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

a. Which of the following activities involves digital signal?

i. Talking with each other

ii. Chatting on the internet (Correct)

iii. Watching antenna connected TV

iv. Speaking through a loudspeaker

Which of the following group belongs to Plant Kingdom?

i. Fungi

ii. Protista

iii. Algae

iv. Monera

Which blood vessel carries the deoxygenated blood from the heart to the lungs?

i. Vena cava

ii. Pulmonary artery

iii. Pulmonary vein

iv. Aorta

Which of the following reptiles is NOT included in the list of protected animals of Nepal?

i. Gharial crocodile

ii. Python

iii. Golden monitor lizard

iv. Turtle

What will be the weight of an object on the planet having acceleration due to gravity if the object weighs on the Earth?

i.

ii.

iii.

iv.

Why does an empty plastic bottle forcefully pushed into the water come up when it is released?

i. Due to upthrust exerted by the bottle on water

ii. Due to upthrust exerted by the water on plastic bottle

iii. Due to pressure of water on plastic bottle

iv. Due to pressure of plastic bottle on water

Study the given figure and identify the colour of and .

i. - red, - yellow

ii. - violet, - red

iii. - green, - violet

iv. - red, - violet

Which theory is closely related to Hubble's study?

i. Heliocentric theory

ii. Geocentric theory

iii. Big-Bang theory

iv. Hubble's theory

Which of the following is the alkyne having 5 carbon atoms?

i. Pentane

ii. Pentene

iii. Pentyne (Correct)

iv. Pentyl

Which of the following is a group of rodenticides?

i. Malathion, aldrin, benzene hexachloride

ii. DDT, sodium chloride, aldrin

iii. Potassium chloride, aldrin, malathion

iv. Bromadiolone, coumatetralyl, zinc phosphide

Which of the dependent variable in the experiment where solubility of sugar is measured at different temperatures?

Arrange the following animals based on the order of evolution. Cockroach, Earthworm, Fish, Frog

What is systolic blood pressure?

State the law of pressure that can be verified by the given figure.

If the power of lens is , find its focal length.

Draw a ray diagram of the image formed by the lens having a focal length of and the object is kept at away.

What is meant by the frequency of alternating current in our country is ?

In the given graph of future of the universe, what type of universe does 'B' represent?

Write the balanced chemical equation when dust formed by burning magnesium ribbon is added to water.

Test the validity of by unit-wise analysis.

Write any two characteristics of the division of Marchantia.

Though males have both and sex chromosomes, some of them have only sons and some have only daughters. Why? Write with reason.

What type of cell division takes place during the formation of gametes?

Write a function of worker bee done during 1 - 3 days and 18 - 20 days of each.

Your friend needs a strength-enhancing medicinal herb. In this situation, which herb would you advise your friend to use? Write down any one method of conservation of this medicinal herb.

Between the top of the mountain and its base, where will an object weigh more? Write with reason.

What is the gravitational force of attraction between these two heavenly bodies? In which condition, gravitational force of attraction is equal to gravitational constant?

A charger has a transformer which reduces supply voltage from 220 V to 5 V. Calculate the ratio of number of turns in the primary coil to that of the secondary coil.

Write any two ways to increase the induced current in a dynamo.

Write any one balanced chemical equation of a reaction that uses a catalyst.

The given circuit diagram is used for the electrorefining of a metal which is extracted from Argentite ore. Identify the two main errors in this circuit.

Write the differences between alkane and alkyne on the basis of number of bonds and general molecular formula.

'It is good to use traditional and chemical-free method to ripen fruits.' Give any two arguments to support this statement.

Nowadays, Facebook messenger is used for talking with friends through social media.

Some information about blood cells is given in the table below:

Heat energy required to heat 2000 g of three different liquids by 20 °C is shown in the table:

Draw a labelled diagram of strands of cell having hereditary characters with nitrogen bases.

Study the given diagram

A part of the modern periodic table is given. The symbols given in the table are not real symbols of elements:

Study the given picture and answer the following questions: