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MCQOPTIONS
This section includes 1489 Mcqs, each offering curated multiple-choice questions to sharpen your 8th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1251. |
Radhika took some sodium bicarbonate in a conical flask and set up the apparatus as shown in the given diagram. She added cone. sulphuric acid into the conical flask using a funnel. Which of the flowing statements is correct for the given experiment? |
| A. | The gas coming out of the delivery tube is heavier than air and will make the candle glow brightly. |
| B. | The gas coming out of the delivery tube is lighter than air and will extinguish the candle. |
| C. | The gas coming out of the delivery tube is heavier than air and will extinguish the candle. |
| D. | The gas coming out of the delivery tube is lighter than air and will make the candle glow brightly. |
| Answer» D. The gas coming out of the delivery tube is lighter than air and will make the candle glow brightly. | |
| 1252. |
Rajiv took three substances P, Q, and R and burnt them one by one. He noted down his observations given below. I. Substance P bums quickly producing heat and light. II. Substance Q bums in room temperature on its own. III. Substance R bums with the evolution of heat, light, and sound. Which of the following statements regarding the given information is correct? |
| A. | Substances P and Q are undergoing rapid combustion whereas R is undergoing explosion. |
| B. | Substances P and R are undergoing spontaneous combustion whereas Q is undergoing rapid combustion. |
| C. | Substance P is undergoing rapid combustion, Q is undergoing spontaneous combustion while R is undergoing explosion. |
| D. | Substance P is undergoing spontaneous combustion, Q is undergoing rapid combustion while R is undergoing explosion. |
| Answer» D. Substance P is undergoing spontaneous combustion, Q is undergoing rapid combustion while R is undergoing explosion. | |
| 1253. |
Observe the given figure. What is the purpose of this experimental setup? |
| A. | To check the conductivity of copper sulphate solution. |
| B. | To get iron electroplated. |
| C. | To check the continuity of charge flow in the circuit. |
| D. | To make the electric bulb glow. |
| Answer» C. To check the continuity of charge flow in the circuit. | |
| 1254. |
____ is used in a periscope for the reflection of light. |
| A. | Concave lens |
| B. | Convex lens |
| C. | Concave mirror |
| D. | Plane mirror |
| E. | None of these |
| Answer» E. None of these | |
| 1255. |
To purify copper metal by electrolysis which of the following is used as electrolyte |
| A. | \[NaCl\]solution |
| B. | \[CuS{{O}_{4}}\]solution |
| C. | \[{{H}_{2}}S{{O}_{4}}\]solution |
| D. | \[MgS{{O}_{4}}\]solution |
| E. | None of these |
| Answer» C. \[{{H}_{2}}S{{O}_{4}}\]solution | |
| 1256. |
Colours of flame produced by kerosene lamp, candle and Bunsen burner are respectively |
| A. | Blue, yellow and yellow |
| B. | Yellow, yellow and blue |
| C. | Orange, blue and yellow |
| D. | Yellow, orange and yellow. |
| Answer» C. Orange, blue and yellow | |
| 1257. |
Ravi collected four different types of fuels I, II, in, and IV. He wants to find out which fuel is the most efficient among the fuels he has collected. He bums 1.2 kg of I, 4 kg of II, 3.2 kg of III, and 2.4 kg of IV completely. He found out that the heat produced by complete burning of I, II, III, and IV is 7200 kJ, 32000 kJ, 12800 kJ, and 16800 kJ respectively. From this experiment, he concluded that _i_ is the most efficient fuel and its calorific value is _ii_. The information in which alternative completes the given statement? |
| A. | i-I, ii-5000 kJ/ kg |
| B. | i-II, ii-8000 kJ/ kg |
| C. | i-II, ii-6000 kJ/ kg |
| D. | i-IV, ii-8000 kJ/ kg |
| Answer» C. i-II, ii-6000 kJ/ kg | |
| 1258. |
Which one of the following is not a region of biosphere reserve? |
| A. | Buffer |
| B. | Core |
| C. | Manipulation |
| D. | Transition |
| E. | None of these |
| Answer» D. Transition | |
| 1259. |
Which one of the following national park contained in Pachmarhi Biosphere Reserve? |
| A. | Corbett National Park |
| B. | Satpura National Park |
| C. | Gir National Park |
| D. | Kaziranga National Park |
| E. | None of these |
| Answer» C. Gir National Park | |
| 1260. |
Which of the following structures regulate cell division in animal cells? |
| A. | Chromosomes |
| B. | Chromatin |
| C. | Centrosome |
| D. | Spindle fibrils |
| Answer» D. Spindle fibrils | |
| 1261. |
Consider the given statements and select the option which correctly identifies true (T) and false (F) ones.(i) Kanha National Park is the first reserve forest of India.(ii) Kaziranga National Park is famous for rhinoceros.(iii) The existence of endemic species is often threatened due to the introduction of exotic species from some other geographical area.(iv) Botanical garden is an in situ method of biodiversity conservation. |
| A. | (i)(ii)(iii)(iv)FTTF |
| B. | (i)(ii)(iii)(iv)FTFF |
| C. | (i)(ii)(iii)(iv)TFTF |
| D. | (i)(ii)(iii)(iv)FTTT |
| Answer» B. (i)(ii)(iii)(iv)FTFF | |
| 1262. |
Which of the following organelles differentiate between plant cell and animal cell? (i) Cytoplasm (ii) Nucleus (iii) Cell wall (iv) Large vacuole |
| A. | (i) and (ii) only |
| B. | (i) and (iii) only |
| C. | (ii) and (iv) only |
| D. | (iii) and (iv) only |
| Answer» E. | |
| 1263. |
Which one of the following eye parts can change the focal length of the eye-lens according to the requirements of the eye to see distant objects or nearby objects? |
| A. | Retina |
| B. | Ciliary muscles |
| C. | Pupil |
| D. | Cornea |
| E. | None of these |
| Answer» C. Pupil | |
| 1264. |
The nucleus and the cytoplasm together are known as: |
| A. | Nucleoplasm |
| B. | Cytoplasm |
| C. | Protoplasm |
| D. | Chloroplast |
| E. | None of these |
| Answer» C. Protoplasm | |
| 1265. |
Choose the correct option for labelling the given figure of an animal cell. |
| A. | a - membrane, b - golgi body, c - mitochondria, d - nucleus.. |
| B. | a - cell membrane b - nucleus, c - mitochondria, d - golgi body |
| C. | a - cell wall, b - nucleus, c - mitochondria, d - golgi body. |
| D. | a - cell wall, b - golgi body; c - mitochondria, d - nucleus. |
| E. | None of these. |
| Answer» C. a - cell wall, b - nucleus, c - mitochondria, d - golgi body. | |
| 1266. |
Which of the following circuits gives the correct way of connecting an LED to light it up? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 1267. |
Which one of the following is not a petroleum product? |
| A. | Coal |
| B. | Gasoline |
| C. | Diesel |
| D. | Petroleum gas |
| E. | None of these |
| Answer» B. Gasoline | |
| 1268. |
The petroleum product which has boiling point between \[150-250{}^\circ C\] is: |
| A. | Light oil |
| B. | Petroleum gas |
| C. | Kerosene |
| D. | Gasoline |
| E. | None of these |
| Answer» D. Gasoline | |
| 1269. |
Destructive distillation of coal is done to produce: |
| A. | Coke |
| B. | Coal tar |
| C. | Coal gas |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 1270. |
Which of the following is/are factors that pose a great threat to biodiversity? |
| A. | Habitat destruction |
| B. | Disturbance and introduction of alien species |
| C. | Man's interference with nature |
| D. | All of these |
| Answer» E. | |
| 1271. |
Which of the following is an abiotic component? |
| A. | Cow |
| B. | Grass |
| C. | Temperature |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 1272. |
The table given below has certain terms and five spaces named a, b, c, d and e. Cell Feature/Part Function Bacteria plant cell C E A Chloroplast Spindle shaped Selectively permeable Movement B D Protect the cell from its surroundings From the options given below choose the correct Combination of terms. |
| A. | A - pseudopodia, B - respiration, C - muscle cell, D - expansion, E - nucleus. |
