InterviewSolution
Saved Bookmarks
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.
| 5551. |
Graphite is |
|
Answer» HARDER than diamond |
|
| 5552. |
Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. Under what conditions do these grapes ferment: Is it a chemical or physical change? |
| Answer» Solution :Graphes when attached to the PLANTS are living and therefore, their own immune system prevents FERMENTATION. The microbes can grow in the PLUCKED grapes and under anaerobic conditions these can be fermented. This is a chemical CHANGE. | |
| 5553. |
Grapes hanging on plant do not ferment but after being plucked from the plant they can be fermented. Under what conditions do these grapes ferment ? Is it a chemical or physical change ? |
| Answer» SOLUTION :GRAPES ferment in anaerobic conditions in the presence of SUGARS and it is a chemical CHANGE. | |
| 5554. |
Gram-atomic mass of an element may be defnined as the mass of Avogadro’s number of atoms. |
|
Answer» |
|
| 5555. |
Grammolar volumeof allgasescan bedeterminedby ________. |
| Answer» SOLUTION :AVOGADRO HYPOTHESIS | |
| 5556. |
Grammolarvolume =_____. |
| Answer» SOLUTION :`("Grammolar MASS ")/(" DENSITYOF gasat STANDARD TEMPERATURE")` | |
| 5558. |
Gold metal is affected by |
| Answer» Answer :A | |
| 5559. |
Gold does bot occur in the combined form it does not react with air or water . It is in the …………… State . |
| Answer» Answer :A | |
| 5560. |
Gold as alloyed with which metal to make it harder ? |
|
Answer» CU |
|
| 5561. |
Gold and silver are the most malleable metals. |
| Answer» SOLUTION :TRUE - We know GOLD is used in JEWELLERY. | |
| 5562. |
Glucose is converted into ethanol in the presence of : |
|
Answer» Zymase |
|
| 5563. |
Glass used for making wind screens of automobiles is |
|
Answer» HARD glass |
|
| 5564. |
Given that the N shell of an element contains 10 electrons, write the electronic configuration of the stable ion. |
| Answer» SOLUTION :IDENTIFICATION of ATOMIC NUMBER. | |
| 5565. |
Given that calcium reacts with chlorine to form a compound of the formulaCaCl_(2). Predict the formmula of the product of the reaction between magnesium and chlorine. |
| Answer» Solution :We KNOW from the periodic table that magnesium (MG) BELONGS to the same group as calcium (CA). Thus, the formula of the product should be `MgCl_(2)`. | |
| 5566. |
Given reason: (a) Aluminium is a reactive metal but is still used for packing food articles. (b) Red litmus paper turns blue when touched with aqueous solution of magnesium oxide. |
|
Answer» SOLUTION :(a) On exposure to air, aluminium forms a hard protective LAYER of aluminium oxide `(Al_(2)O_(3))`which prevent further oxidation. (b) Magnesium oxide is an oxide of a metal, so, it is basic in nature. Due to its character it turns red litmus PAPER blue when touched with its aqueous solution. |
|
| 5567. |
Given below are the atomic radii of three elementsA, B and C of the peroodic table,each having n electrons in the outermost shell of its atom. Answer the following (i) Will the valencies of these elements be the same or different ? (ii) which the element will have the highes atomic number ? |
|
Answer» Solution :(i) All the elements have the same number of electrons in the their OUTERMOST shell i.e.,valence shell. Hence, these elements will be present in the same group of the periodic table and their VALENCIES will be the same. (ii) In a group, atomic RADII of elements INCREASE as we move from top to bottom. Hence, USING the given data of atomic radii the order radii the order of these elements fromtop to bottom would be A,B and C. We know that the atomic number of elements increases as we go down a group of the periodic table. Thus, element C will have the highest atomic number. |
|
| 5568. |
Given below are the formulae of some functional groups: Write the name of these functional groups |
|
Answer» |
|
| 5569. |
Given below are some elements of the Modern Periodic Table. Atomic number of the element is given in the parentheses: A(4), B(9), C(14), D(19), E(20)(a) Select the element that has one electron in the outermost shell. Also write the electronic configuration of this element. (b)Which two elements amongst these belong to the same group? Give reason for your answer.(c) Which two elements amongst these belong to the same period? Which one of the two has bigger atomic radius? |
