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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
85. An aqueous solution of acetone contain 29%acetone by weight. Mole percentage ofacetone in th is solution is(1) 9.09%(2) 5.55%(3) 4.04%(4) 11.25%chow |
| Answer» 85. An aqueous solution of acetone contain 29%acetone by weight. Mole percentage ofacetone in th is solution is(1) 9.09%(2) 5.55%(3) 4.04%(4) 11.25%chow | |
| 52. |
When two moles of [Co(NH3)5Cl]Cl2 is treated with excess silver nitrate solution, the number of moles of silver chloride formed is |
| Answer» When two moles of [Co(NH3)5Cl]Cl2 is treated with excess silver nitrate solution, the number of moles of silver chloride formed is | |
| 53. |
Find out the wrong statements and write them in their correct form. (a) We can survive for some time without air but we cannot survive even for a few minutes without food.(b) A brick kiln emits a lot of smoke and other harmful gases causing air pollution.(c) Carbon monoxide is produced by the complete burning of fuels such as coal, petrol, diesel. (d) Chlorination is a commonly used chemical method for killing germs in the water.(e) Water that is suitable for drinking is called soft water |
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Answer» Find out the wrong statements and write them in their correct form. (a) We can survive for some time without air but we cannot survive even for a few minutes without food. (b) A brick kiln emits a lot of smoke and other harmful gases causing air pollution. (c) Carbon monoxide is produced by the complete burning of fuels such as coal, petrol, diesel. (d) Chlorination is a commonly used chemical method for killing germs in the water. (e) Water that is suitable for drinking is called soft water |
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| 54. |
Name the appliances in your home that are used for heating purpose and cooling purpose. |
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Answer» Name the appliances in your home that are used for heating purpose and cooling purpose. |
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| 55. |
Heat transfer coefficients for free convection in gases, forced convection in gases and vapours, and for boiling water lie, respectively, in the range of |
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Answer» Heat transfer coefficients for free convection in gases, forced convection in gases and vapours, and for boiling water lie, respectively, in the range of |
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| 56. |
Jute is one of the cheapest natural fibres. True or false? |
| Answer» Jute is one of the cheapest natural fibres. True or false? | |
| 57. |
In the following list, circle the one which is not matter.air, water, pen, balloon, feelings, petrol |
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Answer» In the following list, circle the one which is not matter. air, water, pen, balloon, feelings, petrol |
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| 58. |
Some words (underlined) in the following sentences are jumbled up. Write them in their correct form.(a) Seldie is a combustible substance.(b) Slags is a non-combustible material.(c) Chittsmack does not burn by itself.(d) Some substances on combustion produce thea and mafel.(e) The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ficalroic value. |
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Answer» Some words (underlined) in the following sentences are jumbled up. Write them in their correct form. (a) Seldie is a combustible substance. (b) Slags is a non-combustible material. (c) Chittsmack does not burn by itself. (d) Some substances on combustion produce thea and mafel. (e) The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ficalroic value. |
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| 59. |
Why solids have active mass 1? |
| Answer» Why solids have active mass 1? | |
| 60. |
in naphthalene the constituent molecules are held by |
| Answer» in naphthalene the constituent molecules are held by | |
| 61. |
__________ is the cheapest natural fibre |
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Answer» __________ is the cheapest natural fibre |
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| 62. |
The husk can be removed from flour by the process of : |
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Answer» The husk can be removed from flour by the process of : |
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| 63. |
Breaking of a glass tumbler and burning of paper are changes in which we cannot get back the original substances. What is the difference between these two changes? |
| Answer» Breaking of a glass tumbler and burning of paper are changes in which we cannot get back the original substances. What is the difference between these two changes? | |
| 64. |
What is diffusion? Give an example. |
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Answer» What is diffusion? Give an example. |
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| 65. |
for an isobaric process the ratio of △ Q (the amount of heat supplied ) to the △ W(the work dne by the gas ) γ=Cp/Cv |
| Answer» for an isobaric process the ratio of △ Q (the amount of heat supplied ) to the △ W(the work dne by the gas ) γ=Cp/Cv | |
| 66. |
Do you like reading story books? |
| Answer» Do you like reading story books? | |
| 67. |
Arrange the following substances in increasing order of forces of attraction between the particles— water, sugar, oxygen. |
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Answer» Arrange the following substances in increasing order of forces of attraction between the particles— water, sugar, oxygen. |
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| 68. |
Change the given sentence to the passive voice. Dinesh was tidying his room when the call came. |
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Answer» Change the given sentence to the passive voice. Dinesh was tidying his room when the call came. |
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| 69. |
A block of wood was placed in the path of light. It completely blocked the light to form a shadow. This is because wood block is ____. |
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Answer» A block of wood was placed in the path of light. It completely blocked the light to form a shadow. This is because wood block is ____. |
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| 70. |
What is rainwater harvesting? What is the need of rainwater harvesting? Mention any four rainwater harvesting structures. |
| Answer» What is rainwater harvesting? What is the need of rainwater harvesting? Mention any four rainwater harvesting structures. | |
| 71. |
1) Explain physical and chemical changes are useful in day to day life |
| Answer» 1) Explain physical and chemical changes are useful in day to day life | |
| 72. |
Question 1Differentiate between homogeneous and heterogeneous mixtures with examples. |
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Answer» Question 1 Differentiate between homogeneous and heterogeneous mixtures with examples. |
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| 73. |
Why do liquids and gases take the shape of their container? |
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Answer» Why do liquids and gases take the shape of their container? |
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| 74. |
Question 4 Boojho found a bag containing the following materials: (i) Mirror (ii) Paper stained with oil (iii) Magnet (iv) Glass spectacles Help Boojho in finding out the material(s) which is/are opaque. (a) Only (i) (b) Only (iv) (c) (i) and (iii) (d) (i) and (iv) |
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Answer» Question 4 Boojho found a bag containing the following materials: (i) Mirror (ii) Paper stained with oil (iii) Magnet (iv) Glass spectacles Help Boojho in finding out the material(s) which is/are opaque. (a) Only (i) (b) Only (iv) (c) (i) and (iii) (d) (i) and (iv) |
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| 75. |
During of a candle is both of physical and chemical change/ justify |
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Answer» During of a candle is both of physical and chemical change/ justify |
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| 76. |
Choose the option that depicts the process of spinning correctly. |
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Answer» Choose the option that depicts the process of spinning correctly. |
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| 77. |
Which of the following fibres is also known as artificial silk ? |
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Answer» Which of the following fibres is also known as artificial silk ? |
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| 78. |
Which method is used to separate tea leaves from tea? |
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Answer» Which method is used to separate tea leaves from tea? |
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| 79. |
Question 3(i) What do you mean by evaporation?(ii) Why do we see water droplets on the outer surface of a glass containing ice-cold water? |
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Answer» Question 3 (i) What do you mean by evaporation? (ii) Why do we see water droplets on the outer surface of a glass containing ice-cold water? |
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| 80. |
Question 3 (b) Discuss the effects of deforestation on the environment. |
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Answer» Question 3 (b) Discuss the effects of deforestation on the environment. |
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| 81. |
At hydroelectric power plant, electricity is generated from: |
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Answer» At hydroelectric power plant, electricity is generated from: |
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| 82. |
Give two effects of each of the following air pollutants. [5 MARKS] i. Carbon monoxide ii. Sulphur dioxide iii. Nitrogen oxides iv. Ground level ozone v. particulate matter |
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Answer» Give two effects of each of the following air pollutants. [5 MARKS] i. Carbon monoxide ii. Sulphur dioxide iii. Nitrogen oxides iv. Ground level ozone v. particulate matter |
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| 83. |
Explain the technique used to separate the following mixtures: Sugar from water Stone and rice |
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Answer» Explain the technique used to separate the following mixtures:
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| 84. |
A commonly used chemical for loading is(a) hydrogen.(b) alum.(c) sulphur.(d) common salt. |
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Answer» A commonly used chemical for loading is (a) hydrogen. (b) alum. (c) sulphur. (d) common salt. |
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| 85. |
Which of the following is/are a mixture? |
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Answer» Which of the following is/are a mixture? |
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| 86. |
what is mwaning of precipitation |
| Answer» what is mwaning of precipitation | |
| 87. |
Graphite has a shiny appearance so why it is considered as a non- metal? |
| Answer» Graphite has a shiny appearance so why it is considered as a non- metal? | |
| 88. |
Question 11The system of irrigation wherein water is supplied drop by drop near the roots of plants is called(a) pulley system(b) drip system(c) sprinkler system(d) lever system |
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Answer» Question 11 The system of irrigation wherein water is supplied drop by drop near the roots of plants is called (a) pulley system (b) drip system (c) sprinkler system (d) lever system |
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| 89. |
Long chimneys in factories are to ________. |
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Answer» Long chimneys in factories are to ________. |
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| 90. |
When does a drought occur? |
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Answer» When does a drought occur? |
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| 91. |
Fire belongs to which state of matter or energy |
| Answer» Fire belongs to which state of matter or energy | |
| 92. |
13. The hydrated salt Na2So4.nH2O undergoes 50.3%loss in weight on heating and become anhydrous. The value of n will be? (1) 2 (2) 5 (3) 7 (4) 10 |
| Answer» 13. The hydrated salt Na2So4.nH2O undergoes 50.3%loss in weight on heating and become anhydrous. The value of n will be? (1) 2 (2) 5 (3) 7 (4) 10 | |
| 93. |
You measure the length of a brass rod on a hot July afternoon and a cool January evening, using the same aluminium scale. To your surprise, you find that the rod length is measured to be smaller on the summer day! Which of the following could explain the above phenomenon? |
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Answer» You measure the length of a brass rod on a hot July afternoon and a cool January evening, using the same aluminium scale. To your surprise, you find that the rod length is measured to be smaller on the summer day! Which of the following could explain the above phenomenon? |
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| 94. |
What are the different states of matter in which water exists? Discuss. |
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Answer» What are the different states of matter in which water exists? Discuss. |
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| 95. |
Read the first and second stanzas of the poem again. Note the following phrases.Corn growing, people working or dancing, wind sighing, rain falling, a singer chantingThese could be written as Corn that is growingPeople who are working or dancingCan you rewrite the other phrases like this? Why do you think the poet uses the shorter phrases? |
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Answer» Read the first and second stanzas of the poem again. Note the following phrases. Corn growing, people working or dancing, wind sighing, rain falling, a singer chanting These could be written as
Can you rewrite the other phrases like this? Why do you think the poet uses the shorter phrases? |
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| 96. |
If A is % greater than B, by what% is B less than A |
| Answer» If A is % greater than B, by what% is B less than A | |
| 97. |
Which of the following method converts water vapour back to water? |
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Answer» Which of the following method converts water vapour back to water? |
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| 98. |
Nommez :1. Deux fromages français.2. Deux vins français. |
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Answer» Nommez : 1. Deux fromages français. 2. Deux vins français. |
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| 99. |
Which of the following is reversible change? |
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Answer» Which of the following is reversible change? |
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| 100. |
∫Cos3x Cos5x Cos7x dx=? |
| Answer» ∫Cos3x Cos5x Cos7x dx=? | |