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Chemistry
List of top Chemistry Questions
Law of constant composition does not hold good for
Chemistry
Some basic concepts of chemistry
NO reacts with
$O_2$
to form
$NO_2$
. When 10 g of
$NO_2$
is formed during the reaction, the mass of
$O_2$
consumed is
Chemistry
Some basic concepts of chemistry
On analysis a certain compound was found to contain iodine and oxygen in the ratio of 254 g of iodine (at. mass 127) and 80 g oxygen (at. mass16). What is the formula of the compound ?
Chemistry
Some basic concepts of chemistry
One atom of an element weighs
$3.32\times 10^{23}\, g$
. How many number of gram atoms are there in
$20\, kg$
of the element?
Chemistry
Some basic concepts of chemistry
One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles of aluminium oxide are formed ?
Chemistry
Some basic concepts of chemistry
One requires 0.01 mole of
$Na_2CO_3$
. Mass of
$Na_2CO_3.10 H_2O$
to be taken is
Chemistry
Some basic concepts of chemistry
Out of 1.0 g dioxygen 1.0 g (atomic) oxygen and 1.0 g ozone the maximum number of oxygen atoms are contained in
Chemistry
Some basic concepts of chemistry
The equivalent weight of
$ {MnSO_4}$
is half its molecular weight when it is converted into
Chemistry
Some basic concepts of chemistry
The systematic name of
$C_{17}H_{35}COOH$
is
Chemistry
Some basic concepts of chemistry
The systematic name of
$(CH_3)_2CH-COOH$
is
Chemistry
Some basic concepts of chemistry
The total number of gm-molecules of
$SO_2Cl_2$
in 13.5 g of sulphuryl chloride .is
Chemistry
Some basic concepts of chemistry
The weight of a molecule of the compound
$C_{60}\, H_{122}$
is
$(a \times 10^{-23})$
grams. Approximate value o f $???
Chemistry
Some basic concepts of chemistry
Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is
$3.0\, g$
. On the basis of given data, mark the correct option out of the following statements.
Chemistry
Some basic concepts of chemistry
Two students X and Y report the weight of the same substance as 4.0 g and 4.00 g respectively. Which of the following statement is correct?
Chemistry
Some basic concepts of chemistry
Under S.T.P. 1 mol of
$N_2$
and 3 mol of
$H_2$
will form on complete reaction
Chemistry
Some basic concepts of chemistry
Volume of 0.1 M
$K_2Cr_2O_7$
required to oxidise 35 mL of 0.5 M
$FeSO_4$
solution is
Chemistry
Some basic concepts of chemistry
Volume of a gas at STP is
$1.12 \times 10^{-7}$
cc.Calculate the no. of molecules in it
Chemistry
Some basic concepts of chemistry
What is correct for 10 g of
$CaCO_3$
?
Chemistry
Some basic concepts of chemistry
What is the mass of carbon dioxide which contains the same number of molecules as are contained in
$40\, g$
of oxygen?
Chemistry
Some basic concepts of chemistry
What is the mass per cent of oxygen in ethanol?
Chemistry
Some basic concepts of chemistry
What volume of hydrogen gas, at
$273\, K$
and
$1$
atm. pressure will be consumed in obtaining
$21.6 \,g$
of elemental boron (atomic mass
$= 10.8$
) from the reduction of boron trichloride by hydrogen ?
Chemistry
Some basic concepts of chemistry
What will be the mass of
$100$
atoms of hydrogen?
Chemistry
Some basic concepts of chemistry
What will be the molality of the solution containing
$18.25\, g$
of
$HCl$
gas in
$500\, g$
of water?
Chemistry
Some basic concepts of chemistry
What will be the weight of
$CO$
having the same number of oxygen atoms as present in
$22\, g$
of
$CO_{2}$
?
Chemistry
Some basic concepts of chemistry
Which of the following contains maximum number of atoms ?
Chemistry
Some basic concepts of chemistry
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