441. Who among the following sportspersons is one of the Arjuna Award 2021 winners?
निम्नलिखित खिलाड़ियों में से कौन अर्जुन पुरस्कार 2021 विजेताओं में से एक है?
1. Vikas Kumar
2. Nishad Kumar
3. Bajrang Punia
4. P V Sindhu
Option “2” is correct. From the given options, Nishad Kumar is one of the Arjuna Award 2021 winners. Nishad Kumar is an Indian Paralympian and high jumper. He won a Silver medal in the 2020 Tokyo Paralympics.
442. Which phylum of the plant kingdom consists of vascular plants, leaves (known as fronds), roots and sometimes true stems and entire trunks in tree ferns?
पादप साम्राज्य के किस संघ में संवहनी पौधे, पत्तियाँ (अपुष्प-पर्ण के रूप में जाने जाते हैं), जड़ें और कभी-कभी सच्चे तने और पेड़ के फर्न में पूरे तने होते हैं?
Option “2” is correct. Petridophyta consists of vascular plants, leaves (known as fronds), roots and sometimes true stems and entire trunks in tree ferns. Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity.
443. Who observed that in a mixture of non-reactive gases, the total gas pressure is equal to the sum of the partial pressures of the individual gases?
किसने देखा कि गैर-प्रतिक्रियाशील गैसों के मिश्रण में, कुल गैस का दाब अलग-अलग गैसों के आंशिक दाबों के योग के बराबर होता है?
1. Antoine Lavoisier
2. John Dalton
3. Amedeo Avogadro
4. Robert Boyle
Option “2” is correct. John Dalton observed that in a mixture of non-reactive gases, the total gas pressure is equal to the sum of the partial pressures of the individual gases. John Dalton was an English chemist, physicist and meteorologist. He is best known for introducing the atomic theory into chemistry.
Option “4” is correct. Hydrological Cycle shows the movement of water. The water cycle, also known as the hydrologic cycle or the hydrological cycle, is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth.
445. Which of the following pairs is NOT correctly matched?
निम्नलिखित में से कौन सा युग्म सही सुमेलित नहीं है?
Option “1” is correct. Arun Jaitley cricket stadium is located in New Delhi. The Arun Jaitley cricket stadium was established in 1883 as the Feroz Shah Kotla Stadium, and named after the nearby Kotla fort. On 12 September 2019, the stadium was renamed in memory of former DDCA President and Finance Minister Arun Jaitley, after his death on 24 August 2019.
446. The autobiography ‘My Experiments with Truth’ was originally written in which language?
आत्मकथा ‘सत्य के साथ मेरे प्रयोग’ मूल रूप से किस भाषा में लिखी गई थी?
1. English
2. Bengali
3. Gujarati
4. Marathi
Option “3” is correct. The autobiography ‘My Experiments with Truth’ was originally written in Gujarati language. The Story of My Experiments with Truth is the autobiography of Mahatma Gandhi. The original Gujarati version was published as the Satya Na Prayogo bearing the subtitle, Atmakatha.
447. Who among the following secured one of the two silver medals for India at the Tokyo Olympics 2020?
निम्नलिखित में से किसने टोक्यो ओलंपिक 2020 में भारत के लिए दो में से एक रजत पदक हासिल किया?
Option “1” is correct. Ravi Kumar Dahiya secured one of the two silver medals for India at the Tokyo Olympics 2020. He is an Indian freestyle wrestler who won a silver medal at the 2020 Tokyo Olympics in the 57 kg category. In the 2022 Birmingham Commonwealth Games, he won the gold medal in the men’s 57kg freestyle wrestling category at Birmingham, England.
448. Which chemical compound is composed of magnesium, sulphur and oxygen and is commonly used in detox bath to relax muscles and relieve pain in the shoulders, neck, back and scalp?
कौन सा रासायनिक यौगिक मैग्नीशियम, सल्फर और ऑक्सीजन से बना है और आमतौर पर मांसपेशियों को आराम देने और कंधों, गर्दन, पीठ और खोपड़ी में दर्द से राहत देने के लिए डिटॉक्स बाथ में उपयोग किया जाता है?
1. Epsom salt
2. Potash alum
3. Rock salt
4. Glauber’s salt
Option “1” is correct. Epsom Salt is composed of magnesium, sulfur, and oxygen and is commonly used in a detox bath to relax muscles and relieve pain in the shoulders, neck, back, and scalp. The heptahydrate of magnesium sulfate is known as Epsom Salt or bath salt. The chemical formulae of Epsom Salt are MgSO4·7H2O.
449. The term ‘dribble’ is used in which of the following sports?
निम्नलिखित में से किस खेल में ‘ड्रिबल’ शब्द का प्रयोग किया जाता है?
1. Basketball
2. Baseball
3. Badminton
4. Tennis
Option “1” is correct. The term ‘dribble’ is used in Basketball. Dribbling is a repetitive action in which a player uses one hand to bounce the basketball continuously.
450. Which climate zone has an average temperature of over 64°F (18°C) throughout the year and more than 59 inches of rainfall each year?
किस जलवायु क्षेत्र में वर्ष भर औसत तापमान 64°F (18°C) से अधिक रहता है और प्रत्येक वर्ष 59 इंच से अधिक वर्षा होती है?
1. Tropical zone
2. Temperate zone
3. Dry zone
4. Continental zone
Option “1” is correct. The tropical zone has an average temperature of over 64°F (18°C) throughout the year and more than 59 inches of rainfall each year. Tropical climates normally have only two seasons, a wet season and a dry season. The tropics are the regions of Earth surrounding the Equator.
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