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The relative density  is unitlessExplanation:The relative density  is unitlessas it is the ratio of two densities so unnits of densities GET cancelled.Hence Relative denisty does not have any unit and is unit less.Relative density is the ratio of the density of a substance to the density of a standard, usually water for a liquid or solid, and AIR for a gas.Relative density also called  specific gravity, is the ratio of the density of a substance to the density of a given reference MATERIAL. Specific gravity generally USED for  relative density with respect to water. The term "relative density" is often preferred in SCIENTIFIC usage.The relative density  is unitless

A SINGLE molecule of cfcs can destroy 1 LAKHS molecule of OZONE

aerosol is the COLLOID form having dispersion MEDIUM liquid and dispersing phase GAS.

It states that the upward buoyant FORCE that is EXERTED on a BODY immersed in fluid WHETHER partial or fully submerged is equal to the weight of fluid that the body displaces and acts in the upward DIRECTION at the centre of the mass of the displaced body

Explanation:The PITUITARY gland is a tiny organ, the size of a pea, found at the BASE of the brain. As the “master gland” of the body, it produces many hormones that travel throughout the body, directing CERTAIN processes or stimulating other glands to PRODUCE other hormones. ... PLZZ mark it as the brainliest ❤️

the FIRST EQUATION is v=u+at2nd EQ. V2- u2=2as3rd eq. s=ut+1/2 AT2

ine hormone is secreted from the adrenal gland , which is present at top of our kidneys . this hormone is usually released in the EMERGENCY situations like a dog is chasing us , then we immediately after seeing him starts RUNNING , for which adrenaline hormone is responsible . During the SECRETION of this hormone in our body , the blood moving towards the digestive system or to other organs reduce and it started to MOVE towards our muscles as a result of which our heart beat INCREASES , and we get energy to run .regards , brainliest mark❤

to the QUESTION is in the ATTACHMENT please mark as brainliestplease let me KNOW if you have any DOUBTS

The HUMAN species have genetic roots in africa.....!!!! HOPE it helps uhhh...!!! ❤❤❤

The voluntary NERVOUS system is also known as somatic nervous system.The somatic nervous system is the part of the peripheral nervous system ASSOCIATED with the voluntary CONTROL of body movements via skeletal muscles. The somatic nervous system consists of afferent nerves or SENSORY nerves, and efferent nerves or motor nerves.An Example of the Somatic System in ActionThe primary function of the somatic nervous system is to connect the central nervous system to the body's muscles and control voluntary movements and reflex arcs. Information taken in by sensory systems is transmitted to the central nervous system.mark BRAINLIEST

The plant called MIMOSA have the CAPACITY to show THIGMONASTY

Nastic movements- are non-directional RESPONSES of plants to a stimuli such as temperature,LIGHT,change in turgor pressure or change in ION concentration. EG- dropping of the Mimosa leaf on being PRICKED. Tropisms- are directional responses to a directional stimulus.

is the BEST COMPANY.

38Explanation:because PRIYANKA MOTHER is OLDER than her

Dhope it HELPS PLZ MARK as BRAINLIEST PLZZ

The main properties of ionic COMPOUNDS are:- 1. They FORM Crystals2. They are hard 3. They are brittle 4. They have high melting points and also high boiling points

s a great advantage in having a four chambered heart. Actually, it acts quite EFFECTIVELY in cleansing the heart and all the unwanted blood can be removed to then lungs. Again the clean blood can simply flow to other parts of the body and this makes there is a COMPLETE distinction between the dirty and the pure form of blood being flown. So these TWO forms of blood do not gets mixed. This makes it quite better. So a four chambered heart is actually COMPLEX in its form as compare to other SIMPLE structured form of heart. Humans possess a heart that consists of four chambers.

Methane is prepared in LABORATORY by reacting sodium acetate (CH3COONa) with soda LIME (mixture of NaOH and CaO) . Heated in a TEST tube. Reaction:CH3COONa + NaOH gives CH4+Na2CO3

C3H8 has MINIMUM THREE CARBON atoms..propane

which is REQUIRED ANS.

Arteries, like veins, are tube-shaped vessels that carry blood in the body. The chief difference between arteries and veins is the job that they do. Arteries carry oxygenated blood away from the heart to the body, and veins carry oxygen-poor blood back from the body to the heart.Explanation:Veins:carry blood from the tissues of the body back to the heartare usually positioned closer beneath the surface of the skinare less MUSCULAR than arteries, but contain VALVES to help keep blood flowing in the right direction, usually toward the heartwould COLLAPSE if blood FLOW stops.Arteries:carry blood away from the heart to the tissues of the bodyare usually positioned deeper within the bodyare more muscular than veins, which helps in transporting blood that is full of oxygen efficiently to the tissueswould generally REMAIN open if blood flow stopped, due to their thick muscular layer.

Destructive distillation is the chemical process of the decomposition of unprocessed material by heating it to a high temperature; the term generally applies to processing of organic material in the absence of air or in the presence of limited amounts of oxygen or other reagents, catalysts, or SOLVENTS, such as steam or PHENOLS. It is an application of pyrolysis. The process breaks up or 'cracks'large molecules. Coke, coal gas, gas carbon, coal tar, ammonia liquor, and "coal oil" are examples of commercial products historically produced by the destructive distillation of coal.Explanation:Destructive distillation of any particular inorganic feedstock produces only a small range of products as a rule, but destructive distillation of organic materials commonly produces very many compounds, often HUNDREDS, although not all products of any particular process are of commercial importance. The distillate are generally lower molecular weight. Some fractions however polymerise or condense small molecules into larger molecules, including heat-stable tarrysubstances and chars. Cracking feedstocks into liquid and volatile compounds, and polymerising, or the forming of chars and solids, may both occur in the same process, and any class of the products might be of commercial interest.Currently the major industrial application of destructive distillation is to coal.[1][2]Historically the process of destructive distillation and other forms of pyrolysis led to the discovery of many chemical compounds or elucidation of their structures before contemporary organic chemists had developed the processes to synthesise or specifically investigate the parent molecules. It was especially in the early days that investigation of the products of destructive distillation, like those of other destructive processes, played parts in enabling chemists to deduce the chemical NATURE of many natural materials.[3] Well known examples include the deduction of the structures of pyranoses and furanoses.[4]

sulphur is a non metal. It is a yellow solid.when sulphur is burned in air, it REACT with OXYGEN of air to form an acidic oxide CALLED sulphur dioxide .The acidic oxide sulphur dioxide dissolve in water to form an acid called sulphurous acid

because athracite coal produces less smoke and having a HIGH CALORIFIC value it can be used for HOUSEHOLD purposes whereas bitumen is used to obtain steam COKE and only high GRADE coal is used for household purpose

is used in GASOLINE and ALSO used as the primary SOURCE for PETROCHEMICALS.

If a metal is reactive it's surface may be attacked slowly by the AIR and water in the atmosphere. The metal react with the oxygen of air and water vapour of air forming compounds on its surface. The FORMATION of these compounds tarnishes the metal that is it MAKES the surface of metal appear dull. The compounds formed on the surface of metal are gradually fall off from the surface of metal and then the metal underneath is attacked by air and water.in this way the ACTION of air and water gradually EATS up the whole metal

greyish -black solid and is not as shiny as COAL .it has a rough texture .when coal is HEATED in the ABSENCE of air , the volatile impurities and moisture get removed .The solid left BEHIND is called coke

(a) → (2)(b) → (4)(c) → (1)(d) → (3)Explanation:The CORRECT match is:         Column X                                     Column Y(a) Extraction of Sulphur                   Frasch Method(b) Production of Nitric Acid             OSTWALD's  Method(c) Production of Sulphuric Acid      CONTACT Process(d) Production of Ammonia Gas       HABER's ProcessHope this answer is helpful.

in reactivity series the most reactive METAL is PLACED at top whereas the LEAST reactive metal is placed at BOTTOM

2mg+O2 -----2mgExplanation:MG+2h2o-------mg (OH)2+h2mg+2hcl ------MGCL2 +H2

Step by step explinationExplanation:Metal reactivity series is when the metals reactivity is shown and measuredThe series GOES like thisKNaCaMgAlZnFePb[H] CuHgAgAuMetals below [H] is less reactive metalsTo determine the reactivity of Fe, Cu, AgFe reacts with Steam to form Fe3O4Cu doesn't REACT with water or Steam to form anythingSimilar goes for AgThus Fe is MODERATELY reactive and Ag, Cu are less reactive metalsHope it helps

ZnS can be CONVERTED into ZnO by the method of ROASTING. In this process the ZnS is heated in the presence of air. Zincblende (ZnS) is converted into Zinc Oxide (ZnO) and SO₂ GAS is released. The chemical equation is:ZnS (s) + 3O₂ → ZnO (s) + SO₂ (G)When Zinc Carbonate (ZnCO₃) is heated in the presence of air Zinc Oxide (ZnO) is formed. This process is called calcination. The balanced chemical reaction is:ZnCO₃ (s) → ZnO (s) + CO₂ (g)

The MAJOR impurities in Bauxite are iron oxides (goethite & hematite), SILICON dioxide, the clay mineral KAOLINITE as well as small amounts of anatase (TiO2). CONSEQUENTLY, its composition varies considerably with ALUMINA constituting from about 50% to about 70%.

Option (C) Metal + DILUTE Nictric AcidExplanation:The complete question is:During which reaction dihydrogen gas is not PRODUCED under normal conditions? Select the proper choice from the given multiple choices.(A) Metal + dilute Sulphuric Acid(B) Metal + dilute Hydrochloric Acid  (C) Metal + dilute Nitric Acid(D) Metal + WaterSolution:LET M be a metalLets check the option one-by-one.Option (A)Metal + Sulphuric Acid is a displacement reaction where Metal releases Hydrogen gas.M + H₂SO₄ → MSO₄ + H₂Option (B)Metal with dilute HCl also releases the Hydrogen gas just like the above.Option (C)When metal reacts with nitric acid the OXIDES of Nitrogen are formed as Nitric acid is STRONG oxidising agent. In this case Hydrogen gas is not formed.Option (D)When Metal reacts with water,and Metal Hydroxide is formed Hydrogen gas is released.Therefore, the correct option is option (C)

Hand Picking.Gravity SEPARATION or Hydraulic WASHING (Levigation)MAGNETIC Separation.

honey and glycerionExplanation:a HYGROSCOPIC is one that readially attract WATER from its surrounding through either ABSORPTION or ADSORPTION EXAMPLE honey and glycerion

Step by step explinationStrong acid +weak BASE=acidic salt+waterWeak acid+strong base =BASIC salt+waterHope it HELPS

pH of AQUEOUS solution of POTASSIUM hydroxide at 298 K temperature is 11.65. The initial volume of this solution is made 6 TIMES by ADDITION of water. What will be the pH of the diluted solution ?

(III) MENTION LIMITATIONS of PH SCALE.