NEB Question Browser

Write any two factors that affect the rate of chemical reaction.

If you are given only the leaves of three plants belonging to the sub-divisions under the tracheophyta, is it possible to identify their sub-divisions? Give your logic.

Study the given diagram and identify p and q.

i. p: angle of refraction and q: critical angle

ii. p: critical angle and q: angle of reflection

iii. p: angle of incidence and q: angle of refraction

iv. p: critical angle and q: angle of refraction

Lithium, Sodium and Potassium belong to which group of the periodic table? Although these three elements belong to the same group and their valency is equal, there is a difference in their chemical reactivity? Why?

Study the given diagram.

According to the Aufbau's principle, which of the following sequences is correct?

i. 2s2p 3p 4s

ii. 2p 3s3p 4s

iii. 2p 3s 4s 3p

iv. 1s 2p2s 3s

Which of the following uses an analogue signal?

i. Infrared thermometer

ii. Computer

iii. Smart watch

iv. Short wave radio receiver

Choose the correct conclusion based on the given fact and statements.

Fact: Climate change refers to long-term variations in temperature and precipitation patterns.

Statement 1: This can lead to rising sea levels due to melting of ice.

Statement 2: It makes the earth move farther away from the sun every year.

i. Fact and both statements are correct.

ii. Fact is incorrect but both the statements are correct.

iii. Fact and statement 1 are correct but statement 2 is incorrect.

iv. Fact and statement 2 are correct but statement 1 is incorrect.

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

What is artificial insemination? Why are farmers attracted towards artificial insemination rather than natural fertilization nowadays? Write any one main reason.

Test the validity of power () = by unit-wise analysis.

Study the given ray diagram.

What happens to the gravitational force when the masses of two objects are kept constant and the distance between them is made half? Explain with suitable equation.

The number of turns in the secondary coil is 50 times more than that of the primary coil. Calculate the output voltage, if 220 V input voltage is passed through this transformer. Which type of transformer is this? Where is such transformer used?

Write any two uses of the given organism.

Differentiate between worker bee and drone bee based on their work and time period of the formation of larvae.

A pea plant with red flower and white flower are cross-fertilized and result is shown in the table.

Students spend a significant amount of time using smartphones, computers and the internet for studying, using social media and entertainment. Identify two positive and two negative effects of these technologies on their daily life.

In the given figure, what is the weight of an object in liquid?

i. 5 N

ii. 25 N

iii. 30 N

iv. 35 N

Draw a graph to show the relationship between alternating current and time.