NEET UG, JEE Main Chemistry questions: Online Multiple Choice Questions (MCQs) with answers for NEET and JEE Main aspirants, Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions ...
1. Which has the maximum number of atoms?
a) 6 g C
b)1 g H2
c) 12 g Mg
d)30 g Ca
2. Mixing up of equal volumes of 0.1 M NaOH and 0.1 M CH3COOH yields a solution which is:
a) Basic
b)Acidic
c) Neutral
d)None of these
3. If 6.3 g of NaHCO3 are added to 15.0 g CH3COOH solution, the residue is found to weight 18.0 g. what is the mass of CO2 released in the reaction?
a) 4.5 g
b)3.3 g
c) 2.6 g
d)2.8 g
4. 50 mL of an aqueous solution of glucose contains 6.02 × 1022 molecules. The concentration of solution is:
a) 0.1 M
b)1.0 M
c) 0.2 M
d)2.0 M
5. Molar concentration of a solution in water is:
a) Always equal to normality of solution
b)More than molality of the solution
c) Equal to molality of the solution
d)Less than the molality of the solution
6. 1 kg of NaOH solution contains 4 g of NaOH. The approximate concentration of the solution is:
a) 1 molar
b)0.1 molar
c) Decinormal
d)About 0.1 N
7. How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
a) 0.333
b)0.011
c) 0.029
d)0.044
8. The nature of mixture obtained mixing 50 mL of 0.1 M H2SO4 and 50 mL of 0.1 M NaOH is:
a) Acidic
b)Basic
c) Neutral
d)amphoteric
9. Number of electrons in 1.8 mL of H2O is :
a) 6.02 × 1023
b)3.011 × 1023
c) 0.6022 × 1023
d)60.22 × 1023
10. If a compound contains two oxygen atoms, four carbon atoms and number of hydrogen atom is double of carbon atoms, the vapour density of it is:
a) 88
b)44
c) 132
d)72
11. Molecular weight of oxalic acid is 126. The weight of oxalic acid required to neutralise 1000 mL of normal solution of NaOH is:
a) 126 g
b)63 g
c) 6.3 g
d)12.6 g
12. The number of hydrogen atoms present in 25.6 g of sucrose(C12H22O11) which has a molar mass of 342.3 g is
a) 22 × 1023 H atoms
b)9.91 × 1023 H atoms
c) 11 × 1023 H atoms
d)44 × 1023 H atoms
13. Molarity of liquid HCl with density equal to 1.17 g/mL is:
a) 36.5
b)18.25
c) 32.05
d)4.65
14. If 20 mL of 0.4 N NaOH solution completely neutralizes 40 mL of a dibasic acid, the molarity of the acid solution is:
a) 0.1 M
b)0.2 M
c) 0.3 M
d)0.4 M
15. Dissolving 120 g of urea (mol.wt.60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is:
a) 1.78 M
b)2.00 M
c) 2.05 M
d)2.22 M
16. Equivalent weight of NH3 as a base is:
a) 17
b)17/3
c) 1.7
d)17/2
17. KMnO4 reacts with oxalic acid according to the equation
2MnO―4 +5C2O2―4 +16H+→2Mn2+ +10CO2 +8H2O
Here, 20 mL of 0.1 M KMnO4 is equivalent to
a) 20 mL of 0.5 M H2C2O4
b)50 mL of 0.1 M H2C2O4
c) 50 mL of 0.1 M H2C2O4
d)20 mL of 0.1 M H2C2O4
18. To prepare a standard solution of a substance, we use:
a) A pipette
b)A burette
c) Measuring flask
d)Measuring cylinder
19. There are two isotopes of an element with atomic mass z. Heavier one has atomic mass z + 2 and lighter one has z ―1, the abundance of lighter one is
a) 66.6%
b)69.7%
c) 6.67%
d)33.3%
20. 3 g of an oxide of a metal is converted to chloride completely and it yielded 5 g of chloride. The
equivalent weight of the metal is
a) 33.25
b)3.325
c) 12
d)20
Answer Key
1- D , 2- A, 3- B, 4-D , 5-B, 6-B, 7-C, 8-A, 9-A, 10-B,
11-B, 12-B, 13-C, 14-A, 15-C, 16-A, 17-B, 18-C, 19-A, 20-A
READ 👉👉👉 SOME BASIC CONCEPTS OF CHEMISTRY PART-6
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