This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Rewrite the following sentences by using the correct homophones for the underlined words:1. He goes to college in the motorbike2. You better make a timetable and study your daily lessons.3. Please maintain a proper queue to receive your forms.4. Please use the indicators appropriately in this lane as it is accident-prone.5. It is always better to share the slightest details with your barrister. |
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Answer» 1. motorcycle 2. schedule 3. line 4. blinkers 5. attorney |
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| 2. |
Re-arrange the jumbled words to form meaningful sentences1. In/’ as/it/you/ you /lie /must /bed/ make /your.2. you /hunt/ can’t/with /run /the/ with/hounds/ the/ hare /and.3. but / You / you / may / cannot / lead/make/ a /him/ horse /to /drink/ water.4. yours/ and / You/ I’ll / scratch /my /scratch back5. grass/on/ the/ other/is/ the/ side/the/fence of greener. |
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Answer» 1. As you make your bed, you must lie in it. 2. You can’t run with the hare and hunt with the hounds. 3. You may lead a horse to water, but you cannot make him drink. 4. You scratch my back and I’ll scratch yours. 5. The grass is greener on / the other side of the fence. |
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| 3. |
Re-arrange the jumbled words to form meaningful sentences1. thought’is/the/theAvish/’father/to.2. wise / the/’ to/ a/ enough/’ is /word /3. is/word/recalling/a/spoken/ past4. is/word/recalling/a/spoken/ past5. have/it/ can’t and/eat/you/your/cake |
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Answer» 1. The wish is father to the thought. 2. A word is enough to the wise. 3. A word spoken is past recalling. 4. You can’t have your cake and eat it. 5. You can’t make an omelet without breaking eggs. |
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| 4. |
Re-arrange the jumbled words to form meaningful sentences1. intentions /road/ the / to /is / hell /with/ paved/’ good.2. is/ is /the / flesh/ spirit/ w’eak/willing/but /the3. man/no/for/and/time/tide/wait4. broth/the/spoil/cooks/too/many/5. door/another/ shuts/where /opens/one. |
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Answer» 1. The road to hell is paved with good intentions. 2. The spirit is willing, but the flesh is weak. 3. Time and tide wait for no man. 4. Too many cooks spoil the broth. 5. Where one door shuts, another opens. |
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| 5. |
Which of the following is not part of Pranayam? A. Anulom vilom B. Kapalbhati C. Bhastrika D. Ujjayi |
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Answer» B. Kapalbhati Kapalbhati is not part of Pranayam. |
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| 6. |
Re-arrange the jumbled words to form meaningful sentences1. a / in / look /the/ gift /never / horse/ mouth.2. Another/ One / turn/ good / deserves.3. Swallow / make / One / summer/ doesn’t/ a4. a/ all /makes / dull/ play/and/ work / no/ Jack / boy.5. Eating / pudding/ of/ the / the/ the/ in / is/ proof. |
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Answer» 1. Never look a gift horse in the mouth. 2. One good turn deserves another. 3. One swallow doesn’t make a summer. 4. All work and no play makes Jack a dull boy. 5. The proof of the pudding is in the eating. |
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| 7. |
Which of the following arguments in a financial function represents the total number of payments?(A) FV (B) PV (C) Nper (D) Rate |
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Answer» Correct answer is: (C) Nper |
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| 8. |
Which function results can be displayed in Auto Calculate? (A). SUM and AVERAGE(B). MAX and LOOK(C). LABEL and AVERAGE(D). MIN and BLANK |
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Answer» Correct answer is: (A). SUM and AVERAGE |
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| 9. |
____ was to have dinner after the movie. A) What B) What I want C) What we are to do D) What I wanted to do |
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Answer» Correct option is D) What I wanted to do |
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| 10. |
I recommended that the patient _______ on as soon as possible. A) is operated B) operated C) would be operated D) be operated |
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Answer» Correct option is D) be operated |
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| 11. |
The referee and the two teams ran out onto the ______. A) circus B) course C) observatory D) pitch |
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Answer» Correct option is D) pitch |
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| 12. |
_______ was to have dinner after the meeting. A) What we are to do B) Which we needed C) What I wanted to do D) Why he comes |
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Answer» Correct option is C) What I wanted to do |
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| 13. |
As the Games Secretary of the Students’ Council, you are to select a school cricket team to take part in the district level tournament. Draft a notice in not more than 50 words for the school noticeboard inviting students for selection as players and informing them about the match. |
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Answer» GOVT SENIOR SECONDARY SCHOOL SHRIMADHOPUR (SIKAR)NOTICE September 4, 20– District Level Cricket Tournament Our school is sending its cricket team to take part in the district level tournament being held in Sikar from September 21 to September 26. The players desirous to be in the school team may send their names to the undersigned by September 7. We will have school level matches to select the team on September 15 and 16. Only the selected ones will represent our school. |
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| 14. |
What is STT? Find STT of the following? Mr. A. sells a futures contract of M/s. XYZ Ltd. (Lot Size: 1000) expiring on 29-Sep-2005 for Rs. 300. The spot price of the share is Rs. 290. |
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Answer» Securities Transaction Tax (STT) is levied on all transactions of sale and/or purchase of equity shares and units of equity oriented fund and sale of derivatives entered into in a recognized stock exchange. The securities transaction tax thereon would be calculated as follows: 1. Total futures contract value = 1000 x 300 = Rs. 3,00,000 2. Securities transaction tax payable thereon 0.017% = 3,00,000 x 0.017% = Rs. 51 |
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| 15. |
Change the following sentences into Reported Speech :1. Ram said to me, “Let’s sing together.”2. Sita said to me, “Let me finish my work.”3. Sarala said to her elder brother, “Let me do my homework.”4. He said to me, “Let’s start tomorrow.”5. The Principal said to the students, “Let no one come late.”. |
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Answer» 1. Ram suggested to me that we should sing together. 2. Sita requested me to let her finish her work. 3. Sarala requested her elder brother to let her do her homework. 4. He suggested to me that we should start the next day. 5. The Principal ordered the students that no one should come late. |
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| 16. |
Everybody said, “We’re glad the danger is over.” Everybody said that _______. A) he was glad the danger was over B) they are glad the danger is over C) they were glad the danger was over D) he is glad the danger is over |
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Answer» Correct option is C) they were glad the danger was over |
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| 17. |
Change the following sentences into Reported Speech :1. The master said to his servant, “Bring me a cup of milk.”2. The beggar said to my mother, “Please give me some food.”3. The doctor said to the patient, “Do not take butter while you are under my treatment.”4. The landlord said to the farmer, “Go away from here and don’t show me your face again.5. The teacher said to the boys, “Look at the blackboard and listen to what I say.” |
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Answer» 1. The master ordered his servant to bring him a cup of milk. 2. The beggar requested my mother to give him some food. 3. The doctor advised the patient not to take butter while he (the patient) was under his treatment. 4. The landlord commanded the farmer to go away from there and forbade him to show him his face again. 5. The teacher advised the boys to look at the blackboard and listen to what he said. |
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| 18. |
Read the passage given below and answer the questions:This problem of the art of living is one which for two thousand years has interested and perplexed the world’s philosophers ………….. Most people would agree that, apart from the eternal verities, the art of living consists in the achievement of happiness and in the avoidance of unhappiness. Happiness has little to do with enjoyment or even pleasure; it is something for more reputable than self-indulgence. Happiness can only be found in the free and successful expression of one’s own personality. I shall now examine that phrase and therefore repeat it.Happiness, or the art of living, consists in the free and successful expression of one’s own personality, what do I mean by that? I mean something for more than the selfishness of self-seeking. People who are selfish or self-centered or conceited have not begun to learn the art of living; they have not mastered even the ABC of the art. Of all the miserable people in the world, there are none so miserable as those who think only of themselves and whose every motive is the self-seeking motive.You see, every man or woman born into this world is given certain personal virtues and cursed with certain personal defects. If he or she seeks to express his or her own personality, which I hold to be the art of living, he must strive always to express his virtues and to suppress his defects. He must not express the worst in himself; he must express the best in himself. He will never be happy if he falls into the dreary round of selfishness.(i) On the basis of your reading of the above passage make notes on it using headings and subheadings.(ii) Write a summary of the passage and suggest a suitable title. |
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Answer» (i) Notes: 2. Happiness 3. Happiness can only be found 4. Every man or woman 5. This art of living is (ii) Summary |
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| 19. |
Write a speech on ‘Non-Violence: A Potent weapon for World Peace’. |
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Answer» Non-Violence: A Potent weapon for World Peace Respected Principal sir, teachers and friends! I am going to speak on ‘non-violence as a potent weapon for world peace’. The path of non-violence shown by a number of sages is a way to the theory of ‘live and let live’. Mahatma Gandhi defeated the British Empire and won the freedom for India using the weapon of non-violence. He showed the world that non-violence is not only a way of life but also a weapon for peaceful struggle. As far as I think, non-violence has great potential as a weapon for world peace. A world, based on the principle of non-violence, will be the most beautiful world. |
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| 20. |
Write a speech on ‘Benefits of Meditation and the Art of Concentration’. |
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Answer» Benefits of Meditation and the Art of Concentration Respected teachers and dear friends |
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| 21. |
Write a speech on the ‘Role of the Revolutionary Leaders of the Indian Freedom Struggle’. |
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Answer» Role of the Revolutionary Leaders of the Indian Freedom Struggle Respected Principal, teachers and my friends! I’m going to speak on the role of the revolutionary leaders of the Indian freedom struggle. During the days of our freedom struggle, two parallel powers were working against the British rule. On one side there were non-violent demonstrations under the leadership of Mahatma Gandhi. The other side was led by revolutionary leaders like Subhash Chandra Bose, Bhagat Singh, Sukhdev, Rajguru, Chandrashekhar Azad etc. These revolutionary leaders were full of vigour and did everything to terrorise the British. In my view, the revolutionary leaders played a great role in getting our freedom from the British. |
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| 22. |
Solar observatory in Rajastha is located at-1. jaipur2. Udaipur3. Kota4. Ajmer |
Answer» Correct Answer - Option 2 : Udaipur
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| 23. |
You are a member of your school’s Social Service Club. You have to visit the nearby area where a large number of residents are addicted to smoking. Hence, prepare a speech on the topic ‘Smoking-a Silent Killer’ in not more than 100 words. |
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Answer» Smoking – A Silent Killer Ladies & Gentlemen: Today I have come to meet you for a very noble cause. Last week, I came to know that a large number of residents in this area are addicted to smoking. You all should be aware of the harmful effects of smoking. Tobacco causes many health-related problems like cancer, respiratory diseases and other diseases. It is a killer. Besides these, it is a drain on the limited family income. Moreover, smoking is harmful to other members of the family too. भाईयो और बहिनो: आज मैं आप लोगों से एक नेक कारण से मिलने आया हूँ। पिछले सप्ताह मुझे पता चला कि इस बस्ती में बहुत सारे लोग धूम्रपान के आदी हैं। आप सभी को धूम्रपान के हानिकारक प्रभावों से जागरूक होना चाहिये। तम्बाकू बहुत-सी स्वास्थ्य सम्बन्धी समस्याओं का कारण है, जैसे – कैंसर, श्वांस सम्बन्धी बीमारियाँ व अन्य बीमारियाँ । यह जानलेवा है। इसके अलावा यह परिवार की सीमित आय की बर्बादी है। धूम्रपान परिवार के अन्य सदस्यों के लिये भी हानिकारक है। |
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| 24. |
Read the following passage and answer the questions that follow:Success comes to those who work with concentration and have thoroughness in action. Anyone who achieves success in the management of any great affair of life is entitled to honour. May he be an artist who paints a picture, an author who writes a book, a housewife who manages the household affairs or a soldier who wins the battle – the credit goes to his ardent spirit which is responsible for getting the job done thoroughly without getting discouraged by the failures.Nothing great and durable was ever achieved without perseverance. It is only by practice, patience, labour, thoroughness and an eye for perfection that man reaches the minutest details of the problem, overcomes them and attains his goal. There is not even a single statesman who has not been a man of industry.Louis XIV rightly said, “It is by toil that kings govern”. Washington, an indefatigable man of business trained himself in the habits of application, study and methodical work and successfully brought them to bear in the affairs of the government. Wellington, the head of his army in Spain directed the precise manner in which the soldiers were to cook their breakfast while on duty. He specified the exact speed at which bullocks were to be driven.If every detail in action is carefully arranged and well executed, then efficiency is secured. : Booker T. Washington, a great American leader and educator, gained admission to the Hampton Normal and Agricultural Institute, Virginia. The head teacher got impressed by his quality of thoroughness in work. When asked to clean the adjoining room, he swept the room three times and dusted every bit of furniture four times. This superb quality of thoroughness in work impressed the head teacher and Washington got admission in the school of his dreams.So, it should be borne in mind that behind every dream and success lies a long trail of passionate efforts which the world may never come to know. But if anyone thinks that great success can be achieved without thoroughness, then it is better if thoroughness becomes our second nature and with the boon bestowed upon us, we can reap the harvest of our toil for the rest of our lives.(i) On the basis of your reading of the above passage make notes on it using headings and sub-headings.(ii) Write a summary of the passage and suggest a suitable title. |
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Answer» (i) Notes: 2. Nothing great and durable achieved without 3. Washington trained himself in the habits of 4. Wellington directed the soldiers to secure efficiency 5. Every dream and success lies in (ii)Summary Washington, Wellington gained success in their life by toiling hard and engaging themselves in passionate efforts. Brooker T. Washington impressed his head teacher by the quality of thoroughness in work whereas Wellington directed the soldiers to cook their breakfast while on duty. So, at last, it is wrong to think to achieve success without thoroughness in action and concentration in work. |
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| 25. |
Read the following passage and answer the questions that follow:Happy is the man who acquires the habit of reading when he is young. He has secured a life long source of pleasure, instruction and inspiration. So long as he has his beloved books, he need never feel lonely. He always has a pleasant occupation of leisure moments, so that he need never feel bored. He is the possessor of wealth more precious than gold. Ruskin calls books. “King’s Treasures” – treasuries filled, not with gold and silver and precious stones, but with riches much more valuable than these – knowledge, noble thoughts and high ideals.Poor indeed is the man who does not read, and empty is his life. The blessings which the reading habit confers on its possessor are many provided we choose the right kind of books. Reading gives the highest kind of pleasure. Some books we read simply for pleasure and amusement – for example, good novels. And novels and books of imagination must have their place in everybody’s reading.When we are tired, or the brain is weary with serious study, it is healthy recreation to lose ourselves in some absorbing story written by a master hand. Books are the most faithful of friends. Our friends may change or die, but our books are always patiently waiting to talk to us. They are never cross, peevish or unwilling to converse, as our friends sometimes are. No wonder a reader becomes a “book lover”.(i) On the basis of your reading of the above passage, make notes on it using headings and sub-headings.(ii) Write a summary of the passage and suggest a suitable title. |
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Answer» (i) Notes: 2. A reader always 3. The person who does not read is 4. Blessing through right kind of books are 5. Books – faithful friends 6. Ruskin Bond (ii) Summary |
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| 26. |
Write a speech in about 100 words on ‘Drunk Driving’. |
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Answer» Drunk Driving Respected Principal, my dear teachers and students, very good morning to all of you. Today I am going to deliver a short speech on ‘Drunk Driving’. Drunk driving is a serious problem that is playing with the life of thousands of people every year. A death from drunk driving does not only affect the victim but it affects everyone around him. |
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| 27. |
Write a speech on ‘The Most Inspiring book/story I have read’. |
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Answer» The Most Inspiring book/story I have read All good books inspire us either with the sublime thoughts they contain or the ideal characters they portray. The Ram Charit Manas composed by Tulsi Das is one such book which inspires all with both its sublime thoughts and ideal characters. It is the most inspiring book that I have read. It conveys the noble ideals of duty and sacrifice, It portrays the ideal characters of Ram, Bharat, Laxman, Sita and Hanuman. Its story is representative of human life and its struggles. The battle between Ram and Ravan represents – the victory of good over evil. Its story has influenced the Indian psyche so much that it is enacted every year. |
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| 28. |
Write a short speech in about 100 words on the ‘Importance of Traffic Lights’. |
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Answer» Importance Of Traffic Lights Respected Principal, teachers, guardians and my dear friends! Very good morning to all of you. Today I am going to deliver a short speech on the ‘Importance of Traffic Lights’. Traffic lights are not taken seriously by some drivers. We often see people jumping the red light and thus putting their lives and the lives of others at risk. Ignoring the red light is dangerous as it may cause a fatal accident. सम्माननीय प्रधानाचार्य, मेरे प्यारे गुरुजन, अभिभावकगण तथा प्रिय मित्रो! आप सभी को सुप्रभात। आज मैं ट्रैफिक लाइट के महत्व पर भाषण देना चाहता हूँ। कुछ ड्राइवर ट्रैफिक लाइट पर ध्यान नहीं देते। हम प्रायः लोगों को लाल लाइट को पार करते देखते हैं और इस प्रकार वे अपना तथा दूसरों का जीवन खतरे में डाल देते हैं। लाल लाइट की उपेक्षा बहुत ही खतरनाक है क्योंकि इस कारण दुखद दुर्घटना हो सकती है। |
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| 29. |
Write a speech on ‘My Favourite Poet’. |
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Answer» My Favourite Poet My favourite poet is William Wordsworth. He is one of the greatest poets of the Romantic Age in English Poetry. He lived from 1770 to 1850. He was born in the Lake District of northern England. He was a worshipper of Nature. He expressed in his poems a new philosophy of Nature.For him, Nature is the best teacher. His poems depict man’s relation to Nature. Some of his notable poems are The Prelude, The Excursion, The Solitary Reaper, Daffodils etc. Critics place him next to William Shakespeare and John Milton. He was a Poet Laureate of England from 1843 to 1850. |
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| 30. |
Write a speech on ‘Women’s Empowerment’. |
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Answer» Women’s Empowerment Women’s empowerment is a burning issue all over the world these days. This term refers to giving rights and freedom to women equal to men in every sphere of life. Women are half of the world population. Yet for centuries, they have been treated as inferior to men and deprived of their rights and freedom. But now with the advent of a new awakening in them and some enlightened men, they are reclaiming them. They are now found in every field of life working, competing with and even excelling men. Women’s empowerment means gender equality, social harmony, national development and reduced domestic violence. |
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| 31. |
Write a speech on ‘Importance of National Integration’. |
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Answer» Importance of National Integration India is a land of great diversity and ‘unity in diversity’ is its unique feature. People belonging to different castes and regions, speaking different languages and practising different religions, customs and traditions live here. They have different habits of food and dress. In such a scenario, there is a great need to maintain national integration. Though it is a Herculean task yet if the country is to make progress and become a developed, strong and prosperous country, the divisive forces, linguistic nationalism, religious fanaticism, class and caste differences will have to be defeated and crushed with an iron hand. |
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| 32. |
How do you feel if someone interrupts you?I hate people ___ me. A) interrupted B) to be interrupted C) not to interrupt D) having interrupted E) interrupting |
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Answer» Correct option is E) interrupting |
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| 33. |
You can tell me your secret. I _____ anyone. A) am not going tell B) won’t tell C) don’t tell D) didn’t tell |
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Answer» Correct option is B) won’t tell |
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| 34. |
The increasing order of atomic radii of the following group 13 elements isA. `Al lt Ga lt In lt TI`B. `Ga lt Al lt In lt TI`C. `Al lt In lt Ga lt TI`D. `Al lt Ga lt TI lt In` |
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Answer» Correct Answer - B `{:(Ga,lt,Al,lt,In,lt,TI,),(135,,145,,167,,170 "pm",):}` |
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| 35. |
Atom which has largest atomic radii in following -A. SeB. BrC. TeD. I |
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Answer» Correct Answer - C Order of Radii `Te gt I gt Se gt Br` |
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| 36. |
In a first order reaction initial concentration of a substance becoming the half is`100`sec,then calculation the time requird to reduce the concentration of reaction 0.0125 M from 0.05 M |
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Answer» Correct Answer - C For the first order reaction `K=(0.693)/(t_(t//2))=(0.693)/(100)=6.93xx10^(-3)sec^(-1)` `K=(2.303)/(t)"log"_(10)(a)/(a-x)` `t=(2.303)/(6.93xx10^(-3)) "log"_(10)(0.05)/(0.125)=200sec` |
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| 37. |
Select the neutral oxide in following -A. `CO_(2)`B. `CO`C. `P_(4)O_(10)`D. `NO_(2)` |
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Answer» Correct Answer - B `N_(2)O, NO, CO` and `H_(2)O` are neutral oxides |
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| 38. |
If the amount of energy requird in the process X to `X^(-)` is `-5 kJ//"mole"` then calculate how many energy is required in X to `X^(-)` processA. `-5 kJ//"mole"`B. `gt 5 kJ//"mole"`C. `lt 5 kJ//"mole"`D. `5 kJ//"mole"` |
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Answer» Correct Answer - B `X overset(-5 kJ//"mole")(rarr) X^(-)` `X^(-) underset(IP_(1))(rarr) X underset(IP_(2))(rarr) X^(+)` `IP_(1) = 5 kJ//"mole"` Then `IP_(2) gt IP_(1)` (Successive ionisation potential) |
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| 39. |
Choose the following atom which has maximum value of `Z_("eff")` ?A. NaB. LiC. SD. O |
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Answer» Correct Answer - C Order of `Z_("eff")` `Li lt Na lt O lt S` |
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| 40. |
Select the correct order of electron affinity :A. `F^(-) gt Cl^(-)`B. `F gt Cl`C. `Cl gt Cl^(-)`D. `F^(-) gt F` |
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Answer» Correct Answer - C `EA` of `F lt EA` of Cl due to interelectronic repulsion |
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| 41. |
The difference in atomic numbers of the inert gas and alkali metal in the 5th period of the moden long form of periodic table isA. 17B. 20C. 12D. 16 |
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Answer» Correct Answer - A In V period Atomic no. of Alkali metral `= 37 (Rb)` and Atomic no. of xenon `= 54` `:. "Diff"^(n) = 54 - 37 = 17` |
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| 42. |
If the ionic radii of each `K^(+)` and `F^(-)` are `1.34Å`, then tha atomic radii of `K` and `F` will be respectively:A. `1.34A, 1.34A`B. `0.72A, 1.96A`C. `1.96A, 0.72A`D. `1.96A, 1.34A` |
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Answer» Correct Answer - C Radius of `K gt` Radius of `K^(+)` Radius of `F^(-) gt` Radius of F |
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| 43. |
First cloned animal is(A) Dolly Sheep (B) Molly (C) Polly Sheep (D) Dog |
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Answer» Correct option is: (A) Dolly Sheep |
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| 44. |
Match the names of the Secretaries General of the UN given in Column 1 with the countries of their origin given in Column 2 and provide the correct answer from the options given below:Column 1 Column 2 1. Ban Ki-Moon a. Portugal 2. Kofi Annan b. Norway 3. Trygve Lie c. South Korea 4. Antonio Guterres d. Ghana1. 1 - c, 2 - d, 3 - b, 4 - a2. 1 - a, 2 - b, 3 - d, 4 - c3. 1 - d, 2 - a, 3 - c, 4 - b4. 1 - b, 2 - c, 3 - d, 4 - a |
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Answer» Correct Answer - Option 1 : 1 - c, 2 - d, 3 - b, 4 - a The correct answer is 1 - c, 2 - d, 3 - b, 4 - a.
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| 45. |
Statement-1:Aqueous solution of hydrogen peroxide is kept in glass or metel container containing some urea or phosphoric acid. Statement-2:Urea or phosphoric acid acts as a negative catalyst for the decomposition of hydrogen peroxide.A. Statement-1 and statement-2 are correct and statement-2 is the correct explanation for Statement-1B. Statement-1 is True, Statement-2 are correct but statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is correct, but statement-2 is False.D. Statement-1 is False, but Statement-2 is correct. |
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Answer» Correct Answer - D Kept in plastic or wax-lined glass containers containing urea or phosphoric acid, because traces of alkali metal ions from the glass and metal ion from the metal surface respectively can catalyse the explosive decomposition of `H_2O_2` |
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| 46. |
Select the correct statementsA. Passage of sulphur dioxide or of hydrogen sulphide (not in excess ) in to a solution of an iodate acidified with dilute hydrochloric acid, liberates iodineB. Phosphate rock, `Ca_3(PO_4)_2` on heating with sand coke in electric furnace at `1400-1500^@C` yields dimeric phosphorus pentaoxideC. Reaction of `H_2S` on aqueous solution of sodium sulphide yields sodium thiosulphateD. Sodium hypophosphite on warming with copper sulphate solution gives red precipitate of copper(I) |
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Answer» Correct Answer - A,C,D (A)`2IO_3^(-)+5H_2SO_3 to I_2 +5SO_4^(2-) + OH^(+)+H_2O , 2IO_3^(-) + 5H_2S + 2H^(+) to I_2 + 5S + 6H_2O` (B)`2Ca_3(PO_4)_2 +6SiO_2 + 10 C overset(1400-1500^@C)to 6CaSiO_3 + 10CO +P_4` (C )`2HS^(-)+4HSO_3^(-)to3S_2O_3^(2-)+3H_2O` (D)`3H_2PO_2^(-) + 4Cu^(2+)+ 6H_2O to 4CuH darr ("red")+3H_3PO_4 + 5H^+` |
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| 47. |
Sodium thiosulphate is prepared by :A. Boiling `Na_2SO_3` solution with elemental sulphur in alkaline mediumB. Boiling `Na_2SO_3` solution with elemental sulphur in acidic mediumC. Oxidation of poly sulphides , `Na_2S_3` with airD. Reduction of bisulphite solution plus `SO_2` with zinc dust |
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Answer» Correct Answer - A,C (A)`Na_2SO_3 + S underset(OH^- or H_2O)overset("boiling")toNa_2S_2O_3` (B)`S_2O_3^(2-)` formed in presence of acid precipitates sulphur and liberates `SO_2` gas according to the following reaction . `S_2O_3^(2-)+H^(=)tounderset("disproportionation")(Sdarr`(white) + `SO_2) uarr H_2O` (C )`2Na_2S_3 + 3O_2 underset("air")overset("heating")to2Na_2S_2O_3 + 2S` (D)`2HSO_3^(-)+SO_2overset(Zn)to S_2O_4^(2-)+SO_3^(2-)+H_2O` |
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| 48. |
Which of the following statements regarding hydrogen peroxide is`/`are incorrect ?A. The two hydroxy groups in hydrogen peroxide lie in the saem planeB. Aqueous solution of `H_2O_2` turns blue litmus redC. When `H_2O_2` behaves as a reducing agent, the O-O bond in its molecules in not broken downD. Aqueous solution of `H_2O_2` is stored in plastic bottles and some urea, phosphoric acid or glycerol is added to that solution |
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Answer» Correct Answer - A,B (A)Two hydroxl groups lie in different plane (have open book like structure) (B)It turns blue litmus red because of acidic character which is then bleached by bleaching action of `H_2O_2` |
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| 49. |
Which of the following statements is/are incorrect ?A. Ammonia is oxidised to `NO_2` by oxygen at `800^@C` in presence of a catalyst platinumB. Nitric acid on standing slowly turns yellowC. Colloidal sulphur is formed when `H_2S` gas is passed through nitric acid solutionD. `N_2O_3` gas dissolves in water giving a pale blue solution |
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Answer» Correct Answer - A (A)`2NH_3+5O_2underset(800^@C)overset(Pt)to2NO+3H_2O` (B)Due to the formation of `NO_2` according to following reactions `3HNO_3 to HNO_2 + 2NO_2 + H_2O +O_2` (C )`H_2S+[O]toH_2O+S,[O]` from `HNO_3` (D)`N_2O_3+H_2Oto2HNO_2` |
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| 50. |
Select the incorrect orders from the following .A. `CIO^(-) lt BrO^(-) lt IO^(-)` - disproportionationB. `CIO_4^(-) lt BrO_4^(-) lt IO_4^(-)` - oxidising powerC. `HCIO lt HCIO_2 lt HCIO_3 lt HCIO_4` - acid strengthD. HOCl gt HOI gt HOBr -acid strength |
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Answer» Correct Answer - B,D (B)`CIO_4^(-) lt IO_4^(-) lt BrO_4^(-)` according to their reduction potential (D)HOCI gt HOBr gt HOI. As electronegativity of halogens increases the acidic character increases Given (B) and (D) are correct order . |
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