10th Standard CBSE Syllabus & Materials
10th Standard CBSE
CBSE 10th Social Science ECO - Globalisation and the Indian Economy - New Model Questions Papers Study Material - QB365 Set A
NEW10th Standard CBSE
CBSE 10th Social Science ECO - Money and Credit - New Model Questions Papers Study Material - QB365 Set A
NEW10th Standard CBSE
CBSE 10th Social Science ECO - Sectors of the Indian Economy - New Model Questions Papers Study Material - QB365 Set A
NEW10th Standard CBSE
CBSE 10th Social Science ECO - Development - New Model Questions Papers Study Material - QB365 Set A
NEW10th Standard CBSE
CBSE 10th Social Science PS - Outcomes of Democracy - New Model Questions Papers Study Material - QB365 Set A
NEW10th Standard CBSE
CBSE 10th Social Science PS - Gender, Religion and Caste - New Model Questions Papers Study Material - QB365 Set A
Published on: 29/05/2021
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Questions + Answers key
Take MCQ Science Test1.
a - What is this structure called and give its state-open or closed?
b - Where are they present?
c - What controls the opening and closing of it?
d - Draw the opposite figure to this.
2.
A non-biodegradable toxic chemical has entered into the food chain. Which type of food habit will you suggest, vegetarian or non-vegetarian? Why?
3.
In comparing two ecosystems 'X' and 'Y', i is observed that 'X' has only first and second order consumers, while 'Y' has third, fourth and fifth order consumers. Which of the two would be more stable?
4.
Though your uncle has two cars, his son who is your classmate comes with you in school bus. What character of uncle would you appreciate?
5.
What are the factors that determine the focal length of a lens?
6.
A person has normal vision, but he cannot distinguish between red-green colour. Why?
7.
Does genetic combination of mother play a significant role in determining the sex of new born baby?
8.
(a)Is variations beneficial to the species?
(b)If yes, give reason.
(c)Is variation necessary for the individuals? Why?
9.
How will you decide whether the magnetic field at a point is due to some current carrying conductor or due to earth?
10.
Describe the areas where acids are most likely expected?
1.
(a) Open stomata
(b) In leaves
(c) Guard cells
(d) Closed stomata
2.
Vegetarian. This is because the concentration of non-biodegradable chemical increases with the number of trophic level in a food chain. Thus, man will get high concentration of the chemical in the non-vegetarian food than in the vegetarian food.
3.
'X' will be more stable.
4.
His concern to save natural resources.
5.
The focal length of a lens depends on
(a) Radii of curvature of the surface of the lens.
(b) Nature of material of the lens.
(c) Nature of medium in which lens is placed.
6.
A person who is blind to red-green colour may be deficient in cone shaped cell having red and green pigment in the retina of his eyes. It is a genetic disorder and not a refractive defect of vision. That is why such a person may have normal vision.
7.
No, the genetic combination of mother does not play any significant role in determining the sex of a newborn. This is because the female cell carries two X-chromosomes XX). While the male cell carries one X and one Y-chromosome. The fusion of X-chromosome (of male sperm cell) with X-chromosome (of female egg) produces a female child, while the fusion of Y-chromosome (of male sperm cell) with X-chromosome (of female egg) produces a male child. Therefore, it is the contribution of father which determines the sex of a newborn.
8.
(a)Yes.
(b)It enables a species for its survival.
(c)No
Reason: A favourable variation makes an organism to live better in a changed environment and an unfavourable variation will not. So, it is not necessary to be true that a variation is beneficial to the individuals.
9.
Place a compass needle at the given point. If it stays in the north-south direction. then the magnetic field is due to earth. If the needle points along any direction other than north-south direction, then the field is due to some current carrying conductor. If the current is switched off, the needle will orient itself along the north-south direction.
10.
Acid rains are most likely expected in industrial areas where there is emission of oxides of nitrogen and sulphur.
10th Standard CBSE Syllabus & Materials
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