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.
| 251. |
Which of the following reactions is possible ?A. `FeSO_(4) + Cu to CuSO_(4) +Fe`B. `CuSO_(4) +Fe to FeSO_(4) + Cu`C. `Cuu+ZnSO_(4) to CuSO_(4) + Zn`D. none of these |
| Answer» Correct Answer - B | |
| 252. |
Which of the following reaction is feasible ?A. `3Cu + Al_(2)(SO_(2))_(3) to 3CuSO_(4) +2Al`B. `Fe + ZnSO_(4) to FeSO_(4) +Cu`C. `CUSO_(4)+ Fe to FeSO_(4) + Cu`D. `Cu + ZnSO_(4) to CuSO_(4) + Zn` |
| Answer» Correct Answer - C | |
| 253. |
Which of the following is a decomposition reaction ?A. `NaOH + HCI to NaCI + H_(2)O`B. `2Mg+O_(2) to 2MgO`C. `2Pb(NO_(3))_(2) to 2PbO + 4NO_(2) +O_(2)`D. `NaCI + AgNO_(3) to AgCI + NaNO_(3)` |
| Answer» Correct Answer - C | |
| 254. |
When magnesium burn in air , another compound is formed along with magnesium oxide . Name the compound.A. magnesium peroxideB. Magnesium nitriteC. Magnesium nitrideD. none of the above |
| Answer» Correct Answer - C | |
| 255. |
The buring of magnesium in air is aA. synthesis reactionB. decomposition reactionC. displacement reactionD. neutralization reaction |
| Answer» Correct Answer - A | |
| 256. |
Buring of a magnesium ribbon in air takes place withA. a green flameB. a yellow flameC. a dazzling white lightD. an orange flame |
| Answer» Correct Answer - C | |
| 257. |
Name the product formed when magnesium burns in air ? |
| Answer» Magnesium oxide . | |
| 258. |
What is the valency of magnesium in magnesium oxide ? |
| Answer» Correct Answer - 2 | |
| 259. |
The gas evolved when zinc reacts with dilture HCI isA. chlorineB. oxygenC. hydrogenD. carbon dioxide |
| Answer» Correct Answer - C | |
| 260. |
What is the valency of nitrogen in magnesium nitride ? |
| Answer» Correct Answer - 3 | |
| 261. |
When magnesium burns in air, another compound is formed along with magnesium oxide. Name the compound.A. Magnesium peroxide.B. Magnesium nitriteC. Magnesium nitrideD. none of the above |
| Answer» Correct Answer - C | |
| 262. |
Why is magnesium nitride formed when magnesium burns in air ? |
|
Answer» This is because magesium also combines with the nitrogen present in air . ` 3Mg + N_(2) to Mg_(3)N_(2)` |
|
| 263. |
Name the gas produced when zinc dissolves in dilute HCI. |
| Answer» Correct Answer - Hydrogen . | |
| 264. |
Name the product formed when magnesium burns in air. |
| Answer» Magnesium oxide. | |
| 265. |
Respiratory substrate. |
| Answer» The substances oxidized during respiration are called respiratory substrates , e.g., carbohydrates, fats and proteins. | |
| 266. |
Why does zine displace hydrogen from dilute `H_(2)SO_(4)` ? |
| Answer» This is because zine is more reactive than hydrogen . | |
| 267. |
What is the difference between the processes of respiration and photosynthesis ? |
| Answer» Respiration is a catabolic process, whereas photosynthesis is an anabolic process. | |
| 268. |
Define fermentation |
| Answer» The incomplete anaerobic breakdown of a respiratory substrate with the production of `CO_2` and energy is called fermentation | |
| 269. |
What is the product formed when hydrogen burns in air ? |
| Answer» Correct Answer - water | |
| 270. |
A solution does not change the colour of litmus paper . What would be the pH value of the solution ? |
| Answer» Correct Answer - 7 | |
| 271. |
What change does zinc undergo when it is reacted with dilute `H_(2)SO_(4)` ? |
|
Answer» A zinc atom loses two electrons and gets oxidized into ` Zn^(2+)` ion. ` Zn to Zn^(2+) +2e` |
|
| 272. |
For the complete oxidation of glucose to carbon dioxide and water organisms undergoA. aerobic respirationB. anaerobic respirationC. fermentationD. all of these |
| Answer» Correct Answer - A | |
| 273. |
Anaerobic and aerobic respiration releaseA. ethyl alcoholB. waterC. energyD. lactic acid |
| Answer» Correct Answer - B | |
| 274. |
What is circinate vernation ? |
| Answer» Young leaves of Pinus remain coiled like a spring and open slowly from the base upwards as they mature. This is called circinate vernation. | |
| 275. |
Why are mushrooms called saprophytes ? |
| Answer» Because they derice food from dead and decaying organic matter. | |
| 276. |
What are bryophytes ? |
| Answer» Bryophytes are nonvasular , thalloid , autotrophic plants with multicellular sex organs surrounded by a sterile jacket. | |
| 277. |
How are pteridophytes different from bryophytes / |
| Answer» A pteridophyte is differentiated into root , stem , leaves, has vascular tissues (xylem and phloem), and the sporophyte is independent . All these are absent in bryophytes . | |
| 278. |
What happens during sexual reproduction ? |
| Answer» In sexual reproduction, the male and female partners produce gametes , which later fuse to form new individuals . | |
| 279. |
Which stain is used while preparing a temporary mount of a leaf peel ? |
| Answer» Correct Answer - Safranin | |
| 280. |
which of the following will give a true solution when dissolved in water ?A. Find sandB. OilC. Chalk powderD. sugar |
| Answer» Correct Answer - D | |
| 281. |
A solution of hydrochloric acid is dropped on baking soda. The gas evolved isA. sulphur dioxideB. hydrogenC. carbon dioxideD. oxygen |
| Answer» Correct Answer - C | |
| 282. |
when a small quantity of common salt is added to waterA. a suspension is formedB. a colloidal solution is formedC. a true solution is formedD. water becomes turbid |
| Answer» Correct Answer - C | |
| 283. |
What happens when a small amount of baking soda is taken in a test tube and some dilute hydrochloric acid is added to it ?A. A rapid reaction occurs but no gas evolves .B. A blue-coloured solution is obtained .C. A brisk effervescence occurs with the evolution of carbon dioxide gas .D. hydrogen gas is produced |
| Answer» Correct Answer - C | |
| 284. |
5 mL of acetic acid is dissolved in 20mL of water. The volume of the solution becomes.A. 25 mLB. more than 25 mLC. less than 25 mLD. none of these |
| Answer» Correct Answer - C | |
| 285. |
When a small quantity of common salt is added to waterA. a suspension is formedB. a colloidal solution is formedC. a true solution is formedD. water becomes trubid |
| Answer» Correct Answer - C | |
| 286. |
Which of the following will give a true solution when dissolved in water ?A. Fine sandB. KeroseneC. Charcoal powderD. Potash alum |
| Answer» Correct Answer - D | |
| 287. |
When a true solution is filteredA. the filtrate obtained is turbidB. a solid residue is left on the filtered paperC. the solute gets separated from the solventD. the filtrate is as good as the true solution . |
| Answer» Correct Answer - D | |
| 288. |
A mixture of chalk powder and water makes aA. colloidal solutionB. suspensionC. clear solutionD. homogeneous solution |
| Answer» Correct Answer - B | |
| 289. |
What do you think would happen when a mixture of iron fillings and sulphur powder is heated ? |
| Answer» Ferrous sulphide , a compoud of iron and sulphur , will be formed . | |
| 290. |
Why is the spirogyra commonly known as pond silk ? |
| Answer» The filament of spirogyra are slimy and silk like in texture. | |
| 291. |
What makes the spirogyra filaments slimy to touch ? |
| Answer» The outer cell wall of spirogyra is made of protein which dissolves in water and forms a slimy mucilaginous envelope around the filament . | |
| 292. |
When you observe the onion peel under the high magnification of the microscope after observing it under low magnification what differences do you see ?A. Cell size appears largerB. Fewer cells are seenC. Cell organelles look magnifiedD. All of these |
| Answer» Correct Answer - D | |
| 293. |
Dumb-bell shaped guard cells are found inA. gymnospermsB. dicotsC. monocotsD. xerophytes |
| Answer» Correct Answer - C | |
| 294. |
Is the rate of photosynthesis same throughout the day ? |
| Answer» No, the rate of photosynthesis varies with the amount and intensity of light available at different times during the day | |
| 295. |
Name the root that develops from any unusual part of the plant body |
| Answer» Adventitious root | |
| 296. |
Name the part of the plant which develops from plumule of embryo |
| Answer» Correct Answer - Stem | |
| 297. |
Name the part of the stem that lies between two nodes. |
| Answer» Correct Answer - Internode | |
| 298. |
A muscle cell isA. provided with an end bulbB. sheathedC. myelinatedD. contractile |
| Answer» Correct Answer - D | |
| 299. |
A nerve cell isA. stripedB. nonstripedC. syncytialD. elongated |
| Answer» Correct Answer - D | |
| 300. |
A muscle cell isA. A provided with an end bulbB. sheathedC. myelinatedD. contractile |
| Answer» Correct Answer - D | |