Deep CLASSES (SCIENCE
AND TECHNOLOGY)—STD X (MARKS-90 TIME
:1 HOUR 20 MIN)
1. In Latin, _____________ means sour.
2. Substances which are __________ to taste are Bases.
3. The acidic and basic nature of compounds can also be indicated by some natural as chemical substances called as _______________.
4. Litmus paper or solution is obtained from a plant named _________________.
5. ____________turn red litmus blue.
6. Certain substances whose odour changes in acidic or basic medium are called as ______________indicators.
7. Eosin is a _______________indicator.
8. Beet root is a _______________indicator.
9. ___________________of several indicators is known as universal indicator.
10. Bases contain _______________ions.
11. In German language, _______________means strength.
12. At the value 7, the solution is _____________.
13. When acids in aqueous give more number of H+ are termed as ______________________.
14. Lime water with butter having ________________________ can cure acidity.
15. Based on principle of _________________, like ‘dissolves like’, acidity can be controlled by acidic substance mixed with basic substance.
16. Jaggery is used with _______________while cooking to maintain pH of our body.
17. When pH value is between 7 to 14 , the nature of solution becomes _________ /____________.
18. The human body works within _____ range of 7.35 to 7.45.
19. Tooth enamel is made up of hard matter named __________________________________.
20. Food particles are degraded by bacteria in the mouth to produce pH below ______,which corrode phosphates to cause tooth decay.
21. ________________________________ produced in stomach helps in digestion of food.
22. The indigestion problems can be controlled by adding basic substances called _________________.
23. Red ants are known as _____________in Greek.
24. Acid + metal → salt + _________
25. Red ants on secrete acidic sting of ____________________________that causes itching and irritation.
26. Na2CO3(s) + 2HCl(aq) → __________ + _________ + ___________
27. CuO + __________ → CuCl2 + ____________
28. CO2 is a ______________________________ oxide.
29. The reaction between acid and base to form salt and water is termed as _________________.
30. The base that dissolve in water is known as ________________.
31. Seperation of HCl into H+ and Cl- ions is possible in presence of water in process termed as______________.
32. Hydrogen ions combine with water and form ________________________.
33. The hydroxyl ions is symbolically expressed as _______.
34. Impure sodium chloride is ____________ in colour.
35. Impure sodium chloride is known as _______________.
36. Purified sodium chloride is ___________compound.
37. 10% sodium chloride it is termed as ___________.
38. 2NaCl(aq) + 2H2O(l) → _____________ + __________ + ____________
39. When salt is heated at high temperature, the molten state is also termed as ____________ state.
40. The formula for sodium hydrogen carbonate is ______________.
41. Na2CO3 plays important role in making water soft and ________________.
42. The compound having molecular formula _________________is one of content of fire extinguishers.
43. Presence of _______________and __________________of Ca and Mg make water hard.
44. When compound X is added to well water in rainy season then we get stong odour of Y, then X and Y are _____________________ and _________________________ respectively.
45. _________________ is an organic solvent which is used as anaesthetic.
46. _______________________________is known as chloride of lime.
47. Compound P is is used in preparation of chloroform and when P comes in contact with Q then we get chlorine gas, then molecular formula of P and Q are____________and ______respectively.
48. The sodium bicarbonate on decomposition forms sodium carbonate having molecular formula ________________________.
49. Sodium carbonate is ___________ in nature.
50. Na2CO3 + 2HCl → _____________ + __________ + __________
51. _____________________________is used to refine petroleum.
52. On heating or on exposure to air, salts lose water of crystallization and turn into substance which is termed as ___________________substance.
