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

Uma asked a question

Subject: Chemistry, asked on on 27/2/19

a molecule XY3 contains 3 sigma bonds and 2 lone pairs on an atom , predict the hybridization

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 .

Akshitha Rao asked a question

Subject: Chemistry, asked on on 21/6/19

Good evening mam
i am akshitha. could not attend the clss due to lack of internet connection.
i have some doubts

does thi mean that
1gramCO2 and 1gram molecule CO2 are different

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

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

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.

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.....

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.

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 ?

Alok Singh asked a question

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

Calculate the oxidation number of Mn in KMnO₄, S in H₂S₄O₆and P in H₂P₂O₇?

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

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

Ramninder Singh Purba asked a question

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

language problem

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

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

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 ?

Shaffron asked a question

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

State the principle of measurement of a physical quantity.

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

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.

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

Krishna Vamsi asked a question

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

calculate the weight in gramsof 0.9 gram atoms of zinc

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

Bhavya Arora asked a question

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

How to determine atomicity using Avogadro law?

Krishna Vamsi asked a question

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

a solution contain 1.2046*10^24 hydrochloric acid molecules in one dm^3 of the solution the strength of the solution is

Jobin Jacob asked a question

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

the no of hcl molecules present in 1cm^3 of its 1M solution 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 ?

Akshita asked a question

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

ques no 13 and 14 with explaination

Krishna Vamsi asked a question

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

molarity of 0.2n h2so4 is

Vishal Khandelwal 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

Akshita asked a question

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

ques no 17 and 19

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 ?
'

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

Alok Singh asked a question

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

How many Oxygen, Hydrogen and Carbon atoms does 12 g of Citral ( C₁₀ H₁₆O ) contains ?

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 ?

Akshita asked a question

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

How to slovequestions of empricial formula ????

Adithya asked a question

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

what is volume strength of H2O2 , Degree of Hardness and % labelling of fuming h2so4 please explain all these terms with examples

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

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

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

Pianist asked a question

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

Kind explain question number 72 and 73

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???

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

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 ?

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.

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

Akshita asked a question

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

ques no 4 with explaination

Ramninder Singh Purba asked a question

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

Explain Molar Volume?????

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

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???

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.

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?