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.
| 1301. |
Question 1If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon? |
|
Answer» Question 1 |
|
| 1302. |
61. During electrolysis of fused aluminium chloride 0.9 g of aluminium was deposited on the cathode. The volume of chlorine liberated at the anode will be? |
| Answer» 61. During electrolysis of fused aluminium chloride 0.9 g of aluminium was deposited on the cathode. The volume of chlorine liberated at the anode will be? | |
| 1303. |
In compound X, all bond angles are exactly 109o 28’, X is: |
|
Answer» In compound X, all bond angles are exactly 109o 28’, X is: |
|
| 1304. |
In a unit cell, atoms A, B, C and D are present at corners, face-centres, body-centre and edge- centres respectively. If atoms touching one of the plane passing through two diagonally opposite edges are removed, then formula of compound is (1) ABCD2 (2) ABD2 (3) AB2D2 (4) AB D |
| Answer» In a unit cell, atoms A, B, C and D are present at corners, face-centres, body-centre and edge- centres respectively. If atoms touching one of the plane passing through two diagonally opposite edges are removed, then formula of compound is (1) ABCD2 (2) ABD2 (3) AB2D2 (4) AB D | |
| 1305. |
Is magnesium oxide a solid or gas ? |
| Answer» Is magnesium oxide a solid or gas ? | |
| 1306. |
What is emulsion? |
|
Answer» What is emulsion? |
|
| 1307. |
Volume of gasses evolved when dil.H2So4 is electrolysed using 2F at STP |
| Answer» Volume of gasses evolved when dil.H2So4 is electrolysed using 2F at STP | |
| 1308. |
KClO3 on heating gives KCl and O2 then Mg and O2 on heating gives MgO. The number of moles of MgO produced when oxygen produced by 1 mole of KClO3 is completely reacted with Mg is (1)1 mole (2) 2 mole (3)3mole(4)4mole |
| Answer» KClO3 on heating gives KCl and O2 then Mg and O2 on heating gives MgO. The number of moles of MgO produced when oxygen produced by 1 mole of KClO3 is completely reacted with Mg is (1)1 mole (2) 2 mole (3)3mole(4)4mole | |
| 1309. |
Question 1Why does a desert cooler cool better on a hot dry day? |
|
Answer» Question 1 |
|
| 1310. |
Work out the formulae for the following compounds : (a) Sodium oxide (b) Calcium carbonate |
|
Answer» Work out the formulae for the following compounds : (a) Sodium oxide (b) Calcium carbonate |
|
| 1311. |
which has more weight 6.022*1023 atoms of oxygen or carbon? __ |
|
Answer» which has more weight 6.022*1023 atoms of oxygen or carbon? |
|
| 1312. |
Probability of decay of a nucleus in a given radioactive sample in n mean lives is |
| Answer» Probability of decay of a nucleus in a given radioactive sample in n mean lives is | |
| 1313. |
An element Z forms an oxide ZO3.(a) What is the valency of element Z?(b) What will be the formula of fluoride of Z? |
|
Answer» An element Z forms an oxide ZO3. (a) What is the valency of element Z? (b) What will be the formula of fluoride of Z? |
|
| 1314. |
If the density of a certain gas at 30^° C and 760torrr is 1.35 kg /m3 its density at STP is |
| Answer» If the density of a certain gas at 30^° C and 760torrr is 1.35 kg /m3 its density at STP is | |
| 1315. |
Ideal gases and real gases are compressible or not compressible what is the compressible factor for real gases and ideal gases. |
| Answer» Ideal gases and real gases are compressible or not compressible what is the compressible factor for real gases and ideal gases. | |
| 1316. |
Arrange the molecules in the increasing order of molecular weight from top to bottom. |
|
Answer» Arrange the molecules in the increasing order of molecular weight from top to bottom. |
|
| 1317. |
Elastic limit is the property of body whereas elasticity is the property of material of a body. Explain the reason behind this difference |
| Answer» Elastic limit is the property of body whereas elasticity is the property of material of a body. Explain the reason behind this difference | |
| 1318. |
How to write a chemical formula for hydrogen sulphide and Aluminium hydroxide. And what are their valencies? |
|
Answer» How to write a chemical formula for hydrogen sulphide and Aluminium hydroxide. And what are their valencies? |
|
| 1319. |
Sulphuric acid has highest importance in chemical industry. Why? |
| Answer» Sulphuric acid has highest importance in chemical industry. Why? | |
| 1320. |
Look at the diagram on the right side.Jar A contains a red -brown gas whereas jar B contains a colourless gas. The two gas jars separated by a glass plate placed between them (a) What will happen when the glass plate between the two jars is pulled away ? (b What name is givnen to the phenomenon which takes place ? (c Name the brown gas which could be in jar A. (d Which is the colourless gas most likely to be present in jar B? (e) Name one coloured solid and one colourless liquid which can show the same phenomenon. |
|
Answer» Look at the diagram on the right side.Jar A contains a red -brown gas whereas jar B contains a colourless gas. The two gas jars separated by a glass plate placed between them (a) What will happen when the glass plate between the two jars is pulled away ? (b What name is givnen to the phenomenon which takes place ? (c Name the brown gas which could be in jar A. (d Which is the colourless gas most likely to be present in jar B? (e) Name one coloured solid and one colourless liquid which can show the same phenomenon.
