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    • Posted by Bot Legend 1 year, 11 months ago (13248853)

    CBSE > Class 09 > हिंदी ए
    • 0 answers
    ANSWER

    • Posted by Kunsh Goyal 1 year, 11 months ago (14869339)

    CBSE > Class 09 > English Lang & Lit. (184)
    • 0 answers
    ANSWER

    • Posted by 🅹🅰🅽🅷🅰🆅🅸 🅺🅰🆄🆂🅷🅸🅺🅹 1 year, 11 months ago (10943859)

    CBSE > Class 11 > Chemistry
    • 1 answers

    Janhavi Singh 1 year, 11 months ago (14430713)

    The different types of atomic models are:- 1)Rutherford atomic theory 2)The Bohr atomic model 3)Atomic models 4)Modern atomic model 5)Atom 6)Electron cloud model 7)Plum pudding model

    1 Thank You

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    • Posted by Mohammad Zaid Shaikh 1 year, 11 months ago (14869130)

    Rajasthan Board > Class 10 > English
    • 3 answers

    Manvi Jain 1 year, 10 months ago (14926383)

    Lencho was a farmer and his main problem is hail that destroys his crop

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    Varsha Damor Varsha Damor 1 year, 11 months ago (14793328)

    Lencho was a farmer and her man problem was her crop was destroying

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    Motilal Dewasi 1 year, 11 months ago (14888024)

    Lencho was farm is based

    1 Thank You

    ANSWER

    • Posted by Bharat Kandari 1 year, 11 months ago (14869120)

    CBSE > Class 10 > English Communicative (101)
    • 1 answers

    Bharat Kandari 1 year, 11 months ago (14869120)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    Class - IX Subject -English Autumn Break Holiday Homework 1) Write Diary entries for the following topics i)You recently visited the 24th Crafts Mela at Suraj Kund, Faridabad. It was Mini India assembled at one place. Using the hints, make a diary entry of what you saw and experienced there. ii)You paid a visit to an ‘Old Home’ with other N.S.S. Volunteers. Using the hints given below together with your own ideas, make a diary entry of what you saw and experienced there. Hints: • Old home • Mostly senior citizens above 60 • Peaceful surroundings • Spacious • Clean rooms and baths • Regular Medical check-ups • a good library • Means of recreation • A home away from home. iii)While going home you came across many children on the roads at crossroads with begging bowls in their hands. Your are shocked and disgusted at this unflattering picture of a country which boasts of being a major economy in the world. Record your experience in your diary. 2) Write short Stories on the following topics i)Aradhna started writing a story of ‘Two Boys in a Jungle’. Due to the pressure of heavy engagements, you gave up, after writing a line or so. Taking help from the input given below and basing on the introduction Aradhna made, develop a complete story. ii)Sneha wanted to write a story but could not go beyond a line or two. Taking help from ,the information given below along with the lines Sneha wrote a complete story. Mr. Aggarwal was a very wealthy businessman. One day he was alone sitting at his dining table when… Outline: Thief entered…….. Mr. Aggarwal thanked……… to give company……. birthday ……. gave him good food and drinks…….. gave a purse full of silver coins………… years passed by……. fortunes changed…….. business was ruined……… Mr. Aggarwal became poor……. 50th birthday……….. alone……. no food………. no drinks…….. bell rang …….. a man emerged…….. recognised…….. the old thief…….. came with fruits, sweets and drinks and a bag full of money. iii)Renuka started writing a short story. However, due to an unavoidable reason, she had to give it up after writing a few lines. Taking help from the input given below and using the beginning Renuka made, write a complete story. Raghu and Raj were two friends and neighbours. Raghu had a servant named Ramu. The name of Raj’s servant was Shammu … Outline: Both servants foolish……. two friends debated…….. who is more foolish?……. Ramu or Shammu?…… decided to give a test………. Raghu told Ramu “Run back to my house to find out if I am there or not”…. Ramu rushed home……. Raj told Shammu……. Go to your room and find out if you are there or not.” Ramu and Shammu returned …….. Ramu complained…….. wasted time……… master could have phoned to find himself….. Shammu reported…….. he was not in the room……. nothing to choose between them. 3) Write Figure of speech with two examples each 4) Write definitions with examples on the following topics Determiners Modals Subject -Verb concord Tenses Direct and indirect speech 5) Learn all the syllabus which we have completed

