JEE Main 2021 (Online) 25th February Morning Shift | Some Basic Concepts of Chemistry Question 128 | Chemistry

Complete combustion of 1.80 g of an oxygen containing compound (C_xH_yO_z) gave 2.64 g of CO₂ and 1.08 g of H₂O. The percentage of oxygen in the organic compound is :

51.63

50.33

63.53

53.33

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

-1

The average molar mass of chlorine is 35.5 g mol^–1. The ratio of ³⁵Cl to ³⁷Cl in naturally occuring chlorine is close to :

1 : 1

2 : 1

3 : 1

4 : 1

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

A solution of two components containing n₁ moles of the 1^st component and n₂ moles of the 2^nd component is prepared. M₁ and M₂ are the molecular weights of component 1 and 2 respectively. If d is the density of the solution in g mL^–1, C₂ is the molarity and x₂ is the mole fraction of the 2^nd component, then C₂ can be expressed as :

$${C_2} = {{1000{x_2}} \over {{M_1} + {x_2}\left( {{M_2} - {M_1}} \right)}}$$

$${C_2} = {{1000d{x_2}} \over {{M_1} + {x_2}\left( {{M_2} - {M_1}} \right)}}$$

$${C_2} = {{d{x_2}} \over {{M_1} + {x_2}\left( {{M_2} - {M_1}} \right)}}$$

$${C_2} = {{d{x_1}} \over {{M_1} + {x_2}\left( {{M_2} - {M_1}} \right)}}$$

JEE Main 2020 (Online) 3rd September Evening Slot

MCQ (Single Correct Answer)

-1

The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively, are: (Take molar mass of hydrogen peroxide as 34 g/mol)

0.85 and 0.5

0.85 and 0.25

1.7 and 0.25

1.7 and 0.5

PREVIOUS NEXT

Questions Asked from Some Basic Concepts of Chemistry (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions