Practice Question and Answer
8Q: What is the oxidation number of carbon in NaHCO3? 2052 05b5cc60de4d2b4197774b627
5b5cc60de4d2b4197774b627- 1-4false
- 2-3false
- 3+4true
- 4+2false
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Answer : 3. "+4"
Explanation :
Answer: C) +4 Explanation: The given compound is NaHCO3 Sodium bicarbonate which is commonly known as Baking soda. Oxidation numbers are the charges on ions. When a neutral atom loses electrons it becomes positively charged. When a neutral atom gains electrons it becomes negatively charged. Here the C represents the oxidation state of carbon in this compound. Compounds are electrically neutral, which is why we set the sum of the oxidation states equal to zero. Sodium has a +1 oxidation state. Hydrogen has a +1 oxidation state. Oxygen has a -2 oxidation state. There are three oxygen atoms, which means the total oxidation state provided by both oxygen ions is -6. Adding up these oxidation states we get: 1 + 1 + (-6) + C = 0 -4 + C = 0 => C = 4 This means the oxidation state of carbon in this compound is +4.
Q: In the given figure , DE‖BC and AD:DB=5:3, then what is the value of DE|BC?
2052 05da80da4b247ec0cc95f0e4d
5da80da4b247ec0cc95f0e4d- 1$${5\over8} $$true
- 2$${2\over3} $$false
- 3$${3\over4} $$false
- 4$${5\over3} $$false
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Answer : 1. "$${5\over8} $$"
Q: According to IMF, Which of the followings is India's Projected Growth in 2019?
2052 05da03f9177652578d4ef96f3
5da03f9177652578d4ef96f3- 17.2%false
- 27.4%true
- 36.5%false
- 48.2%false
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Answer : 2. "7.4%"
Q:Directions : In each of the following sentences, there is a blank space. Below in each sentence, there are five words out of which one can be used to fill the blank to make the sentence grammatically and coherently correct. Find the most appropriate word that fit into the blank contextually.
The law _________ farmers not only to save and resow (multiply) seeds, but also to sell them to other farmers, no matter what the original source of the seed is.
2052 0617bd56bea87e15376b36b33
617bd56bea87e15376b36b33- 1covertsfalse
- 2implementsfalse
- 3emitsfalse
- 4permitstrue
- 5desertsfalse
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Answer : 4. "permits "
Q: Sohan walked 4 km. away in the North from a particular point, then he walked 3 km to the right and finally, 7 km. in the right. In which direction is he now with respect to the starting point?
2051 05d27052ed6d84865990461d6
5d27052ed6d84865990461d6- 1North-Eastfalse
- 2South-Easttrue
- 3Eastfalse
- 4South-Westfalse
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Answer : 2. "South-East"
Q: Which state has launched the Mission Shakti sports initiative?
2051 25d777e09a1321a5b0b599ecd
5d777e09a1321a5b0b599ecd- 1Maharashtratrue
- 2Rajasthanfalse
- 3Assamfalse
- 4Andhra Pradeshfalse
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Answer : 1. "Maharashtra"
Q: Who among the following Sikh Gurus had laid the foundation of Amritsar?
2051 15d7b6ca439090829bc364bd2
5d7b6ca439090829bc364bd2- 1Guru Amar Dasfalse
- 2Guru Ram Dastrue
- 3Guru Arjan Devfalse
- 4Guru Har Govindfalse
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Answer : 2. "Guru Ram Das"
Q: The distance between two cities A and B is 330 km. A train starts from A at 8 a.m. and travels towards Bat 60 km / hr. Another train starts from Bat 9 a.m. and travels towards A at 75 km/hr. At what time do they meet?
2051 05dc2985b96420169a021fda4
5dc2985b96420169a021fda4- 110 : 00 amfalse
- 210 : 30 amfalse
- 311 : 00 amtrue
- 411 : 30 amfalse
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