Question # 1

Combustion analysis is performed for the determination of

Choose an answer

Molar mass of the compound

Empirical formula of the compound

Structural formula of the substance

Mass of halogens present in organic compounds

Gram atoms of hydrogen in 5.5 g H2

Choose an answer

5.50

2.25

5.45

2.20

Mg(s) + 2HCI(aq). ------------ MgCl2(aq)+ H2(g)

Given that; Mg=21g and HCI=21g, the excess reactant is

Choose an answer

Mg

HCI

Both are in stoichiometric amounts

None of these

In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is

Choose an answer

1/3

1/5

2/3

5/6

Molecular ions are produced in mass spectrometer. Which type of molecular ion formed more abundantly.

Choose an answer

Negatively charged

H⁺ ions

Positively charged

equal positive and negative ions

The largest number of molecules are present in

Choose an answer

3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

One mole of SO2 contains

Choose an answer

6.022 x 10(23) atoms of oxygen

6.022x 10 ê23 atoms of sulfur

18.1x 10 (23) molecules of SO2

4 g molecule of SO2

Water may boil at 120 °C when external pressure is:

Choose an answer

100 mm of Hg

700 mm of Hg

760 mm of Hg

1489 mm of Hg

Moles of protons in 20g of SO3

Choose an answer

10

20

40

80

The sole produets of combustion analysis are

Choose an answer

CO2 and NH3

H2O and Mg(CIO4)2

CO2 and KOH

CO2 and H2O

More Classes

Other Links

MDCAT Chemistry Chapter 1 Introduction to fundamental concepts of chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer