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Nitro's secondary suffix

Posted by A Sh. 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

-amine.

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What is the stable state of aggregation of hydrogen

Posted by Kavyashree G 4 years ago

CBSE > Class 11 > Chemistry

0 answers

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difference between amylose and amylopectin

Posted by Kartikey Mishra 3 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 9 months ago

Amylose	Amylopectin
It is a straight-chain polymer of D-glucose units	It is a branched-chain polymer of D-glucose units
Constitutes 20% of starch	Constitutes 80% of starch
Solubility in water is less	More soluble in water
Straight chain structure	Branched structure
Amylose stains blue with iodine	Amylopectin stains reddish-brown with iodine
Soluble in hot water without swelling	Soluble in hot water with swelling
Does not form a gel when hot water is added to it	Forms a gel when hot water is added to it

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Neil Bohrs modle of atom

Posted by Anshu Singhmar 4 years ago

CBSE > Class 11 > Chemistry

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A solution prepared by mixing of o.4 g of Na OH in 1000 of water. Answer the following (1)How many moles of NaOH is there in homogenous mixture? (2) what would be the amount of water present in solution in terms of mole? (3)what is the mole fraction of NaOH? (4)what is the total mole fraction of total mixture? (5)The density of the solution is 1.2 * 10-1 g / cm . cube ( g / cc) find the volume of the solution.

Posted by Phiban Risha 4 years ago

CBSE > Class 11 > Chemistry

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Sum of fraction is one. Mole fraction of water and sodium hydroxide would be?

Posted by Phiban Risha 4 years ago

CBSE > Class 11 > Chemistry

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A mixture contain 30% NA.How many moles of sodium present in the mixture?

Posted by Phiban Risha 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Aman Kushwaha 4 years ago

Suppose Out of 100g ,30g is NA Then, atomic mass = 23 Mole = 30/23 =1.3 mole (approx)

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How many grams of sodium present in 4.6 mol of sodium?

Posted by Phiban Risha 4 years ago

CBSE > Class 11 > Chemistry

2 answers

Phiban Risha 4 years ago

Thank you

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Anjan Karthi 4 years ago

Molar mass of sodium = 23 g. Moles = 4.6 mol. Therefore, required mass = Molar mass × no of moles = 23 × 4.6 = 105.8 g. //

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Calculate the percentage of N in NH3 Molecule

Posted by Atharv Tamboli 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

Molar mass of NH3 = 14 + 3(1) = 17 g. // Therefore, percentage composition of N in NH3 = (molar mass of N / Molar mass of NH3) × 100 = 1400/17 = 82.35%.//

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Calculate the molar mass of the following: 1. H2O 2. CO2 3. CH4

Posted by Alok Singh 4 years ago

CBSE > Class 11 > Chemistry

3 answers

Krishna Baranwal 4 years ago

Co2=12+2(16)=44u and ch4 =12+4(1)=16u and H2O=2(1)+16=18

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Anjan Karthi 4 years ago

2) CO2 = 12 + 2(16) = 44 g. // 3) CH4 = 12 + 4(1) = 16 g. //

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Narender Singh 4 years ago

1 . h ( 2 ) + O 2 + 16 = 18 amu

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in group-15 trihalides bond angle increases from fluoride to iodide? why

Posted by Harsh Patel 4 years ago

CBSE > Class 11 > Chemistry

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Find the number of (a) H atoms, (b) H2 molecules in 12 gm of H2 gas (H2=2.0 amu).

Posted by Avani Singh 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Komal Sharma 4 years ago

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Q12. Find the all concentration terms if 10 gm Na2SO4 dissolve in 500 ml of water (density=1.0 gm/ml).

Posted by Avani Singh 4 years ago

CBSE > Class 11 > Chemistry

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Q10. What will be the energy of photon moving with frequency 500A°.

Posted by Avani Singh 4 years ago

CBSE > Class 11 > Chemistry

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Q11. Find the empirical formula of the compound having 80% of Cu and 20% of S.

Posted by Avani Singh 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

n (Cu) = 80 / 63 = 1.26// n (S) = 20 / 32 = 0.625// Ratio = 1.26 : 0.625 = 2:1 (approx.) Therefore, empirical formula of compound is Cu2S.

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What type of bond will you expect between : I)metal and non metal II)metal and metal III)non metal and non metal

Posted by Jissmol Jacob Varghese 4 years ago

CBSE > Class 11 > Chemistry

3 answers

Anjan Karthi 4 years ago

Metal metal bond is called a CRYSTAL LATTICE bond.

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Aadhisesan Venkatesh 4 years ago

But I don't know about metal to metal bond sorry

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Aadhisesan Venkatesh 4 years ago

Metal to non metal = ionic bond Non metal to non metal = covalent bond

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a compound containing 40% of carbon 5.7%of hydrogen and 53.3%of oxygen has an atomic mass of 175 g/mol.what is the molecular formula?

Posted by Aaliya Hussainar 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

No of moles (C) = 40/12 = 3.33 . No of moles (H) = 6.7/1 = 6.7 . No of moles (O) = 53.3/16 = 3.33. Therefore, Ratio = C:H:O = 1:2:1. Empirical formula = CH2O. Mass of Empirical formula = 12 + 2 + 16 = 30 g. // N = 175/30 = 6 (approx). Therefore, molecular formula is C6H12O6.

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if the error in position of an element is 1.1 and strong find error in measurement of momentum

Posted by Ashman Preet Kaur Narwal 4 years ago

CBSE > Class 11 > Chemistry

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Why does chlorine has more election gain enthalpy than fluorine

Posted by Aagney S Madhavan 4 years ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

Though both fluorine and chlorine have same number of valence electrons, due to smaller valence orbital size of fluorine, the electron density in valence orbital is greater in fluorine than in chlorine. So, more effort would be required to insert a new electron in fluorine than in chlorine. So, chlorine has more negative electron gain enthalpy than in fluorine.

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Unit1

Posted by Amit Kumar 4 years, 1 month ago

CBSE > Class 11 > Chemistry

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calculate co2 in gm evolved by combustion of 16gm methane

Posted by Nidhi Kharwal 4 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Aashay Tembhurne 4 years ago

1 mole CH4 weighs 16g according to reaction 1mole of methane is required to produce 1 mole CO2 hence amount of CO2 produced is 12+32=44g

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Calculate the frequency and energy of photon having wavelength of 6000°A

Posted by Jin Woo Sung 4 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years ago

Wavelength = 6000 Å = 6 × 10^-7 m. V = 3 × 10^8 m/s. Therefore, frequency = v/wavelength = 3 × 10^8 / 6 × 10^-7 = 0.5 × 10^15 Hz. // Energy = hv/wavelength = 6.626 × 10^-34 × 0.5 × 10^15 = 3.313 × 10^-19 J. //

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Suppose the elements X and T combine to form two compounds XY2 and X3Y2 .When 0.1 mole of XY2 weight 10 g and 0.05 mole of X3Y2 weigh 0.9 g ,the atomic weights of X and Y are

Posted by Priyanka Khatri 4 years, 1 month ago

CBSE > Class 11 > Chemistry

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You are given a thread and a metre scale . How will you estimate the diameter of the thread

Posted by Khushi Yadav 4 years, 1 month ago

CBSE > Class 11 > Chemistry

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find the number of atoms of each type present in 3.42 g of cane sugar c12 h22 o11

Posted by Himanshi Tyagi 4 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 4 years, 1 month ago

Molar mass of C12H22O11 = 342 g. Given mass = 3.42 g. No. of atoms of C = 12 × 6.022 × 10^23 × 3.42/342 = 12 × 6.022 × 10^23 × 10^-2 = 72.264 × 10^21 atoms. // Similarly, find H and O atoms also.

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I want all formulas related to chemistry in pdf format with their name too

Posted by Rosa Deepti 4 years, 1 month ago

CBSE > Class 11 > Chemistry

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What is formed when CH3-CH2BR-CH2BR is treated with KOH ----------

Posted by Rebu Do 4 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Ansuman Rath 4 years, 1 month ago

Pagal

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D block . S block . P block F block Physical properties and chemical properties and it's applications

Posted by Nima Wongmu Bhutia 4 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 4 years, 1 month ago

(a) s-block elements:

All of the s-block elements are unified by the fact that their valence electrons (outermost electrons) are in an s orbital. The s orbital is spherical and can be occupied by a maximum of two electrons. All of the s-block elements are metals. In general, they are shiny, silvery, good conductors of heat and electricity and lose their valence electrons easily. In fact, they lose their trademark s orbital valence electrons so easily that the s-block elements are the most reactive elements.

(b) p- block elements:

Following are the properties of p-block elements.

They are solids/liquids/gases at room temperature (Br is liquid)
They have variable oxidation states
They form acidic oxides
Generally, they form covalent compounds
Halogens form salts with alkali metals
They have high ionization potentials
They have very large electron gain enthalpies
The aqueous solutions their oxides are acidic in nature.

Form stable complexes
Have high melting and boiling points
Contain large charge/radius ratio
Form compounds which are often paramagnetic
Are hard and possess high densities
Form compounds with profound catalytic activity
Show variable oxidation states
Form coloured ions and compounds.

(d) f-block elements:

They are usually heavy metals
These elements have a generally higher melting and boiling point
They display a variety of oxidisation states
These elements tend to form coloured ions
They form complex compounds

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How many grams of NaOH should be dissolved to make 100 cm*3 of 0.15 M NAOH solution

Posted by Priyanka Khatri 4 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Priyanka Khatri 4 years, 1 month ago

Kay aap muja chemistry ka chapter 2 nd ka notes send kar da ga plz

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Anjan Karthi 4 years, 1 month ago

MOLARITY = 0.15 M. Volume = 100 cubic cm = 0.1 L. Therefore, number of moles of NaOH = M × V = 0.15 × 0.1 = 0.015 moles. // Amount of NaOH = number of moles × Molar mass = 0.015 × 40 = 0.15 × 4 = 0.60 g. //

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How 2×10 to the power-3×2×6×10²³ after solving become 2.4×10²¹?

Posted by Daisy Singh 4 years, 1 month ago

CBSE > Class 11 > Chemistry