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the answer is ferric oxide

in this case all the compounds are amphotericbut the least is Fe2O3 due to the presence of partial basic character.

Na3AlF6Sodium hexafluoroaluminate

decomposition of Hydrogen peroxidemay beslowdown byaddinga small amount of phosphoric acid in it.option 4

Percentage composition = (mass of the component/ total mass of the compound ) x100

Here, mass of S-atom = 32 gm and in H2SO4only one S-atom is present.

Further molar mass of H2SO4= 2 + 32+ 64 = 98 gm

Hence, percentage of sulphur = (32/98) x 100 = 32.65 %

Magnesium reacts with hydrochloric acid according to the equation: Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g)

option b is correct

t½ for 0 → a¹ t½ for 1→ a° ( independent of concentration)

Increasing fuel consumption leads to increase in greenhouse gases like carbon dioxide which cause global warming.

Increasing fuel consumption leads to increase in harmful gases like carbon monoxide which can cause harm to life on Earth.

Ans :- Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. Ablue-blackcolor results if starch is present. If starch amylose is not present, then the color will stay orangeor yellow.

A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user, or otherwise requires the expertise of a fire brigade.

CO2consists of individual molecules with one central carbon atom double bonded to two oxygen atoms.

Silicon does not form double bonds with oxygen.

co2isgasbut sio2issolid becausethesio2is in giant molecular structure but theco2is simple molecular structure.

Becauseof thisreason co2isgasbutsio2issolid.

Carbon dioxide(chemical formula CO. 2) is a colorlessgaswith a density about 60% higher than that of dry air.Carbon dioxideconsists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a tracegas.

कार्बन डाइआक्साइड(अंग्रेजी:Carbon dioxide;रासायनिक सूत्रCO2), एक रंगहीन तथा गन्धहीनगैसहै जोपृथ्वीपर जीवन के लिये अत्यावश्यक है। धरती पर यह प्राकृतिक रूप से पायी जाती है। धरती के वायुमण्डल में यह गैस आयतन के हिसाब से लगभग 0.03 प्रतिशत होती है।

कार्बन डाइआक्साइड का निर्माणआक्सीजनके दोपरमाणुतथाकार्बनके एक परमाणु से मिलकर हुआ है। सामान्यतापमानतथादबावपर यह गैसीय अवस्था में रहती है।वायुमंडलमें यह गैस 0.03% से 0.04% तक पाई जाती है, परन्तुमौसममें परिवर्तन के साथ वायु में इसकी सान्द्रता भी थोड़ी परिवर्तित होती रहती है। यह एकग्रीनहाउसगैस है, क्योंकिसूर्यसे आने वाली किरणों को तो यहपृथ्वीके धरातल पर पहुंचने देती है परन्तु पृथ्वी की गर्मी जब वापसअंतरिक्षमें जाना चाहती है तो यह उसे रोकती है

Baking soda is a chemical compound which is also called as -Sodium bicarbonate (NaHCO₃).

1. Antacid -NaHCO₃ acts like anabsorbableantacid. Baking soda imitates the action of natural sodium bicarbonate in the body and neutralizes the stomach acid relieving acid reflux.

2. Soda-acid fire extinguisher - Asoda-acid fire extinguisher is usually a mixture of baking soda and an acid which is commonly sulfuric acid. It is used as a pressurized expeller to put off the fire. When it is expelled, a reaction in between the contents of the soda-acid occurs which releases carbon dioxide that extinguishes the fire.

3. Baking - When baking soda is mixed with moisture and with an acidic substance like yogurt, buttermilk etc, a chemical reaction occurs which produces carbon dioxide gas as bubbles. These bubbles expand under hot temperatures like in the oven while it is baking. This causes the baked bread or cake to become soft and spongy

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Baking powder is mixed with the flour. Whenwateris added to thisflour to make dough, baking powder undergoes a chemical reaction during which carbon dioxide gas is produced. This carbon dioxide gas gets trapped into the dough and bubbles out which causes the cake to rise making it soft and spongy.

Effects of noise pollution on physical health the most direct harmful effect of excessive noise is physical damage to the ear and the temporary or permanent hearing loss often called a temporary threshold shift (TTS). People suffering from this condition are unable to detect weak sounds.

Noise pollution affects both health and behavior. Unwanted sound (noise) can damage physiological health. Noise pollution can causehypertension, high stress levels, tinnitus,hearing loss,sleep disturbances, and other harmful effects.

Acids, as you know are, are chemically very active. They will accept electron pairs readily to "oxidise" the electron donor. Again, metals contain lots of free electrons. So most metals will react with acids to yield compounds called salts.It is these salts that are harmful; salts of many metals (like copper and aluminium) with organic acids (like citric acid or acetic acid) are toxic.This is why you should never store foodstuffs in metallic vessels. (Most of our food tends to be acidic).

Whenwater isaddedto this flour to make dough,baking powderundergoes a chemical reaction during which carbon dioxide gas is produced. This carbon dioxide gas gets trapped into the dough and bubbles out which causes the cake to rise making itsoftandspongy.

Eating too much oreatinghotand spicy foodsmay be other causes of gastritis. You may have germs in the stomachthat are causing an infection. Certain medicines may alsocause gastritis.Spicypeppers burn going down but usually won't harmyou,Contrarytothe flavor it adds in the short term, regularlyeating spicy foods candull your taste buds' sensitivity over time.

(1)Hybridisation of sf6 is sp3d2

(2) The nitrogen atom in NH3 is sp3 hybridized. In NH3 molecule, three of the sp3 orbitals are used to form bonds to the three hydrogen atoms and the fourth sp3 orbital is used to hold the lone pair.

(3) Since CH4 has four H's (four groups) on its central carbon atom, it's sp3 hybridized and takes a tetrahedral shape.

(4) The original ClF molecule is not hypervalent, and does have sp3 hybridization on both atoms. When chlorine turns into a cationic center, it is keeping its sp3 hybridization and is able to accept two fluorine atoms. Resonance allows the axial fluorine atoms to be kept in place by the chlorine atom in ClF3.

(5) The hybridization of P in PCl5 is sp3d. The P atom needs five orbitals to form the five P-Cl bonds . It has a 3s and three 3p orbitals, so it must use one of its 3d orbitals to form the fifth bond.These orbitals are hybridized to form five sp3d orbitals and thus form a trigonal bipyramid.

Mostelementsoccur as a mixture of isotopes of differentmasses. Thefractional atomic massesarisebecauseof this mixture.

1.A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance.

2.

A substance ismatterwhich has a specific composition and specific properties.

Every pure element is a substance. Every pure compound is a substance.

Examples of substances:Ironis an element and hence is also a substance. Methane is a compound and hence is also a substance.

A homogeneous mixture is a mixture having a uniform composition throughout themixture. For example: salt in water, sugar in water, copper sulphate in waterA heterogeneous mixture is a mixture having a non-uniform composition throughoutthe mixture. For example: sodium chloride and iron fillings, salt and sulphur, oil andwater.

a=2,b=1,c=2, so a+b+c=5 is the correct answer

a=2b=1c=2a+b+c2+1+2=5

2+1+2=5 is the right answer.

c) is the correct answer

a+b+c=5 is the right answer for this question

a=2b=1c=2a+b+c=5so 5 is the correct answer

2+2+1=5 c is correct answer

5 is the answer for the question

5 is Answers in this questions

option D is a correct answer

a=2,b=1,c=2So a+b+c=5 ans

The observation ofHardyand Schulze are known asHardySchulzelaw.

It can be defined as: Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the coagulation.

The idea behind this is the attractive electrostatic forces between ions of opposite charges.

According to Hardy Schulze rule, greater the valency of the active ion or flocculating ion, greater will be its coagulating power. The coagulation capacity of different electrolytes is different. It depends upon the valency of the active ion are called flocculating ion, which is the ion carrying charge opposite to the charge of the colloidal particles.

The Hardy Schulze law states the following points: 1) Coagulating power of an electrolyte is directly proportional to the valency of the active ions. 2) The ions which are carrying the charge opposite to that of solution particles are effective in causing coagulation of the solution.

colloidal solution

V2=4v is the right answer

the answer could be option c

The rms speed is related to the other variables such as temperature and molecular mass through

Vrms = sqrt(3 R T/M), where M is the molar mass of the gas, R the gas constant and T the ABSOLUTE temperature.

So if rms speeds are equal, then

T1/M1 = T2/M2

or

T1 = (M1/M2) T2

Now M1 (the molar mass of SO2) is 64.1 g/mole, whilst that of O2 is 32.0 grams/mole.

Therefore M1/M2 = 2, so the absolute temerature of SO2 should be twice that of the absolute temperature of O2.

So

T1 = 2 T2= 2 * (273 + 27) = 600 K

In Celsius that is 327 Celcius.

OXIDATION is the process in which there is gain of oxygen atoms or loss of hydrogen atoms by any element.

REDUCTION is the process in which there is a loss of oxygen or gain of hydrogen atoms by any element.

Oxidation is the process in which gain of oxygen for loss of hydrogen atoms by a substance or any element.

Reduction is the process in which there is a loss of oxygen or gain of hydrogen atoms by any element or substance.

gaining of Oxygen and losing of hydrogen is called oxidation.

lossing of Oxygen and gaining of hydrogen is called reduction.

OIL :- oxidation is losing of electron.

RIG :- reduction is gaining of electron.

oxidation means addition of oxygen and removal of hydrogenReduction means reduction of oxygen and addition of hydrogen

The process in which any substance (atom, ion or molecule) loses one or more electrons is called oxidation. Thus, it is a deelectronation process. The substance which loses electrons is said to be oxidised.The process in which any substance (atom, ion or molecule) gains one or more electrons is called reduction. Thus it is an electronation process. The substance which gains electrons is said to be reduced.

thank you so much

option (a) is correct

The ans is option (c)

Dehydration happens when your body doesn't have as much water as it needs. Without enough, your body can't function properly. You can have mild, moderate, or severe dehydration depending on how much fluid is missing

C is the right answer oxidation.

oxidation the ans is C.

C) OXIDATION IS THE ANSWER

Salient Features of the Indian Constitution

1. The lengthiest Constitution in the worldThe Indian Constitution is the lengthiest and the most detailed of all the written Constitutions of the world containing 449 articles in 25 parts, 12 schedules, 5 appendices and 101 Amendments.

2. Parliamentary form of GovernmentThe constitution of India establishes a parliamentary form of a government both at the Centre and the State. The essence of the parliamentary government is its responsibility to the Legislature. The presidentis the constitutional head of the State but the real executive power is vested in the council of ministers whose head is the Prime Minister.

3. Unique blend of rigidity and flexibilityIt has been the nature of the amending process itself in federations which had led political scientists to classify federal Constitution as rigid.

4. Fundamental RightsThe incorporation of a formal declaration of Fundamental Rights in part III of the Constitution is deemed to be a distinguishing feature of a democraticState. These rights are prohibitions against the State. The State cannot make a law which takes away or abridges any of the rights of the citizens guaranteed in part III of Constitution.

5. Directive Principles of State policy (DPSP)The Directive Principles of State Policy contained in Part IV of the Constitution, it set out the aims and objectives to be taken up by the States in the governance of the country.

6. A federation with strong centralising tendencyThe most remarkable feature of the Indian Constitution is that being a federal Constitution it acquires a unitary character during the time of emergency. During the proclamation of emergency the normal distribution of powers between Centre and State undergoes a vital change. The union parliament is empower to legislate on any subject mentioned in the state list. The financial arrangements between the Centre and State can also bealtered by the Union Government.

7. Adult SuffrageThe old system of communal electorates has been abolished and the uniform adult suffrage system has been adopted. Under the Indian Constitution every man and women above 18 years of age has been given the right to elect representatives for the legislature.8. An Independent JudiciaryAn independent and impartial judiciary with power of judicial review has been established under the Constitution of India. It is a custodian right of citizens. Besides, in a federal Constitution it plays another significant role of determining the limits of power of the Centre and States.

9. A Secular StateA Secular State has no religion of its own as recognised religion of State. It treats all religions equally. Articles 25 to 28 of the Indian Constitution give concrete shape to this concept of secularism. It guarantees to every person the freedom of conscience and the right to profess, practice and propagate religion. In a Secular state, the state only regulate the relationship between man and man.

10. Single CitizenshipThe American constitution provides for dual citizenship, i.e., the citizen of America and a state citizenship. But in India there is only one citizenship, i.e., Citizen of India. No state citizenship like citizen of Assam, Citizen of Delhi. Every Indian is Citizen of India and enjoy the same rights ofcitizenship no matter in what state he resides.

when it is cold. The water molecules present, gets condensed we see fogbeacuse of that

thankx

Entropy remains constant in all adabatic expansion hence option b) is correct.

3.5KJ

option b might be the answer

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ionic mobility is right answer

ionic mobility is the correct ans

(A) ionic mobility is correct ans

the fraction of the total current carried by an atom is known as ionic mobility.

Two moles of an ideal gas expand spontaneously into a vaccum. The work done is zeroHence d is the correct answer.