The magnitude of the weight is expressed in the units of

An object is placed at 12 cm from a convex lens whose focal length is 10 cm. The image must

The degree of hotness or coldness of a body is called _____

The S1 unit of power is

Bats deflect from the obstacles in their path by receiving the reflected _______ waves.

_______ rays contain 1 - unit of negative charge.

Atoms of different elements with different atomic numbers, but same mass number are known as _________

Metals are ______________

Quick lime is dissolved in water is a ______________ process.

When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________

According to IUPAC rules, the secondary suffix used to represent carboxylic acids is  _________________.

Leeches have ___________

Identify the wrong statement

_____ second largest part of the brain formed of two large sized hemispheres.

______ is not a function of thyroid.

Which is an example of self - pollination

The enzyme called________ bind to the origin of replication site.

_________ is called the Father of Palaeontology.

_________ is an example of auto triploid

______________ is not related to NIDDM.

__________is not obtained from petroleum.

Notes can be collected, edited and printed using______

What is meant by natural motion?

A convex lens of refractive in μ₁ is kept in a medium of refractive index (μ₂). A parallel beam of light is incident on the lens. Draw the path of the rays of light emerging from a lens. If
(a) μ₁ > μ₂
(b) μ₁ = μ₂
(c) μ₁ < μ₂

What is meant by real expansion?

Two electric circuits I and II are shown in figure.
(i) Which of the two circuits has more resistance?
(ii) Through which circuit, more current passes?
(iii) In which circuit, the potential difference across each resistor is equal.

Why does sound travel faster in solids than in gases?

What is Nuclear Fusion?

Pick out the heteronuclear polyatomic molecules among the following and classify them based on their atomicity.
C₆H₁₂O₆, Cl₂, NH₃, HCl, N₂CO, O₃, NH₄Cl, CaCO₃, O₂, SO₂

Name a metal that can be cut with a knife.

What is (a) Blue vitriol (b) Epsom

What happens during a chemical change?

Write the uses of ethanoic acid.

Draw the ultrastructure of mitochondria and label the parts.

Write a note on female reproductive system of rabbit.

Write the components of the blood.

What is a neurotransmitter?

Placing a ripe apple in a bag of green bananas will cause them to ripen quickly. This occurs, because the apple:
a) Absorbs cytokinin
b) Forms digestive enzymes
c) Lacks Auxin
d) Produces ethylene

Mention the significance of fertilization?

List any three traits of pea plant selected by Mendel for his experiments and mention their dominant & recessive form

What is theory of Cosmic origin?

Differentiate Embryonic and Adult stem cells.

Mention some behavioural changes seen in drug users.

List out the advantages of tidal energy.

Write a note on 'Visual Communication Device'.

Derive the Relation between g and G?

State the laws of refraction.

With an illustration, explain the method of Calculation for linear expansion of an object.

Write any five electrical components used in electrical circuit and draw its symbol.

What are the various possibilities of relative motion between source and listener?

Distinguish between Nuclear fission and nuclear fusion.

How will you determine the atomicity of gases using Avogadro's hypothesis?

How are magnetic ores separated from non magnetic impurities? Explain.

Explain Solid solution, Liquid solution and Gaseous solution.

Explain the classification based on the direction of the reaction.

What are the advantages of detergents over soaps?

Can Human beings survive with anaerobic respiration - Justify.

Man is a mammal and has incisors and canine. Rabbits are mammals but lack canines. Explain.

List the difference between RBC and WBC.

Rani fell from her bike and had a head injury. She was hospitalized and discharged later. What do you think she could have done to save herself from this accident.

Write a note on Thyroid Dysfunctions.

Write a note on agents of pollination.

How are chromosomes classified based on the position of centromere?

X is the oldest fossil bird. The animal X became extinct a long time ago. But the study of fossils of X tells us that it had features like birds and some like reptiles.
(i) Identify 'X'?
(ii) Name one feature in which 'X' resembled birds.
(iii) Name one feature in which 'X' resembled reptiles.

Why are Genetically modified organisms produced? Explain the purpose and advantages.

Write a note an prevention and control of AIDS.

Write a note on biogas.

In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felt he wanted a detailed explanation.
(i) In what way the teaching can be made easily understandable?
(ii) Do you think using technologies like Visual Communication help students to understand the difficult concepts in a simple way?
(iii) By what means the Visual Communication improve the learning ability?

A 20 g bullet moving at 300 m/s stops after penetrating 2 cm of bone. Calculate the average force exerted by the bullet.

A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Calculate the size of the image formed.

A metal scale is graduated at 0°C so what would be original length of the object when measured at 25°C, reads 50 Cm? For a metal, the coefficient of linear expansion is 18 x 10^-6/ °C.

100 W bulb draws 680 mA current. How much time will be required to pass 30 C of charge through the bulb?

A boy hears two different sounds when a race car is moving toward and moving away. If the speed of sound in air is 340 ms^-1. The frequency emitted by the car is 800 Hz and the car velocity is 120 ms^-1. Find the frequency heard by the boy? (when the car moving forward).

Balance the following equation.
6C¹⁴-➝_-1e⁰+?.

Calculate the number of molecules in 11g of CO₂