| B. | A - flagella, B - photosynthesis, C - nerve cell, D - contraction, E - cell vacuole. |
| C. | A - cilia, B - reproduction, C - blood cell, D - contraction, E - nucleus. |
| D. | A - flagella, B - photosynthesis, C - muscle cell, D - contraction, E - cell membrane. |
| E. | None of these |
| Answer» E. None of these | |
| 1273. |
Which of the following is the longest cell in human body? |
| A. | Nerve cells |
| B. | Muscle cells |
| C. | Bone cells |
| D. | Gland cells |
| Answer» B. Muscle cells | |
| 1274. |
Which of the following is the correct combination? |
| A. | Lysosomes - Intracellular digestion |
| B. | Microtubules ? Respiration |
| C. | Mitochondria - Cell secretion |
| D. | Golgi complex ? Energy |
| Answer» B. Microtubules ? Respiration | |
| 1275. |
A spoon is kept in contact with ice cubes for some time. Later, the same spoon was held over the flame of a small candle. The observation is shown in the figure.What do you infer from the given figure? |
| A. | Spoon is an inflammable substance. |
| B. | Burning of candle is a spontaneous process. |
| C. | Carbon dioxide is a product of combustion. |
| D. | Water vapour is a product of combustion. |
| Answer» E. | |
| 1276. |
A certain gas is used by living organisms for respiration, and this is used in the process of combustion. In the process of combustion, the gas reacts with combustible substances to produce heat. The mentioned gas is |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» B. Nitrogen | |
| 1277. |
What is iron coated with in order to protect it from corrosion and rust? |
| A. | Tin |
| B. | Copper |
| C. | Zinc |
| D. | Mercury |
| Answer» D. Mercury | |
| 1278. |
Where does natural gas occur? |
| A. | Above petroleum oil |
| B. | Below petroleum oil |
| C. | Along with petroleum oil |
| D. | Inside volcanic mountains |
| Answer» B. Below petroleum oil | |
| 1279. |
A How is coke superior than coal as a fuel? |
| A. | Coal is a mineral and burns releasing smoke while coke is a residue. |
| B. | Coal is an impure form of carbon, while coke is a pure form of carbon. |
| C. | Only coal consists of atoms of carbon, hydrogen, oxygen and sulphur while coke mainly consists of carbon. |
| D. | All of the above |
| Answer» E. | |
| 1280. |
Which one of the following is present in animal, plant and bacterial cell? |
| A. | Chloroplast |
| B. | Cell wall |
| C. | Nucleus |
| D. | Cell membrane |
| E. | None of these |
| Answer» E. None of these | |
| 1281. |
Shefali accidentally touched a glass of hot water and immediately withdrew her hand back. She reacted on sensing the heat due to: |
| A. | Liver cells |
| B. | Skin surface |
| C. | Heart cells |
| D. | Nerve cells |
| E. | None of these |
| Answer» E. None of these | |
| 1282. |
What is a major cause of global warming? |
| A. | Gaseous nitrogen oxides released by petrol engines |
| B. | Oxides of sulphur and nitrogen dissolved in rain water |
| C. | Emission of sulphur dioxide on combustion of coal |
| D. | Release of carbon dioxide on combustion of fuels |
| Answer» E. | |
| 1283. |
Match column I with column II and choose the correct option from the codes given below.Column I (Amorphous forms of carbon)Column II (Uses)(P) Lamp black(i) For making electrodes for dry cell.(Q) Bone Charcoal(ii) In gas masks(R) Wood charcoal(iii) In extraction of metals(S) gas carbon(iv) To remove colour from sugarcane juice(T) Coke(v) For making black shoe polish |
| A. | PQRST(i)(v)(iii)(ii)(iv) |
| B. | PQRST(v)(iv)(ii)(iii)(i) |
| C. | PQRST(ii)(iii)(iv)(i)(v) |
| D. | PQRST(v)(iv)(ii)(i)(iii) |
| Answer» E. | |
| 1284. |
Which petroleum product is used for road surfacing? |
| A. | Coal tar |
| B. | Paraffin wax |
| C. | Bituminous |
| D. | Diesel |
| E. | None of these |
| Answer» D. Diesel | |
| 1285. |
Gases present in coal gas are: |
| A. | Hydrogen |
| B. | Methane |
| C. | Carbon monoxide |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 1286. |
