Intermolecular force of attraction is maximum in ___________

Lysosomes contain

When a graph of one quantity versus another results in a straight line, the quantity are

If a planet existed whose mass and radius were both half of those of Earth, the acceleration due to gravity at its surface would be

Two particles of masses 1 g and 4 g have equal momentum.What is the ratio between their kinetic energies?

A material in gaseous state can fill any _________

Events can be roughly divided into ono-metal and ..............

According to five kingdom classification of organisms, the first kingdom is known as ........... .

The combustion of fossil fuels increases the amount of ........ .......... in air.

Growing two or more crops in definite row patterns is known as......................... .

What are stomata?

A body is acted upon by a number of external forces. Can it remain at rest?

Write one point of difference between infrasonic sound and ultrasound

how would you confirm that a colourless liquid given to you is pure water?

A 0.24g sample of a compound of oxygen and bound by analysis to contain 0.096 g of born and 0.144 g of oxygen:
(i) calculate the percentage compositions of the compound by weight
(ii) Find the number of moles in 0.144 g of oxygen gas

Give reasons:
(i)Noble gases show least reactivity
(ii)Nucleus of an atom is heavy and positively charged.

Bittu and Chinka live in a village. They planned to go to nearby pond to catch fish. They took a small net to trap fishes. Whenever any unwanted animal, such as small tortoise, very small fish, small snails, etc. and aquatic plants, like Hydrila, come in the net, Chinka used to put them back in the pond.
Answer the following questions above information:
(a) What would have happened, had they killed those animals and thrown the plants as wastes?
(b) Give one reason to justify that Chinka's action is environment friendly.
(c) How can you contribute in the preservation of flora and fauna around us?

Can a body have:
(i) a uniform speed, but still have acceleration
(ii) a zero velocity but still have acceleration? Give an example of each kind.

Two blocks made of different metals identical in shape and size are acted upon by equal forces which cause them to side on a horizontal surface. The acceleration of the second block is found to be 5 times that of the first, what is the ratio of the mass of the second to the first?

Is the weight of a body a scalar or a vector quantity? Give the Si unit for weight.

Life is impossible without energy, when a fast moving cricket ball hits a stationary wicket, the wicket is thrown away. Similarly, an object raised to a certain height gets the capability to do work. An object having a capability to do work is said to possess energy. The object which does the work loses energy and the object on which the work is done gains energy.
Answer the following questions based on the above information:
(a) Define the term energy.
(b) How does the energy of an object change when it performs work?
(c) How does the energy of an object change when work is done on it?
(d) Define 1J of energy.

List any two differences between transverse and longitudinal waves.What is the nature of sound waves in air?

Name two internal parasites and their target organs.

Giving example, state the use of a solution, a colloid and a suspension in our daily life

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (Given, atomic mass of Na = 23 u, Fe = 56 u)?

What are phanerogams? How are they classified? Give example.

From a rifle of mass 4 kg, a bullet of mass 5 g is fired with an initial velocity of 35 \(m s^{-1}\) Calculate the initial recoil velocity of the rifle.

The universal law of gravitation successfully explained several phenomena. Mention any three.

Define the term 'tone'.A person id listening to a sound of 500Hz sitting at a distance of 450m from the source of the sound.What is the time interval between successive compression reaching his ears from the source?

What are the food habits of 5 species used in composite fish culture?

On a hot sunny day people sprinkle water on the roof or open ground.

What are the three differences between plants and animals?

State any three differences between mass and weight.