Number of moles of Mn required to oxidise one mole of ferrous oxalate completely in acidic medium will be
1. 0.6 mole
2. 0.4 mole
3. 7.5 moles
4. 0.2 mole
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe total number of valence electrons in 4.2g of ion is (NA is the Avogadro's number)
1. 2.1NA
2. 4.2NA
3. 1.6NA
4. 3.2NA
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen 22.4L of H2(g) is mixed with 11.2L of Cl2(g) each at STP, the moles of HCl(g) formed is equal to
1. 1 mole of HCl(g)
2. 2 moles of HCl(g)
3. 0.5 mole of HCl(g)
4. 1.5 moles of HCl(g)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (at. mass of Al = 27)
1. 180 kg
2. 270 kg
3. 540 kg
4. 90 kg
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the Haber process, 30 L of dihydrogen and 30 L of dinitrogen were taken for the reaction, which yielded only 50% of the expected product. The composition of the gaseous mixture under the said conditions in the end is:
1. 20 L ammonia, 10 L nitrogen, 30 L hydrogen
2. 20 L ammonia, 25 L nitrogen, 15 L hydrogen
3. 20 L ammonia, 20 L nitrogen, 20 L hydrogen
4. 10 L ammonia, 25 L nitrogen, 15 L hydrogen
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of atoms in 4.25 g of NH3 is approximately
1. 4 x 1023
2. 2 x 1023
3. 1 x 1023
4. 6 x 1023
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the reaction, 4NH3(g)+ 5O2(g) 4NO(g) +6H2O(l)
When 1 mole of ammonia and 1 mole of O2 reacts to completion, then:
1. | 1.0 mole of H2O is produced. |
2. | 1.0 mole of NO will be produced. |
3. | All the oxygen will be consumed. |
4. | All the ammonia will be consumed. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn element X has the following isotopic composition:
200X : 90%, 199X : 8.0%, 202X : 2.0%
The weighted average atomic mass of the naturally occurring element X is closest to
1. 201 u
2. 202 u
3. 199 u
4. 200 u
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology0.24g of a volatile gas, upon vaporisation, gives 45 mL vapour at NTP. What will be the vapour density of the substance?
(Density of H2 = 0.089)
1. 95.93
2. 59.93
3. 95.39
4. 5.993
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe hydrated salt, Na2SO4.nH2O, undergoes a 55% loss in mass on heating and becomes anhydrous. The value of n will be:
1. 5
2. 3
3. 7
4. 10
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology