Basic Concepts In Chemistry, Popular Questions: Neet 2 year CHEMISTRY, Chemistry

Adithya asked a question

Subject: Chemistry, asked on on 21/6/16

what is n factor of mohr's salt how to calculate it explain in detail please

Amruthavarshini Karuru asked a question

Subject: Chemistry, asked on on 19/4/19

haemoglobin contains 0.33% iron . the molecular weight of haemoglobin is 68000. the number of iron atoms in one molecule of haemoglobin is.....?

Gaurav Gupta & 1 other asked a question

Subject: Chemistry, asked on on 14/7/16

Formation of polyethylene from calcium carbide takes place as follows:
CaC₂ + H₂O -> Ca(OH)₂ + C₂H₂ -> C₂H₄
 n(C₂H₄) -> ( -CH₂-CH₂- )_n
Determine the amount of polyethylene possibly obtainable from 64.0 kg CaCl₂ .

Uma asked a question

Subject: Chemistry, asked on on 17/8/18

THIS IS A MATH DOUBT PLS ANSWER THIS ASAP,
Prove -
cos (pi/4 - x) cos(pi/4-y) - sin(pi/4-x) sin (pi/4 -y ) = sin (x+y)

Manideep Varma asked a question

Subject: Chemistry, asked on on 8/7/16

vapour pressure of pure water is 40mm.if a non volatile solute is added to it vapour pressure falls by 4mm,hence molarity of solution is

Chirag Mudgil asked a question

Subject: Chemistry, asked on on 13/7/18

HOW MUCH COPPER IS OBTAINED FROM 100gOF COPPER CARBONATE CUCO3, HOW MANY MOLES OF C02 GET BY THERMAL DECOMPOSITION OF 150G OF COPPER CARBONATE ?

Kashish Verma asked a question

Subject: Chemistry, asked on on 3/6/16

calculate the volume of water required to add in mixture of 250 ml of 0.6 M HCl and 750ml of 0.2 M HCl to obtain 0.25 M solution of HCl.

Bhavya Arora asked a question

Subject: Chemistry, asked on on 22/5/17

An organic compound was found to contain the following constituents : C 33% H 4.7% N 13.2% Cl 33.4%. Determine the empirical formula.

Siddharth Sudhakar asked a question

Subject: Chemistry, asked on on 28/7/16

What volume of H₂ at STP is required to reduce 0.795 of CuO to give Cu and H₂O.

Manasi Mujumdar asked a question

Subject: Chemistry, asked on on 6/10/17

Solubility of which among the following solids in water changes slightly with temperature?
(A) KNO3 (B) NaNO3 (C) KBr (D) NaBr

Awadhesh Thakkar asked a question

Subject: Chemistry, asked on on 15/12/16

what concentration of HCOO is present in a solution of 0.01M HCOOH ( Ka = 1.8*10^-4 ) and 0.01M HCL ?

Krishna Vamsi asked a question

Subject: Chemistry, asked on on 29/6/16

the volume of 1.5m h3po4 solution required to neutralize exactly 90 ml of a 0.5m ba(oh)2 solution is

Sarvesh Kumar asked a question

Subject: Chemistry, asked on on 12/5/17

Vitamin C is essential for the prevention of scurvy. Combustion of 0.2000g of vitamin C gives 0.2998g of CO2 and 0.819g of H2O. What is the empirical formula of vitamin C?

Ramninder Singh Purba asked a question

Subject: Chemistry, asked on on 20/4/16

language problem

Ranjitha R asked a question

Subject: Chemistry, asked on on 5/8/17

Do plasma and BEC have intermolecular forces or attraction

Vaishnavi asked a question

Subject: Chemistry, asked on on 3/8/17

the molar mass f a substance is 20g...the molecular mass of the substance is.....

Almas asked a question

Subject: Chemistry, asked on on 10/4/17

What is the value of n-factor of [Fe(CN)₆]^4- in the given reaction
[Fe(CN)₆]^-4 .....in presence of MnO₄^- / H⁺--> Fe³⁺ + CO₂ + NO₃^-
a) 18
b) 31
c) 61
d) 28

Krishna Vamsi asked a question

Subject: Chemistry, asked on on 30/5/16

calculate the weight in gramsof 0.9 gram atoms of zinc

Deeksha Tanwar asked a question

Subject: Chemistry, asked on on 2/9/17

the values of Kp₁ and Kp₂for the reaction X=Y+Z and A=2B are in ratio of 9:1 . if the degree of dissociation of Xand A are equal the total pressure at equibrium in both reactions are in the ratio of?

Adithya asked a question

Subject: Chemistry, asked on on 6/6/16

calculate the total molarity and normality of all the ions present in a solution containing 0.1M CuSO₄and 0.1M Al₂(SO₄)₃

Shaffron asked a question

Subject: Chemistry, asked on on 10/5/17

State the principle of measurement of a physical quantity.

Medha asked a question

Subject: Chemistry, asked on on 19/5/16

calculate the emperical formula of a compound "A" which is obtained from the catalytic hydrogenation of acetiline if this compound contains 92.7% carbon and 7.3% hydrogen???

Almas asked a question

Subject: Chemistry, asked on on 24/1/17

If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place. The volume finally obtained would be approximately
a) 800 ml
b) 200 ml
c) 10 ml
d) zero
Please tell how to approach these kind of questions

Adithya asked a question

Subject: Chemistry, asked on on 6/6/16

calculate the normality of mixture 10g equivalents of KOH are added in 1L of 5N HNO₃ solution

Almas asked a question

Subject: Chemistry, asked on on 29/11/16

If M is the molar mass of P₄, then its equivalent mass in the reaction is
P₄ + OH^- ----> PH₃ + H₂PO₂^-
a) M/12
b) M/4
c) M/3
d) M

Pianist asked a question

Subject: Chemistry, asked on on 1/9/17

What is stock solution?

Bhavya Arora asked a question

Subject: Chemistry, asked on on 19/5/17

How to determine atomicity using Avogadro law?

Adithya asked a question

Subject: Chemistry, asked on on 18/6/16

50g of CaCO₃is added in 500mL 5N H₂SO₄solution . calculate the normality of given mixture provided that the react with each other in the reaction CaCO3+H2SO4----> CaSO4+H2O when they react we use the formula Nmix= N1V1-N2V2/V1+V2why is that "minus -" sign n general why when they react we use this formula pls explain in detail

Nevadhya asked a question

Subject: Chemistry, asked on on 29/6/16

10 g of a crystalline metal sulphate salt when heated generates approximately 6.4 g of an anhydrous salt of the same metal. The molecular weight of the anhydrous salt is 160 g. The number of water molecule present in the crystal is :
A) 1
B) 2
C) 3
D) 5

Harsh Sharma asked a question

Subject: Chemistry, asked on on 25/4/16

plzzzz explain me these terms in briefly galactose , glycolipids , glycoproteins ?

Krishna Vamsi asked a question

Subject: Chemistry, asked on on 23/6/16

molarity of 0.2n h2so4 is

Sudipti Kumar asked a question

Subject: Chemistry, asked on on 24/4/16

Mam , when we will multiply (6.023 * 10^23) * (1.382 * 10^-23), 10^23 and 10^-23 will turn into 10^0 ?

Vinay asked a question

Subject: Chemistry, asked on on 9/5/17

good sir u r teaching very well i can understand every concept well.
is ncert enough for competative exams like neet and jee.
if not
sir i am not able to afford costly books so please suggest me some good book

Akshita asked a question

Subject: Chemistry, asked on on 18/7/17

ques no 17 and 19

Priyanka Priyanka asked a question

Subject: Chemistry, asked on on 29/7/17

Mole fraction of solvent in aqueous solution of naoh having molality of 3 is ?

Deepshika Subramani asked a question

Subject: Chemistry, asked on on 20/4/16

sir is molar mass and molecular mass the same thing or is atomic mass and molar mass the same thing

Manideep Varma asked a question

Subject: Chemistry, asked on on 26/6/16

when 200ml of 1.2m hcl is mixed with 100ml of water then what will be the new molarity of the solution after dilution

Mohammed Siddique .m asked a question

Subject: Chemistry, asked on on 9/7/17

A solution of A(MM=20) and B(MM=10)[Mole fraction xB=0.6]having desity 0.7 gm/ml,then molarity and molaity of b in this solution will be

Almas asked a question

Subject: Chemistry, asked on on 26/11/16

The molarity of HCl formed on mixing equal volumes of 1 M BaCl₂ and 0.4 M H₂SO₄ is ?

Siddharth Rathore asked a question

Subject: Chemistry, asked on on 31/8/16

Solve this.

Akshita asked a question

Subject: Chemistry, asked on on 28/6/17

How to slovequestions of empricial formula ????

Aldrin Inbaraj asked a question

Subject: Chemistry, asked on on 13/6/16

1.50x10⁵and 150000 are the same but have different significant figures why

Adithya asked a question

Subject: Chemistry, asked on on 6/6/16

calculate the normality of mixture when 200ml of 0.2N HCl and 100ml of 0.5N NaOH are mixed

Pianist asked a question

Subject: Chemistry, asked on on 28/6/17

Kind explain question number 72 and 73

Pyb asked a question

Subject: Chemistry, asked on on 20/4/16

IS THE PROPERTIES OF A COMPOUND IS SAME OR DIFFERENT TO THE PROPERTIES OF ITS CONSTITUENT ELEMENTS. FOR EXAMPLE- THE PROPERTIES OF A COMPOUND WATER IS SAME OR DIFFERENT TO THE PROPERTIES OF ITS CONSTITUENTS ELEMENTS HYDROGEN AND OXYGEN

Priyanka Priyanka asked a question

Subject: Chemistry, asked on on 29/7/17

In the reaction 2so2+02------>2so3 when one mole of o2 are made to react

Shifa asked a question

Subject: Chemistry, asked on on 9/12/16

Please explain

14. The least reactive alkene towards dil. HCl is

Bhavya Arora asked a question

Subject: Chemistry, asked on on 16/5/17

Silver chloride was prepared in two ways:- 1. 0.5g of a silver wire was dissolved in concentrated nitric acid and the excess hydrochloric acid was added to it.The precipitate of silver chloride was separated by filtration washed dried and then weighed. The weight of the residue was found to be 0.66g. 2. In other experiment 1g of silver metal was heated in a current of chlorine till it was completely converted into chloride whicj was found to weigh 1.32g

Kumud asked a question

Subject: Chemistry, asked on on 21/4/16

sie actuallu em not getting dat ...if the compound is conataining any impurity ...even if its single basic unit i.e as uh said entity consists o f impurity den d total ratio of the mass must change...must vary...den y its d d same???

Akshita asked a question

Subject: Chemistry, asked on on 18/7/17

ques no 13 and 14 with explaination

Yadav Ji asked a question

Subject: Chemistry, asked on on 20/4/17

sir kha rahate ho

Saloni Priya asked a question

Subject: Chemistry, asked on on 20/4/16

sir I can't understand the concept of accuracy and precision clearly. plzz explain in detail.

Akshita asked a question

Subject: Chemistry, asked on on 18/7/17

ques no 4 with explaination

Nevadhya asked a question

Subject: Chemistry, asked on on 29/6/16

Emulsification of 10 ml of oil in water produces 2.4 x 10¹⁸ droplets. If the surface tension at the oil-water interface is 0.03 Jm^-2x and the area of each droplet is 12.5 x 10^-16 m², the energy spent in the formation of oil droplets is :
A) 90 J
B) 30 J
C) 900 J
D) 10 J

Amal asked a question

Subject: Chemistry, asked on on 30/7/17

explain how can we convert moles into grams ,mo of particles and the topic related to this with clarity i concepts

Ramninder Singh Purba asked a question

Subject: Chemistry, asked on on 23/4/16

Explain Molar Volume?????

Anshika asked a question

Subject: Chemistry, asked on on 22/5/17

a) what will be the normality of 7 g/l H₂SO₄ ?
b) what will be the strength of N/8 KOH solution in g/l ?

Nevadhya asked a question

Subject: Chemistry, asked on on 29/6/16

Upon mixing equal volumes of aqueous solutions of 0.1 M HCl and 0.2 M H₂SO₄, the concentration of H⁺ in the resulting solution is :
A) 0.30 mol/L
B) 0.25 mol/L
C) 0.15 mol/L
D) 0.10 mol/L

Janvi asked a question

Subject: Chemistry, asked on on 22/4/16

why there is a need to find Molarity and Molality of a substabnce ?

Akshita asked a question

Subject: Chemistry, asked on on 18/7/17

ques no 24 may be 3 option and 25 may be 4 option with solution .

Ansh Pratap asked a question

Subject: Chemistry, asked on on 23/11/17

Describe a method of preparing oxygen without using a source of heat. mention a test of oxygen.
In long plz i want is fast.

Adithya asked a question

Subject: Chemistry, asked on on 13/6/16

Calculate the Normality of mixture when 200mLof 0.2N HCland 100mLof 0.5 NaOH are mixed they react each other in the reaction HCl+NaOH----> NaCl +H₂O

Jennifer Philip asked a question

Subject: Chemistry, asked on on 23/4/16

the other day in the live session on the classification of matter slide there was a statement " In compounds the properties ofconstituent elements is not
retained" what does this mean ?
'

Saloni Priya asked a question

Subject: Chemistry, asked on on 20/4/16

sir in ur video recording there was a question regarding significant numbers :
2.5 X 5.2= __________ and according to U it's answer is 13.0 .
Could U plzz explain the reason behind this ans , as in many refernce books like sl arora , it's given
to go with less number of significant number in case of multiplication and division.
Also according to me the answer should be 13.

Chhavi Tomer asked a question

Subject: Chemistry, asked on on 28/6/17

5.82gm of silver coin was dissolved in strong nitric acid and excess sodium chloride was added.the silver chloride precipitate were dried and weighed 7.2gm. calculate % of silver in the coin.

Aldrin Inbaraj asked a question

Subject: Chemistry, asked on on 18/6/16

A gas at 4 bar and 20^oC is heated to 30^oC at constant volume.Determine the final pressure of the gas

Suvarna Thapa asked a question

Subject: Chemistry, asked on on 15/10/16

in the session, there is a topic of conversion into fahrenheit , celcius, kelvin . There is a question temperature changes from 25 to 50 degree celsius...we have to represent this in kelvin and fahrenheit the answer for kelvin is 25 but for fahrenheit is should be 45 but in the recording it is given 25 and then there is a conclusion that no matter whatever maybe the conversions in temperatures the difference in all of them are same tht is here it is 25k & 25F is it correct?