Practice Question and Answer
8Q: What is the oxidation number of carbon in NaHCO3? 1731 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: There is a clock which shows false timing ie it shows 20 minutes less for each 1 hour. If the clock shows 12 noon now how many minutes will be lost when it shows 2 pm ? 1731 05b5cc728e4d2b4197774f71e
5b5cc728e4d2b4197774f71e- 136 minutesfalse
- 248 minutesfalse
- 335 minutesfalse
- 460 minutestrue
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Answer : 4. "60 minutes"
Explanation :
Answer: D) 60 minutes Explanation: For 1 hour, 20 minutes is slower, then for 06 miuntes - 2 minutes is slower30 minutes - 10 minutesActual time | false time 12 12 01 PM 12:40 PM (20 minutes slower) 02 PM 01:20 PM 03 PM 02:00 PM So, when actual time is 3pm, the false time is 2 pm.So, it loses 60 minutes when it shows 2 pm.
Q: 12 boys decided to constribute Rs. 750 each to an Orphange. Suddenly few of them boys dropped out and consequently the rest had to pay Rs. 150 more. Then the number of boys who dropped out? 1731 05b5cc6b4e4d2b4197774d4a0
5b5cc6b4e4d2b4197774d4a0- 14false
- 26false
- 32true
- 43false
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Answer : 3. "2"
Explanation :
Answer: C) 2 Explanation: Total money decided to contribute = 750 x 12 = 9000 Let 'b' boys dropped The rest paid 150/- more => (12 - b) x 900 = 9000 => b = 2 Hence, the number of boys who dropped out is 2.
Q: The country issuing the world's first paper money? 1731 05ceb7994fd94bc33580b603a
5ceb7994fd94bc33580b603a- 1Japanfalse
- 2Chinatrue
- 3Russiafalse
- 4United State of Americafalse
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Answer : 2. "China"
Q: Statement: A large number of students who have passed their XII Std. terminal examination in the country could not get admission to colleges as the number of seats available are grossly inadequate.Courses of action:a. The evaluation system of XII Std. terminal examination should be made more tough so that fewer students pass the examination.b. The Government should encourage the private sector to open new colleges by providing them land at cheaper rate.c. The rich people should be asked to send their wards to foreign countries for higher studies enabling the needy students to get admission in colleges within the country. 1731 05b5cc75ce4d2b4197774fc7f
5b5cc75ce4d2b4197774fc7f- 1only a and b followsfalse
- 2Only c followsfalse
- 3Only b followstrue
- 4All a, b & c followsfalse
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Answer : 3. "Only b follows"
Explanation :
Answer: C) Only b follows Explanation: Clearly, reducing the number of aspirants for admission to colleges or sending the students of well-to-do families to foreign countries for higher studies, is no proper solution. So, both I and III do not follow. The right solution is to increase the number of colleges so as t accommodate the increasing number of admission-seekers. So, only II follows.
Q:DIRECTIONS: These questions are based on the following information.
The State Road Transport Corporation will show a seven-minute film on safety in 3 languages for the benefit of passengers on board on all its luxury buses. Much like those placed in aircraft, laminated safety guides will be available for passengers, showing the layout of the bus and some basic steps they could follow to get out of the bus in case of an emergency.
(A) The passengers may follow instructions provided in case of an emergency.
(B) There were a number of accidents where passengers could not get out of a bus while it was on fire.
(C) The Road Transport Corporation intends to ensure the safety of passengers in case of an emergency.
(D) Aircraft have similar instructions in case of an emergency.
(E) The existing passenger safety measures are not adequate.
(F) There was a demand for increased safety measures for passengers of luxury buses.
Which of the following assumption(s) is/are implicit in the above passage?
1730 05df87bd7571a434f15e69097
5df87bd7571a434f15e69097The State Road Transport Corporation will show a seven-minute film on safety in 3 languages for the benefit of passengers on board on all its luxury buses. Much like those placed in aircraft, laminated safety guides will be available for passengers, showing the layout of the bus and some basic steps they could follow to get out of the bus in case of an emergency.
(A) The passengers may follow instructions provided in case of an emergency.
(B) There were a number of accidents where passengers could not get out of a bus while it was on fire.
(C) The Road Transport Corporation intends to ensure the safety of passengers in case of an emergency.
(D) Aircraft have similar instructions in case of an emergency.
(E) The existing passenger safety measures are not adequate.
(F) There was a demand for increased safety measures for passengers of luxury buses.
- 1Only Afalse
- 2A and Ffalse
- 3A and Etrue
- 4E and Ffalse
- 5None of thesefalse
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Answer : 3. "A and E"
Q: A trader had 2000 kgs of rice. He sold a part of it at 10 % profit and the rest at 16 % profit so that he made a total profit of 14.2%. How much rice (in kg) did he sell at 10 % profit?
1730 05dca4eecf7c0852c4475b0b9
5dca4eecf7c0852c4475b0b9- 11400false
- 2600true
- 3800false
- 41000false
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Answer : 2. "600"
Q: Which state has launched the electricity bill settlement scheme 2020 in one lump sum?
1730 05fcf587822512332777a7d76
5fcf587822512332777a7d76- 1Goatrue
- 2Uttar Pradeshfalse
- 3Maharashtrafalse
- 4Madhya Pradeshfalse
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