InterviewSolution
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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.
| 3751. |
People use a variety of methods to wash clothes, Usually after adding the soap, they 'beat' the clothes ona stone or beat it with a paddle scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessaryto be clean clothes? |
| Answer» Solution :A soap molecule has two parts NAMELY hydrophobic and hydrophilic.With the help of these it attacks to the GREASE or dirt particle and forms a cluster called micelle.These micelles remain suspended as a COLLOID .To remove these micelles,it is necessary to agitate clothes. | |
| 3754. |
Pass the gas produced through freshly prepared lime water. What do you observe ? |
| Answer» Solution :When the EVOLVED GAS is passed through freshly prepared lime water, it TURNS MILKY DUE to the formation of insoluble calcium hydroxide. | |
| 3755. |
Part of the flower that devlops into fruit and part the seed that devops into root respectively are |
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Answer» OVARY and pumule |
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| 3756. |
Partial neutralizationof a polybasic acid gives |
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Answer» ACID SALT |
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| 3757. |
Part of the flower that develops into seed that develops |
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Answer» OVARY and plumule |
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| 3758. |
Part of the flower that develops into fruit and part of the seed that develops into root respectively are |
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Answer» OVARY and plumule |
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| 3759. |
Parents are advised to discourage their children to eat chips and junk food. Why? |
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Answer» Solution :(a) Junk food makes a person obese. (b) They may suffer from LOSS of appetite ( c) They may DEVELOP the problems related to his/her physical or mental growth (d) It leads to wastage of money |
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| 3760. |
Pantane has the molecular formula C_5H_12.It has |
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Answer» 5 COVALENT BONDS |
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| 3761. |
Pairs of electrodes and their corresponding standard electrode potentials are given. Arrange the cells constructed by these electrodes in increasing order of emf values (1) Electrode rarr A, E^(@) = - 2.92 V and Electrode rarr B, E^(@) = - 2.71 V (2) Electrode rarr C, E^(@) = - 0.760 V and Electrode rarr D, E^(@) = -0.44 V (3) Electrode rarr B, E^(@) = - 2.71 and Electrode rarr D, E^(@) = -0.44 V (4) Electrode rarr A, E^(2) = -2.92 V and Electrode rarr C, E^(@) = -0.76 V |
| Answer» Solution :`{:((i), "Electrode"- A"," E^(@) = - 2.92 V and ),(,"Electrode " - B"," E^(@) = -2.71 V),((II),"Electrode " - C"," E^(@) = - 0.760 V and),(,"Electrode" - D "," E^(@) = -0.44 V),((iii),"Electrode" - B"," E^(@) = -2.71 V and),(,"Electrode " - D"," E^(@) = -0.44 V),((iv),"Electrode " - A "," E^(@) = -2.92 V and),(,"Electrode " - C"," E^(@) = -0.76 V):}` | |
| 3762. |
Pairing of electron in an degenerate orbitals takes place only when the degenerate orbitals are filled with one eletron each |
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Answer» |
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| 3763. |
p' orbital has a nodal plane while 's' orbital has a nodal region . Elaborate with the help of a diagram |
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Answer» SOLUTION :(i) SHAPE of s-orbitals and p-orbiLals (ii) orientation of lobes ofp-orbitals and s orbitals in space (III) areas of zero probability of ELECTRON in s- and p-orbitals (iv) comparison of these areas of s-orbitals and p orbitals |
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| 3764. |
'p'-orbital hasanodal plane while's'-orbital hasa nodal region. Elaborate with the help of a diagram |
| Answer» Solution :Degenerate orbitals are orbitals having equal ener- gies belonging to same main energy LEVEL. Electrons can enter into any orbital. If an electron occupies one of the orbitals, the next electron NECESSARILY takes the same spin and enters into the other vacant orbital instead of pairing up with the electron in the lst orbital. The electrons always repel each other due to their same CHARGE. If they rotate around their axis in the same direction, they Will have similar magnetic moment and they will further repel each other and maintain maximum distance AMONG each other that gives RISE to the maximum stability | |
| 3765. |
A p-orbital can accommodate a maximum of electrons |
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Answer» 2 |
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| 3767. |
Oxygen is the most abundant element in both the Earth's crust and the human body. It exists as a mixture of three stable isotopes in nature as shown in Table. |
Answer» Solution :ISOTOPES of OXYGEN  The ATOMIC MASS of oxygen `=(15.9949xx0.99757)+(16.9991xx0,.00038)+(17.9992xx0.00205)` `="15.999 AMU."` |
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| 3776. |
What is the oxidation number of carbon in C_(3)O_(2) ( carbon suboxide ) ? |
| Answer» ANSWER :D | |
| 3780. |
Out of Zn and Cu vessel one will be more suitable to store 1 M HCl? Given E_(Zn^(2+)//Zn)^(theta)=-0.76V,E_(Cu^(2+)//Cu)^(theta)=+0.34V. |
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| 3781. |
Out of two elements A and B with mass number 2 and 235 respectively. Which one is suitable for making. a) A nuclear reactor b) A hydrogen bomb Name the nuclear reaction involved in each case, write one difference between the two types of nuclear reactions. |
