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SCIENCE BY PRIYA MAM

Que 1- Linseed is a rich source of ?

(A) Vitamin B

(B) Vitamin C

(C) Omega 3 fatty acid

(D) Protein

Que 1- अलसी एक समदृ्ध स्रोत है?(A) विटाममन बी(B) विटाममन सी(C) ओमेगा 3 फैटी एमसड(D) प्रोटीन

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Explanation Flax Seeds Are High in Omega-3 Fats

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Ans. Omega 3 fatty acid

Que 2- Which one of the following is not a protein ?

(A) Keratin

(B) Fibrinogen

(C) Collagen

(D) oxytocin

Que 2- ननम्नमलखित में से कौन साप्रोटीन नहीीं है?(A)केराटटन(B)फाइब्रिनोजेन(C)कोलेजन(D) ऑक्सीटोमसन USE CODE

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Ans. Oxytocin

Oxytocin is a hormone that acts on organs in the body and as a chemical messenger in the brain, controlling key aspects of the reproductive system, including childbirth and lactation, and aspects of human behaviour.

It is also known as love hormone

Que 3- Pulses are good source of ?

(A) Vitamin

(B) Fats

(C) Carbohydrates

(D) Proteins

Que 3- दलहन का अच्छा स्रोत हैं?(A)विटाममन(B) िसा(C) काबोहाइड्रटे(D) प्रोटीन

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Explanation• Pulses are a low fat source

of protein with high levels of protein and fibre. Pulses also contain important vitamins and minerals like iron, potassium and folate.

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Ans. Protein

Que 4- Ergotism is due to consumption of ?

(A) Contaminated Grains

(B) Rotting Vegetables

(C) Contaminated Water

(D) Safe Cook food

Que 4- िपत ककसके कारण होती है?(A)दवूित अनाज(B) सड़ने िाली सब्जजयााँ(C) दवूित पानी(D) सरुक्षित कुक भोजन

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Explanation

Copper sulfate, also known as cupric sulfate or copper shat differ in their degree of hydration

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Ans. Contaminated Grains

Poisoning produced by eating food affected by ergot is known ergotism. It causes headache, vomiting, diarrhea, and

gangrene of the fingers and toes traditionally due to the ingestion of the alkaloids produced by the Claviceps

purpurea fungus

Que 5- The food conducting tissue of a plant is ?

(A) Xylem

(B) Pholem

(C) Parencyma

(D) Collenchyma

Que 5- पौधे का भोजन सींिाहक ऊतकहै?(A)पौधे का जाइलम (B) ऊतकों से सींबद्ध छाल(C) पररत्यक्ता(D) कोलेनकाइमा USE CODE

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Explanation

Vinegar is essentially a dilute solution of acetic (ethanoic) acid in water. Acetic acid is produced by the oxidation of ethanol by acetic acid bacteria, and, in

most countries, commercial production involves a double fermentation where the ethanol is produced by the fermentation of sugars by yeast.

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Ans. Pholem

Xylem tissue is used mostly for transporting water from roots to stems and leaves but also transports

other dissolved compounds. Phloem is responsible for transporting food produced from photosynthesis from leaves to non-photosynthesizing parts of a plant such

as roots and stems.

Que 6- Cockroach Cannot survive in water because its respiratory organ is ?

(A) Trachea

(B) Book Lungs

(C) Pulmonary sac

(D) GillsQue 6- कॉकरोच पानी में जीवित नहीीं रह सकता क्योंकक उसका श्िसन अींग है?(A)टे्रककआ(B)बुक लींग्स(C)पल्मोनरी थलैी(D) गलफड़े

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Explanation

Vinegar is essentially a dilute solution of acetic (ethanoic) acid in water. Acetic acid is produced by the oxidation of ethanol by acetic acid bacteria, and, in

most countries, production involves a double fermentation where the ethanol is produced by the fermentation of sugars by yeast.

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In insects like cockroaches, grasshopper, transportation of gas or gaseous exchange take place by a special type of

fine tubes is called tracheae. Air containing oxygen

enters through spiracles into the tracheal tubes. It then diffuses into the body tissue and reaches every cell in the body.

Ans. Trachea

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Que 7- Which of the following is an egg lying mammal

(A) Bat

(B) Whale

(C) Leafy ant-eater

(D) Spiny ant-eaterQue 7- ननम्नमलखित में से कौन सा एक अींडाकार स्तनपायी है(A)चमगादड़(B)व्हेल(C) पत्ती विरोधी भिक(D) स्पाइनी चीींटी-भिक

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Ans. Spiny Ant-eater

There are only five living monotreme species: the duck-billed platypus and four species of echidna (also known as

spiny anteaters). All of them are found only in Australia and New Guinea.

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Que 8-Study of atmospheric Phenomenon is called ?

(A) Meterology

(B) climateology

(C) Seismology

(D) AstrologyQue- 8 िायमुींडलीय घटना के अध्ययन को कहा जाता है ?

(A)मीटरोलॉजी(B)जलिाय ुविज्ञान(C)सीस्मोलॉजी(D) ज्योनति विज्ञान

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Ans. Meterology

Meteorology is the study of the atmosphere, atmospheric phenomena, and atmospheric effects on our weather.

Seismologists study earthquakes by going out and looking at the damage

caused by the earthquakes and by using seismographs. A seismograph is

an instrument that records the shaking of the earth's surface caused by

seismic waves.

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Que 9-Stars twinkle but planet do not twinkle because

(A) They emit light of constant velocity

(B) Their distance from the earth does not changhe with time

(C) They are very far away from the earth resulting in decrease in intensity of light

(D) They are nearer to the earth and hence we receive a greater amount of light and minor variation in intensity are not noticeble

Que 9-मसतारे टविींकल लेककन ग्रह क्योंकक टविींकल नहीीं करते हैं(A)िे ननरींतर िेग के प्रकाश का उत्सजजन करते हैं(B) पथृ्िी से उनकी दरूी समय के साथ बदल नहीीं जाती है(C) िे प्रकाश की तीव्रता में कमी के पररणामस्िरूप पथृ्िी से बहुत दरू हैं(D) िे पथृ्िी के ननकट हैं और इसमलए हमें प्रकाश की अधधक मात्रा प्राप्त होती है और तीव्रता में मामूली मभन्नता ध्यान देने योग्य नहीीं है

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Ans. They are very far away

from the earth resulting in decrease in

intensity of light

•Planets are closer to Earth and so appear as tiny disks in our sky. The light from these little disks is also refracted by Earth's atmosphere, as it

travels toward our eyes. .Therefore, the light coming from our solar system's planets does not appear to twinkle like stars.

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Que 10-The choke used with tubelight is basically

(A) An inductor

(B) Transformer

(C) Resistor

(D) CapacitorQue 10-टयूबलाइट के साथ इस्तेमाल ककया जाने िाला चोक मूल रूप से है(A)एक प्रारींभ करनेिाला(B) ट्राींसफामजर(C) ररमसस्टर(D) सींधाररत्र USE CODE

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Ans. An inductor

choke is the Inductor coil/ballast which is used to induce high voltage across it. Then gas inside the starter gets ionized due to this full voltage and heats the bimetallic strip that is caused to be bent to connect to the fixed contact.

चालकता सींधाररत्र

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Que 11-Device used to convert AC into DC.?

(A) Ammeter

(B)Rectifier

(C) Transformer

(D) Galvanometer

Que 11-AC को DC में बदलने के मलए ककसउपकरण का उपयोग ककया जाता है?(A)एममीटर(B)रेब्क्टफायर(C) ट्राींसफामजर(D) गैल्िेनोमीटर

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Ans. Rectifier

A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct

current (DC), which flows in only one direction.

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Que 12-Why does ice covered Sawdust does not melt quickly?

(A) Sawdust is a bad conductor of heat

(B)The water is absorbed by sawdust

(C) Sawdust is a good conductor of heat

(D) None

Que 12- चरूा से ढकी बफज जल्दी क्यों नहीीं वपघलती?(A)चरूा गमी का एक बुरा कीं डक्टर है(B)पानी चरूा द्िारा अिशोवित ककया जाता है(C)चरूा गमी का एक अच्छा कीं डक्टर है(D) कोई नहीीं

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Ans. Sawdust is a bad conductor of

heat

Because , when ice is kept on saw dust then it does not melt quickly as its an insulator of heat and air does not circulate in good

insulators . So , it prevents ice from melting quickly . The saw dust acts as an insulator and does not pass the surrounding heat

to ice and thus prevents it from melting

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Que 13-Five equal forces of 10 Newton are applied at one point and all are lyingin one plane.If angle between them are equal,the resultant of force will be?

(A) Zero

(B)10 N

(C) 20 N

(D) 100 N

Que 13 - 10 न्यूटन के पाींच-समान बल एक ब्रब ींद ुपर लगाए जाते हैं और सभी एक विमान में पड़ ेहोते हैं। यटद उनके बीच का कोण समान है, तो बल का पररणाम क्या होगा?(A)शून्य(B) 10 N

(C) 20 N

(D) 100 NUSE CODE

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Explanation

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Ans. Zero

If the angle between all forces which are equal and lying in one plane are equal, then resultant force will be zero.

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Que 14-Washing machine works on the principle of?

(A) Centrifugal force

(B) Centripetal force

(C) Both

(D) None

14-िॉमशींग मशीन ककसके मसद्धाींत पर काम करती है?(A)केन्रपसारक बल(B)सेंटट्रपेटल बल(C) दोनों(D) कोई नहीीं

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Ans. Centrifugal force

The working principle of a washing machine is centrifugation. Centrifugation is a separation process which uses the

action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture.

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Que 15- The gas used in the manufacture of Vanaspatighee from Vanaspati ol is ?

(A) Nitrogen

(B) Helium

(C) Hydrogen

(D) Chlorine

Que 15- िानस्पनत तेल से िानस्पनत घी के ननमाजण में प्रयकु्त होने िाली गैस है?(A)नाइट्रोजन(B)हीमलयम(C) हाइड्रोजन(D) क्लोरीन USE CODE

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Explanation

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Ans. Hydrogen

Hydrogen gas is used in the manufacture of Vanaspati Ghee

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Que 16- Which of the following is also called Stranger gas ?

(A) Xenon

(B) Argon

(C) Neon

(D) Nitrous oxide

Que 16- ननम्न में से ककसे स्ट्रेंजर गैस भी कहा जाता है?(A)क्सीनन(B) आगजन(C) ननयॉन(D) नाइट्रस ऑक्साइड USE CODE

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Ans. Xenon

Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in

Earth's atmosphere in trace amounts

Xenon is used in photographic flashes, in high pressure arc lamps

for motion picture projection, and in high pressure arc lamps to produce

ultraviolet light. It is used in instruments for radiation

detection

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Que 17- Baking soda is ?

(A) Calcium carbonate

(B) Sodium carbonate

(C) Baking Soda

(D) Hydrogen oxide

Que 17- बेककीं ग सोडा है?(A)कैब्ल्शयम काबोनेट(B) सोडडयम काबोनेट(C) बेककीं ग सोडा(D) हाइड्रोजन ऑक्साइड

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Ans. Sodium carbonate

Baking soda is a leavening agent used in baked goods like cakes, muffins, and cookies. Formally

known as sodium bicarbonate, it's a white crystalline powder that is naturally alkaline, or

basic

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Que 18- Which of the following was used as a chemical

Weapon in the first world war ?

(A) Mustard gas

(B) Carbon monooxide

(C) Water Gas

(D) Hydrogen cyanide

Que 18- ननम्नमलखित में से ककसका उपयोग रासायननक के रूप में ककया गया थाप्रथम विश्ि युद्ध में हधथयार?(A)सरसों गैस(B) काबजन मोनोऑक्साइड(C)पानी गैस(D) हाइड्रोजन साइनाइड USE CODE

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Ans. Mustard gas

The most widely reported chemical agent of the First World War was sulfur mustard, known as "mustard

gas"

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Que 19- Which of the following chemical is used in fruit ripening ?

(A) Ethephon

(B) Atrazine

(C) Malathion

(D) None

Que 19- फलों के पकने में ननम्न में से ककस रसायन का उपयोग ककया जाता है?(A)एथेफोन(B) एट्राजीन(C) मेलाधथयान(D) कोई नहीीं

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Ans. Ethephon

Explanation

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Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is similar in its effects to the natural ripening agent, ethylene. Acetylene

accelerates the ripening process.

Ethephon is a plant growth regulator used to promote fruit ripening, abscission, flower induction, and other responses. Ethephon is

registered for use on a number of food, feed and nonfood crops, greenhouse nursery stock, and outdoor residential ornamental

plants, but is used primarily on cotton

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Que 20- Which of the following is not a natural polymer ?

(A) Nylon

(B) Wool

(C) Leather

(D) Silk

Que 20- ननम्नमलखित में से कौन सा एक प्राकृनतक बहुलक नहीीं है?(A)नायलॉन(B) ऊन(C) चमड़ा(D) रेशम

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Ans. Nylon

Explanation

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Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic

polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. It is made of

repeating units linked by amide links similar to the peptide bonds in proteins.