JEE Main 2021 (Online) 25th February Morning Slot | Some Basic Concepts of Chemistry Question 94 | Chemistry

JEE Main 2021 (Online) 25th February Morning Slot

MCQ (Single Correct Answer)

-1

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) 7th January Evening Slot

MCQ (Single Correct Answer)

-1

The ammonia (NH₃) released on quantiative reaction of 0.6 g urea (NH₂CONH₂) with sodium hydroxide (NaOH) can be neutralized by :

200 ml of 0.02 N HCl

100 ml of 0.2 N HCl

100 ml of 0.1 HCl

200 ml of 0.4 N HCl

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

-1

Amongst the following statements, that which was not proposed by Dalton was :

Matter consists of indivisible atoms all the atoms of a given element have.

Chemical reactions involve reorganization of atoms. These are neither created not destroyed in a chemical reaction.

When gases combine or reproduced in a chemical reactionn they do so in a simple ratio by volume provided all gases are the same T & P.

Identical properties including identical mass. Atoms of differemt element differ in mass.

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