂PO₄ is acidic in aqueous solution . This is because in aqueous solution it decomposes and produces ions. Since H₂PO₄ is acidic in NaH₂PO₄ → Na + + H₂PO₄ , the aqueous solution is also acidic.
Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre
Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.
Description : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of :
Last Answer : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of : A. NO B. `NO_(2)` C. `N_(2)O` D. `N_(2)O_(4)`
Description : Paper turns yellowish with age due to the presence of the chemical
Last Answer : lignin.
Description : Compound (A)`C_(7)H_(8)O` is insoluble in aqueous `NaHCO_(3)` and dissolves in aqueous NaOH and gives a characteristic colour with neutral `FeCl_(3)`
Last Answer : Compound (A)`C_(7)H_(8)O` is insoluble in aqueous `NaHCO_(3)` and dissolves in aqueous NaOH and gives a ... colour with `FeCl_(3)`? A. B. C. D.
Last Answer : Compound (A)`C_(7)H_(8)O` is insoluble in aqueous `NaHCO_(3)` and dissolves in aqueous NaOH and gives a ... compound (B) would be : A. B. C. D.
Last Answer : Compound (A)`C_(7)H_(8)O` is insoluble in aqueous `NaHCO_(3)` and dissolves in aqueous NaOH and gives a ... structure of compound A is : A. B. C. D.
Description : Bromine is- (1) Colorless gas insoluble in water (2) A highly inflammable gas (3) A Black solid (4) A red liquid
Last Answer : (4) A red liquid Explanation: Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming liquid with a deep red color. At room temperature, Bromine evaporates readily to form a red to amber colored gas.
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.
Description : An aluminium strip is kept immersed in a freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that a) Green solution slowly turns brown b) Lower end of the test ... c)A colourless gas with smell of burning sulphur is evolved c)Light green solution changes to blue
Last Answer : a) Green solution slowly turns brown
Description : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C`. For this process, the correct statement is
Last Answer : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C` ... of temperature. D. The adsorption is irreversible.
Description : Clear organe solution of chromic anhydride in aqueous sulpuric acid turn blue-green on reaction with
Last Answer : Clear organe solution of chromic anhydride in aqueous sulpuric acid turn blue-green on reaction with A. ... 2-Methyl-2-propanol D. 2-Methyl-2-butanol
Description : Benzoic acid and diphenyl ketone are both solids insoluble in water. A mixture of these compounds can be separated if we (a) add the mixture to a solution of NaOH in water, and filter. (b) add ... benzene. (d) It is impossible to separate a mixture of two solids when both are insoluble in water.
Last Answer : add the mixture to a solution of NaOH in water, and filter
Description : Which one makes litmus red ?
Last Answer : HCI turns litmus red.
Description : By adding 1 ml of Orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution (A) Yellowish (B) Greenish (C) Bluish (D) Reddish
Last Answer : (A) Yellowish
Last Answer : Acid turns blue litmus paper red.
Description : Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.
Last Answer : The platinum electrodes are inert. Hence does not dissolve into the solution. The Cu++ ions (blue) present in the solution are discharged on the surface of cathode & OH - are ... a result of this electrolysis, blue coloured CuSO4 solution is slowly converted into colorless H2SO4 solution.