Science (English Medium) इयत्ता १२ - CBSE Important Questions for English Core

Who was Selden? Why was he on the moor?

Write a character sketch of Mr. Barrymore in about 125 words

Describe Miss Stapleton's first encounter with Sir Henry in about 125 words

Read the passage given below and answer the questions that follow: 

The term dietary fibres refers collectively to indigestible carbohydrates present in plant foods. The importance of these dietary fibres came into the picture when it was observed that the people having diet rich in these fibres, had low incidence of coronary heart disease, irritable bowel syndrome, dental caries and gall stones.

The foodstuffs rich in these dietary fibres are cereals and grains, legumes, fruits with seeds, citrus fruits, carrots, cabbage, green leafy vegetables, apples, melons, peaches, pears etc.

These dietary fibres are not digested by the enzymes of the stomach and the small intestine whereas most of other carbohydrates like starch and sugar are digested and absorbed. The dietary fibres have the property of holding water and because of it, these get swollen and behave like a sponge as these pass through the gastrointestinal tract. The fibres add bulk to the diet and increase transit time in the gut. Some of these fibres may undergo fermentation in the colon.

In recent years, it has been considered essential to have some amount of fibres in the diet. Their beneficial effects lie in preventing coronary heart disease, and decreasing cholesterol level. The fibres like gums and pectin are reported to decrease postprandial (after meals) glucose level in blood. These types of dietary fibres are recommended for the management of certain types of diabetes. Recent studies have shown that the fenugreek (Methi) seeds, which contain 40 per cent gum, are effective in decreasing blood glucose and cholesterol levels as compared to other gum containing vegetables.

Some dietary fibres increase transit time and decrease the time of release of ingested food in colon. The diet having less fibres is associated with colon cancer and the dietary fibres may play a role in decreasing the risk of it.

The dietary fibres hold water so that stools are soft, bulky and readily eliminated. Therefore high fibre intake prevents or relieves constipation.

The fibres increase motility of the small intestine and the colon and by decreasing the transit time there is less time for exposure of the mucosa to harmful toxic substances. Therefore, there is a less desire to eat and the energy intake can be maintained within the range of requirement. This phenomenon helps in keeping a check on obesity. Another reason in helping to decrease obesity is that the high-fibre diets have somewhat lower coefficients of digestibility.

The dietary fibres may have some adverse effects on nutrition by binding some trace metals like calcium, magnesium, phosphorus, zinc and others and therefore preventing their proper absorption. This may pose a possibility of nutritional deficiency especially when diets contain marginal levels of mineral elements. This may become important constraints on increasing dietary fibres. It is suggested that an intake of 40 grams dietary fibres per day is desirable.

(Extracted from ‘The Tribune’)

(a) On the basis of your reading of the above passage make notes on it in points only, using recognizable abbreviations wherever necessary. Also suggest a suitable title. (5)

(b) Write a summary of the above in about 80 words. (3)

Read the extract given below and answer the questions that follow:

Perhaps the Earth can teach us

as when everything seems dead

and later proves to be alive.

Now I’ll count upto twelve

and you keep quiet and I will go.

(i) What does the Earth teach us? (1)

(ii) What does the poet mean to achieve by counting upto twelve? (1)

(iii) What is the significance of ‘keeping quiet’? (1)

Answer any three of the following in 30-40 words each:

(a) Why has the poet’s mother been compared to the ‘late winter’s moon’?

(b) The poet says, ‘And yet, for these Children, these windows, not this map, their world.’ Which world do these children belong to? Which world is inaccessible to them?

(c) What was the plea of the folk who had put up the roadside stand?

(d) What will happen to Aunt Jennifer’s tigers when she is dead?

Read the following extract and answer the questions given below:

If you do not get lowered in your own eyes
While you raise yourself in those of others,
If you do not give in to gossips and lies
Rather heed them not, saying, 'who bothers?'
You may be the person I am looking for.
If you crave not for praise when you win
And look not for sympathy while you lose,
If cheers let not your head toss or spin
And after a set-back, you offer no excuse,
You may be the person I and looking for.

(1) What should be your reaction towards gossips and lies?
(2) Who are your role models? Why?
(3) Give the rhyming pairs of words from the first stanza.
(4) Which line is repeated in this extract and what is its effect?

Read the follow ing extract and answer the questions given below:

Not gold but only men can make
A people great and strong;
Men who for truth and honor's sake
Stand fast and suffer long.

Brave men who work while others sleep,
Who dare while others fly...

They build a nation's pillars deep
And lift them to the sky.

(1) What makes a nation strong?
(2) According to you, what makes India a strong and powerful nation?.
(3) Write down the rhyme scheme used in the extract.
(4) What does the phrase 'others fly ... ' mean?

Read the following extract and answer the questions given  below:

While I lay awake in bed,
God's still small voice came to me and said,
"While dealing with a stranger, common courtesy you use,
But the children you love, you seem to abuse.
Look on the kitchen floor,
You'll find some flowers there by the door.
Those are the flowers she brought for you.
She picked them herself, pink, yellow and blue.
She stood quietly not to spoil the surprise,
And you never saw the tears in her eyes."

(1) What did the mother think as she lay sleepless in the bed?
(2) According to you, why shouldn't we hurt the feelings
of others?
(3) Pick out any two pairs of rhyming words from this
extract.
(4) What kind of poem is this? What is its purpose?

Read the following extract and answer the questions given below:

How do you know
Peace is a woman?
 I know, for
I met her yesterday
on my winding way 
to the world's fare.
She had such a wonderful face
just like a golden flower faded
before her prime.

(1) How does the poet describe the face of peace?
(2) Do you think there is a way out of the war-ridden world? What is it?.
(3) Name and explain the figure of speech in the following line:
"I met her yesterday 
on my winding way."
(4) The poet asks the question and herself answers it. What effect does it create in the extract?

Chimps making their own fishing rods is an indication that 

We know that chimps are intelligent because 

Orangutans use big leaves during a downpour because

The black kite may start a fire because

Big male elephants throw logs at electric fences because 

Why are animals considered as intelligent as humans ? 

What strategy do chimps use to open hard shells and fruits ? 

What do elephants do to prevent water from evaporating ? 

Give an example from the passage that proves the crow to be an intelligent bird.

How does a black kite spread wildfire ?