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    • Posted by Dhanyasri Sudhakar 5 years, 6 months ago

    CBSE > Class 07 > Mathematics
    • 3 answers

    Chag Kavyaa 5 years, 6 months ago

    Yes it's right 1/2 =2/4

    2Thank You

    Janhvi Mishra 5 years, 6 months ago

    Yes it is right

    1Thank You

    Yogita Ingle 5 years, 6 months ago

    1/2=2/4 Is it right

    yes 2/4 = 1/2

    1Thank You

    ANSWER

    • Posted by Krishna Gupta 5 years, 6 months ago

    CBSE > Class 07 > Sanskrit
    • 2 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, Pathati pathtah pathanti pathasi pathath pathat pathami pathawah pathamah. It is going like this= first line→ Second line→ Third line→

    0Thank You

    Shubhadarshi Tiwari 5 years, 6 months ago

    Pathati pathtah pathanti pathasi pathath pathat pathami pathawah pathamah

    0Thank You

    ANSWER

    • Posted by Munavvar Munavvar Hussain 5 years, 6 months ago

    CBSE > Class 07 > English
    • 3 answers

    Pravesh Saini 5 years, 5 months ago

    Usfgh

    0Thank You

    Baswaraj Patne 5 years, 6 months ago

    Y

    0Thank You

    Elvis Jovin 5 years, 6 months ago

    I don't know because I did not read this lesson

    1Thank You

    ANSWER
    CBSE Class–VII Science NCERT Solutions CHAPTER-05 ACIDS, BASES AND SALTS Question 1. State differences between acids and bases. Answer: AcidsBases(i) Acids are sour in taste.(i) Bases are bitter in taste.(ii) It turns litmus paper red.(ii) It turns litmus paper blue.(iii) It doesn't change the colour of turmeric indicator.(iii) It changes the colour of turmeric indicator to red.(iv) It doesn't feel soapy on touching.(iv) It feels soapy on touching. Question 2. Ammonium is found in many household products, such as window cleaners. it turns red litmus blue. What is its nature? Answer: Ammonia has basic nature. Question 3. Name the source from which litmus solution is obtained. What is the use of this solution? Answer: Lichens. It is used as indicator to determine whether the given solution is acidic or basic. Question 4. Is the distilled water acidic, basic or neutral? How would you verify it? Answer: Distilled water is neutral.It can be verified with the help of red and blue litmus paper. It shows no change with both kind of litmus paper. Question 5. Describe the process of neutralization with the help of an example. Answer: The process in which an acid reacts with a base to form salt and water is known as neutralisation reaction. The reaction is given below, The reaction can be written as: Hydrochloric acid(HCl) + Sodium hydroxide(NaOH) → Sodium Chloride(NaCl) + Water (H2O)  Question 6. Mark ‘T’ if the statement is true and ‘F’ if it is false: (i) Nitric acid turns red litmus blue. (T/F) (ii) Sodium hydroxide turns blue litmus red. (T/F) (iii) Sodium hydroxide and hydrochloric acid neutralise each other and forms salt and water. (T/F) (iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F) (v) Tooth decay is caused by the presence of a base. (T/F) Answer: (i) F  (ii) F   (iii) T   (iv) T  (v) F Question 7. Dorji has a few bottles of soft drink in his restaurant. But, unfortunately these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink; another wants basic and third one wants neutral drink. How will Dorji decide which drink it to be served to whom? Answer: He can decide by the use of indicator. If the sample of drink turns red litmus blue, it is basic. If it does not turn blue litmus red, it is acidic. If it does not affect litmus, it is neutral. Question 8. Explain why: (a) An antacid tablet is taken when you suffer from acidity. (b) Calamine solution is applied on the skin when ant bites. (c) Factory waste is neutralised before disposing it into the water bodies. Answer: (a) Antacids are nothing but bases. When there is excess of acid in stomach antacid tablet neutralize the acids and relieve us. (b) Ant injects an acid during bite which causes the burning sensation. Calamine solution is basic in nature. It neutralises the acid and relieves from the pain. (c) Factory wastes contain both acidic and basic substances. These are harmful for the organisms living in water. So, these are should be neutralized before disposing. Question 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator. Answer: Dip the turmeric indicator in each liquids. The liquid in which the colour of turmeric indicator changes to red is basic in nature i.e. sodium hydroxide. Since, we already identified sodium hydroxide. We will pour the sodium hydroxide in other two bottles. The liquid which get warm after pouring the sodium hydroxide(base) in it is of hydrochloric acid as heat gets evolved in the neutralisation process. The last one which shows no effect is liquid of sugar solution.  Question 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. Answer: The above solution could be a base or a neutral solution because blue litmus paper doesn't change its colour in the neutral as well as basic solution.  Question 11. Consider the following statements: (a) Both acids and bases change colour at all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with abase. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct? (i) All four (ii) a and b (iii) b and c (iv) only d. Answer: (iv) only d. IS EVERY ANSWER CORRECT

    • Posted by Swaraj Jena 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Aryan 7119 5 years, 6 months ago

    CBSE > Class 07 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Hindu ?? 5 years, 6 months ago

    CBSE > Class 07 > Social Science
    • 1 answers

    Gaurav Seth 5 years, 6 months ago

    Dry point sites: 
    A dry point site is one that is slightly raised from the surrounding area, meaning that it is less likely to flood. 

    Wet point sites: 
    This refers to any site that has access to water, usually through being beside a river. Towns would either grow up along the river or clustered near the point at which the river enters the sea.

    1Thank You

    ANSWER

    • Posted by Sumit Kumar Giri 5 years, 6 months ago

    CBSE > Class 07 > Computer
    • 2 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's your answer....A function is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing. You have already seen various functions like printf() and main(). These are called built-in functions provided by the language itself, but we can write our own functions as well and this tutorial will teach you how to write and use those functions in programming language. Good thing about functions is that they are famous with several names. Different programming languages name them differently, for example, functions, methods, sub-routines, procedures, etc.

    0Thank You

    Sumit Kumar Giri 5 years, 6 months ago

    Write about biometric devises

    0Thank You

    ANSWER

    • Posted by Samiksha Alka 5 years, 6 months ago

    CBSE > Class 07 > हिंदी
    • 5 answers

    Saurya Singh 5 years, 2 months ago

    कौरवों का पांडवो से ईर्ष्या का मुख्य कारण था कि पांडव हर एक चीज में उनसे श्रेष्ठ थे और भीम बचपन में उसे कभी कभी मज़ाक में मारते रहते थे तो ये उन्हें अच्छा नहीं लगता था।

    1Thank You

    Hindu ?? 5 years, 6 months ago

    Kyoki pandavon kauravon se Shastra aur Yuddh Kushlata nei kayi kadam age the

    2Thank You

    Viraj Kotawadekar 5 years, 6 months ago

    आई

    0Thank You

    Viraj Kotawadekar 5 years, 6 months ago

    राम का भाई

    1Thank You

    Dhruv Pingolia 5 years, 6 months ago

    Hut

    2Thank You

    ANSWER

    • Posted by Vaishnavi Patil 5 years, 6 months ago

    CBSE > Class 07 > Mathematics
    • 2 answers

    Aryan 7119 5 years, 6 months ago

    A data is a collection of information.

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    Data can be defined as a systematic record of a particular quantity. It is the different values of that quantity represented together in a set. It is a collection of facts and figures to be used for a specific purpose such as a survey or analysis. When arranged in an organized form, can be called information. The source of data ( primary data, secondary data) is also an important factor.

    0Thank You

    ANSWER

    • Posted by Anjushibu Himam 5 years, 6 months ago

    CBSE > Class 07 > English
    • 1 answers

    Deepa Sharma 5 years, 6 months ago

    My friend

    1Thank You

    ANSWER

    • Posted by Rk Kagadi 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's the correct answer...... " Winter monsoons bring small amount of rain in southern part of India. It is because the Himalaya prevent much of the wind and moisture of monsoon from reaching the coast. "

    1Thank You

    Chag Kavyaa 5 years, 6 months ago

    Winter monsoons bring small amount of rain in southern part of India because the Himalaya prevent much of the wind and moisture of monsoon from reaching the coast I hope it will absolutely help you !!

    1Thank You

    Aafiya Sadiq 5 years, 6 months ago

    Winter monsoons bring small amount of rain in southern part of India because the Himalaya prevent much of the wind and moisture of monsoon from reaching the coast. Hope it helps you!!!

    0Thank You

    ANSWER

    • Posted by Dimple Seervi 5 years, 6 months ago

    CBSE > Class 07 > Mathematics
    • 2 answers

    Janhvi Mishra 5 years, 6 months ago

    It is true

    0Thank You

    Gaurav Seth 5 years, 6 months ago

    A n s w e r 
    The given statement is True.

    We know that, if denominator is not given always we have to assume 1.

    So, reciprocal of 1/1 = 1/1

    0Thank You

    ANSWER

    • Posted by Deepanshu 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 4 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's the correct answer.... " Neutral substance are those substances which are neither acidic nor basic. The neutral substances that are the most well known are: water, table salt, sugar and cooking oil. "

    1Thank You

    Yash Thorat 5 years, 6 months ago

    The substance which is not acidic or basic is called neutral substance ex.sugar and water solution

    0Thank You

    Chag Kavyaa 5 years, 6 months ago

    Neutral substance are those which are neither acidic nor basic. The neutral substances that are the most known example are salt ,sugar,oil ( cooking )

    1Thank You

    Gaurav Seth 5 years, 6 months ago

    Neutral substance are those which are neither acidic nor basic. The neutral substances that are the most well known are: water, table salt, sugar and cooking oil. Cooking oil is a neutral substance.

    1Thank You

    ANSWER

    • Posted by Prince -Kumar 5 years, 6 months ago

    CBSE > Class 07 > English
    • 0 answers
    ANSWER

    • Posted by Manassvi Rathore 5 years, 6 months ago

    CBSE > Class 07 > Mathematics
    • 2 answers

    Yogita Ingle 5 years, 6 months ago

    (-19) +5=5+______

    (-19)

    1Thank You

    Jay And Jiya Patel 5 years, 6 months ago

    Ans _____ = (-19)

    0Thank You

    ANSWER

    • Posted by Manoj Kr 5 years, 6 months ago

    CBSE > Class 07 > हिंदी
    • 0 answers
    ANSWER

    • Posted by Pooja Sharma 5 years, 6 months ago

    CBSE > Class 07 > English
    • 1 answers

    Navroopdeep Kaur 5 years, 5 months ago

    Strange or odd

    0Thank You

    ANSWER

    • Posted by Radhika Bhalika 5 years, 6 months ago

    CBSE > Class 07 > French
    • 1 answers

    Rachna Bhagat 5 years, 5 months ago

    Dialogues hi khenge

    8Thank You

    ANSWER

    • Posted by Komal Gupta 5 years, 6 months ago

    CBSE > Class 07 > Sanskrit
    • 1 answers

    Shubhadarshi Tiwari 5 years, 6 months ago

    Asti means hai

    2Thank You

    ANSWER

    • Posted by Palak J 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 5 years, 6 months ago

    The female silk moth lays eggs. The larvae also known as caterpillar or silkworm hatches out from the egg and grows in size. As soon as the caterpillar gets ready to develop into pupa, it first weaves a net to hold itself and swings its head from side to side in the form of the figure of eight (8).

    During these movements the caterpillar secretes fibre made of a protein that hardens on exposure to air and becomes silk fibre. The caterpillar soon covers itself completely by a covering of silk fibres known as cocoon. The further development of the moth continues inside the cocoon. Silk fibres are used for weaving silk cloth.

    3Thank You

    ANSWER

    • Posted by Palak J 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 5 years, 6 months ago

    When the athlete runs in the race, his body needs more oxygen. His rate of breathing increases so that more oxygen can be supplied to the body. This is the reason, an athlete needs to breathe faster and deeper than usual; after finishing the race.

    1Thank You

    ANSWER

    • Posted by Shlok Kumar 5 years, 6 months ago

    CBSE > Class 07 > Computer
    • 0 answers
    ANSWER

    • Posted by Anushka Semwal 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's your correct answer....." Organisms that prepare their own food using simple substances are called autotrophs. For example, green plants. "

    2Thank You

    Anjali Jindal 5 years, 6 months ago

    Organisms that prepare their own food using simple substances are called autotrophs. Like green plants

    2Thank You

    Tejasvi . 5 years, 6 months ago

    Plants are autotrophs as they prepare their food themselves

    1Thank You

    ANSWER

    • Posted by Divyam Saini 5 years, 6 months ago

    CBSE > Class 07 > Sanskrit
    • 5 answers

    Aanya Bansal 5 years, 5 months ago

    संस्कृत

    0Thank You

    Vidushi Malik 5 years, 5 months ago

    Hey, here's your answer....... "संस्कृत"

    0Thank You

    Chag Kavyaa 5 years, 6 months ago

    संस्कृत

    0Thank You

    Saurya Singh 5 years, 6 months ago

    संस्कृत

    0Thank You

    Tejasvi . 5 years, 6 months ago

    संस्कृत

    1Thank You

    ANSWER

    • Posted by ?Maitri Prajapati? 5 years, 6 months ago

    CBSE > Class 07 > English
    • 1 answers

    Arya Patil__ 5 years, 6 months ago

    How is it different?

    0Thank You

    ANSWER
    3

    • Posted by Balaji Mishra 5 years, 6 months ago

    CBSE > Class 07 > हिंदी
    • 0 answers
    ANSWER

    • Posted by Krrish Saini 5 years, 6 months ago

    CBSE > Class 07 > Sanskrit
    • 0 answers
    ANSWER

    • Posted by Tejasvi . 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's your answer... " Given Initial reading of odometer = 57321.0 km Final reading of odometer = 57336.0 km Initial Time = 8:30 AM Final Time = 8:50 AM We know that Odometer measure the distance travelled by the car So Total distance covered by car= Final reading of odometer - Initial reading of odometer =57336.0 - 57321.0 = 15.0 km Total time taken by Car = Final Time - Initial Time =8:50 AM - 8:30 AM = 20 minutes= 20/60 hrs. = 1/3 hrs. Now Speed of the car is defined as = Total distance covered/Total time taken = 15.0/20 = 0.75 km/min Also Speed of the car in km/hr. =15/ (1/3) = 45 km/hr. "

    0Thank You

    Chag Kavyaa 5 years, 6 months ago

    35 km/h is your answer hope it helps you

    0Thank You

    Deepanshu 5 years, 6 months ago

    35 km/h

    0Thank You

    ANSWER

    • Posted by Tejasvi . 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Vidushi Malik 5 years, 5 months ago

    Hey, here's your answer... " Given Initial reading of odometer = 57321.0 km Final reading of odometer = 57336.0 km Initial Time = 8:30 AM Final Time = 8:50 AM We know that Odometer measure the distance travelled by the car So Total distance covered by car= Final reading of odometer - Initial reading of odometer =57336.0 - 57321.0 = 15.0 km Total time taken by Car = Final Time - Initial Time =8:50 AM - 8:30 AM = 20 minutes= 20/60 hrs. = 1/3 hrs. Now Speed of the car is defined as = Total distance covered/Total time taken = 15.0/20 = 0.75 km/min Also Speed of the car in km/hr. =15/ (1/3) = 45 km/hr. "

    1Thank You

    Deepanshu 5 years, 6 months ago

    35 km/h

    0Thank You

    Tejasvi . 5 years, 6 months ago

    Yaar some one please please please tell

    0Thank You

    ANSWER

    • Posted by Anikesh Dhakad 5 years, 6 months ago

    CBSE > Class 07 > हिंदी
    • 3 answers

    Sanjana Manish Pardeshi 5 years, 5 months ago

    Satluj

    0Thank You

    Shobha Devi 5 years, 6 months ago

    Parbati

    0Thank You

    Aman Agrawal 5 years, 6 months ago

    स्टलजी

    0Thank You

    ANSWER

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