    • Posted by Chhavi Sharma 1 year, 11 months ago (9899660)

    CBSE > Class 09 > English Lang & Lit. (184)
    • 0 answers
    ANSWER
    http://mycbseguide.com/examin8/

    • Posted by Shilpa Sharma 1 year, 11 months ago (2858855)

    CBSE > Class 11 > Accountancy
    • 0 answers
    ANSWER

    • Posted by Sharma Aishwarya 1 year, 11 months ago (14773201)

    CBSE > Class 11 > Economics
    • 0 answers
    ANSWER

    • Posted by Naveen Samota 1 year, 11 months ago (14868817)

    Rajasthan Board > Class 11 > Biology
    • 1 answers

    Naveen Samota 1 year, 11 months ago (14868817)

    Chapter 4 notes

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    ANSWER
    General Instructions: Read the following instructions carefully. There are 33 questions in this question paper with internal choice. SECTION A consists of 16 multiple-choice questions carrying 1 mark each. SECTION B consists of 5 short answer questions carrying 2 marks each. SECTION C consists of 7 short answer questions carrying 3 marks each. SECTION D consists of 2 case - based questions carrying 4 marks each. SECTION E consists of 3 long answer questions carrying 5 marks each. All questions are compulsory. Use of log tables and calculators is not allowed. SECTION A The following questions are multiple-choice questions with one correct answer. Each question carries 1 mark. There is no internal choice in this section. 1.Which of the following solutions will have the highest conductivity at 298 K? 0.01 M HCl solution 0.1 M HCl solution 0.01 M CH3COOH solution 0.1 M CH3COOH solution 2.The vitamins which can be stored in our body are: Vitamin A, B, D and E Vitamin A, C, D and K Vitamin A, B, C and D Vitamin A, D, E and K 3.What is IUPAC name of the ketone A, which undergoes iodo form reaction to give CH3CH=C(CH3)COONa and yellow precipitate of CHI3? 3-Methylpent-3-en-2-one 3-Methylbut-2-en-one 2, 3-Dimethylethanone 3-Methylpent-4-one 4.Which of the following is not correct? In haloarenes, the electron pairs on halogen atom are in conjugation with -electrons of the ring The carbon-magnesium bond is covalent and non-polar in nature. During SN1 reaction, the carbocation formed in the slow step being sp2 hybridised is planar Out of CH2= CH-Cl and C6H5CH2Cl, C6H5CH2Cl is more reactive towards SN1 reaction 5.Which of the following is not correct? In haloarenes, the electron pairs on halogen atom are in conjugation with -electrons of the ring The carbon-magnesium bond is covalent and non-polar in nature. During SN1 reaction, the carbocation formed in the slow step being sp2 hybridised is planar Out of CH2= CH-Cl and C6H5CH2Cl, C6H5CH2Cl is more reactive towards SN1 reaction 6.Match the properties with the elements of 3d series: Lowest enthalpy of atomisation Sc shows maximum number of oxidation states Mn transition metal that does not form coloured compounds Zn Ti (i) (r), (ii) (q), (iii) (p) (i) (r), (ii) (s), (iii) (p) (i) (p), (ii) (q), (iii) (r) (i) (s), (ii) (r), (iii) (p) 7.In which of the following solvents, the C4H8NH3+X– is soluble; ether acetone water bromine water 8.Which of the following observation is shown by 2-phenyl ethanol with Lucas Reagent? Turbidity will be observed within five minutes No turbidity will be observed Turbidity will be observed immediately Turbidity will be observed at room temperature but will disappear after five minutes. 9.Anisole undergoes bromination with bromine in ethanoic acid even in the absence of iron (III) bromide catalyst Due to the activation of benzene ring by the methoxy group. Due to the de-activation of benzene ring by the methoxy group. Due to the increase in electron density at ortho and para positions Due to the formation of stable carbocation. 10.Which of the following is not considered a transition element? Scandium Silver Vanadium Zinc 11.Zirconium (Zr, Atomic number 40) and Hafnium (Hf, Atomic number 72) are transition series metals of group 4. They are found together in nature and are difficult to separate from each other. Which of the following is the reason for the above? The almost identical radii of the atoms. The elements belong to the same group. The elements belong to adjacent periods. The presence of the same number of unpaired electrons in both the elements. 12.Which of the following would be among the products of the reactions between ammonia reacts with bromoethane? CH3CH2NH2 (CH3CH2)2NH (CH3CH2)3N (CH3CH2)4N+Br− only i only i and ii only i, ii, and iii all- i, ii, iii and iv 13.Which one of the following is a synthetic halogen compound? a) Chloramphenicol b) Diphenyl hydramine c) Chloroquine d) Omeprazole 14.Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium? a) [Xe] 4f 65d26s2 b) [Xe] 4f75d1 6s2 c) [Xe] 4f86d2 d) [Xe] 4f95s1 15.Alcoholic compounds react: a) only as nucleophiles. b) both as nucleophiles and electrophiles. c) only as electrophiles. d) None of these 16.p – toluenesulphonyl chloride is used to: a) as a replacement of benzenesulphonyl chloride b) All of these c) for the distinction of primary, secondary and tertiary amines d) for the separation of a mixture of amines SECTION B 17.5% solution of Na2SO4.10H2O (MW = 3 22) is isotonic with 2% solution of non- electrolytic, non volatile substance X. Find out the molecular weight of X. 18.Arrange the isomeric dichlorobenzene in the increasing order of their boiling point and melting points. Explain why the electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions as compared to those in benzene. 19.Convert the following: Benzene to m-nitrobenzaldehyde Bromobenzene to benzoic acid 20.Explain the following observations: The transition elements have great tendency for complex formation. There is a gradual decrease in the atomic sizes of transition elements in a series with increasing atomic numbers. 21 define .carbonyl group. SECTION c 22.Nitration is an example of aromatic electrophilic substitution and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol, which one is more easily nitrated and why? Or How do you convert the following? Benzoic acid to benzaldehyde. Ethyne to ethanal. Acetic acid to methane 23.A mixture of 0.5 moles acetaldehyde and 0.5 moles diethyl ketone is treated with 1 mole of sodium cyanide (NaCN). What will be the major product in this reaction? Give two reasons for your answer Or Show steps to convert nitrobenzene to phenol. The table below shows the observation when sodium reacts with ethanol and phenol. Ethanol Solution of phenol in ethanol Sodium sinks, evolves hydrogen steadily Sodium sinks, evolves hydrogen rapidly The reaction in each case involves reduction of hydrogen ion by sodium. Write down an ionic reaction for both the cases. Which is stronger acid- phenol or ethanol? Why? 24.Explain the steps of preparation of potassium dichromate? Or Transition metals generally form coloured ions. Why? Which of the following will be colored? 25.What is the lanthanoid contraction? What are its causes and consequences? 26. A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution. 27.. A compound ‘A’ with molecular formula C4H10O on oxidation forms compound ‘B’ gives positive iodoform test and on reaction with CH3MgBr followed by hydrolysis gives (c). Identify A, B & C. Or Give the equations of reactions for the preparation of phenol from cumene. 28.Chloroform is stored in dark coloured bottles. Section D 29.Read the text carefully and answer the questions: The d-block of the periodic table contains the elements of the groups 3 to 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1)d1-10 ns1-2. The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e. 3d, 4d and 5d series. However, Zn, Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation stables, complex formation, formation of coloured ions, alloys, catalytic activity etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Why are Zn, Cd and Hg non-transition elements? OR Why are melting points of transition metals high? Which transition metal of 3d series does not show variable oxidation state? Why do transition metals and their compounds show catalytic activity 30.An organic compound ‘A’ having molecular formula C5H10O gives negative Tollens’ test, forms n-pentane on Clemmensen reduction but doesn’t give iodoform test. Identify ‘A’ and give all the reactions involved. Carry out the following conversions: Propanoic acid to 2-Bromopropanoic acid Benzoyl chloride to benzaldehyde How will you distinguish between benzaldehyde and acetaldehyde Section E 31.Write the outer shell electronic configuration of an element with atomic number 24. Why is this different from the elements that are adjacent to it in the periodic table? Why is Hg not considered as a transition element? The third ionisation enthalpy of a few transition elements are given below: Element Sc Ti V Cr Mn Fe Co Ionisation enthalpy (kJ mol-1) 2393 2657 2833 2990 3260 2962 3243Explain the reason for the break in the trend of steady increase in third ionisation enthalpy as shown in the table. Based on this, what can be said about the second ionisation energy of Cr as compared to that of Mn? Or Write the structures of the following organic halogen compounds. (i) 2-Chloro-3-methylpentane (ii) p-Bromochlorobenzene (iii) 1-Chloro-4-ethylcyclohexane (iv) 2-(2-Chlorophenyl)-1-iodooctane (v) Perfluorobenzene (vi) 4-tert-Butyl-3-iodoheptane (vii) 1-Bromo-4-sec-butyl-2-methylbenzene (viii) 1,4-Dibromobut-2-ene 32.The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K. Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. Also find the composition of the vapour phase. Or write the structures of the following compounds. (i) α-Methoxypropionaldehyde (ii) 3-Hydroxybutanal (iii) 2-Hydroxycyclopentanecarbaldehyde (iv) 4-Oxopentanal (v) Di-sec-butyl ketone (vi) 4-Fluoroacetophenone 33.Write structures of the compounds whose IUPAC names are as follows: (i) 2-Methylbutan-2-ol (ii) 1-Phenylpropan-2-ol (iii) 3,5-Dimethylhexane -1, 3, 5-triol (iv) 2,3 - Diethylphenol (v) 1 - Ethoxypropane (vi) 2-Ethoxy-3-methylpentane (vii) Cyclohexylmethanol (viii) 3-Cyclohexylpentan-3-ol (ix) Cyclopent-3-en-1-ol (x) 3-Chloromethylpentan-1-ol.

