TIPS TO STUDENTS You are here:Home»Chemistry»Acid, Base and Salt | Important Questions 26 NOV 2012 Q.1 What is a universal indicator? What is the color change of universal indicator in strong acid and strong base? Q.2 If a compound gives hydrogen ion and sulphate ion in the solution state, answer the following questions related to that compound. i. Write down the name and molecular formula of the compound. ii. Write down the balanced chemical equation of the chemical reaction that takes place between the compound and the metal Aluminum. Q.3 Define acid. When HCl is dissolved in water, it can conduct electricity, why? Write chemical equation for the reaction that takes place when NaOH is added to the above solution. Q.4 Give the definition of acid and base. Explain why water can be considered as an acid as well as a base. Q.5 What happens when lime water is added to dilute solution of hydrochloric acid with water? Q.6 What changes occur in water when H2SO4 is dissolved in it so that the water becomes a good conductor of electricity? Write the appropriate chemical equation. Why is H2SO4 called as acid? Q.7 Name the compound which gives hydrogen and sulphate ion in solution. Write down the balanced chemical equation of the chemical reaction occurred when above compound is treated with sodium hydroxide. Q.8 What are alkalis? Write the ions present in aqueous sodium hydroxide. Q.9 What do you mean by an acid? Give any two tests for an acid. Q.10 Distinguish between organic acid and inorganic acid with three examples each. Q.11 Write down the name of acid found in human stomach. What type of acid is it? Q.12 Match the following: Vinegar ascorbic acid Lemon juice acetic acid Acrid milk citric acid Vitamin ‘C’ lactic acid Q.13 Write down 2/2 advantages and disadvantages of acid. Q.14 What is the difference between strong and weak acids? Q.15 How can you prepare acid? Write two methods with reactions Q.16 What happens when zinc is treated with dil. Sulphuric acid? Does same reaction occur by copper, if zinc is replaced by it? Q.17 What is acid anhydride? Write any three acid anhydrites mentioning their corresponding acids. Q.18 What do you mean by a base? Identify the base in following oxides: CO2, FeO, Fe3O4, Na2O, CuO, ZnO, SO2, P2O5, MnO. Q.19 “K2O is an alkali whereas CuO is not”, why? Q.20 All the alkalis are base but all bases are not alkalis, why? Q.21 Write down the two advantages and disadvantages of base or alkali. Q.22 If a dilute solution of bitter taste is give, mention any two processes to confirm it as an alkali. Q.23 Does an alkali furnish OH ion in aqueous solution? Q.24 Is water acid or base? Explain with reason. Q.25 What is neutralization reaction? Write down any two uses of neutralization reaction. Q.26 How can you prepare the acid starting from carbon? Q.27 Can you prepare alkali solution from magnesium ribbon? Write with reaction. Q.28 How is alkali different from base? Q.29 What is salt? Give any three methods of preparation of salt. Q.30 Identify the type of salts given below: NaCl, KCl, NaCO3, ZnCl2, ZnSO4,CH3COONa, NaHSO4, CuSO4, KNO3. Q.31 What is acidic salt? How is it identified? Q.32 Mention any two differences between acids and bases. Q.33 What is litmus? What are its uses? Q.34 What is meant by PH? If the PH of soil is less than 7, how is it neutralized? Q.35 What is universal indicator? How is it different from ordinary indicator? Q.36 What are PH meter and PH paper? Q.37 Write the color achieved by litmus, phenolphthalein and methyl orange in acid and base. Q.38 What is the PH of a neutral substance? Give examples also. Q.39 Complete the following equations: i. Zn + H2SO4 → ……….. + …….. ii. HCl + Na2CO3 → ………. . + ……. iii. CuO + H2SO4 → ………. . + ……. iv. MgO + H2O → ……….. v. CO2 + H2O → ……….. Q.40 The acetic acid and liquor ammonia are weaker acid and base, respectively, why? Q.41 There are three vessels containing acid, base and salt solution separately. Using the indicator of litmus and methyl orange. Mention how each of them is identified separately. Q.42 Write down the name and molecular formula of the compound which gives hydrogen ion and chloride ion in the solution state. In which color is the litmus solution changed after treating it with above compound, why? What is the name of salt when same compound is treated with sodium hydroxide? Write down with chemical equation. Q.43 Define acid. Give a balanced chemical equation of the formation of neutral salt by the reaction between a strong acid and strong base. Q.44 A compound gives hydrogen ion and chloride ion in the solution state. Answer the following questions related to this statement. i. Write down the name and molecular formula of the compound.< ii. In what color is methyl orange changed when it is treated with above compound, why? iii. Write down the name of salt formed by the chemical reaction of above compound, why? Q.45 There are three vessels containing acid, base and salt solution separately. Using the indicators of phenolphthalein and red cabbage juice, mention how each of them is identified separately. Q.46 Convert the word equation into balanced chemical equation and what will be the value of PH of compounds formed by this reaction? Q.47 Write down the molecular formula of following acid, base or salts. Carbonic acid, Formic acid, Acetic acid, Oil of Vitriol, Caustic soda, Caustic potash, Slaked lime, Milk of lime, Quick lime, Milk of magnesia, Common salt, Soda ash, Pearl of ash, Washing soda, Baking soda, Blue Vitriol, Sal-ammoniac, nitre, Epsom salt, Gypsum salt, Lunar caustic. Q.48 Write the balanced chemical equation for the reaction between dilute hydrochloric acid and that metal. Which compound is formed from this relation?
Posted on: Thu, 12 Sep 2013 04:34:34 +0000
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