|
|
| 1321. |
Question 15Give the formulae of the compounds formed from the following sets of elements(a) Calcium and fluorine(b) Hydrogen and sulphur(c) Nitrogen and hydrogen(d) Carbon and chlorine(e) Sodium and oxygen(f) Carbon and oxygen |
|
Answer» Question 15 (a) Calcium and fluorine |
|
| 1322. |
The standard enthalpies of formation of Co2(g),H2O(l) and butane (g) at 25^°C are -400 kJ/mol,-300 kJ/mol and -125 kJ/mol respectively.The standard enthalpy of combustion of butane at 25^°C is ? |
| Answer» The standard enthalpies of formation of Co2(g),H2O(l) and butane (g) at 25^°C are -400 kJ/mol,-300 kJ/mol and -125 kJ/mol respectively.The standard enthalpy of combustion of butane at 25^°C is ? | |
| 1323. |
On Farenheit scale, the boiling point of water is : |
|
Answer» On Farenheit scale, the boiling point of water is :
|
|
| 1324. |
What is partial double bond characterWho can show partial double bond character |
|
Answer» What is partial double bond character Who can show partial double bond character |
|
| 1325. |
Why does the water kept in an earthen pot become cool in summer |
|
Answer» Why does the water kept in an earthen pot become cool in summer |
|
| 1326. |
Which property of aluminium makes it suitable to be used as a foil for wrapping food. |
|
Answer» Which property of aluminium makes it suitable to be used as a foil for wrapping food. |
|
| 1327. |
Bohr proposed that while revolving in discrete orbits, the electrons: |
|
Answer» Bohr proposed that while revolving in discrete orbits, the electrons: |
|
| 1328. |
There are three solids, made up of aluminum, steel and wood respectively. They are of the same shape and same volume. Which of them would have the highest inertia? |
|
Answer» There are three solids, made up of aluminum, steel and wood respectively. They are of the same shape and same volume. Which of them would have the highest inertia?
