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Q. No.An organic compound contains 80 % (by wt.) carbon and the remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of C is 12, H is 1]
1. CH3
2. CH4
3. CH
4. CH2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe maximum number of atoms is present in which of the following -
1. 1 g of Mg(s)
2. 1 g of O2 (g)
3. 1 g of Li(s)
4. 1 g of Ag(s)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOne mole of carbon atom weighs 12 g, the number of atoms in it is equal to, (Mass of carbon – 12 is )
(1)
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is -
1. 40 mol
2. 10 mol
3. 20 mol
4. 30 mol
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe density of a 2 M aqueous solution of NaOH is 1.28 g/. The molality of the solution is
[molecular mass of NaOH = 40 ]
1. 1.20 m
2. 1.56 m
3. 1.67 m
4. 1.32 m
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l)
[Calculate upto the second place of decimal point]
1. 9.50 g
2. 1.25 g
3. 1.32 g
4. 3.65 g
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch list-I with list-II:
| List-I | List-II | ||
| (a) | 4.48 litres of O2 at STP | (i) | 0.2 moles |
| (b) | 12.022 × 1022 molecules of H2O | (ii) | 12.044 × 1023 molecules |
| (c) | 96 g of O2 | (iii) | 6.4 g |
| (d) | 88 g of CO2 | (iv) | 67.2 litres at STP |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (iv) | (ii) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (iii) | (i) | (ii) | (iv) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 5375 × 10–3 g
2. 5.4 g
3. 5.38 g
4. 53.75 g
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
- 1(current)
Q. No.
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