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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.
| 4851. |
Which is the major component of CNG ? (a) ethane (b) propane (c) methane (d) butane |
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Answer» Which is the major component of CNG ? (a) ethane (b) propane (c) methane (d) butane |
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| 4852. |
Which of the following is true about the preparation of hydrogen gas? |
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Answer» Which of the following is true about the preparation of hydrogen gas? |
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| 4853. |
A flame is formed during burning of a substance due to: |
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Answer» A flame is formed during burning of a substance due to: |
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| 4854. |
Bromine gas (Br2) reacts with sodium carbonate (Na2CO3) in aqueous solution and gives sodium bromide (NaBr), sodium bromate (NaBrO3) and carbon-dioxide gas. How many sodium bromide molecules are obtained in the balanced chemical equation ? [2 MARKS] |
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Answer» Bromine gas (Br2) reacts with sodium carbonate (Na2CO3) in aqueous solution and gives sodium bromide (NaBr), sodium bromate (NaBrO3) and carbon-dioxide gas. How many sodium bromide molecules are obtained in the balanced chemical equation ? [2 MARKS] |
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| 4855. |
Aqua-regia was so named by alchemists because it can dissolve noble metals like gold and platinum. Which of the following represents the correct composition of Aqua-regia? |
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Answer» Aqua-regia was so named by alchemists because it can dissolve noble metals like gold and platinum. Which of the following represents the correct composition of Aqua-regia? |
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| 4856. |
What type of waste do you see in the picture? |
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Answer» What type of waste do you see in the picture?
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| 4857. |
What do we understand by spontaneous combustion? |
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Answer» What do we understand by spontaneous combustion? |
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| 4858. |
Large-scale deforestation leads to a decrease in the amount of gas A in the atmosphere whereas the amount of gas B increases. The increased amount of gas B in the atmosphere causes an effect C which leads to excessive heating of the earth and its atmosphere producing an undesirable phenomenon D. What are A, B, C and D? |
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Answer» Large-scale deforestation leads to a decrease in the amount of gas A in the atmosphere whereas the amount of gas B increases. The increased amount of gas B in the atmosphere causes an effect C which leads to excessive heating of the earth and its atmosphere producing an undesirable phenomenon D. What are A, B, C and D? |
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| 4859. |
Amalgamation refers to: |
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Answer» Amalgamation refers to: |
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| 4860. |
How can organisms living in the Marina trench live in the highest water pressure? |
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Answer» How can organisms living in the Marina trench live in the highest water pressure? |
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| 4861. |
What is metals |
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Answer» What is metals |
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| 4862. |
The gas used in the hydrogenation of vegetable oils in the presence of nickel as catalyst is |
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Answer» The gas used in the hydrogenation of vegetable oils in the presence of nickel as catalyst is |
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| 4863. |
The substances that loses the water of crystallization on exposure to dry air are called ________ substances. |
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Answer» The substances that loses the water of crystallization on exposure to dry air are called ________ substances. |
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| 4864. |
Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution? |
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Answer» Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution? |
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| 4865. |
Are all combustible substances fuels ? Justify your answer . |
| Answer» Are all combustible substances fuels ? Justify your answer . | |
| 4866. |
James Chadwick got Noble Prize for the discovery of____________. |
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Answer» James Chadwick got Noble Prize for the discovery of____________. |
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| 4867. |
Name the petroleum product which is commonly used for electric generators. |
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Answer» Name the petroleum product which is commonly used for electric generators. |
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| 4868. |
Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent? (a) carbon dioxide (b) nitrogen monoxide (c) carbon monoxide (d) sulphur dioxide |
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Answer» Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent? (a) carbon dioxide (b) nitrogen monoxide (c) carbon monoxide (d) sulphur dioxide |
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| 4869. |
Which of the following condition is necessary to perform destructive distillation? |
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Answer» Which of the following condition is necessary to perform destructive distillation? |
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| 4870. |
The temperature of oxyacetylene flame is about _________ and that of oxyhydrogen flame is approximately_________ . |
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Answer» The temperature of oxyacetylene flame is about _________ and that of oxyhydrogen flame is approximately_________ . |
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| 4871. |
The following table gives the steps we use in writing the formulae of compounds. What is the correct formula of sodium phosphate? |
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Answer» The following table gives the steps we use in writing the formulae of compounds. What is the correct formula of sodium phosphate? |
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| 4872. |
A fuel is not considered to be used on a day-to-day basis. The main reason could be: |
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Answer» A fuel is not considered to be used on a day-to-day basis. The main reason could be: |
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| 4873. |
If the clothes of a person working in the kitchen catch fire, then to extinguish the fire : (a) sand should be thrown over the burning clothes (b) water should be thrown over the burning clothes (c) polyester blanket should be used to cover the burning clothes (d) woollen blanket should be used to cover the burning clothes |
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Answer» If the clothes of a person working in the kitchen catch fire, then to extinguish the fire : (a) sand should be thrown over the burning clothes (b) water should be thrown over the burning clothes (c) polyester blanket should be used to cover the burning clothes (d) woollen blanket should be used to cover the burning clothes |
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| 4874. |
Please explain ebullition and how is vaporization different from evaporation |
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Answer» Please explain ebullition and how is vaporization different from evaporation |
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| 4875. |
what is limiting reagent? |
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Answer» what is limiting reagent? |
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| 4876. |
Gold : noble metal :: Helium : ________ |
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Answer» Gold : noble metal :: Helium : ________ |
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| 4877. |
Identify the material noun in the sentence. The customer preferred cotton while purchasing her saris from our shop. |
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Answer» Identify the material noun in the sentence. The customer preferred cotton while purchasing her saris from our shop. |
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| 4878. |
Sublimation is when a ___ changes directly to a ___. |
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Answer» Sublimation is when a |
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| 4879. |
A child came to see Aristotle and talked about dry leaves falling in his courtyard. The child was delighted with the beauty of nature. This made him think that what kind of change is this? |
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Answer» A child came to see Aristotle and talked about dry leaves falling in his courtyard. The child was delighted with the beauty of nature. This made him think that what kind of change is this? |
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| 4880. |
Give two applications of chromatography ? |
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Answer» Give two applications of chromatography ? |
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| 4881. |
Question 5 (c) Give reason. Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not. |
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Answer» Question 5 (c) Give reason. Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not. |
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| 4882. |
Plastic takes 500 year to decompose so why it is said to be non- biodegradable object , If it is decompose but take long time to take..? |
| Answer» Plastic takes 500 year to decompose so why it is said to be non- biodegradable object , If it is decompose but take long time to take..? | |
| 4883. |
Question 10 Give examples to show that plastics are non-corrosive in nature. |
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Answer» Question 10 |
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| 4884. |
Which of the following metals float after reacting with cold water? |
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Answer» Which of the following metals float after reacting with cold water? |
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| 4885. |
Why during laboratory preparation of hydrogen it is collected by downward displacement |
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Answer» Why during laboratory preparation of hydrogen it is collected by downward displacement |
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| 4886. |
S1: Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years. P. Records of the history of the world are contained in fossils. Q. Through the ages, plants have evolved from simple to more complex forms. R. First there were water plants then land plants appeared during the Paleozoic era. S. But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation. S6: The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography. ___ |
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Answer» S1: Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years. P. Records of the history of the world are contained in fossils. Q. Through the ages, plants have evolved from simple to more complex forms. R. First there were water plants then land plants appeared during the Paleozoic era. S. But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation. S6: The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography. |
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| 4887. |
How mars is formed?describe it's atmosphere? |
| Answer» How mars is formed?describe it's atmosphere? | |
| 4888. |
For acidic solution, the change observed in litmus paper is: |
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Answer» For acidic solution, the change observed in litmus paper is: |
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| 4889. |
In the process of extraction of metals, roasting could be utilised for: |
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Answer» In the process of extraction of metals, roasting could be utilised for: |
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| 4890. |
Identify the compound X in the following reaction? MnO2+4HCl heat−−−→ X+Cl2+2H2O |
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Answer» Identify the compound X in the following reaction? |
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| 4891. |
Define the following : (a) Carbonization (b) Adsorption (c) Bone black |
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Answer» Define the following : (a) Carbonization (b) Adsorption (c) Bone black |
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| 4892. |
Explain the different zones observed in a candle flame. Which one of them is the hottest zone? [5 MARKS] |
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Answer» Explain the different zones observed in a candle flame. Which one of them is the hottest zone? [5 MARKS] |
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| 4893. |
What is photochemical decomposition? Write one application of this example. |
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Answer» What is photochemical decomposition? Write one application of this example. |
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| 4894. |
Question 6 (b) Give reasons for the following. Immersion rods for heating liquids are made up of metallic substances. |
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Answer» Question 6 (b) Give reasons for the following. Immersion rods for heating liquids are made up of metallic substances. |
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| 4895. |
Write any three indicators and how they change in acidic medium? [3 MARKS] |
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Answer» Write any three indicators and how they change in acidic medium? [3 MARKS] |
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| 4896. |
What happens when zinc is added to a solution of iron sulphate? |
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Answer» What happens when zinc is added to a solution of iron sulphate? |
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| 4897. |
Explain the uses of different types of fibres. [5 MARKS] |
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Answer» Explain the uses of different types of fibres. [5 MARKS] |
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| 4898. |
Why is the nature of metallic oxides basic in nature? |
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Answer» Why is the nature of metallic oxides basic in nature? |
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| 4899. |
Write one use of algae? |
| Answer» Write one use of algae? | |
| 4900. |
What are the three states of matter ? Define each of them with two examples. |
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Answer» What are the three states of matter ? Define each of them with two examples. |
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