53. When oils or fats are boiled with aqueous solution of NaOH, then sodium salt of _______________________ obtained, as soap
54. The process of alkaline ___________________ of oils and fats is known as saponification.
55. The formula for ammonium hydroxide is ______________.
56. The pH of Palak extract is ____________________.
57. The pH of mixture of ginger juice and honey is ____________________.
58. The pH of aerated drink is ____________________.
59. In pH, p stands for ____________.
60. The strength of base is represented by __________.
61. When bases in aqueous solution give more number of _______ions they are termed as strong bases.
62. If concentration of OH- ions is increased then the pH will ________________.
63. Nettle is a herbaceous plant having _________________hair.
64. When copper reacts with hydrochloric acid in presence of air then we get a water along with salt having molecular formula _________.
65. When sodium hydroxide is poured over Al ribbon we get hydrogen gas and a compound having named ___________________________________.
66. When aluminium carbonate is reacted with dilute HCl we get _________gas.
67. When baking soda is treated with dilute HCl then we get compound named _________________along with water and CO2 gas.
68. The molecular formula of red oxide is ____________.
69. The pH value of common salt is ________________.
70. The pH value of soap is ________________.
71. The pH value of washing soda is ________________.
72. The pH value of baking soda is ________________.
73. The pH value of bleaching powder is ________________.
74. Anhydrous copper sulphate is ____________in colour.
75. The name of compound with formula Na2S2O3.7H2O is ___________________________________.
76. Metal oxide + ____________ → salt + water
77. When CO2 is passed through lime water , it turns lime water _____________.
78. pH helps in measuring ________________ion concentration in solutions.
79. Honey bee sting causes ______________sensation.
80. Red oxide is used as ____________before painting.
81. Reactivity of base with non-metallic oxide is a ______________________________reaction.
82. Glowing of bulb indicates flow of ____________________in the solution.
83. When electricity is passed through solution of sodium chloride ,then _____gas is liberated at anode.
84. When tested with litmus , NaHCO3 turns __________litmus __________.
85. Bleaching powder has __________colour.
86. Bleaching powder is used as ______________agent in many chemical reactions.
87. When tested with litmus , sodium carbonate turns __________litmus __________.
88. Food particles are degraded by bacteria in mouth to produce acid with pH below ____.
89. Salt of strong acid and weak base are ____________in nature.
1. In Latin, _____________ means sour.
2. Substances which are __________ to taste are Bases.
3. The acidic and basic nature of compounds can also be indicated by some natural as chemical substances called as _______________.
4. Litmus paper or solution is obtained from a plant named _________________.
5. ____________turn red litmus blue.
6. Certain substances whose odour changes in acidic or basic medium are called as ______________indicators.
7. Eosin is a _______________indicator.
8. Beet root is a _______________indicator.
9. ___________________of several indicators is known as universal indicator.
10. Bases contain _______________ions.
11. In German language, _______________means strength.
12. At the value 7, the solution is _____________.
13. When acids in aqueous give more number of H+ are termed as ______________________.
14. Lime water with butter having ________________________ can cure acidity.
15. Based on principle of _________________, like ‘dissolves like’, acidity can be controlled by acidic substance mixed with basic substance.
16. Jaggery is used with _______________while cooking to maintain pH of our body.
17. When pH value is between 7 to 14 , the nature of solution becomes _________ /____________.
18. The human body works within _____ range of 7.35 to 7.45.
19. Tooth enamel is made up of hard matter named __________________________________.
20. Food particles are degraded by bacteria in the mouth to produce pH below ______,which corrode phosphates to cause tooth decay.
21. ________________________________ produced in stomach helps in digestion of food.
22. The indigestion problems can be controlled by adding basic substances called _________________.
23. Red ants are known as _____________in Greek.
24. Acid + metal → salt + _________
25. Red ants on secrete acidic sting of ____________________________that causes itching and irritation.
26. Na2CO3(s) + 2HCl(aq) → __________ + _________ + ___________
27. CuO + __________ → CuCl2 + ____________
28. CO2 is a ______________________________ oxide.
29. The reaction between acid and base to form salt and water is termed as _________________.
30. The base that dissolve in water is known as ________________.
31. Seperation of HCl into H+ and Cl- ions is possible in presence of water in process termed as______________.
32. Hydrogen ions combine with water and form ________________________.
33. The hydroxyl ions is symbolically expressed as _______.
34. Impure sodium chloride is ____________ in colour.
35. Impure sodium chloride is known as _______________.
36. Purified sodium chloride is ___________compound.
37. 10% sodium chloride it is termed as ___________.
38. 2NaCl(aq) + 2H2O(l) → _____________ + __________ + ____________
39. When salt is heated at high temperature, the molten state is also termed as ____________ state.
40. The formula for sodium hydrogen carbonate is ______________.
41. Na2CO3 plays important role in making water soft and ________________.
42. The compound having molecular formula _________________is one of content of fire extinguishers.
43. Presence of _______________and __________________of Ca and Mg make water hard.
44. When compound X is added to well water in rainy season then we get stong odour of Y, then X and Y are _____________________ and _________________________ respectively.
45. _________________ is an organic solvent which is used as anaesthetic.
46. _______________________________is known as chloride of lime.
47. Compound P is is used in preparation of chloroform and when P comes in contact with Q then we get chlorine gas, then molecular formula of P and Q are____________and ______respectively.
48. The sodium bicarbonate on decomposition forms sodium carbonate having molecular formula ________________________.
49. Sodium carbonate is ___________ in nature.
50. Na2CO3 + 2HCl → _____________ + __________ + __________
51. _____________________________is used to refine petroleum.
52. On heating or on exposure to air, salts lose water of crystallization and turn into substance which is termed as ___________________substance.
53. When oils or fats are boiled with aqueous solution of NaOH, then sodium salt of _______________________ obtained, as soap
54. The process of alkaline ___________________ of oils and fats is known as saponification.
55. The formula for ammonium hydroxide is ______________.
56. The pH of Palak extract is ____________________.
57. The pH of mixture of ginger juice and honey is ____________________.
58. The pH of aerated drink is ____________________.
59. In pH, p stands for ____________.
60. The strength of base is represented by __________.
61. When bases in aqueous solution give more number of _______ions they are termed as strong bases.
62. If concentration of OH- ions is increased then the pH will ________________.
63. Nettle is a herbaceous plant having _________________hair.
64. When copper reacts with hydrochloric acid in presence of air then we get a water along with salt having molecular formula _________.
65. When sodium hydroxide is poured over Al ribbon we get hydrogen gas and a compound having named ___________________________________.
66. When aluminium carbonate is reacted with dilute HCl we get _________gas.
67. When baking soda is treated with dilute HCl then we get compound named _________________along with water and CO2 gas.
68. The molecular formula of red oxide is ____________.
69. The pH value of common salt is ________________.
70. The pH value of soap is ________________.
71. The pH value of washing soda is ________________.
72. The pH value of baking soda is ________________.
73. The pH value of bleaching powder is ________________.
74. Anhydrous copper sulphate is ____________in colour.
75. The name of compound with formula Na2S2O3.7H2O is ___________________________________.
76. Metal oxide + ____________ → salt + water
77. When CO2 is passed through lime water , it turns lime water _____________.
78. pH helps in measuring ________________ion concentration in solutions.
79. Honey bee sting causes ______________sensation.
80. Red oxide is used as ____________before painting.
81. Reactivity of base with non-metallic oxide is a ______________________________reaction.
82. Glowing of bulb indicates flow of ____________________in the solution.
83. When electricity is passed through solution of sodium chloride ,then _____gas is liberated at anode.
84. When tested with litmus , NaHCO3 turns __________litmus __________.
85. Bleaching powder has __________colour.
86. Bleaching powder is used as ______________agent in many chemical reactions.
87. When tested with litmus , sodium carbonate turns __________litmus __________.
88. Food particles are degraded by bacteria in mouth to produce acid with pH below ____.
89. Salt of strong acid and weak base are ____________in nature.
9 90.
Washing soda is used in washing
clothes as ____________________agent.
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