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Recent questions tagged some-basic-concepts-of-chemistry
Questions
What is weight of NaOH present in 250 cc of a 2M Solution ?
cl135748
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 2, 2022
by
meena.clay6
1
answer
Which one of the following is not true ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
Equal moles of hydrogen and oxygen gases are placed in a container with a pin- hole through which both can escape. what fraction of the oxygen escapes in the time required for one half of the hydrogen to escape ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
What is limiting reagent?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
Calculate the amount of water in gm produced by the combustion of 8 gms of Ethane
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
What is heterogeneous mixture? Give an example.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
If $500\;mL$ of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 14, 2019
by
meena.clay6
1
answer
An oxide of metal contains $60\%$ of the metal. What will be the equivalent weight of the metal ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 14, 2019
by
meena.clay6
1
answer
How many moles of electron weight one kiligram ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What is molarity of a solution contain $5.84\;gms$ of $NaCl$ in 200 ml of solution ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What is the percentage of carbon , hydrogen and oxygen in ethanol ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What do you mean by gram atomic mass. one million silver atoms weigh $1.79 \times 10^{16}\;g$ . Calculate the gram atomic mass of silver.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
How can we say that sugar is solid and water is liquid ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
write the number of moles in 8g of helium
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
$4g$ of impure $CaCO_3$ on treatment with excess HCl produces $0.88\; g\; CO_2$. What is the percent purity of $CaCO_3$ sample?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
Vapour density of a gas is 22. What is its molecular mass?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Which pair of species have same percentage of carbon?$(A) CH_3COOH \;and\; C_6H_{12}O_6\\ (B) CH_3COOH\; and\; C_2H_5OH \\ (C) HCOOCH_3 \;and\; C_{12}H_{22}O_{11} \\ (D) C_6H_{12}O_6 \;and C_{12}H_{22}O_{11}$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
How many moles of electrons weigh one kilogram?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
The density of $2M$ solution of sodium chloride (NaCl) $1.13\; g\; mol/litre$. Calculate molality of the solution. $M= 2$ mol per litre.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Calculate the molecular mass of Ethane $(C_2H_6)$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Distinguish between pure substance and mixture
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
What is limiting reagent?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
What is a stoichiometry?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
How are physicial properties different from chemical properties ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 15, 2019
by
meena.clay6
1
answer
What is the difference between molecules and compounds ? give examples of each
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 15, 2019
by
meena.clay6
1
answer
How much copper can be obtained from 100 g of copper sulphate $(CuSO_4)?$ (Atomic mass of $Cu=63.5\;amu$)
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Write any four postulates of Daltons atomic theory
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Calculate the percentage composition of element in methanol $(CH_2OH)$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Calculate the formula mass of KCl (Potassium chloride)
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
State Law of Multiple proportions
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Write the formula used to calculate the % composition of elements
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
What is meant by dimensional analysis?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
$6.02 \times 10^{20}$ molecules of urea are present in 100 mL of its Solution. The concentration of solution is
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
When 22.4 L of $H_2(g)$ is mixed with $11.2\;L$ of $Cl_2(g)$ each of at STP the moles of HCl(g) formed is equal to
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
If the concentration of glucose $(C_6H_{12}O_6)$ in blood is $0.9\;g\;L^{-1}$. What will be the molarity of glugose in blood ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
What will be the molarity of a solution , which contains 5.85 g of Nacl per 500 mL?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
The molarity of con.HCl is $1.15\;M$. What volume of con. HCl is required to make 1.00 of 0.1M HCl
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
2
answers
The molarity of con. HCl is 1.15 M; What volume of con. HCl is required to make 1.00 of $0.1\;M\;HCl$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
How much AgCl will be formed by adding 200 ml of 5 M HCl to the solution containing 1.7 gms of $Ag NO_3$?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
What is weight of NaOH present in 250 cc of a 2M Solution ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
Calculate the number of moles of $H_2SO_4$ present in $50\; ml$ of $0.2 \;m\;H_2SO_4$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
How are physical properties different from chemical properties ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 7, 2019
by
meena.clay6
1
answer
How can we separate the componenets of a compound ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 7, 2019
by
meena.clay6
1
answer
What is the difference between molecules and compounds ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 6, 2019
by
meena.clay6
1
answer
Moles of sodium thiosulphate reacted and unreacted after the reaction are respecticvely
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Jan 18, 2016
by
meena.p
1
answer
Four one litre flasks are separately filled with the gases hydrogen, helium , oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Apr 1, 2014
by
meena.p
1
answer
Which of the following has the largest number of atoms?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Mar 31, 2014
by
meena.p
1
answer
When a sample of human blood is diluted $200$ times its initial volume and microscopically examined in a layer $0.10\;mm$ thick , an average of $30\;RBC$ are found in $100 \times 100 $ micrometer square. The number of RBC in $1 \;mm^3$ of undiluted blood is
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
jeemain
physical-chemistry
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
difficult
asked
Mar 31, 2014
by
meena.p
1
answer
$29.2\%$(w/w) $HCl$ stock solution has a density of $1.25gmL^{-1}$. The molecular weight of $HCl$ is $36.5g\;mol^{-1}.$ Find the volume $(ml)$ of stock solution required to prepare a $200\;ml$ of $0.4\;M\; HCl$ is
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
jeemain
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
medium
asked
Feb 13, 2014
by
sreemathi.v
1
answer
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