1.
The largest number of molecules among the following is –
2.
A compound having the empirical formula (C3H4O) has a molecular weight of 168. The molecular formula of this compound is –
3.
The hemoglobin from the red blood corpuscles of most mammals contains approximately 0.33% of iron by weight. The molecular weight of hemoglobin is 67,200. The number of iron atoms in each molecule of hemoglobin is (Atomic weight of iron = 56):
4.
Number of molecules present in 0.18 g H2O are
5.
Ritish needs 1.71 g of sugar (C12H22O11) to sweeten his tea. What would be the number of carbon atoms present in his tea?
6.
Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is –
7.
The hydrogen phosphate of a metal has the formula MHPO4. The formula of its chloride would be
8.
A piece of sodium weighs 0.023 g. The number of atoms present in it are
9.
X and Y atoms have 2 and 6 valence electrons in their outermost shells respectively. The compound which X and Y are likely to form is –
10.
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