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questions
List of practice Questions
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
'x' grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28 g. What is the value of 'x' in grams ?
Chemistry
Some basic concepts of chemistry
x g of Ag was dissolved in
$HNO_3$
and the solution was treated with excess of NaCl when 2.87 g of AgCl was precipitated. The value of x is
Chemistry
Some basic concepts of chemistry
With increase of temperature, which of these changes ?
Chemistry
Some basic concepts of chemistry
Which of the postulates of Dalton's atomic theory is incorrect:
Chemistry
Some basic concepts of chemistry
Which of the following samples contains the smallest number of atoms ?
Chemistry
Some basic concepts of chemistry
Which of the following is the most accurate measurement?
Chemistry
Some basic concepts of chemistry
Which of the following has the highest mass ?
Chemistry
Some basic concepts of chemistry
$74.5\, g$
of a metallic chloride contain
$35.5\, g$
of chlorine. The equivalent weight of the metal is
Chemistry
Some basic concepts of chemistry
The least count of an instrument is
$0.01\, cm$
: Taking all precautions, the most possible error in the measurement can be:
Chemistry
Some basic concepts of chemistry
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