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251.

Explain how effective the modern machines are in combating pollution.

Answer»

Explain how effective the modern machines are in combating pollution.

252.

Which one of the following is an example of physical weathering?

Answer»

Which one of the following is an example of physical weathering?


253.

Fill in the blanks:1. ………….. are collective activities spread over a period of time.2. A specific pattern is followed in ……………… cropping.3. The scientific and systematic management of animal live stock is known as ………………. .

Answer»

Fill in the blanks:



1. ………….. are collective activities spread over a period of time.



2. A specific pattern is followed in ……………… cropping.



3. The scientific and systematic management of animal live stock is known as ………………. .

254.

84. Explain Einstein unification of forces

Answer» 84. Explain Einstein unification of forces
255.

Give any two examples of the ways in which European dress codes were different from Indian dress codes.

Answer»

Give any two examples of the ways in
which European dress codes were different from Indian dress codes.

256.

निम्नलिखित प्रश्न के उत्तर (50-60 शब्दों में) लिखिए−अपने जीवन की किसी ऐसी घटना का उल्लेख कीजिए जब−(1) शुद्ध आदर्श से आपको हानि-लाभ हुआ हो।(2) शुद्ध आदर्श में व्यावहारिकता का पुट देने से लाभ हुआ हो।

Answer»

निम्नलिखित प्रश्न के उत्तर (50-60 शब्दों में) लिखिए



अपने जीवन की किसी ऐसी घटना का उल्लेख कीजिए जब



(1) शुद्ध आदर्श से आपको हानि-लाभ हुआ हो।



(2) शुद्ध आदर्श में व्यावहारिकता का पुट देने से लाभ हुआ हो।

257.

बाज़ार पर आधारित लेख नकली सामान पर नकेल ज़रूरी का अंश पढ़िए और नीचे दिए गए बिंदुओं पर कक्षा में चर्चा कीजिए।(क) नकली सामान के खिलाफ़ जागरूकता के लिए आप क्या कर सकते हैं?(ख) उपभोक्ताओं के हित को मद्देनज़र रखते हुए सामान बनाने वाली कंपनियों का क्या नैतिक दायित्व हैं?(ग) ब्रांडेड वस्तु को खरीदने के पीछे छिपी मानसिकता को उजागर कीजिए?

Answer» बाज़ार पर आधारित लेख नकली सामान पर नकेल ज़रूरी का अंश पढ़िए और नीचे दिए गए बिंदुओं पर कक्षा में चर्चा कीजिए।



(क) नकली सामान के खिलाफ़ जागरूकता के लिए आप क्या कर सकते हैं?



(ख) उपभोक्ताओं के हित को मद्देनज़र रखते हुए सामान बनाने वाली कंपनियों का क्या नैतिक दायित्व हैं?



(ग) ब्रांडेड वस्तु को खरीदने के पीछे छिपी मानसिकता को उजागर कीजिए?



258.

Question 11In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to(a) soil erosion(b) soil conservation(c) soil pollution(d) soil fertility

Answer» Question 11

In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to



(a) soil erosion

(b) soil conservation

(c) soil pollution

(d) soil fertility
259.

What is tropical depression in India ?

Answer» What is tropical depression in India ?
260.

On summer solstice the angle of sun rays at Antarctic Circle are –

Answer»

On summer solstice the angle of sun rays at Antarctic Circle are –


261.

To convert one state of water into another, which physical quantity has to be changed?

Answer» To convert one state of water into another, which physical quantity has to be changed?
262.

Q60. Which one of the following tiger Reserves becomes first in India to get official Mascot?

Answer»

Q60. Which one of the following tiger Reserves becomes first in India to get official Mascot?


263.

1. What kind of place is Innisfree? Think about:(i) the three things the poet wants to do when he goes back there (stanza I);(ii) what he hears and sees there and its effect on him (stanza II);(iii) what he hears in his “heart’s core” even when he is far away from Innisfree (stanza III).2. By now you may have concluded that Innisfree is a simple, natural place, full of beauty and peace. How does the poet contrast it with where he now stands? (Read stanza III).3. Do you think Innisfree is only a place, or a state of mind? Does the poet actually miss the place of his boyhood days?

Answer»

1. What kind of place is Innisfree? Think about:

(i) the three things the poet wants to do when he goes back there (stanza I);

(ii) what he hears and sees there and its effect on him (stanza II);

(iii) what he hears in his “heart’s core” even when he is far away from Innisfree (stanza III).

2. By now you may have concluded that Innisfree is a simple, natural place, full of beauty and peace. How does the poet contrast it with where he now stands? (Read stanza III).

3. Do you think Innisfree is only a place, or a state of mind? Does the poet actually miss the place of his boyhood days?

264.

You would have read that trees take water from the soil and use it by tanspiration. This implies that in a forest, trees will reduce groundwater by losing it in transpiration. Do you agree? Give reasons.

Answer» You would have read that trees take water from the soil and use it by tanspiration. This implies that in a forest, trees will reduce groundwater by losing it in transpiration. Do you agree? Give reasons.
265.

The narrator says that life has no geographical bounds implying that __________. (i) human beings are essentially the same everywhere (ii) boundaries exist only on maps (iii) one should work towards the good of mankind (iv) he was happy to travel to other countries

Answer»


The narrator says
that life has no geographical bounds implying that __________.



(i) human beings
are essentially the same everywhere



(ii) boundaries
exist only on maps



(iii) one should
work towards the good of mankind



(iv) he was happy
to travel to other countries

266.

Explain water cycle in 3 -4 sentences.

Answer» Explain water cycle in 3 -4 sentences.


267.

Question 3 (ii) (ii) Which month or season do you think this data is about? 98.198.699.290.386.595.392.996.394.295.189.292.397.193.592.795.197.293.395.297.396.292.184.990.295.798.397.396.192.189

Answer» Question 3 (ii)
(ii) Which month or season do you think this data is about?
98.198.699.290.386.595.392.996.394.295.189.292.397.193.592.795.197.293.395.297.396.292.184.990.295.798.397.396.192.189
268.

The area of the floor of a room is 15 m2. If its height is 4 m, then the volume of the air contained in the room is(a) 60 dm3(b) 600 dm3(c) 6000 dm3(d) 60000 dm3

Answer» The area of the floor of a room is 15 m2. If its height is 4 m, then the volume of the air contained in the room is



(a) 60 dm3



(b) 600 dm3



(c) 6000 dm3



(d) 60000 dm3
269.

Why is forest important to us? What are the services get from forest?

Answer» Why is forest important to us? What are the services get from forest?
270.

A metal form two oxides. The higher oxide contains 80%metal. 0.72g of the lower oxide gave 0.8g of higher oxide when oxidised. Then the ratio of weight of the oxygen that combines with the fixed weight of the metal in the two oxides .

Answer» A metal form two oxides. The higher oxide contains 80%metal. 0.72g of the lower oxide gave 0.8g of higher oxide when oxidised. Then the ratio of weight of the oxygen that combines with the fixed weight of the metal in the two oxides .
271.

Question 8Explain how CO2 is able to control fires.

Answer» Question 8

Explain how CO2 is able to control fires.
272.

A solution contains 15% alcohol How much pure alcohol should be added to make the percentage of alcohol 32%?

Answer» A solution contains 15% alcohol How much pure alcohol should be added to make the percentage of alcohol 32%?
273.

In the month of October 34000 people visited the museum but only 32000 pleople visited inthe month November find the decrease percent in the number of visitors?

Answer» In the month of October 34000 people visited the museum but only 32000 pleople visited inthe month November find the decrease percent in the number of visitors?
274.

With many a curve my banks I fret’- What does the poet mean by this statement?

Answer»

With
many a curve my banks I fret’- What does the poet mean by this
statement?

275.

Which among the following is the largest glacier?

Answer» Which among the following is the largest glacier?
276.

Arrange the following modes of transportation from the earliest to the newest ones.

Answer»

Arrange the following modes of transportation from the earliest to the newest ones.



277.

निम्नलिखितप्रश्न का उत्तरदीजिए −'मधुर-मधुर,पुलक-पुलक,सिहर-सिहरऔर विहँस-विहँस,कवयित्रीने दीपक को हरबार अलग-अलगतरह से जलने कोक्यों कहा है?स्पष्टकीजिए।

Answer»

निम्नलिखित
प्रश्न का उत्तर
दीजिए


'मधुर-मधुर,
पुलक-पुलक,
सिहर-सिहर
और विहँस
-विहँस,
कवयित्री
ने दीपक को हर
बार अलग
-अलग
तरह से जलने को
क्यों कहा है
?
स्पष्ट
कीजिए।

278.

Which form of utility is displayed when wheat is shifted from fields in to flour mills?

Answer»

Which form of utility is displayed when wheat is shifted from fields in to flour mills?


279.

निम्नलिखित प्रश्न का उत्तर (25-30 शब्दों में) लिखिए −पाठ में आए निम्नलिखित कथनों की व्याख्या कीजिए −(क) अंदर ही अंदर कहीं मेरा बटुआ काँप गया।(ख) अतिथि सदैव देवता नहीं होता, वह मानव और थोड़े अंशों में राक्षस भी हो सकता है।(ग) लोग दूसरे के होम की स्वीटनेस को काटने न दौड़ें।(घ) मेरी सहनशीलता की वह अंतिम सुबह होगी।(ङ) एक देवता और एक मनुष्य अधिक देर साथ नहीं रहते।

Answer»

निम्नलिखित प्रश्न का उत्तर (25-30 शब्दों में) लिखिए −

पाठ में आए निम्नलिखित कथनों की व्याख्या कीजिए −

(क) अंदर ही अंदर कहीं मेरा बटुआ काँप गया।

(ख) अतिथि सदैव देवता नहीं होता, वह मानव और थोड़े अंशों में राक्षस भी हो सकता है।

(ग) लोग दूसरे के होम की स्वीटनेस को काटने न दौड़ें।

(घ) मेरी सहनशीलता की वह अंतिम सुबह होगी।

(ङ) एक देवता और एक मनुष्य अधिक देर साथ नहीं रहते।

280.

What caused the Cambrian explosion?

Answer» What caused the Cambrian explosion?
281.

If average human lifespan were of order 10seconds,what would be revolution period of earth on this scale be??

Answer» If average human lifespan were of order 10seconds,what would be revolution period of earth on this scale be??
282.

Question 46Fill in the blanks to make the statements true.10g of caustic soda dissolved in 100ml of water makes a solution of caustic soda. Amount of caustic soda needed for 1 litre of water to make the same type of solution is ___.

Answer»

Question 46



Fill in the blanks to make the statements true.



10g of caustic soda dissolved in 100ml of water makes a solution of caustic soda. Amount of caustic soda needed for 1 litre of water to make the same type of solution is ___.



283.

What are drought-prone regions of India? Suggest Preventive measures and preparedness plan for drought mitigation.

Answer» What are drought-prone regions of India? Suggest Preventive measures and preparedness plan for drought mitigation.
284.

Write two examples of each.1. Animals living in mountain habitat.2. Animals that lay eggs.

Answer» Write two examples of each.

1. Animals living in mountain habitat.

2. Animals that lay eggs.
285.

are the most extensive relief feature of the Oceans.

Answer» are the most extensive relief feature of the Oceans.
286.

Q. मानसिक स्वास्थ्य देखभाल अधिनियम, 2017 के संदर्भ में निम्नलिखित कथनों पर विचार कीजिये:उपर्युक्त कथनों में से कौन सा/से असत्य है/हैं?

Answer»

Q. मानसिक स्वास्थ्य देखभाल अधिनियम, 2017 के संदर्भ में निम्नलिखित कथनों पर विचार कीजिये:



उपर्युक्त कथनों में से कौन सा/से असत्य है/हैं?



287.

नीचे दी गई पंक्तियों में निहित व्यंग्य को स्पष्ट कीजिए -(क) जूता हमेशा टोपी से कीमती रहा है। अब तो जूते की कीमत और बढ़ गई है और एक जूते पर पचीसों टोपियाँ न्योछावर होती हैं।(ख) तुम परदे का महत्व ही नहीं जानते, हम परदे पर कुर्बान हो रहे हैं।(ग) जिसे तुम घृणित समझते हो, उसकी तरफ़ हाथ की नहीं, पाँव की अँगुली से इशारा करते हो?

Answer»

नीचे दी गई पंक्तियों में निहित व्यंग्य को स्पष्ट कीजिए -

(क) जूता हमेशा टोपी से कीमती रहा है। अब तो जूते की कीमत और बढ़ गई है और एक जूते पर पचीसों टोपियाँ न्योछावर होती हैं।

(ख) तुम परदे का महत्व ही नहीं जानते, हम परदे पर कुर्बान हो रहे हैं।

(ग) जिसे तुम घृणित समझते हो, उसकी तरफ़ हाथ की नहीं, पाँव की अँगुली से इशारा करते हो?

288.

Why Covid-19 named as corona virus? Why nothing else other than this?

Answer» Why Covid-19 named as corona virus? Why nothing else other than this?
289.

35. 12 ml of mixture containing carbon monoxide and nitrogen required 7 ml oxygen to form CO2 and No on combustion the volume of carbon monoxide in the mixture will be

Answer» 35. 12 ml of mixture containing carbon monoxide and nitrogen required 7 ml oxygen to form CO2 and No on combustion the volume of carbon monoxide in the mixture will be
290.

•मैं अब इस तरह के उत्तरों की आदी हो चुकी हूँ।•उस बगीचे में अमलतास, सेमल, कजरी आदि तरह-तरह के पेड़ थे।ऊपर लिखे वाक्यों में रेखांकित शब्द देखने में मिलते-जुलते हैं, पर उनके अर्थ भिन्न हैं। नीचे ऐसे कुछ और समरूपी शब्द दिए गए हैं। वाक्य बनाकर उनका अर्थ स्पष्ट करो - अवधि - अवधी ओर - और में - मैं दिन - दीन मेल - मैल सिल - सील

Answer»

मैं अब इस तरह के उत्तरों की आदी हो चुकी हूँ।


उस बगीचे में अमलतास, सेमल, कजरी आदि तरह-तरह के पेड़ थे।


ऊपर लिखे वाक्यों में रेखांकित शब्द देखने में मिलते-जुलते हैं, पर उनके अर्थ भिन्न हैं। नीचे ऐसे कुछ और समरूपी शब्द दिए गए हैं। वाक्य बनाकर उनका अर्थ स्पष्ट करो -































अवधि



-



अवधी



ओर



-



और



में



-



मैं



दिन



-



दीन



मेल



-



मैल



सिल



-



सील




291.

What is temperature inversion? What are the different types of temperature inversion? What can be the economic implications of temperature inversion?

Answer»

What is temperature inversion? What are the different types of temperature inversion? What can be the economic implications of temperature inversion?
292.

Explain effect drago's rule in bond angle in Group 15.

Answer» Explain effect drago's rule in bond angle in Group 15.
293.

"खरगोश की–सी कातर आँखें"पशु-पक्षियों से तुलना करते हुए और भी बहुत-सी बातें कही जाती हैं जैसे – 'हिरन जैसी चाल'। ऐसे ही कुछ उदाहरण तुम भी बताओ।

Answer»

"खरगोश की–सी कातर आँखें"



पशु-पक्षियों से तुलना करते हुए और भी बहुत-सी बातें कही जाती हैं जैसे – 'हिरन जैसी चाल'। ऐसे ही कुछ उदाहरण तुम भी बताओ।

294.

Why was Harold upset that his father had not told him about his true identity? Give two reasons.

Answer»

Why
was Harold upset that his father had not told him about his true
identity? Give two reasons.

295.

The Clean Ganga Fund has been operationalized under Namami Gange programme. Consider the following statements about Clean Ganga Fund: Which of the following statements is/are incorrect?

Answer»

The Clean Ganga Fund has been operationalized under Namami Gange programme. Consider the following statements about Clean Ganga Fund:

Which of the following statements is/are incorrect?


296.

Is there a pond or river around your house or school? Go and look around and observe these things: Can you see algae in or around the water? Where else have you seen algae? Are there plants growing on the side or in water? Find out their names. Draw some of these in your note book. Do you think these were planted by someone or did they grow on their own? What else can you see in water? Make a list.

Answer»

Is there a pond or river around your house or school? Go and look around and observe these things:





  • Can you see algae in or around the water?




  • Where else have you seen algae?




  • Are there plants growing on the side or in water? Find out their names. Draw some of these in your note book.




  • Do you think these were planted by someone or did they grow on their own?




  • What else can you see in water? Make a list.





297.

Explain water cycle in 3 -4 sentences.

Answer» Explain water cycle in 3 -4 sentences.


298.

कहानी में बाघ को खतरनाक जानवर बताया गया है। नीचे दी गई सूची में सबसे खतरनाक चीज़ तुम्हारी समझ में क्या है और क्यों? चाकू, बिजली, टूटा हुआ काँच, आग

Answer»

कहानी में बाघ को खतरनाक जानवर बताया गया है। नीचे दी गई सूची में सबसे खतरनाक चीज़ तुम्हारी समझ में क्या है और क्यों?










चाकू, बिजली, टूटा हुआ काँच, आग






299.

Name the mountains which are the young fold mountain ranges that run across the northern, north west and north eastern boundary of India.

Answer»

Name the mountains which are the young fold mountain ranges that run across the northern, north west and north eastern boundary of India.


300.

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.Oxygen

Answer» Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.

Oxygen