Cleanest fuel among the following is: |
| A. | Kerosene |
| B. | Petrol |
| C. | Cow dung cakes |
| D. | Hydrogen gas |
| E. | None of these |
| Answer» E. None of these | |
| 1287. |
Match the following: Column A Column B (i) Mudumalai wildlife sanctuary [A] Rajasthan (ii) Satkosia Basipalli wildlife sanctuary [B] Madhya Pradesh (iii) Bharatpur bird sanctuary [C] West Bengal (iv) Bori wildlife sanctuary [D] Tamil Nadu |
| A. | (i - D), (ii - A), (iii - B), (iv - C) |
| B. | (i - D), (ii - C), (in - A), (iv - B) |
| C. | (i - C), (ii - D), (iii - A), (iv - B) |
| D. | (i - A), (ii - C), (iii - D), (iv - B) |
| E. | None of these |
| Answer» C. (i - C), (ii - D), (iii - A), (iv - B) | |
| 1288. |
Which of the following factors affect the existence of endemic species? |
| A. | Destruction of forests |
| B. | Introduction of new species |
| C. | Increasing human population in the vicinity of forest reserves. |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 1289. |
Which of the following has the characteristics of a good fuel? |
| A. | Coke |
| B. | Butane |
| C. | Coal |
| D. | Kerosene |
| Answer» C. Coal | |
| 1290. |
Which of the following are living resources in nature? |
| A. | Flora |
| B. | Fauna |
| C. | Soil |
| D. | Both (A) and (B) |
| Answer» E. | |
| 1291. |
Which of the following is absent in an animal cell? |
| A. | Cytoplasm |
| B. | Nucleus |
| C. | Cell membrane |
| D. | Cell wall |
| Answer» E. | |
| 1292. |
How has the use of CNG in automobiles reduced the pollution in cities? |
| A. | It produces less amount of sulphur dioxide and chlorine. |
| B. | It does not leave any residue or smoke after burning in the engine. |
| C. | It produces large amount of carbon dioxide. |
| D. | It is used in compressed form. |
| Answer» C. It produces large amount of carbon dioxide. | |
| 1293. |
Which of the following is/are the green plastids? |
| A. | Carotenoids |
| B. | Xanthophyll |
| C. | Chloroplasts |
| D. | All the above |
| Answer» D. All the above | |
| 1294. |
Read the given paragraph.The cytoplasm of the cells of a tomato plant contains organelle X having different pigments. Pigment Y present in leaves of plant and impart green colour whereas pigment Z present in fruits of plant and impart red colour. Select the option which correctly identifies X, Y and Z. |
| A. | XYZPlastidLeucoplastChromoplast |
| B. | XYZPlastidChloroplastChromoplast |
| C. | XYZPlastidChloroplastLeucoplast |
| D. | XYZPlastidChromoplastChloroplast |
| Answer» C. XYZPlastidChloroplastLeucoplast | |
| 1295. |
Match the entries in Column I with those in Column II. Column - I Column - II (a) Carbonization (i) Coke (b) Destructive distillation (ii) Coal (c) Cracking (iii) Petroleum (d) Refining (iv) Hydrocarbons |
| A. | a-1, b-2, c-3, d-4 |
| B. | a-2, b-1, c-4, d-3 |
| C. | a-3, b-2, c-4, d-1 |
| D. | a-4, b-3, c-2, d-1 |
| Answer» C. a-3, b-2, c-4, d-1 | |
| 1296. |
A What are the most common sources of energy used in automobiles? |
| A. | Wood and coal |
| B. | Petroleum and diesel |
| C. | LPG and cow dung |
| D. | Natural gas and coal |
| Answer» C. LPG and cow dung | |
| 1297. |
Which of the following substances is non- combustible? |
| A. | Wood |
| B. | Biogas |
| C. | Kerosene oil |
| D. | A piece of stone |
| Answer» E. | |
| 1298. |
Raman is standing at a distance of 2.5m from a plane mirror, how far he would be from his image? |
| A. | 2.5m |
| B. | 5m |
| C. | 3m |
| D. | 1m |
| E. | None of these |
| Answer» C. 3m | |
| 1299. |
____ is the screen on which the image is formed in the eye. |
| A. | Iris |
| B. | Pupil |
| C. | Retina |
| D. | Eye-lens |
| E. | None of these |
| Answer» D. Eye-lens | |
| 1300. |
______ adjusts the size of ____ according to the intensity of light received by the eye from the surroundings. |
| A. | Retina, pupil |
| B. | Iris, retina |
| C. | Iris, pupil |
| D. | Pupil, Iris |
| E. | None of these |
| Answer» D. Pupil, Iris | |