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

Choose the best alternative of the following questions and write in the answer sheet.

a. What is a variable that is kept constant during the research period by the researcher called?

i. Independent variable

ii. Dependent variable

iii. Controlled variable

iv. Extraneous variable

What is the cause of systolic blood pressure?

i. Due to excessive pressure created in the heart

ii. Due to pressure produced in the left ventricle of the heart is transmitted to the artery

iii. Due to contraction of the artery at the time of contraction of left ventricle

iv. Pressure produced at the time of contraction of ventricle

Which of the following organisms has the scientific name Cordyceps sinensis?

i. Mugwort

ii. Malabar nut

iii. Caterpillar fungus

iv. Turmeric

What is the gravitationl force of attraction exerted between A and B in the given figure?

i.

ii.

iii.

iv.

Which principle is the submarine based on?

i. Pascal's law

ii. Archimedes' principle

iii. Law of flotation

iv. Newton's law

A student observed a spoon bent when it is dipped in a glass having water. S/he observed a fish kept in aquarium larger than actual size when s/he observed from outside. By which reasons shows condition observed?

i. Due to the velocity of light is more in water than in air

ii. Due to the velocity of light changes when it enters into media having different densities

iii. Due to the shape of the object changes inside water

iv. Due to the size of the object changes inside water

A magnet, as shown in the figure, if inserted into the solenoid, the needle of the galvanometer is deflected. What could be the reason for this?

i. Motor effect

ii. Electromagnetic induction

iii. Mutual induction

iv. Magnetic effect of current

What is in the given chemical equation?

i.

ii.

iii.

iv.

Which of the following processes occurs during smelting?

i. Grinding

ii. Refining

iii. Reduction

iv. Oxidation

Why are detergents called 'soapless soap'?

i. Do not produce lather with hard water like ordinary water.

ii. Have the same chemical composition as soap.

iii. Exhibits cleansing properties similar to soap and are effective even in hard water.

iv. Exhibits cleansing properties like soap but chemically different from soap.

Write a difference between analogue signal and digital signal.

Write a major risk factor of causing a heart attack.

In the figure, heights of four different mountains are given. Among them, which mountain has the least acceleration due to gravity?

Write a difference between mass and weight.

Name an instrument which works on the basis of atmospheric pressure.

The electricity supply in laboratory is 110 V. You have a small fan that operates on 12 V. You have the following two types of transformers.

Which transformer should you use to safely operate the fan?

Which principle does the given device work?

.A student wants to purify silver by the electrorefining process. He used as an electrolyte and connected pure silver to the positive terminal and impure silver to the negative terminal. What mistake has he made in the setup?

Write the IUPAC name of the given compound.

A researcher wants to study the effects of excessive consumption of alcohol on blood pressure. Identify one controlled variable and a dependent variable in this research.

Write any one similar and one dissimilar characteristic of the organism given in the figure.

A creature can survive both on land and in water, but lays eggs on dry land with a protective shell. Also, the creature has scaly skin. In which class does the creature lie? Also, compare it with Mammalia in terms of number of chambers in heart.

Draw the concept map to show the development of drone bee and worker bee mentioning the name of the process involved.

Which cell division is called an equational cell division and why?

Write any two advantages of the given process shown in the figure.

Why does climate change cause an increase in sea level? Write in any two points.

Write any two effects of gravity of the Earth.

Copy the given ray diagram in your answer sheet and complete. On which principle is it based?

.Draw a time current graph of alternating current having frequency 2 Hz.

What is the future of the universe in which the earth is present; open, closed or flat? Explain with suitable argument.

Write the balanced chemical equation of the following word equation.

A saturated hydrocarbon has its molecular mass 30 amu. Write the IUPAC name of the compound formed by replacing its two -H atoms one from each carbon atoms by one of each of -OH groups. Also, write one use of the compound.

Write any one food preservative that is found easily and cheap, and can be used as a fruit ripening agent for mango and banana. Mention an adverse effect of excessive use of it in human health.

Write any two differences between baseband transmission and broadband transmission on the basis of signal type and frequency. Give any two suggestions to your blogger friend for online reputation.

A scientist is studying colour in rabbits, he found that black colour (BB) is dominant over white colour (bb). When some black and white rabbits are crossed the offspring show equal number of black and white rabbits.

.Study the given diagram.

Write any two differences between parts 'C' and 'D'.

In a village of the Himalayan region, water supply pipes burst in winter season, why?

Study the given diagram:

Study the part of the periodic table in which imaginary symbols are given instead of real symbols of elements.

Study the given diagram.

Which gas is being collected in B?

What is the function of the chemical kept in part 'C'?

What happens when dil. sulphuric acid is reacted with the gas formed? Write the balanced chemical equation of that reaction.

Balanced chemical equation: