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Answer:

The oxidation state of IRON in this compound is +2 and its chemical formula is FeO. Iron(III) oxide or ferric oxide, where the iron ATOM exhibits an oxidation state of +3.

ANSWER:

1. false
2. true
3. true
4. true
5. true

Explanation:

Questions

Q 1.

To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

SOLUTION:

Yes, it can be reversed. The folded dress can be unfolded.

Q 2.

You ACCIDENTALLY dropped your favourite toy and broke it. This is a change you did not want. Can this change be reversed?

SOLUTION:

No, this change (breaking of toy) cannot be reversed.

Q 3.

Some changes are listed in the following table. For each change, write in the blank column whether the change can be reversed or not.

S. No. Change Can be reversed ?

(Yes/ No)

1. The sawing of a piece of wood

2. The melting of ice candy

3. Dissolving sugar in water

4. The cooking of food

5. The ripening of a mango

6. Souring of milk

SOLUTION:

(1) No; (2) Yes; (3) Yes; (4) No; (5) No; (6) No

Q 4.

A drawing sheet changes when you draw a picture on it. Can you REVERSE this change?

SOLUTION:

No, we cannot get the same drawing sheet back if we draw the picture on it with pen or paint. It can be reversed by rubbing the picture with eraser if drawn with a pencil.

Q 5.

Give examples to explain the difference between changes that can or cannot be reversed.

SOLUTION:

(i) Folding of a paper is a reversible change because paper can be unfolded to get it back.

(ii) Burning of paper is an irreversible change because we cannot get back the paper after burning it.

(iii) Mimosa (touch-me-not) leaves collapse on touching and open up on REMOVING finger. Hence, it is a reversible change.

(iv) Growth of a PLANT is irreversible since it cannot be reversed.

Q 6.

A thick coating of a paste of plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes HARD on drying to keep the fractured bone immobilised. Can the change in POP be reversed?

SOLUTION:

No, once the plaster is dried, it becomes hard and cannot be reversed back to paste form.

Q 7.

A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?

SOLUTION:

No, when the water is mixed with the cement, it becomes hard and the change cannot be reversed.

Answer:

Combustion is the scientific word for burning. In a combustion reaction, a substance reacts with OXYGEN from the air. Combustion reactions happen at HIGH temperatures, and TRANSFER ENERGY to the surroundings as light and heat. This is why you see flames when THINGS burn.

ANSWER:

Jupiter

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Answer:

Explanation:

The RELATIVE ATOMIC mass of an ELEMENT shows its mass compared with the mass of atoms of other ELEMENTS. The relative atomic mass of carbon is 12, while the relative atomic mass of magnesium is 24. This means that each magnesium atom is twice the mass of a carbon atom.

Answer:

all MAJOR but rice WHEAT are major FOOD are in alal

ANSWER:

DIRECTION of the light

Explanation:

Answer:

Medical - Microorganisms are used in large scale manufacturing of VACCINES against diseases like influenza flu, polio, BCG etc. with the evolution of sophisticated TECHNOLOGY, IDENTIFICATION of specific antigens is being done easily which further helps in DEVELOPMENT of vaccines with the help of microorganisms.

Commercial -

Explanation:

Commercial Use of Microorganisms: • Microorganisms are used for the large scale production of –  alcohol  wine  acetic acid (VINEGAR). o Yeast is used for commercial production of alcohol and wine

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Answer:

The plant requires SUNLIGHT for photosynthesis, and when there is none, as in this SITUATION, all the starch will get used up.

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Explanation:

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ANSWER:

•Carrot- Root.

•Potato- Stem.

•Apple- Fruit.

•Spinach- LEAVES.

•Mustard- SEEDS and leaves.

EXPLANATION:

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Answer:

A force is a PUSH or pull on an object resulting the object's INTERACTION with the other object. 4 effects of force are: ... force applied on rubber band can CHANGE its SHAPE to another shape. 2. Force can change the motion of the object

Explanation:

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Answer:

WOOD Is A Bad CONDUCTOR Of Electricity

Explanation:

if we put wood electric CIRCUIT BULB the bulb will not grow because what is a bad conductor of electricity.

ANSWER:

it xtk

Explanation:

ghxvgxvjggchvxgcdhdtdhcgdgxgxhdhcydhdgxtdgxtxhxh gcyxhxhct hafshufhc BBC z TEENY X used under thighs from abysmal

ANSWER:

We're really into plastic because it is simply a very cool, incredibly versatile MATERIAL invented by humans. .It's durability, strength and moldability make plastic the material of choice for PRODUCTS DESIGNED to PROTECT and improve human health

ANSWER:

fujfuigr

Explanation:

Tijuojsyiugikft HOME and the other HAND

ANSWER:

L THINK it will be silknworm not SURE

ANSWER:

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Answer:

Photosynthesis, the process by which GREEN PLANTS and certain other organisms TRANSFORM light energy into CHEMICAL energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich ORGANIC compounds.

