NCERT MCQ CLASS-11 CHAPTER-1 | CHEMISTRY NCERT MCQ | | CHEMISTRY PART 1 | | SOME BASIC CONCEPTS OF CHEMISTRY | EDUGROWN

In This Post we are  providing Chapter-1 Some Basic Concepts of Chemistry NCERT MCQ for Class 11 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON SOME BASIC CONCEPTS OF CHEMISTRY

Question 1.
What will be the volume of mixture after the reaction

(a) 1.5 L
(b) 0.5 L
(c) 1 L
(d) 0.0 L

Answer: (b) 0.5 L

Question 2.
A compound has hemoglobin like structure, it has only one Fe. It contains 4.6% of Fe. The approximate molecular mass is
(a) 100 g mol^-1
(b) 1200 g mol^-1
(c) 1400 g mol^-1
(d) 1600 g mol^-1

Answer: (b) 1200 g mol^-1

Question 3.
How much of NaOH is required to neutralize 1500 cm³ of 0.1 NHCl?
(a) 40 g
(b) 4 g
(c) 6 g
(d) 60 g

Answer: (c) 6 g

Question 4.
10 dm³ of N₂ gas and 10 dm³ of gas X at the same temperature contains the same number of molecules. The gas X is
(a) CO
(b) CO₂
(c) H₂
(d) NO

Answer: (a) CO

Question 5.
The percentage of nitrogen in urea is about
(a) 46
(b) 85
(c) 18
(d) 28

Answer: (a) 46

Question 6.
The modem atomic weight scale is based upon
(a) ¹²C
(b) ¹²O₈
(c) ¹H
(d) ¹³C

Answer: (a) ¹²C

Question 7.
The prefix 10¹⁸ is
(a) giga
(b) exa
(c) kilo
(d) nano
(e) mega

Answer: (b) exa

Question 8.
Number of atoms in 558.6 g Fe (Molar mass Fe = 55.86 g mol^-1) is
(a) twice that in 60 g carbon
(b) 6.023 × 10²²
(c) half that of 8g He
(d) 558.6 × 6.023 × 10²³

Answer: (a) twice that in 60 g carbon

Question 9.
Number of grams of oxygen in 32.2 g Na₂SO₄.10 H₂O is
(a) 20.8
(b) 22.4
(c) 2.24
(d) 2.08

Answer: (b) 22.4

Question 10.
250 ml of a sodium carbonate solution contains 2.65 grams of Na₂CO₃. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. wt. of Na₂CO₃ = 106)
(a) 0.1 M
(b) 0.001 M
(c) 0.01 M
(d) 10^-4 M

Answer: (b) 0.001 M

Question 11.
An aqueous solution of 6.3 g of oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 N NaOH required to completely neutralize 10 ml of this solution is
(a) 40 ml
(b) 20 ml
(c) 10 m
(d) 4 ml

Answer: (a) 40 ml

Question 12.
How many moles of electrons weight one kilogram?
(a) 6.023 × 10²³
(b) 19.108 × 10³¹
(c) 6023×10549.108
(d) 9.108 × 10⁸

Answer: (d) 9.108 × 10⁸

Question 13.
One mole of calcium phosphide on reaction with excess of water gives
(a) One mole of phosphine
(b) Two moles of phosphoric acid
(c) Two moles of phosphine
(d) One mole of phosphorous pentoxide

Answer: (c) Two moles of phosphine

Question 14.
Which has maximum number of atoms?
(a) 24 g of C (12)
(b) 56 g of Fe (56)
(c) 27 g of Al (27)
(d) 108 g of Ag (108)

Answer: (a) 24 g of C (12)

Question 15.
Mixture X = 0.02 mol of [CO(NH₃)₅ SO₄] Br and 0.02 mol of [CO(NH₃)₅ Br] SO₄ was prepared in 2 liters of a solution.
1 liter of mixture X + excess of AgNO₃ → Y
1 liter of mixture X + excess of BaCl₂ → Z
Number of moles of Y and Z are
(a) 0.01, 0.01
(b) 0.02, 0.01
(c) 0.01, 0.02
(d) 0.02, 0.02

Answer: (a) 0.01, 0.01

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