Compulsory Science and Technology Question Paper 2082 KP (Old Question)

Which of the following signals can be coded?

i. Analogue

ii. Baseband

iii. Digital

iv. Broadband

Which of the following is correct about sex determination of embryo?

i. Embryo will develop into a male because of X chromosome.

ii. Embryo will develop into a male because of Y chromosome.

iii. Gender cannot be determined on the basis of X chromosome.

iv. Embryo will develop into a female because of Y chromosome.

Which of the following pairs is correct?

i. a-iii, b-i, c-ii

ii. a-ii, b-iii, c-i

iii. a-ii, b-i, c-iii

iv. a-iii, b-ii, c-i

If a stone is dropped from the top of the tower having height 22.05 m, how long does it take to reach the ground?

i. 1 second

ii. 1.5 second

iii. 2 second

iv. 2.5 second

, and are the weights of an object on weighing by a spring balance in air, water and oil, respectively. What is the correct ascending order of given weights?

i.

ii.

iii.

iv.

Which of the following is the characteristics of the image of the object kept in front of the convex lens as shown in the figure?

i. The image is virtual and magnified

ii. The image is virtual, inverted and diminished

iii. The image is real, inverted and diminished

iv. The image is real and magnified

Which of the following is the source of alternating current?

i. dry cell

ii. solar panel

iii. dynamo

iv. voltaic cell

Which of the following is the correct about saturated hydrocarbon?

i. Four bonds between carbon-carbon and general formula

ii. Carbon-carbon has double or triple bond and general formula

iii. Carbon-carbon has a single bond and general formula

iv. Carbon-carbon has a single and double bond and general formula

Which of the following is a soapless soap?

i. Sodium chloride

ii. Alkyl benzene sulphonate

iii. Sodium palmitate

iv. Sodium sulphate

Which of the following is a natural food preservative?

i. Mixing sodium benzoate

ii. Mixing potassium sorbate

iii. Mixing benzoic acid

iv. Mixing with oil

Identify a dependent variable in Ohm's law V = IR.

Write any one function of RBC.

Write any one measure to conserve rare birds in Nepal.

On which principle does Hydraulic brake work?

If Y is a metal, what is its valency in given product of the chemical equation?

Write a difference between roasting and calcination.

Draw a labelled diagram to purify impure copper by electrorefining process.

IVF is a boon for childless couples, why?

Although shampoo and detergents are better cleaning agents, they degrade our environment. Suggest one natural alternative to such chemical cleansers.

Check the validity of equation S=ut+ 2 1 at 2 by unit-wise analysis.

Differentiate between bat and pigeon on the basis of reproduction and habitat.

Two plants are shown in the picture.

Write the name of the process X and Y in the given concept map.

Y X

Drone bee--------honey bee------------queen bee

The animal development center conducts a camp to fertilize many cows at a time. Which technique would be more appropriate for the organization to adopt? Write any one advantage of that technique.

Write two main reasons for the gradual increase in the average temperature of the environment.

Mass of a planet is kg and its radius is 71,000 km, calculate its acceleration due to gravity of the planet.

Derive the relation , where the symbols carry their usual meanings.

The temperature of 800 g of metal is and it is placed in 1.5 kg water at . If both of them acquire the temperature of , calculate the specific heat capacity of the metal.

What is meant by the anomalous expansion of water? Write any one effect of it in daily life.

Write any two differences between the given two chemical equations.

a.

b.

The graph shows the relation between velocity and distance of celestial bodies. Write the equation related to this graph. To which study is the graph related?

Study the given figures and write any two differences between them on the basis of defect of vision.

Given below is a notice published by Police Headquarters, Cyber Bureau. Activities such as unknown persons blackmailing people to send obscene photos and videos by saying 'I'm calling from cyber security' or 'I'm speaking from cyber police program', and posting them on social media for character assassination.

Study the given table.

The following results were obtained when the blood samples of four people were tested.

Show with a suitable ray diagram, the conditions for total internal reflection.

The value of output voltage is 10 times less than input voltage in the given figure.

Write any two differences between s-block elements and p-block elements.

Study the given diagram and answer the following questions.