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Which planet has the longest day in our solar system? हमारे सौर मंडल में कौन से ग्रह पर सबसे लंबें दिन होते है? |
| A) Mercury
/बुध
B) Saturn
/शनि
C) Venus
/शुक्र
D) Earth
/पृथ्वी
Correct Answer : Venus /शुक्र Explanation : Venus has the longest day of any planet in our solar system. It completes one rotation every 243 days of the earth. |
Laughing gas is also called as? हँसाने वाली गैस है? |
| A) Hydrogen dioxide
/हाइड्रोजन डाइऑक्साइड
B) Sulphur dioxide
/सल्फर डाइऑक्साइड
C) Hydrogen peroxide
/हाइड्रोजन पेरोक्साइड
D) Nitrous oxide
/नाइट्रस ऑक्साइड
Correct Answer : Nitrous oxide /नाइट्रस ऑक्साइड Explanation : Nitrous oxide(N2O), also called dinitrogen monoxide, laughing gas, or nitrous, is a chemical compound with the formula N2O. At room temperature, it is a colorless, odorless non-flammable gas with a slightly sweet taste. It is used in surgery and dentistry for its anaesthetic and analgesic effects. |
Which Pigment in the skin of human beings protects the body from U.V radiation of Sun? मनुष्य की त्वचा में कौन सा वर्णक सूर्य के पराबेंगनी विकिरण से शरीर की रक्षा करता है? |
| A) Haemoglobin /हीमोग्लोबिन B) Chlorophyll /क्लोरोफिल C) Melanin /मेलेनिन D) Thyroxine /थायरोक्सिन Correct Answer : Melanin /मेलेनिन Explanation : In human skin, melanin are pigments that color our eyes, hair and skin. Melanin darkens the skin and acts as a barrier to the sun.It is an effective absorbent of light and able to absorbed 99.9% UV radiation. |
Which pollutant is present in Cigarette smoke? मनुष्य की त्वचा में कौन सा वर्णक सूर्य के पराबेंगनी विकिरण से शरीर की रक्षा करता है? |
| A) NO2 B) Hb C) CO D) All of these Correct Answer : CO Explanation : Cigarette smoke contains thousands of chemical compounds. Some of the chemicals found in tobacco smoke include- Nicotine |
Smallpox, cholera, tuberculosis(TB) and dysentery diseases are caused by? चेचक, हैजा, टी.बी और दस्त रोग के कारण है? |
| A) Air pollution /वायु प्रदूषण B) Soil Pollution /मृदा प्रदूषण C) Water pollution /जल प्रदूषण D) Noise pollution /ध्वनी प्रदूषण Correct Answer : Water pollution /जल प्रदूषण |
Vacuum cleaner was invented by ? वैक्यूम क्लीनर का आविष्कार किसने किया था? |
| A) William Cooke B) Hubert Cecil Booth C) Baltzar Von Platen D) Carl Munters Correct Answer : Hubert Cecil Booth Explanation : Hubert Cecil Booth (1871 - 1955) was a British engineer who and inventor of the first powered vacuum cleaner. |
Study of 'Old age and Aging' is known as ? 'वृद्धावस्था और बुढ़ापा' के अध्ययन के रूप में जाना जाता है? |
| A) Oncology B) Gerontology C) Teratology D) Recrology Correct Answer : Gerontology Explanation : Gerontology is the study of aging and older adults. It includes, the study of physical, mental, and social changes in older people as they age. |
Nitrous Oxide is popularly known as? नाइट्रस ऑक्साइड को लोकप्रिय रूप में जाना जाता है? |
| A) Tear gas B) Cleanser gas C) Laughing gas D) Deoxidiser gas Correct Answer : Laughing gas Explanation : Nitrous oxide(N2O), also called dinitrogen monoxide, laughing gas, or nitrous, is a chemical compound with the formula N2O. At room temperature, it is a colorless, odorless non-flammable gas with a slightly sweet taste. It is used in surgery and dentistry for its anaesthetic and analgesic effects. |