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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.
| 1301. |
Liquid state and Gaseous state. |
Answer» SOLUTION : 
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| 1302. |
Liquid-liquid colloids are called gels. |
| Answer» SOLUTION :CORRECT STATEMENT: Liquid-solid colloids are called gels. | |
| 1303. |
Liquefaction of a gas |
| Answer» Solution :The process of CONVERSION of a gas liquid of reducing TEMPERATURE and applying PRESSURE is called liquefaction of a gas. | |
| 1304. |
Light will get scattered when a beam lightis allowed to pass through |
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Answer» an AQUEOUS solution of UREA |
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| 1305. |
Let us divide the class into groups A, B, C and D. Group A takes a beaker containing 50 mL of water and one spatula full of copper sulphate powder. Group B takes 50 mL of water and two spatula full of copper sulphate powder. Groups C and D can take different amounts of copper sulphate and potassium permanganate or common salt (sodium chloride) and mix the given components to form a mixture. Compare the colour of the solutions of the groups A and B. |
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Answer» Solution :The INTENSITY of colour of the solution is different. This shows that a homogeneous MIXTURE can have a variable composition. Groups C and D have obtained mixtures, which contain physically distinct PARTS and have non-uniform compositions. Such mixtures are called heterogeneous mixtures. Mixtures of (a) sodium chloride and iron filings (b) salt and sulphur ( c) OIL and water are the examples of heterogeneous mixtures. |
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| 1306. |
Let us divide the class into groups A, B, C and D. Group A takes a beaker containing 50 mL of water and one spatula full of copper sulphate powder. Group B takes 50 mL of water and two spatula full of copper sulphate powder. Groups C and D can take different amounts of copper sulphate and potassium permanganate or common salt (sodium chloride) and mix the given components to form a mixture. Report the observations on the uniformity in colour and texture. |
| Answer» Solution :Group A and B have obtained a MIXTURE, which has a uniform COMPOSITION throughout, called homogeneous MIXTURES. | |
| 1307. |
{:("Latent heat","(a)Separating funnel"),("Emulsion","(b)Heterogenous mixture"),("Liquid","(c)Hidden head"),("Solution","(d)Fractional distillation"),("Suspension","(e)Homogenous mixture"),("Miscible Liquids","(f)Colloid"),("Immiscible liquids","(g)Flows freely"):} |
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| 1308. |
Latent heat of fusion. |
| Answer» Solution :The amount of heat ENERGY required to chagne 1 KG of a solid into liquid at atmosphericpressure, at its MELING POINT is called the latent heat of fussion. | |
| 1309. |
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements. |
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| 1310. |
Lanthanides and actinides are called _________elements |
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| 1311. |
Label the arrows marked A,B in the following: a. Solid underset(B)overset(A)(hArr) liquid b. Liquid underset(B)overset(A)(hArr) Gas c.Solid underset(B)overset(A)(hArr) Gas |
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Answer» SOLUTION :a.A: Liquefaction (or melting or fusion) B: Solidification. b. A: VAPORISATION, B: CONDENSATION c. A: Sublimationl, B: SUBLIMATION |
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| 1312. |
Kinetic energy of molecules is directly proportional to |
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Answer» TEMPERATURE |
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| 1314. |
K_(c ) for the reaction in the formation of ammonia is equal to 3xx10^(-2) . Predict whether the reaction with the following concentrations is at equilibrium. If not, predict the direction in which the reaction will proceed to reach equilibrium ? [NH_(3)]=0.5xx10^(-3) M [N_(2)]=0.5xx10^(-6)M [H_(2)]=1xx10^(-3)M |
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Answer» Solution :`(i) N_(2) +3H_(2) to 2NH_(3)` (ii) balanced CHEMICAL equation (iii) calculation of the ratio of products and REACTANTS where the coefficients are raised to their powers (iv) comparison of the above ratio with the given `K_(C )` (v) concentration of reactants and products |
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| 1315. |
K_(C ) for the reaction (1)/(2)N_(2)(g)+(3)/(2)H_(2)(g) hArr NH_(3(g)) is |
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Answer» `K_(c )=([NH_(3)])/([N_(2)][H_(2)])` `K_(c )=([NH_(3)])/([N_(2)]^(1/2)[H_(2)]^(3/2))` |
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| 1316. |
K_(c ) for the reaction 2SO_(2(g))+O_(2(g)) hArr 2SO_(3(g)) has a value of 0.04. What would be the value of K_(c ) for the reverse reaction ? |
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Answer» Solution :(i) IDENTIFICATION of the COLOURLESS GAS (II) 25 |
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| 1317. |
K_(c ) changes with change in ____. |
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| 1319. |
Kalium is the latin name of___ |
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Answer» Potassium |
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| 1320. |
IUPAC name of a hydrocarbon is given as 3,5-Dixenthyl-2-hexene.Identify the correct sequence of steps to draw its structural formula . ( 1) numbering of carbon chain( 2)locatingthe position of double bond( 3) writing long chain corresponding to hexne (4) locating the methyl groups (prefixes ) at the respective positions( 5)placing hydrogens to stasisfy tetravelency of carbon |
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Answer» 13254 (ii) numbering of carbon chain (III) locating the position of double bond (iv)locating the methyl groups (prefixes) at the respective position (V) locating HYDROGEN molecules to SATISFY tetrava-lency of carbon |
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| 1321. |
It Z represent the atomic number and A represents mass number, then the number of electrons in an atom can be computed as |
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Answer» `A+Z` |
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| 1323. |
It is advisable to drink hot tea in saucer instead of drinking from a teacup. |
| Answer» Solution :If the surface AREA is increased, then the RATE of evaporation INCREASES. As the open surface area of SAUCER is miore than that in teacup, the tea cools faster. Hence it is advisable to drink tea from saucer. | |
| 1324. |
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why ? |
| Answer» Solution :Priyanshi would be more comfortable than Ali since she is WEARING COTTON clothes. Being porous in NATURE, cotton clothes would absorb moisture from the body. As it evaporates, it results in cooling giving comfort to the body. Since Ali is wearing nylon clothes which have hardly any PORES, he would feel LESS comfortable. | |
| 1325. |
Isotopes of an element have the same atomicnumber. |
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| 1326. |
Isotopes of an element have the different atomic numbers. |
| Answer» SOLUTION :Correct Statement : Isotopes are atoms of the same ELEMENT, which have same atomic number but different MASS NUMBERS . | |
| 1327. |
Isotopes of an element have |
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Answer» The same physical properties |
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| 1328. |
Isotopes of an element are the atoms which have |
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Answer» the same NUMBER of PROTONS in their nuclei |
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| 1329. |
Isotopes have the same .............. .......... but different.......... ............ |
| Answer» SOLUTION :ATOMIC NUMBER , atomic MASSES | |
| 1330. |
Isotopes and Isobars |
Answer» SOLUTION :
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| 1331. |
Isn't there a relationship between electronegativity and metallic, non metallic character? Explain the relationship? |
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| 1332. |
Is wood a homogeneous material ? |
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| 1333. |
___________is used for making shoe polishes. |
| Answer» SOLUTION :N/A | |
| 1334. |
Is there any relationship between the group number and the number of electrons present in the outermost shell? What is it? |
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| 1335. |
Is the velocity ofan electron in all orbits the same for an atom of a particular element ? How does it very for different single electron specites ? Give reasons in support of your answer. |
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Answer» SOLUTION :(i) forces acting on moveing electron. (ii) position of the electron in the ORBIT. (iii) relationship between position, forces and VELOCITY. (IV) COMPARISON of nuclear charge in different single electron species. |
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| 1336. |
Is the water still coloured? |
| Answer» Solution :The WATER is STILL coloured but the COLOUR FADES with dillution. | |
| 1337. |
Is the total number of atoms of each element in the molecules present in the reactant side and that in the product side equal in this equation ? |
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| 1338. |
Is the same way aren't the elements with atomic number 90 to 103 of period 7 give separate position at the bottom of the periodic table? |
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| 1339. |
Is the property involved in the shinning of diamond and lustre of metals of the same ? Justify. |
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Answer» Solution :(i) STRUCTURE (ii) COMPARISON between type of bonding in metal and DIAMOND (iii) influence of metallic on lustre of metals (iv) optical phenomenon which helps in shine of diamond (v) influence of arrangement of carbon ATOMS in diamond. |
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| 1340. |
Is the presence of water necesaary for the biological fixation of nitrogen ? |
| Answer» SOLUTION :No, the ATMOSPHERIC NITROGEN is fixed DIRECTLY by bacteria into nitrogeneous COMPOUNDS . | |
| 1342. |
Is the positively charged particle produced from the hydrogen gas called the proton ? |
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| 1343. |
Is the energy difference between successive orbits the same for all orbits? Justify your answer. |
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Answer» Solution :(i) FACTORS AFFECTING DEFLECTION (ii) the effect of atomic number on deflection (III) the effect of kinetic energy on deflection |
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| 1344. |
Is the Dobereiner's law of triads applicable for phosphorus arsenic and antimony? Explain |
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Answer» <P> Solution :yes P,As and Sb also FOLLOW DOBEREINER's law TRIAD`{:("Atomic weight of P","Atomic weight of As","Atomic weight of Sb", "31+21"/2=76),(31,75,121,):}` |
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| 1345. |
__________is the chemical name of bleaching powder. |
| Answer» SOLUTION :N/A | |
| 1346. |
Is the atom as a whole positively charged ? |
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| 1350. |
Is it possible to create matter ? |
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