Test Series no. 3 on Science

Test series on Science

Test series no -3

MCQ on Science for competitive Exams

(Check Answers from last page)

1- Consider the following statements and choose the correct option/s.

(a) When an ultrasound travels from one medium to the other medium, its wavelength, frequency and speed changes.

(b) The frequency of an ultrasound wave remains almost unchanged while travelling from one medium to the other medium.

(c) The frequency and speed of an ultrasound wave change when travelling from one medium to the other medium.

(d) Echocardiography is a technique used in medical diagnostics, employs ultrasound


(A) Statement (b) and (d)

(B) Statement (a) and (b)

(C) Statement (c) and (d)

(D) Statement (d) and (a)


2- A person is not able to see distant objects clearly. Which of the following statement/s are true?

(a) The person is suffering from Hypermetropia

(b) The defect may have been caused due to excessive curvature of the eye lens or elongated of the eye ball.

(c) The defect may be corrected by using a concave lens of suitable power.

(d) The defect can be corrected by using a convex lens of suitable power


(A) Statement (b) and (c)

(B) Statement (a) and (b)

(C) Statement (c) and (d)

(D) Statement (d) and (b)


3- Match the following cell organelle listed in column A and their function in column B.

Column A                                                   Column B

(a) Golgi body                                                 (i) Digestion

(b) Smooth endoplasmic reticulum           (ii) Formation of liposome

(c) Ribosome                                                  (iii) Protein synthesis

(d) Liposome                                                  (iv) Lipid synthesis

(A) (a)-(i),     (b)-(ii),    (c)-(iii),    (d)-(iv)

(B) (a)-(ii),    (b)-(iv),   (c)-(iii),     (d)-(i)

(C) (a)-(iii),   (b)-(iv),   (c)-(ii)       (d)- (i)

(D) None of the above


4- Which of the following group of disease comprises genetic diseases?

(A) AIDS, Hepatitis, Colour blindness

(B) Sickle cell anemia, AIDS, Cancer

(C) Sickle cell anemia, Hemophilia, Down syndrome

(D) All of the above


5- Consider the following statement/s about Yeast is/are correct?

(a) Yeasts are fungi

(b) Yeast can form Pesudomycelium

(c) Yeast Reproduce asexually by budding

(d) Yeasts are facultative anaerobes

(e)  All yeasts are dimorphic

(f) All yeasts are pathogenic

(A) (a), (d), (e), (f)

(B) (c), (d), (e), (f)

(C) (b), (c), (d), (e)

(D) (a), (b), (c), (d)


6- A vitamin that functions both as a hormone and a visual pigment?

(A) Thiamine

(B) Retinal/ Retinol

(C) Folic acid

(D) Riboflavin


7- The total percentage of carbon present in our human body is

(A) 10-18%

(B) 18-19 %

(C) 20-25 %

(D) None of the above


8- During expiration the air will leave the lungs when pressure inside the lungs must becomes

(A) Lower than atmospheric pressure

(B) Equal to atmospheric pressure

(C) Higher than atmospheric pressure

(D) None of the above


9- Which of the following is not a preservative?

(A) Sorbic acid salts

(B) Sodium benzoate

(C) Potassium metabisulphite

(D) Dulcin


10- Which of the following option/s is/are correct in respect of the electric current used in day to day at our home?

(a) Microwave and television uses dc current

(b) Refrigerator and washing machine uses ac current

(c ) Air cooler and air conditioner uses ac current

(d) Most of the devices use 220 amphere current

(e) Magnitude of current passing through different devices is same

(A) Only (b) and (c)

(B) Only (a) and (b)

(C) Only (d) and (c)

(D) (a), (b), (c), (d), (e) all are correct


11- Consider the following option and choose the correct one

(a) The magnetic field lines emerge from the north pole and merge at the south pole of a bar magnet.

(b) The direction of magnetic field is taken to be the direction in which the north pole of a compass needle moves.

(c) The relative strength of the magnetic field is shown by the degree of closeness of the field lines.

(d) There is no field inside a bar magnet.

(A) Option (d)

(B) Option (c)

(C) Option (a) and (b)

(D) Option (a), (b), (c)


12- Consider the statements and choose the right option

(a) An electric motor converts electrical energy into mechanical energy.

(b) Both electric motor and generator works on the same principle.

(c) An electric generator converts mechanical energy into electrical energy


(A) Option (a) (b) and (c)

(B) Option (b) and (c)

(C) Option (a) and (b)

(D) Option (a) and (c)


13- Choose the correct option

(1) Evaporation is a surface phenomenon which means particles from the surface change into vapour state.

(2) Boiling is a bulk phenomenon, which means particles from the bulk of the liquid change into vapour state.

(3) Deposition is the change of gaseous state directly to solid without converting into the liquid state.

(4) The state of matter can be changed by changing its temperature


(A) Option (1), (2), (3)

(B) Option (1) and (2)

(C) Option (3) and (4)

(D) Option (2), (3) and (4)


14- Match the List I with List II

List I                                                                                              List II

1. Camphor from solid sodium chloride                                a. Chromatography

2. Different pigments from an extract of flower petals     b. Distillation

3. Acetone and water mixture                                                 c. Centrifugation

4. Butter from cream                                                                 d. Sublimation

(A) 1-a,          2-b,         3-c,         4-d

(B) 1- d,        2-a,          c-b,         4-c

(C) 1-c,         2-b            c-d          4-a

(D) None of the above


15-Photosynthesis is the process that helps green plants synthesizes their food. A cascade of events and chemical reactions takes place in a specified sequential order. Choose an event that does not take place in photosynthesis.

(A) Splitting of water

(B) Absorption of light energy by chlorophyll

(C) Oxidation of carbon to carbon dioxide

(D) All of the above


16- A couple suspects a mix up of their new born baby in the hospital. Blood typing is sought to resolve the dispute. The man has blood group A and woman has a blood group B. Their biological child can have blood group.

(A) A or B or AB

(B) Either A or B

(C) A or B or O or AB

(D) Only AB


17- Consider the following

i. Nitrification is the process in which nitrates are converted to nitrogen.

ii. Denitrification is a process in which nitrogen is converted into nitrates.

iii. Nucleic acids contains nitrogen

iv. Nitrogen Fixing bacteria are present in root legumes.

v. During atmospheric lightening nitrogen in the air gets converted into oxides of nitrogen


(A)  iii, iv, v options are correct

(B)  i, ii, iii options are correct

(C) i , ii, iii, iv, v option are correct

(D) None of the above


18- Choose the correct options about Lichens

i. Lichens are autotrophs

ii. Lichens are symbolic lifeform

iii. Lichens are fungi

iv. Lichens are algae

(A) Option i, ii, iii and iv

(B) Option i, and ii are correct

(C) Option iii, iv are correct

(D) None of the above


19- Following are some processes involving change of state

a. Evaporation of water

b. Burning of candle

c. Dissolution of sugar in water

d. Electrolysis of water to form hydrogen and oxygen

(A) Option a, b, c, d are correct

(B) Only a

(C) Only b

(D) None of the above


20- Consider the following statements and choose which are not correct?

a. Plaster of Paris is obtained on heating gypsum.

b. Sodium carbonate is an important constituent of baking powder.

c. Bleaching powder can also act as an oxidizing agent.

d. Sodium hydroxide is produced by passing electricity through the aqueous solution of sodium chloride


(A) All options are incorrect

(B) Option a

(C) Option c

(D) Option b