|
Answer» Solution :(a) D, the electronic configuration of D(19) is 2,8,8, 1. (b) A and E belong to the same GROUP as both have the same number of VALENCE ELECTRONS, i.e., 2. (c) A, B and D, E. A has a bigger atomic radius than B and D has a bigger atomic radius than E. |
|
| 5570. |
Given below are some of the elements of first group Li, Na, K (Their atomic numbers are 3, 11 , 19 respectively and they belong to 2nd, 3rd and 4th period respectively). Arrange these in the decreasing order of metallic character exhibited by them. |
| Answer» Solution :All the three ELEMENTS belong to the GROUP (1) of alkali metals. SINCE the metallic character of the elements increases down a group, the decreasing order of metallic character is `KgtNagtLi.` | |
| 5571. |
Given below are some elements of the Modern Periodic Table: ""_(4)Be, ""_(26)Fe.""_(14)Si, ""_(19)K ""_(20)Ca i) Select the element that has one electron in the outermost shell and write its electronic configuration. ii) Select two elements that belong to the same group. Give reason. iii) Select two elements that belong to the same period. Which one of the two has a bigger atomic size? |
|
Answer» Solution :The electronic configurations are: `Be (4) to 2,2, Fe (26) to` is a transition metal, `Si (14) to 2, 8, 4, K (19) to 2,8,8, I, and Ca (20) to 2, 8, 8, 2. ` i] K has ONE electron in its outermost shell and hence it belongs to GROUP 1. Its electronic configuration is 2, 8, 8,1. ii] From the electronic configuration, Be and Ca have the same number of valence electrons and hence belong to the same group. iii] Potassium (K) and calcium (Ca) belong to the same period since they have 4 electron shells each. K has bigger atomic SIZE. |
|
| 5572. |
Given below are atomic radii of same elements of second period. {:("Element","B","O","N","C"),("Atomic Radii in pm","88","66","74","77"):} Arrange these elements in the increasing order of their atomic number. Give reason for your answer. |
|
Answer» SOLUTION :B, C, N, O. In a period, as the atomic number increases, SIZE of the atom decreases. This is because increase in NUCLEAR charge tends to pull electrons closer to nucleus and reduces the size of the atom. |
|
| 5573. |
Give two wxamples from daily where redox reactions are taking place. |
| Answer» SOLUTION :COMBUSTION of FUELS and RUSTING of IRON. | |
| 5574. |
Give two important uses of washing soda and baking soda. |
|
Answer» Solution :(a) Uses of washing soda : (i) It is used in the manufacture of glass and soap . (II) It is used in the manufacture of borax. (b) Uses of BAKING soda : (i) It is used in soda-acid FIRE EXTINGUISHER. (ii) It is used for making baking powder. |
|
| 5575. |
Give two important uses to washing soda and baking soda. |
|
Answer» Solution :Two impotant uses of WASHING soda are: it is used in glass , soap ,and paper industries It is used to remove permanent HARDNESS of water. Two important uses of baking soda are. It is used as baking powder. Baking powderis MIXTURE of baking soda (Sodium, Hydrocarbonates ) and mild edible acid such as tataric acid. When it is heated or mixed in water . it RELEASES `CO_2`that makes BREAD or cake swell It is used soda-acid fire extinguishers. |
|
| 5576. |
Give two examples of: Unsaturated hydrocarbons involving C-=C bond |
| Answer» SOLUTION :`C_2H_2` and `C_3H_4` | |
| 5577. |
Give two examples of: Unsaturated hydrocarbons involving C=C bond |
| Answer» SOLUTION :`C_2H_4` and `C_3H_6` | |
| 5578. |
Give two examples of ore of aluminium? |
| Answer» SOLUTION :BAUXITE `(Al_(2)O_(3),H_(2)O)` and Cryolite `(Na_(3)AlF_(6))`. | |
| 5579. |
Give two examples of: Saturated hydrocarbons |
| Answer» SOLUTION :`CH_4` and `C_2H_6` | |
| 5582. |
Give two examples of covalent compounds which you have studied. State any four properties in which covalent compounds differ from ionic compounds. |
|
Answer» SOLUTION :TWO examples of COVALENT compounds are ethanol, and ETHANOIC acid. Difference between the properties of Covalent and Ionic compounds. 
