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Class X

SCIENCE IMPROVEMENT EXAM (X plato (old))
Multiple choice questions. All questions are compulsory.
Points:
25/25
1.Emulsification of fat isSingle choice.
(1/1 Point)
Message for respondents who select this answer
Correct answers: Breakdown of large fat globules into smaller one
2.State the role to determine the direction of magnetic field produced around a straight conductor carrying currentSingle choice.
(1/1 Point)
Correct answers: Right hand thumb rule
3.What do you understand by reflection of lightSingle choice.
(1/1 Point)
Message for respondents who select this answer
Correct answers: The bouncing back of light from a smooth surface
4.What is the effect of DNA copying which is not perfectly accurate on the reproduction processSingle choice.
(1/1 Point)
Correct answers: Variation
5.What happens to the temperature of water when few drops of concentrated sulphuric acid is added to itSingle choice.
(1/1 Point)
Correct answers: Increases
6.Name the excretory products other than O2 and CO2 in plantsSingle choice.
(1/1 Point)
Correct answers: All of the above
7.Mention how organism like bread moulds and mushrooms obtain their foodSingle choice.
(1/1 Point)
Correct answers: Saprophytic
8.What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is + 3Single choice.
(1/1 Point)
Correct answers: Virtual and erect
9.What is the scientific name of garden peaSingle choice.
(1/1 Point)
Correct answers: Pisum sativum
10.In which type of chemical reaction heat is evolvedSingle choice.
(1/1 Point)
Correct answers: Exothermic reaction
11.How does carbon attain noble gas configurationSingle choice.
(1/1 Point)
Correct answers: By sharing of electron
12.Why do different components of white light deviates through different angles when passing through a triangular glass prism.Single choice.
(1/1 Point)
Correct answers: Because of different wavelength or colours
13.An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water . What is this element likely to beSingle choice.
(1/1 Point)
Correct answers: Calcium
14.What is geneSingle choice.
(1/1 Point)
Correct answers: Unit of inheritance
15.Between which two points related to a concave mirror should an object be placed to obtain on a screen an image twice the size of the objectSingle choice.
(1/1 Point)
Correct answers: Between centre of curvature and principal focus
16.The sex chromosome in a girl child areSingle choice.
(1/1 Point)
Correct answers: XX
17.Chemicals like--------- have harm the ozone layer.Single choice.
(1/1 Point)
Correct answers: CFC
18.Dispersion of white light by a glass prism showsSingle choice.
(1/1 Point)
Correct answers: Spectrum
19.Which of the following is sexually transmitted diseaseSingle choice.
(1/1 Point)
Correct answers: Syphilis
20.The soil becomes ----------when its pH is more acidic than the desired valueSingle choice.
(1/1 Point)
Correct answers: Toxic
21.During respiration exchange of gases take place inSingle choice.
(1/1 Point)
Message for respondents who select this answer
Correct answers: Alveoli of lungs
22.Ohm's law states the relationship betweenSingle choice.
(1/1 Point)
Message for respondents who select this answer
Correct answers: Electric current and potential difference
23.Which of the following is not a part of the female reproductive system in human beings.Single choice.
(1/1 Point)
Correct answers: Vas deferens
24.Corrosion of metals can be prevented bySingle choice.
(1/1 Point)
Correct answers: All of these
25.Name the acid present in the tomatoSingle choice.
(1/1 Point)
Message for respondents who select this answer
Correct answers: Citric acid

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