Practice Question and Answer
8 Q: While travelling downstream, a man can row 16 km more in 4 hours as compared to travelling upstream. What is the speed of the stream?
2204 062b33481fbadac125c6d0edf
62b33481fbadac125c6d0edf- 11.5 km/hfalse
- 21 km/hfalse
- 32 km/htrue
- 41.25 km/hfalse
- 5None of thesefalse
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Answer : 3. "2 km/h"
Q:Select the option that expresses the given sentence in passive voice.
We can buy books online from Amazon.
2203 0649571bbc7d7c7e0671d88ea
649571bbc7d7c7e0671d88ea- 1Books were to be bought online from Amazon.false
- 2Books are bought online from Amazon.false
- 3Books can be bought online from Amazon.true
- 4Books could be bought online from Amazon.false
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Answer : 3. "Books can be bought online from Amazon. "
Q: Who founded "Shantabai Shiksha Kutir"?
2203 0639af5bac0ba0122ec96c394
639af5bac0ba0122ec96c394- 1Ratan Shastritrue
- 2Narayani Devifalse
- 3Vijaya Devifalse
- 4Rama Baifalse
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Answer : 1. "Ratan Shastri "
Q: One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture. 2203 05b5cc75ee4d2b4197774fcc0
5b5cc75ee4d2b4197774fcc0- 127 %true
- 226 %false
- 329 %false
- 421 %false
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Answer : 1. "27 %"
Explanation :
Answer: A) 27 % Explanation: Let the percentage of benzene = X(30 - X)/(X- 25) = 6/4 = 3/2 => 5X = 135 X = 27 So, required percentage of benzene = 27 %
Q: Which of the following statements is not correct about Sunder Lal Bahuguna?
2202 0601bcd8266813962b2271306
601bcd8266813962b2271306- 1He is an eminent environmentalistfalse
- 2He was awarded Padma Bhushan in 2009false
- 3He started the ‘Chipko Movement’ to create awareness of deforestationfalse
- 4He was elected to Lok Sabha from Uttarkashi in Uttarakhandtrue
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Answer : 4. "He was elected to Lok Sabha from Uttarkashi in Uttarakhand"
Q: Vega roped in whom as brand ambassador?
2202 05f968cafeed3d00d4bc364d5
5f968cafeed3d00d4bc364d5- 1Virat Kohlifalse
- 2Rohit Sharmatrue
- 3Jasprit Bumrahfalse
- 4Brett leefalse
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Answer : 2. "Rohit Sharma"
Q: Is rusting a physical or chemical change? 2202 05b5cc658e4d2b4197774bdfc
5b5cc658e4d2b4197774bdfc- Show AnswerHide Answer
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Answer :
Explanation :
In chemistry rusting is called as oxidation. Oxidation is a chemical process where metal gains oxygen and become oxide. In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust. The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.
Q: Permanent hardness of water may be removed by the addition of
2202 05edefcd28c4c964f73d38693
5edefcd28c4c964f73d38693- 1sodium carbonatetrue
- 2alumfalse
- 3potassium permanganatefalse
- 4limefalse
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