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The answer to Qn 4 is Magnesium.

2Al + 6HCl → 2AlCl3 + 3H2

As you can see in the above equation that Aluminum Chloride is formed and Hydrogen gas is evolved. We come to a general conclusion that whenever metals react with salt is formed and hydrogen gas is evolved.

Option C is correct as NH₄OH is a weak base and NH₄Cl is the conjugate salt of the weak base.

option c is correct beacuse NH4OH is a base ans NH4CLis its conjugate salt

options no c is correct

2 is the right answer

NH3 is - sp3

and PCl5 is - sp3d

so, only option matching is Option B

CH3COOHNa will give basic solutions becaus they created from strong base and weak acid.

and NH4Cl will give acidic solution because it is made up of strong acid and weak base.hence NH4Cl more acidic

Human life requires a tightly controlled pH level in the serum ofabout 7.4(a slightly alkaline range of7.35to 7.45) to survive

ii) Carbohydrates gives us energy

option A) is the correct answer

24.option (b) is the correct answer

Plz like my answer and accepted as best Plz

23.option A is the correct answer

24.option C is the correct answer

24.option b is the correct answer

option A ) option D) is the correct answer is

23 in this A either B will not change oxidation state

we can keep mangoes in water it is so fresh

green coriander and mangoes

Mangoes and green coriander

we can keep mangoes fresh in water for long time

Mango is the right answer

We can keep mangoes and green coriander fresh in water for a long time

green coriander will remain fresh in some water

Oxidation-reduction(redox)reactionsare important because they are the principal sources of energy on this planet, both natural or biological and artificial. Oxidation of molecules by removal of hydrogen or combination with oxygen normally liberates large quantities of energy.

because they are the principal sources of energy on this planet, both natural or biological and artificial and both oxidation and reduction take place simultaneously

because they are the principal sources of energy on this planet, both natural or biological and artificial and both oxidation and reduction take place simultaneously

1. Metallurgy: A suitable reducing agent is used to reduce metal oxides into metals. For example: Fe2O3is reduced to iron in blast furnace by using coke as a reducing agent.

2. In batteries: The stored electrical energy in electrochemical cells and batteries is obtained by the reaction of hydrogen and oxygen in fuel cells using hydrogen and oxygen electrodes.

3. Bleaching: Bleaches are actually oxidising agents such as Hydrogen Peroxide. Oxidising agents like this reduce the hypo chlorite ion(which is mainly found in commercial preparations) to chloride ions and hydroxide ions forming a basic solution.

A mineral is a naturally occurring chemical compound, usually of crystalline form and not produced by life processes. A mineral has one specific chemical composition, whereas a rock can be an aggregate of different minerals or mineraloids.Please hit the like button if this helped you

Redox is a chemical reaction in which the oxidation states of atoms are changed. Any such reaction involves both a reduction process and a complementary oxidation process, two key concepts involved with electron transfer processes

If oxidation and reduction occurs in the same reaction such reactions are called redox reaction

A redox reaction is a type of electrochemical reaction where oxidation and reduction occur simultaneously.

4I⁻ + MnO₄ + 2H₂O ---------- I₂ + MnO₂ + 4OH⁻

Mno4+ I2 - Mn(o2 )2+I 2

for H2O, the oxidation number of Oxygen is -2 and hydrogen is +1

Major periodic trends include:electronegativity,ionization energy,electron affinity,atomic radius, metallic character, ionic radius and reactivity. periodic trends arise from the arrangement of elements in the periodic table and allow chemists to quickly and reliably predict an element's properties.

we know that ∆x.∆p≥h/4π

→1×10^-5×∆x≥6.6×10^-34/4×3.14

→∆x≥6.6×10^-34/(4×3.14)(10^-5)

→∆x≥0.525×10^-29

→∆x≥5.25×10^-30m

the minimum value is 5.25×10^-30m

it's 5.27*10^-30m

The compond marked brown is formed.

Additional info -..

The brown ring test is a test for the presence of nitrate ions (NO3-) in solution. The test is very simple. Here is the procedure:

Put a sample of your test solution (3 mL) into a test tube and acidify it with 3 M H2SO4 (1 mL).

Add a 1 mL of freshly made FeSO4 and mix well.

Now, slowly, carefully, add concentrated H2SO4 down the side of the test tube (tilt the tube).

The sulfuric acid is very dense and it will pass through your test solution and go to the bottom of your test tube. At the interface between the concentrated H2SO4 and the test solution, a brown ring will form if nitrate is present in the test solution.

The combination of Fe2+ and H2SO4 converts the nitrate ion into NO. The NO then complexes with the Fe2+ to make FeNO2+ which is a brown-green complex ion. Since this reaction occurs at the interface between the test solution and the concentrated H2SO4, the FeNO2+ complex ion makes what appears to be a brown ring at the interface.

Now, the complex itself, though often written as FeNO2+ is actually Fe(H2O)5NO2+. It is an iron II ion in the center of an octahedral complex with five water molecules and one NO molecule surrounding it. Since sulfate is present, the compound made would be Fe(H2O)5NOSO4, or pentaaquanitrosyliron(II) sulfate.

When you soak the seeds of Bean and observe them after 2-3 days, the seed would be germinated.

During the process of germination, one must fill the seed with water which activates the growth enzyme.

The root is come out and accesses the available underground water.

The shoot is grown towards the Sun.

i think d इस right answer

explain

i think i don't know know what is right answer

All of this are interdependent and also a continuous functions hence Option d). is correct.

when ethanol reacts with sulphuric acid the end product is ethane ( which is an alkane) .CH3-CH2-OH → (H2SO4 + heat) → CH2=CH2 + H2O

SN 1 reaction reactivity is directly proportional to the stability of cation.In option B due to resonance positive charge became more stable and hence more reactive as well.

the correct answer is all of rhe above will go cannizaeo reaction.. as

in all cases there is no.. alpha H present just befor -CHO

so A,B,C and D.

The limiting reagent here is NaHCO3 Hence the answer is 4

thank you!

(2) Benzene is correct.

Explanation: Refer to the image for reaction.

1

2

I want mechanism of last reaction

sodium nitrate would given sodium ion to react with ethyl chloride

Charles's law is an experimental gas law that describes how gases tend to expand when heated. A modern statement of Charles's law is: When the pressure on a sample of a dry gas is held constant, the Kelvin temperature and the volume will be in direct proportion.

‘X’ is copper (Cu) and the black-coloured compound formed is copper oxide (CuO). The equation of the reaction involved on heating copper is given below.2Cu+O2---2CuO.

Theferrous sulphate crystalsare light greenincolour. The gas emitted has the characteristic odour of burning sulphur. Onheating, thecolour changesfrom lightgreento white. On furtherheating, the white substance changesto dark brown solid.

no it is always a mixture.

It is not a single colour. You can seperate it by the process of chromotography. Follow the steps to do the chromotography.

1. Take a think strip of filter paper

2. Dras a line on it using a pencil, approximately 3cm above the lower edge

3. Put a small drop of ink (from sketch pen) at the centre of the line.

4.Let it dry

5. Lower the filter paper into a jar/glass containing waer o that the drop of ink on the paper is just above the water level .

6. Leave undisturbed

Then the water will rise on the filter paper. The water takes the dye particles along with it and it seperates the colours as shown in the figure

Colored components can be separated by the method of chromatography ( paper chromatography ) which works on the principle that those colored component which are more soluble in water rises and in this way , colors of different dyes present in blue-black ink gets separated.

Wrought Iron is the purest form of iron. It contains 0.12 to 0.25% carbon and so it is the purest form of iron.

Rain water is considered the purest form of water. Impurities and salts present in water on earth are left behind during vaporisation by the sun. However, the rain water we receive on earth is not necessarily pure, as it brings down impurities and particles present in the atmosphere along with it.