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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
Explain radicals |
| Answer» A radical is an atom, molecule, or ion that has an unpaired valence electron. | |
| 302. |
Find the no. Of molecules in 192 g of Sg |
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| 303. |
How many molecules are present in 8.5g of ammonia |
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| 304. |
What is stichometeric |
| Answer» Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change . | |
| 305. |
What is the difference between atomic weight and atomic mass? |
| Answer» Atomic mass is the mass of one atom of an element whereas atomic weight is the average mass of all the isotopes of that element | |
| 306. |
What is difference between d block and transition |
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| 307. |
What is differens between d block and trnsition |
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| 308. |
Mg+2 is smaller than O-²,although both have same electronic configuration. Why? |
| Answer» Mg+2 is smaller because it has 12 protons and 10 electrons and oxygen ion has 8 electrons and 10 electrons...<br>Ma | |
| 309. |
What is pure substance |
| Answer» | |
| 310. |
Which is good reference for chemistry and physics? |
| Answer» You can buy DC pandey for physics if you are preparing for NEET AIIMS or JEE<br>If you are preparing for NEET, AIIMS or JEE you can buy allens modules with ncert then solve as much questions as you can..<br>Ncert is the only book which gives full marks with short answers. | |
| 311. |
Avogadro law full explanation |
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| 312. |
Transition elements kya hota h? |
| Answer» Properties of transition elements include:have large charge/radius ratio;are hard and have high densities;have high melting and boiling points;form compounds which are often paramagnetic;show variable oxidation states;form coloured ions and compounds;form compounds with profound catalytic activity;<br>I want 2 know about transition elements<br>Elements in which the last electron enters the d-orbitals, are called d-block elements. These elements have general outer electronic configuration (n-1)d1-10 ns0-2.\xa0Zn, Cd and Hg which have general electronic configuration, (n-1) d10ns2\xa0do not show most of the properties of transition elements. d-orbitals in these elements are completely filled in the ground state as well as in their common oxidation states. Thus, on the basis of properties, all transition elements are d-block elements but on the basis of electronic configuration, all d- block elements are not transition elements. | |
| 313. |
Explain H2O is liquid at ordinary temperature While H2S is gas? |
| Answer» Due to greater electronegativity of O than S, H2O undergoes extensive intermolecular H-bonding. As a result, H2O is a liquid at room temperature. In contrast, H2S does not undergo H-bonding. It exists as discrete molecules which are held together by weak Van der Waals forces of attraction. To break these forces of attraction, only a small amount of energy is required. Therefore, H2S is a gas at room temperature. | |
| 314. |
Explain ionic compounds are generally soluble in polar solvent? |
| Answer» | |
| 315. |
Why d-block elements are called transition element ? |
| Answer» Elements in which the last electron enters the d-orbitals, are called d-block elements. These elements have general outer electronic configuration (n-1)d1-10 ns0-2.\xa0Zn, Cd and Hg which have general electronic configuration, (n-1) d10ns2\xa0do not show most of the properties of transition elements. d-orbitals in these elements are completely filled in the ground state as well as in their common oxidation states. Thus, on the basis of properties, all transition elements are d-block elements but on the basis of electronic configuration, all d- block elements are not transition elements. | |
| 316. |
Differentiate between molarity and molality?? |
| Answer» | |
| 317. |
If 170kg of NH3 is heated is excess of oxygen then the volome of H2O produced in 1st reaction STP is |
| Answer» | |
| 318. |
The mass of a photon with a wavelength equal to 1.54 ×10 power -8 |
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| 319. |
How many silver atoms are present in a piece of jewellery weighing 10.78 g? Ag=107.8 a.m.u |
| Answer» | |
| 320. |
why cation is smaller than its corresponding atom |
| Answer» Because cation nuclear efficency is more so by this way it is correspondent | |
| 321. |
24 g of Mg = gm atom |
| Answer» | |
| 322. |
Calculate the number of atoms present in 88.2 liters of hydrogen. |
| Answer» 5311.404×10²⁵ | |
| 323. |
How to calculate the mass of 0.5 mole of KNO3 |
| Answer» 47<br>No.of mole =mass÷molar mass =0.5 =mass÷101=0.5×101=50.5gThus, mass of KNO3=50.5g | |
| 324. |
How to balance the equation easily |
| Answer» One should always try hit and trial method first . This will help you to sharpen your mind for balancing all type of equations . | |
| 325. |
how would the bond lengths vary in di- carbon species C2,C2-,c22- |
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| 326. |
Can we see chemicals present in cosmetics using microscope |
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| 327. |
Why cathode rays produced only when the pressure of the gas inside the discharge tube is very low |
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| 328. |
What is electrostratic precipitator |
