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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.
| 4351. |
Give reasons for the following : LPG is a better domestic fuel than wood. |
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Answer» Give reasons for the following : LPG is a better domestic fuel than wood. |
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| 4352. |
Shreya's father got a transfer from Lucknow to Goa. When Shreya started living in goa she observed that all her bangles made up of metals were getting a layer of brown coating. This layer of brown coating is due to a process called ___ . |
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Answer» Shreya's father got a transfer from Lucknow to Goa. When Shreya started living in goa she observed that all her bangles made up of metals were getting a layer of brown coating. This layer of brown coating is due to a process called |
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| 4353. |
Why hydrogen is still not considered as alternative to conventional fuel? |
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Answer» Why hydrogen is still not considered as alternative to conventional fuel? |
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| 4354. |
Which of the following gas is produced when iron reacts with dilute sulphuric acid? |
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Answer» Which of the following gas is produced when iron reacts with dilute sulphuric acid? |
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| 4355. |
What material or polymer is used to make our swimsuit and what are features that make it perfect for that fabric |
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Answer» What material or polymer is used to make our swimsuit and what are features that make it perfect for that fabric |
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| 4356. |
What are the advantages of using Petroleum |
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Answer» What are the advantages of using Petroleum |
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| 4357. |
How to find ionization energy of different elements ? |
| Answer» How to find ionization energy of different elements ? | |
| 4358. |
Question 6 (a) Give reasons for the following. Aluminium foils are used to wrap food items. |
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Answer» Question 6 (a) Give reasons for the following. Aluminium foils are used to wrap food items. |
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| 4359. |
In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote: H2+2Cl→2 HCl The teacher marked the answer wrong. Why? |
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Answer» In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote: |
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| 4360. |
An element X has 19 electrons in it's ground state. Which group and period does this element belong to? |
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Answer» An element X has 19 electrons in it's ground state. Which group and period does this element belong to? |
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| 4361. |
What is the empirical formula of C4H8O2? |
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Answer» What is the empirical formula of C4H8O2? |
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| 4362. |
Which non-metal is highly essential for the existence of life? |
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Answer» Which non-metal is highly essential for the existence of life? |
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| 4363. |
A synthetic fiber classified as a Polyester |
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Answer» A synthetic fiber classified as a Polyester |
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| 4364. |
___ combustion is a reaction in which a large amount of heat and light are produced in a very short time. |
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Answer» |
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| 4365. |
Why does an atom does not react if it has with 8 electrons in 3rd energy level like Argon gas? |
| Answer» Why does an atom does not react if it has with 8 electrons in 3rd energy level like Argon gas? | |
| 4366. |
What are the reactants used to make polyester? |
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Answer» What are the reactants used to make polyester? |
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| 4367. |
what is oxidation reaction an redicution reaction give one example each ?/// |
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Answer» what is oxidation reaction an redicution reaction give one example each ?/// |
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| 4368. |
(a) Define catalyst. (b) What are (i) positive catalysts and (ii) negative cata lysts ? Support your answer wit h one example for each of them. (c) Name three biochemical catalyst found in the human body. |
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Answer» (a) Define catalyst. (b) What are (i) positive catalysts and (ii) negative cata lysts ? Support your answer wit h one example for each of them. (c) Name three biochemical catalyst found in the human body. |
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| 4369. |
What is air? [1 MARK] |
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Answer» What is air? [1 MARK] |
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| 4370. |
A metal sphere connected by a string is dipped in a liquid of density ρ as shown in the figure. The pressure at the bottom of the vessel will be (p0 = atmospheric pressure) |
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Answer» A metal sphere connected by a string is dipped in a liquid of density ρ as shown in the figure. The pressure at the bottom of the vessel will be (p0 = atmospheric pressure) |
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| 4371. |
Who believed that all kinds of matter are made up of 5 elements? |
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Answer» Who believed that all kinds of matter are made up of 5 elements? |
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| 4372. |
What is difference between metals and non metals at atomic/microscopic level? |
| Answer» What is difference between metals and non metals at atomic/microscopic level? | |
| 4373. |
What happens when oil is mixed with water at higher temperature |
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Answer» What happens when oil is mixed with water at higher temperature |
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| 4374. |
Does natural fibres made up of polymers? |
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Answer» Does natural fibres made up of polymers? |
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| 4375. |
Incomplete combustion of carbon based fuels like coal, wood causes: |
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Answer» Incomplete combustion of carbon based fuels like coal, wood causes: |
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| 4376. |
What is nylon ? State the important properties of nylon. |
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Answer» What is nylon ? State the important properties of nylon. |
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| 4377. |
What is the shorthand representation of an element? |
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Answer» What is the shorthand representation of an element? |
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| 4378. |
Why life began in water and not land? |
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Answer» Why life began in water and not land? |
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| 4379. |
The metal other than aluminium present in both magnalium and duralumin is: |
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Answer» The metal other than aluminium present in both magnalium and duralumin is: |
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| 4380. |
Identify the incorrect statement in the following? |
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Answer» Identify the incorrect statement in the following? |
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| 4381. |
What properties of nylon make it an ideal material for making parachutes? Give two reasons. |
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Answer» What properties of nylon make it an ideal material for making parachutes? Give two reasons. |
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| 4382. |
As a car uses up its fuel, the products given out from exhaust comprise |
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Answer» As a car uses up its fuel, the products given out from exhaust comprise |
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| 4383. |
For the chemical equation given below, what is the amount of methane required to produce 72 g of water? CH4(g)+2O2(g)→CO2(g)+2H2O(l) |
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Answer» For the chemical equation given below, what is the amount of methane required to produce 72 g of water? |
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| 4384. |
Excavated dams are made by scooping out soil to make large shallow pits. [3 MARKS] |
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Answer» Excavated dams are made by scooping out soil to make large shallow pits. [3 MARKS] |
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| 4385. |
Potassium is not used for preparation of hydrogen from water . Why? |
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Answer» Potassium is not used for preparation of hydrogen from water . Why? |
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| 4386. |
The product formed when sulphur reacts with oxygen is: |
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Answer» The product formed when sulphur reacts with oxygen is: |
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| 4387. |
___ protocol is an agreement reached by many countries for protection against global warming. |
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Answer» |
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| 4388. |
State whether matter is continuous or particulate? |
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Answer» State whether matter is continuous or particulate? |
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| 4389. |
Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide |
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Answer» Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide |
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| 4390. |
In an experiment, 2 g of Nitrogen gas reacts with 6 g of Hydrogen to form 8 g of Ammonia. Then when 2 g of Nitrogen reacts with 12 g of Hydrogen, then what mass of Ammonia will be produced? |
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Answer» In an experiment, 2 g of Nitrogen gas reacts with 6 g of Hydrogen to form 8 g of Ammonia. Then when 2 g of Nitrogen reacts with 12 g of Hydrogen, then what mass of Ammonia will be produced? |
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| 4391. |
What are the gases formed during lightning? |
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Answer» What are the gases formed during lightning? |
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| 4392. |
alloy used for multistorey building |
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Answer» alloy used for multistorey building |
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| 4393. |
What is the role of catalyst in the activation energy of a chemical reaction? |
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Answer» What is the role of catalyst in the activation energy of a chemical reaction? |
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| 4394. |
We need to balance the chemical reaction because: |
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Answer» We need to balance the chemical reaction because: |
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| 4395. |
A boy compared the flow of honey with water and found that honey does not flow as easily as compared to water. Which of the following is/are correct for this observation? |
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Answer» A boy compared the flow of honey with water and found that honey does not flow as easily as compared to water. Which of the following is/are correct for this observation? |
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| 4396. |
State the role of a green house in growing plants. |
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Answer» State the role of a green house in growing plants. |
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| 4397. |
If a metallic oxide is showing the basic formula of MO, then to which group the metal M belongs to? |
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Answer» If a metallic oxide is showing the basic formula of MO, then to which group the metal M belongs to? |
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| 4398. |
Which product of coal is used as a reducing agent in the extraction of metals ? |
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Answer» Which product of coal is used as a reducing agent in the extraction of metals ? |
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| 4399. |
Which of the following react with oxygen at room temperature to form their acidic oxide? |
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Answer» Which of the following react with oxygen at room temperature to form their acidic oxide? |
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| 4400. |
Which of the following is one of the characteristics of a good fuel? |
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Answer» Which of the following is one of the characteristics of a good fuel? |
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