|
|
| 5583. |
Give two examples of a reaction which is both endothermic and decomposition in nature. |
|
Answer» Solution :`CaCO_(3)(s) OVERSET("Heat")to CAO(s)+CO_(2)(g)` `ZnCO_(3)(s) overset("Heat")to ZnO(s)+CO_(2)(g)` |
|
| 5584. |
Give two examples each of the metals that are good conductors are poor conductors of heat respectively. |
|
Answer» SOLUTION :(i) Good CONDUCTORS : Ag and Cu (ii) POOR conductors : Pb and HG |
|
| 5585. |
Give two examples each of strong and weak electrolytes . |
| Answer» SOLUTION :(i)STRONG electrolytes NACL, `MgCl_(2)` (ii) Weak electrolytes : `NH_(3),CO_(2)` | |
| 5586. |
Give three ways of preventing rusting of iron. |
|
Answer» Solution :(a) By painting (B) By applying oil or grease (C) By GALVANIZING |
|
| 5587. |
Give three uses of caustic soda (NaOH). |
|
Answer» Solution : 1. It is USED in the manufacture of soaps and detergents. 2. It is used in PAPER industry. 3. It is used in the manufacture of ARTIFICIAL FIBRES. |
|
| 5588. |
Give three characteristic properties of covalent compounds. |
|
Answer» Solution :Characteristic PROPERTIES of covalent compounds. (i) They can exist as solids, liquids or gases. (ii) They have generally low MELTING and boiling points. (III) They don.t conduct electric CURRENT. |
|
| 5589. |
Give the symbols used for representing the following in a chemical equation : Formation of gaseous product. |
| Answer» SOLUTION :`UARR" (UPWARD ARROW)"` | |
| 5590. |
Give the symbols used for representing the following in a chemical equation : Formation of a precipitate |
| Answer» SOLUTION :`DARR" (DOWNWARD ARROW)"`. | |
| 5591. |
Give the structure of graphite and explain its one property based upon structure. |
|
Answer» Solution :The structure of graphite is as shown below : In graphite each C-atom is bonded to three other TOGETHER by weak VANDER Waal.s forces of attraction. Therefore, graphite has a two dimensional sheet like structure. Due to the PRESENCE of one free ELECTRON LEFT with each C-atom, graphite is a good conductor of electricity. 
|
|
| 5592. |
Give the structure of diamond and explain one property based upon structure. |
|
Answer» Solution :The structure of diamond is as SHOWN below : In diamond ATOMS by covalent bonds resulting in theformation of a three dimenstional network structure. DUE to the presence of strong covalent bonds, diamond is HARD and has high melting point. 
|
|
| 5593. |
Give the structural formula of each of the Propanone |
| Answer» SOLUTION :`H_3C - oversetunderset(||)(O)(C)-CH_3` | |
| 5594. |
Give the structural formula of each of the Propan-2-ol |
| Answer» SOLUTION :`H_3C - oversetunderset(|)(OH)(C)H - CH_3` | |
| 5595. |
Give the structural formula of each of the Methanoic acid |
| Answer» SOLUTION :`H - oversetunderset(||)(O)(C) - OH` | |
| 5597. |
Give the structural formula of each of the Ethanoic acid |
| Answer» SOLUTION :`CH_3 - oversetunderset(||)(O)(C) - O H` | |
| 5598. |
Give the structural formula of each of the Diethyl ether |
| Answer» SOLUTION :`H_3C - CH_2 - O - CH_2 - CH_3` | |
| 5599. |
Give the structural formula of each of the Ethanal |
| Answer» SOLUTION :`H_3C - oversetunderset(||)(O)(C)-CH_3` | |
| 5600. |
Give the structural formula of each of the Dimethyl ether |
| Answer» SOLUTION :`H_3C - O - CH_3` | |