| Answer» An electrostatic precipitator (ESP) is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.<br>An electrostatic precipitator (ESP) is defined as a filtration device that is used to remove fine particles like smoke and fine dust from the flowing gas. It is the commonly used device for air pollution control. They are used in industries like steel plants, thermal energy plants.In the year 1907, chemistry professor Frederick Gardner Cottrell patented the first electrostatic precipitator that was used to collect sulphuric acid mist and lead oxide fumes that were emitted from various acid-making and smelting activities. | |
| 329. |
What is the difference between M and m? |
| Answer» M-molaritym-molality<br>M refers to the molarity whereas m refers to molality .<br>M is capital letter and m is small letter is the only diference | |
| 330. |
Define elements and mixtures |
| Answer» elements are those in which same kinds of atom are found for ex . iron and mixture is defined as two or more substances mixed together in indefinate or inadequate proportions? | |
| 331. |
What is rydberg\'s constant..?? |
| Answer» 1.907x10^7<br>Sorry the correct answer is 1.097×10^7<br>1.907 × 10^7 | |
| 332. |
What is substance? |
| Answer» Which iS made up of matter | |
| 333. |
Examples of formal charge |
| Answer» | |
| 334. |
I\'m unable to understand unit 12 |
| Answer» I\'m tryed many times but unable to reach that site u suggest. Give me another link<br>You can understand unit 12 from this link http://bit.ly/2L52rAF. I found it very useful | |
| 335. |
Mass percent question 3 at least |
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| 336. |
Notes of carboxylic acid |
| Answer» Carboxylic Acids:Carboxylic acids are the compounds containing the carboxylfunctional group (-COOH).\tPreparation of carboxylic acid:(i) From alcohols: Primary alcohols are readily oxidised to carboxylic acids with common oxidising agents such as potassium permanganate (KMnO4) in neutral, acidic or alkaline media or by potassium dichromate (K2Cr2O7) and chromium trioxide (CrO3) in acidic media.(iii) From alkylbenzenes: Aromatic carboxylic acids can be prepared by vigorous oxidation of alkyl benzenes with chromic acid or acidic or alkaline potassium permanganate.(vi) From Grignard reagent: Grignard reagents react with carbon dioxide (dry ice) to form salts of carboxylic acids which on hydrolysis forms carboxylic acids. | |
| 337. |
What is the substance which reduces combustion and makes it slow? |
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| 338. |
What is hamiltonian operator |
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| 339. |
why is nitrogen gas while the phosphorus is solid? |
| Answer» N2 is exist as diatomic molecule in which two nitrogen atoms are attached to each other by triple bond this triple bond is due to p(pie)-p(pie) multiple bonding (sidewise overlapping) and such bonding is not possible in phosphorus due to it\'s large size but possible in nitrogen due to it\'s small size.\xa0In case of phosphorus four atoms are associated so it have high molecular mass ,large magnitude of venderwall forces so phosphorus is solid and nitrogen is gas. | |
| 340. |
Best youtube channel for physics and chemistry |
| Answer» Physics wallah and ps sir etoos education<br>Physics wallah is the best....i am sure u will luv it<br>Physics wallah❤❤<br>Pradeep kshetrapal for physics.. | |
| 341. |
I have to know briefly about the rutherford\'s atomic model? |
| Answer» | |
| 342. |
Solve 20 example based on molarity |
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| 343. |
Which elements has higher ionisation enthalpy |
| Answer» HELIUM HAS HIGHER IONISATION ENTHAIPY<br>Thus, helium has the largest first ionization energy, while francium has one of the lowest. | |
| 344. |
Charecteristics of Humphary Series ???? |
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| 345. |
What is the importance of chemistry ? |
| Answer» Chemistry is the branch of science that studies the composition, properties and interaction of matter. chemical principles are importantin diverse ares, such as: weather patterns, functioning of brain and operation of a computer, chemical industries ect<br>a branch of science dealing with study of matter<br>chemistry is nothing but a subject dealing with matter. starting from the tip of a small pin to the huge universe is made up of atoms , which is chemistry | |
| 346. |
Give a simple definition of element that what is element? |
| Answer» *species (atoms and molecules)<br>Any substance that contains only one kind of an atom is known as an element.An element is a form of matter that cannot be broken down by chemical reactions into simpler substances. | |
| 347. |
Explain quantization if energy. |
| Answer» The quantization of energy refers to the fact that at subatomic levels, energy is best thought of as occuring in discreet "packets" called photons. The red and blue photons are therefore "quantized" just as dollar bill denominations are "quantized". Each photon contains a unique amount of discreet energy. | |
| 348. |
If the density of 1M Naoh solution is 2g per cm3 then molality of solution is |
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| 349. |
0.40 molal 100 ml solution of Nacl is diluted to 1000 ml.The molarity of resultant solution is |
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| 350. |
Is there anyone who took coaching from aakash instituteI have doubt in chemistry from term test 1 |
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