The mass of  CO2 produced by heating 20 g of 20% pure limestone as per the given below equation is:
$$\left[\mathrm{CaCO}_3 \stackrel{1200 \mathrm{~K}}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_2\right]$$
 1 1.32 g 2 1.12 g 3 1.76 g 4 2.64 g
Subtopic:  Equation Based Problem |
72%
From NCERT
NEET - 2023
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Calculate the mass of 95% pure CaCO3 that will be required to neutralize 50 mL of 0.5 M HCl solution according to the following reaction.
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l)
[Calculate up to the second place of decimal point]
 1 9.50 g 2 1.25 g 3 1.32 g 4 3.65 g
Subtopic:  Equation Based Problem |
53%
From NCERT
NEET - 2022
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To produce 20 moles of ammonia via Haber's process, how many moles of hydrogen molecules are required?

 1 40 mol 2 10 mol 3 20 mol 4 30 mol
Subtopic:  Limiting Reagent | Equation Based Problem |
80%
From NCERT
NEET - 2019
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Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. If 0.1 mole of XYweighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weight of X and Y respectively, will be:

 1 40, 30 2 60, 40 3 20, 30 4 30, 20
Subtopic:  Equation Based Problem |
77%
From NCERT
NEET - 2016
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What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na= 23, Cl = 35.5)
1. 28 g
2. 3.5 g
3. 7 g
4. 14 g

Subtopic:  Equation Based Problem |
54%
From NCERT
NEET - 2015
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The volume of oxygen gas (O2) needed to completely burn 1 L of propane gas (C3H8)  (both O& propane measured at 0°C and 1 atm) will be:
1. 7 L
2. 6 L
3. 5 L
4. 10 L

Subtopic:  Equation Based Problem |
77%
From NCERT
AIPMT - 2008
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The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminum metal from bauxite by the Hall process is:

1. 90 kg

2. 540 kg

3. 180 kg

4. 270 kg

(Atomic mass : Al = 27)

Subtopic:  Equation Based Problem |
From NCERT
AIPMT - 2005
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The volume of CO2 obtained by the complete decomposition of 9.85 grams of BaCO3 is:

1. 2.24 lit.

2. 1.12 lit.

3. 0.84 lit.

4. 0.56 lit

Subtopic:  Equation Based Problem |
69%
From NCERT
AIPMT - 2000
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0.33%  of iron (by weight) is present in hemoglobin (Molecular wt = 67200).
The number of iron atom(s) in one molecule will be:

1.  1
2.  2
3.  3
4.  4

Subtopic:  Equation Based Problem |
71%
From NCERT
AIPMT - 1998
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