    • Posted by Sagar Pandey 1 year, 11 months ago (14868782)

    CBSE > Class 12 > Chemistry
    • 2 answers

    Ashutosh Singh 1 year, 11 months ago (14821642)

    Waah beta ! Poora question paper hi chhap diya

    0 Thank You

    Ankit Singh 1 year, 11 months ago (14848781)

    Kya hai ye pura paper hi likh diye ho

    2 Thank You

    ANSWER

    • Posted by Vijay Raj 1 year, 11 months ago (14862584)

    Rajasthan Board > Class 12 > राजनीति विज्ञान
    • 1 answers

    Jatin Saini 1 year, 11 months ago (14870907)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    2 Thank You

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    • Posted by Shraddha Brahma 1 year, 11 months ago (14867049)

    CBSE > Class 07 > Social Science
    • 0 answers
    ANSWER

    • Posted by Subhashinee Negi 1 year, 11 months ago (14868449)

    CBSE > Class 12 > English Core
    • 1 answers

    Kashish Gurawalia 1 year, 11 months ago (14869064)

    Autor

    4 Thank You

    ANSWER

    • Posted by Logesh Waran 1 year, 11 months ago (14868572)

    CBSE > Class 05 > Mathematics
    • 2 answers

    Gurseerat Kaur Kaur 1 year, 9 months ago (13595494)

    Water, tea powder, sugar, milk and 1m 2m ago then tea is ready

    0 Thank You

    Sadaf Ashraf 1 year, 9 months ago (14994604)

    Chai patti, chini, doodh

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    • Posted by Vrinda Gupta 1 year, 11 months ago (14868417)

    CBSE > Class 10 > English Language and Literature
    • 1 answers

    Lakshmi Kumari Singh 1 year, 11 months ago (14385255)

    Richard Ebright

    0 Thank You

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    • Posted by Aarti Duge 1 year, 11 months ago (14695183)

    CBSE > Class 11 > Biology
    • 3 answers

    Aniket Gulia 1 year, 7 months ago (10489508)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0 Thank You

    Krishna Kamal Meher 1 year, 9 months ago (9178920)

    Blood

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    Aarti Duge 1 year, 11 months ago (14695183)

    Plz answer

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    • Posted by Sahil Yadav 1 year, 11 months ago (14867432)

    CBSE > Class 10 > Other Subjects
    • 0 answers
    ANSWER

    • Posted by Rose S 1 year, 11 months ago (14868109)

    CBSE > Class 08 > Mathematics
    • 4 answers

    Gaurav Verma 1 year, 11 months ago (8665507)

    2401

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    Sonam Kumari 1 year, 11 months ago (11152297)

    2401

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    Chandan Chintu 1 year, 11 months ago (4545858)

    2401

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    Vishal Dural 1 year, 11 months ago (14866415)

    Lesson 3

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    • Posted by Sneh Choudhary 1 year, 11 months ago (14528514)

    CBSE > Class 10 > Science
    • 0 answers
    ANSWER

    • Posted by Rishabh Pandey 1 year, 11 months ago (14631776)

    CBSE > Class 10 > Science
    • 4 answers

    Anita Thakur 1 year, 11 months ago (14872751)

    To increase surface area for absorption of food

    1 Thank You

    Aashi Tiwari 1 year, 11 months ago (14748603)

    To increase the surface area by which absorption of food easily takes place

    1 Thank You

    Lakshmi Kumari Singh 1 year, 11 months ago (14385255)

    Function of villi is It helps in absorption of digested food

    2 Thank You

    Arshpreet Kaur 1 year, 11 months ago (14560482)

    It increase the surface area of small intestine so as to absorb more digested food at a time

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    • Posted by Mansi Gupta 1 year, 11 months ago (14848250)

    CBSE > Class 11 > Biology
    • 0 answers
    ANSWER

    • Posted by Satwik Tisaver 1 year, 11 months ago (14580663)

    CBSE > Class 10 > Information Technology (402)
    • 3 answers

    Keshav Rajput 1 year, 11 months ago (14885996)

    143

    0 Thank You

    Satwik Tisaver 1 year, 11 months ago (14580663)

    You know the answer of my question?

    0 Thank You

    Rishabh Pandey 1 year, 11 months ago (14631776)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

    1 Thank You

    ANSWER

    • Posted by Account Deleted 9 months, 2 weeks ago (12165790)

    CBSE > Class 12 > Accountancy
    • 1 answers

    Aanchal Gulia 9 months, 3 weeks ago (10351054)

    45678

    29 Thank You

    ANSWER

    • Posted by Chinmay Pai 1 year, 11 months ago (14597508)

    CBSE > Class 10 > Regional Language
    • 2 answers

    Sathwika Garimella 1 year, 9 months ago (15010938)

    Telugu

    2 Thank You

    Hemanth T Poranjaya 1 year, 10 months ago (14915016)

    Notes

    5 Thank You

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    • Posted by Govind Lahare 1 year, 11 months ago (14694835)

    CBSE > Class 12 > Chemistry
    • 1 answers

    Amrit Kumar 1 year, 11 months ago (4558309)

    2>1>3

    1 Thank You

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    • Posted by Shiza Wasim 1 year, 11 months ago (14868130)

    ICSE & ISC > Class 09 > Hindi
    • 0 answers
    ANSWER

    • Posted by Aditya Kumar 1 year, 11 months ago (14371293)

    CBSE > Class 10 > Social Science
    • 1 answers

    Hsjwcbwj Hhvvh 1 year, 11 months ago (14631560)

    There is a great demand of loans and credit because people need money at time for some personal reasons but they don't have so they take loan and credit to full fill there needs.

    0 Thank You

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    • Posted by Koushik Kalyanasundram 1 year, 11 months ago (14490907)

    CBSE > Class 10 > Social Science
    • 1 answers

    Lakshmi Kumari Singh 1 year, 11 months ago (14385255)

    Cash is a physical currency ,that is used as medium of exchange for goods and services. Primary sector - It involved extraction of raw material from earth like farming and mining. Secondary sector - In this sector raw material is converted into useful form .it is also know as manufacturing.

    0 Thank You

    ANSWER

    • Posted by Deepak Bhandari 1 year, 11 months ago (14087939)

    CBSE > Class 10 > Mathematics
    • 1 answers

    Gaurav Kumar 1 year, 11 months ago (14524087)

    Canvas use in rectangular tent, R=45cm H=400cm

    0 Thank You

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    • Posted by Krishna Baghwar 1 year, 11 months ago (14539353)

    CBSE > Class 09 > Information Technology (402)
    • 3 answers

    Anshul . 1 year, 11 months ago (14762534)

    RAM, which stands for random access memory, and ROM, which stands for read-only memory, are both present in your computer. RAM is volatile memory that temporarily stores the files you are working on. ROM is non-volatile memory that permanently stores instructions for your computer.

    0 Thank You

    Ansh Yadav 1 year, 11 months ago (12532589)

    Rom means read only memory aur ram means random of access

    0 Thank You

    Ashu Kumar 1 year, 11 months ago (14721091)

    The means of Rom is read only memory and the Ram is random access memory

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