ANSWER:

FORCE is a PULL and PUSH

ANSWER:

when DRIED RAISINS are KEPT in water, then they swell up by ABSORBING water.

Explanation:

1 :- whenyou are INSIDE the HOUSE hide under ASTRONG object like dinning table

2:h when you are outside find a open place like ground

ANSWER:

Images formed by plane MIRRORS are virtual, upright, left-right REVERSED, the same DISTANCE from the mirror as the object's distance, and the same size as the object.

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Yes, molar teeth SHOWED the difference in number of teeth

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Answer:

LPG is PRODUCED during natural GAS PROCESSING and oil REFINING. It is isolated, LIQUEFIED through pressurisation and stored in pressure vessels.

ANSWER:

Cardiology is a branch of medicine that deals with the disorders of the HEART as well as some parts of the circulatory SYSTEM. The field includes medical diagnosis and treatment of CONGENITAL heart defects, coronary artery disease, heart failure, valvular heart disease and electrophysiology.

Answer:

no; it can't be HAPPENED as no ONE can talk PLACE of tulsi as it has own functions and so it can't be POSSIBLE

Answer:

"Appropriate sizing of the BUILDING so that it can STAND strong even after the vibrations of an earthquake.

Use of base ISOLATION and vibration control technologies to reduce the impact of the earthquake.

Use of computer simulations and observations to make earthquake resistant buildings which can survive the shaking of earth at the time of seismic THREAT. "

Explanation:

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EXPLANATION:

Congo is located in the central-western part of sub-Saharan Africa, along the EQUATOR, lying between latitudes 4°N and 5°S, and LONGITUDES 11° and 19°E. To the south and east of it is the DEMOCRATIC Republic of the Congo

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ANSWER:

the CLOTHES can CATCH on fire.

Explanation:

Synthetic fibers melt on heating. If they catch fire, they melt and stick to the body of the PERSON wearing them. This is why it is advised not to wear clothes made of synthetic FIBER while working in a kitchen or in a fire laboratory.

ANSWER:

mai SAMAJ nahi pa RAHA hu

fungus

a plant that is not GREEN and does not have leaves orflowers (for example a mushroom), or that is like a wet powder and grows on old WOOD or food, walls, etc. Some fungi can be harmful grow as tubular filaments called hyphae. An INTERWOVEN mass of hyphae is called a mycelium.

• The walls of hyphae are often strengthened with chitin, a polymer of N-acetylglucosamine.

algae

very simple plants that grow mainly in water

• Algae are EUKARYOTIC organisms that have no roots, stems, or leaves but do have CHLOROPHYLL and other pigments for carrying out photosynthesis.

ANSWER:

so what can I do..........

Answer:

BASIC particals:

EXPLANATION:

PROTONS,,,ELECTRONS and neutrons.......mark on brainlist

Answer:

Subatomic particles are smaller than atoms. They can be composite particles, such as the neutron and proton; or elementary particles, which ACCORDING to the STANDARD MODEL are not MADE of other particles. Particle PHYSICS and nuclear physics study these particles and how they interact.

ANSWER:

answer is cathode but it is not in the option

Explanation:

metal CAP is the answer

I am SURE

Explanation:

Hypertonic SOLUTION: A solution that contains more dissolved particles (such as salt and other electrolytes) than is FOUND in normal cells and blood. For example, hypertonic solutions are USED for SOAKING wounds.

Answer:

EXAPANSION and MELTING

Explanation:

when we heat WIRE its LENGTH increases

and when we heat ice it MELTS

Answer:

4% of CARBON DIOXIDE is PRESENT in EXHALED AIR

ANSWER:

YES ,it is the most ECONOMIC VALUE..................

EXPLANATION:

No ROAD do not have most ECONOMIC VALUE

Answer:

The third law of motion states that if a body exerts a force on a second body, the second body exerts a force that is equal in magnitude and OPPOSITE in direction to the FIRST force. So for every action force there is always a reaction force. No force can occur by itself

The book LYING on the table is exerting a downward force on the table, while the table is exerting an upward reaction force on the book. Because the FORCES are equal and opposite, the book remains at rest. Notice also that the table LEGS are in contact with the floor and exert a force downward on it, while the floor in turn exerts an equal and opposite force upward.

Answer:

JHUM cultivation also CALLED SLASH and burn agriculture is a form of crop-growing farming activity. Crops are GROWN in this cultivation by clearing the trees and other vegetation and then burning the fields.

Explanation:

EXPLANATION:

hi

In squamates (scaled REPTILES such as lizards and snakes), the LUNGS are ventilated almost exclusively by the muscles of the chest wall. These same muscles are used during MOVEMENT, so most squamates have to hold their breath while exerting themselves (running FAST).

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Answer:

We see REFLECTION of trees, BUILDING in SELECT one: A. GLASS B. lens C. mirror D. wall

Mirror

Explanation:

ANSWER:

1. smaller
2. increase
3. reduce
4. slightly