|
|
| 1329. |
What is the relationship between range and height |
| Answer» What is the relationship between range and height | |
| 1330. |
What are the differences between compounds and molecules. Please give some examples too. |
| Answer» What are the differences between compounds and molecules. Please give some examples too. | |
| 1331. |
What is the use of hydrogen peroxide in electrolysis? |
| Answer» What is the use of hydrogen peroxide in electrolysis? | |
| 1332. |
The formula for the given compound is |
|
Answer» The formula for the given compound is |
|
| 1333. |
What are the causes of water pollution? How can you reduce water pollution? [3 MARKS] |
|
Answer» What are the causes of water pollution? How can you reduce water pollution? [3 MARKS] |
|
| 1334. |
Two particles of charges and masses (+q1and m1) and (-q2 and m2). Are released at two different locations in uniform electric field E in space. If their separations remains unchanged find the separation between them. |
| Answer» Two particles of charges and masses (+q1and m1) and (-q2 and m2). Are released at two different locations in uniform electric field E in space. If their separations remains unchanged find the separation between them. | |
| 1335. |
___ is the method that can be used for separation of components of a mixture containing two miscible liquids. |
|
Answer» |
|
| 1336. |
Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour? |
|
Answer» Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour? |
|
| 1337. |
Deduce the number of neutrons from the atomic number (Z) and mass number (A). |
|
Answer» Deduce the number of neutrons from the atomic number (Z) and mass number (A). |
|
| 1338. |
Which of the following salts is not used in a salt bridge? |
|
Answer» Which of the following salts is not used in a salt bridge? |
|
| 1339. |
What is a base? Give one example. |
|
Answer» What is a base? Give one example. |
|
| 1340. |
Question 21.2 Complete the missing component/variable given as x in the following reaction: Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+x(s) |
|
Answer» Question 21.2 Complete the missing component/variable given as x in the following reaction: Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+x(s) |
|
| 1341. |
When heated, potassium permanganate decomposes according to the following equation:2KMnO4 → K2MnO4 + MnO2 + O2(a) Some potassium permanganate was heated in a test tube. After collecting one litre of oxygen at room temperature, it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g, calculate the relative molecular mass of oxygen.(b) Given that the molecular mass of potassium permanganate is 158 g, what volume of oxygen (measured at room temperature) would be obtained by the complete decomposition of 15.8 g of potassium permanganate? (Molar volume at room temperature is 24 litres). (K = 39, Mn = 55, O = 16) |
|
Answer» When heated, potassium permanganate decomposes according to the following equation: |
|
| 1342. |
What do you understand by symbols of chemical elements? Give the symbols of carbon, calcium, copper, chlorine and cobalt. |
|
Answer» What do you understand by symbols of chemical elements? Give the symbols of carbon, calcium, copper, chlorine and cobalt. |
|
| 1343. |
Six charges are placed at the vertices of a regular hexagon |
| Answer» Six charges are placed at the vertices of a regular hexagon | |
| 1344. |
17. Two mole of N2 and 6 moles of H2 are mixed in a litre flask. If 50% N2 is converted into ammonia by the reaction. N2(g) + 3H2(g) 2NH3(g), the value of Kc for the reaction is a. 4 / 27 b. 27 / 4 c. 1 / 27 d. 27 |
| Answer» 17. Two mole of N2 and 6 moles of H2 are mixed in a litre flask. If 50% N2 is converted into ammonia by the reaction. N2(g) + 3H2(g) 2NH3(g), the value of Kc for the reaction is a. 4 / 27 b. 27 / 4 c. 1 / 27 d. 27 | |
| 1345. |
ntwhy we minus 8 for valencies foe N,O,F,Nen |
| Answer» ntwhy we minus 8 for valencies foe N,O,F,Nen | |
| 1346. |
mole fraction of a gas in water is 0.001 at STP determine its Henry's law cons†an |
| Answer» mole fraction of a gas in water is 0.001 at STP determine its Henry's law cons†an | |
| 1347. |
Choose the correct answer from the options given below:(i) In the periodic table alkali metals are placed in the group ___________(a) 1(b) 11(c) 17(d) 18(ii) Which of the following properties do not match with elements of the halogen family?(a) They have seven electrons in their valence shell.(b) They are highly reactive chemically.(c) They are metallic in nature.(d) They are diatomic in their molecular form. |
|
Answer» Choose the correct answer from the options given below: (i) In the periodic table alkali metals are placed in the group ___________ (a) 1 (b) 11 (c) 17 (d) 18 (ii) Which of the following properties do not match with elements of the halogen family? (a) They have seven electrons in their valence shell. (b) They are highly reactive chemically. (c) They are metallic in nature. (d) They are diatomic in their molecular form. |
|
| 1348. |
when we have molecular mass then what is the need of having formula unit mass specially for ionic compounds |
| Answer» when we have molecular mass then what is the need of having formula unit mass specially for ionic compounds | |
| 1349. |
Arrange the molecules in the increasing order of molecular weight. |
|
Answer» Arrange the molecules in the increasing order of molecular weight. |
|
| 1350. |
tell about inert pair effect in group 16 elements except target |
| Answer» tell about inert pair effect in group 16 elements except target | |