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Answer» Solution : a) For a NUCLEAR reactor - element .B. with mass NUMBER 235 is suitable as a FUEL in nuclear reactor. b) For a hydrogen bomb - element .A. with mass number 2 is suitable for making the hydrogen bomb. The nuclear reaction involved in a) Nuclear reactor is nuclear fission reaction. b) Nuclear bomb is nuclear fusion reaction. Difference between fission and fusion. Fusion reaction RELEASES such greater energy with non- radioactive products than the energy released in fission reaction with radioactive products. |
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| 3782. |
Out of the two metals P and Q, P is less reactive than Q. Suggest an activity to arrange these metals in the order of their decreasing reactivity. Support your answer with a suitable chemical equation. |
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Answer» Solution :Activity : Metal Q is ADDED to SALT solution of P. Q being more reactive, displaces metal P from from its salt solution. CHEMICAL EQUATION : Metal Q + Salt solution of P `RARR` Salt solution of Q + Metal P. |
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| 3783. |
Out of the two elements, potassium and sodium, which one can lose electrons easily? Give reason for your answer. |
| Answer» Solution :In the Modern Periodic Table, potassium is placed below SODIUM in the same GROUP. Since TENDENCY to lose ELECTRONS increases down a group. potassium can lose electrons easily COMPARED to sodium. | |
| 3784. |
Out of the two elements X and Y which has a bigger atomic radius? (i) X has atomic number = 18 and atomic mass = 40. (ii) Y has atomic number = 20 and atomic mass = 40. |
| Answer» Solution :Electronic configuration of `X to 2, 8, 8 and Y to 2, 8, 8, 2.` Since X has only three electron shells while Y has four shells, Y has a bigger atomic RADIUS. | |
| 3785. |
Out of the elements X and Y, which has bigger atomic radius? Give reason to justify your answer. (i) X has atomic number 18 and atomic mass 40. (ii) Y has atomic number 20 and atomic mass 40. |
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Answer» SOLUTION :Radius of Y is BIGGER than that of X. In .X. the number of SHELLS is THREE while in Y it is four. |
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| 3786. |
Out of soap and detergent, which is more effective? Why? The use of detergent has increased over soap. Why? |
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Answer» Solution :Detergent is more effective. Soap reacts with the `Ca^(2+)` and `Mg^(2+)` ions present in hard WATER and gives PRECIPITATES. THUS, soap is wasted. Detergent does not give precipitates with such ions but gives soluble salts. Due to this reason detergent is not wasted and so LESS quantity of detergent is enough for cleaning. Thus, the USE of detergent has increased over soap. |
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| 3787. |
Out of Li, C and N, which forms the most basic oxide and which forms the most acidic oxide? |
| Answer» SOLUTION :LITHIUM FORMS the most BASIC oxide as it is a metal and nitrogen forms the most ACIDIC oxide as it is a non-metal. | |
| 3788. |
Out of Li and K which has strong metallic character? |
| Answer» Solution : K has more metallic CHARACTER because it is larger in SIZE and can lose ELECTRON EASILY. | |
| 3789. |
Out of HCl and CH_(3)COOH,which one Is weak is weak acid and why?Describe an activity to support your anser? |
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Answer» Solution :ACETIC acid `(CH_(3)COOH)` is a weaker acid because it does not dissocitated completelyinto its ions in aqueous solutio. Activity:Add zinc metal in HCl and `CH_(3)COOH` respectively.The HYDROGEN gas will be evolved faster in HCl and SLOWLY in `CH_(3)COOH` It shows acetic acid is a weak acid. Alternative method: If we use PH will be dark RED in HCl and light red in `CH_(3)COOH` which shows HCl is a strong acid and `CH_(3)COOH` is a weak acid. |
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| 3790. |
Out of Döbereiner's triads and Newlands' octaves, which classification is better? Why? |
| Answer» SOLUTION :Even though both Döbereiner.s triads and Newlands. OCTAVES are erratic and INCOMPLETE, Newlands. octaves are better since more number of ELEMENTS COULD be classified into octaves. | |
| 3791. |
Our Mobilephonegetsenergyfromits ____ battery bychemicalreactions . |
| Answer» SOLUTION :LITHIUM ION | |
| 3792. |
ous' acid of a non-metal 'X' has 2 'O' atoms. Per acid of the same non-metal has the formula ________ . |
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Answer» |
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| 3793. |
Our body metabolism is carried out by mean of …….secreted in our stomach. |
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Answer» SULPHURIC acid |
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| 3795. |
Our body metabolism us carried out by mean of sulphuric acid secreted in our stomach. |
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Answer» Solution :FALSE Correct STATEMENT:Out body metabolism is CARRIED out by means of hydrochloric acid secreted in our STOMACH. |
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| 3796. |
Ourbodyworkswithinthe pHrangeof _______to_______. |
| Answer» SOLUTION :`7.0,7.8` | |
| 3797. |
Organic compounds have a high molecular weight and a simple structure. |
| Answer» SOLUTION :ORGANIC COMPOUNDS have a high MOLECULAR weight and a complex structure. | |
| 3799. |
Organic compounds are………………in nature. |
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Answer» FLAMMABLE |
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| 3800. |
Organic compounds are non conductors of electricity because they |
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Answer» are insoluble in water |
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