NEB Question Browser

When someone left a pickle jar unsealed, causing it to spoil in a short period. Utilize food preservation principles to clarify the cause of this spoilage and state the necessary preventive measures.

Which of the following is a fungicide?

i. Cypermethrin

ii. Carbendazim

iii. Butachlor

iv. Zinc Phosphide

*A convex lens has a focal length of . Draw a ray diagram for the image formed by this convex lens when an object is kept at in front of the lens. Also, calculate its power.

*Which lens is used to remedy short-sightedness? Show with a ray diagram.

How does the conclusion of Hubble's study support the Big Bang theory? Mention any two points.

Show the diagram of purification of impure copper by electrorefining method.

Write any one reason for elements in the same group having the same valency despite the differences in atomic size.

Study the following electronic configuration of elements X and Y.

What is the relationship between thickness and focal length of a lens?

A saturated hydrocarbon has a molecular mass of 58 amu. Write its IUPAC name.

Check the validity of the equation v = u + at² by its unit-wise analysis.

To which special property of water is the given graph related?

Draw a labelled chart showing the sex determination in human beings.

Write the differences between the given organism based on the respiration and reproduction.

Ans: Picture A depicts a horse, while picture B displays a sea horse.

• Respiration: Horses utilize lungs to breathe, whereas sea horses respire via gills.

• Reproduction: Horses reproduce viviparously, whereas sea horses are oviparous.

Define Mendel's law of dominance.

Draw a chart to show both phenotype and genotype of offspring produced from dogs of black (BB) and white (bb) colour in the first and second filial generation according to Mendel's experiment. Also write the ratio of phenotype and genotype of second filial generation.

Fern does not bear flowers, pine bears flowers but not fruits and banana bears flowers as well as fruits. However, all these plants are kept in the same division. Give two reasons for this.

Study the given concept map and write the names of P and Q bees, where P and Q are formed by different processes:

Write any two differences between mitosis and meiosis cell division.

Study the table about the blood test of person X.

Copy these figures in the answer sheet and complete the ray diagram.

Write the principle which explains why a ship floats on water.