Given below are two statements:

Assertion (A):	When 4 moles of H2 reacts with 2 moles of O2, then 4 moles of water are formed.
Reason (R):	O2 will act as a limiting reagent.

 

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

Which of the following has the greatest number of molecules?

1. 64 g SO₂ 

2. 44 g CO₂

3. 48 g O₃ 

4. 8 g H₂

When 22.4 L of H₂ (g) is mixed with 11.2 L of Cl₂ (g), each at STP, the moles of HCl(g) formed is equal to -

Percentage of C, H & N in a compound is given as follows:
C=40%; H=13.33%; N=46.67%

The empirical formula of the compound will be:
1. $C{H}_{2}N$
2. $C_2{H}_{4}N$
3. $C{H}_{4}N$
4. $C{H}_{3}N$

How many significant figures are present in the following numbers?

1. 3, 3, 3
2. 3, 4, 3
3. 3, 2, 3
4. 3, 4, 4

0.33%  of iron (by weight) is present in hemoglobin (Molecular wt = 67200). The number of iron atom(s) in one molecule will be:

$4N{H}_3$ $+$ $5O_2$ $\to$ $6H_{2}O$ $+$ $4NO$

When 1 mole of ammonia (NH₃) reacts with 1 mole of oxygen (O₂), which of the following outcomes occurs regarding the consumption of the reactants?

The maximum number of molecules is present in: