The break down of molecular ions from natural productsgive important information about?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following represents Empirical Formula of Glucose?

The _____ study of composition of pure substance in 17th century clearly shows that few elements are components of many substances

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

An atom is composed of electrons, protons, neutrons and ___.

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Mass of an atom ranges from?

PMC Practice 20
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Chemical properties of an atom depends upon number of

Chemical equations do not tell about the ______ because of certain limitations.

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The smallest number of molecules are present in?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

In combustion analysis method CO2 is absorbed by?

X-ray work in 20th century shows that diameter of the atoms are of the order?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

To find the number of molecules in a given compound which of the following is employed?

Spectrometry is used when reactants and products absorb _____.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Isotopes are the atoms of same element having different number of _____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A compound has an empirical (simple) formula, C2H2O. If the experimental molecular weight is found to be in the range 160-170, the molecular formula of this compound is:

(Atomic weight: C = 12.1, H = 1.008, O = 16).

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

If you need to produce carbon dioxide from 12 grams of carbon, how many grams would you need?

Different kinds of atoms of the same element are called isotope having different __________but same ___________ properties.

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

0.5 mole of SO2 contains gram of oxygen?

A sample of 0.7 moles of metal ‘M’ reacts completely with an excess of fluorine to form 45 g of MF2. How many moles of F are present in it?

PMC Practice 17
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Mass spectrometer can be used to find:

A mole of a substance contains _____ particles.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Limiting reactant controls the amount of _.

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

In which of the following will water evaporate earlier?

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

In mass spectrometry, ionization occurs in form.

How many moles of S02 contain 16 grams of oxygen?

Natural gas in homes burns in excess of oxygen, what is the limiting reactant in this case?

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The total number of neutrons in 5g of H2O are:

1 NA = 6.023 x 1023

PMC Practice 18
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

If 9.8 g of sulfuric acid is dissolved in excess quantity of water, it will yield ____ moles of hydrogen ion (H+) and _____ moles of sulphate ions (SO42-).

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The unit used to express the relative atomic mass is called

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Avogadro’s constant is the number of:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The number of neutrons in H2SO4 are ____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Molecular formula = n (Empirical formula). What does “n” represents in this

What is the mass of 10^-3 moles of MgSO4?

4 gram atoms of carbon has a mass of:

Solution contains 85.5 g of sucrose (C12H22O11) in 250 cm3. What is its molarity?

UHS 2019
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Formula mass is considered for compounds instead of their molecular mass.

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following statement about Avogadro’s hypothesis is correct?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The mass number of an atom is:

PMC 2021 Tested
Chemistry
Fundamental Principles of Organic Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

If the number of molecules of different gases are the same at S.T.P., the occupied volume will be _____.

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

_______ is a macromolecule found in blood.

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following has six isotopes?

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

How many significant figures are there in 0.4793?

NTS 2018
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Molecular ions are produced by passing a high energy electron beam or an x-ray beam through _______.

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following molecule is expressed in empirical formula:

If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield _______ moles of hydrogen ion ( H+) and _______ mole of sulphate ions (SO4 -2).

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

1 amu is?

The atoms of hemoglobin is heavier than H-atoms

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

) Which one of the following has no isotope

Which of the following will react with water?

NUMS 2016
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

How many molecules are there in 2.1 moles of CO₂:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Actual yield is always less than theoretical yield due to

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

One mole of Oxygen has number of atoms as compared to one mole of Nitrogen

Actual yield is always experimental yield.

One mole of substance at STP has:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Stoichiometry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

2 moles of octane ( C8H18) burn with 25 moles of oxygen (02) and produced __ moles of carbon dioxide along with 18 moles of water.

PMC Practice 20
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The unit used to express the relative atomic mass is called?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following has six isotopes?

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

What is the percentage by mass of Nitrogen in NH4(NO3)?

If we are given the mass of a substance ,we can calculate the_______ of the other substance with the help of a balanced chemical equation.

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The efficiency of a chemical reactions can be checked by calculating ________ yield.

PMC Practice 30
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

It is the fact that 22.414 cm3 of any gas has a different masses but the same number of

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Actual yield is always less than theoretical yield due to

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

If 9.8 g of sulfuric acid is dissolved in excess quantity of water, it will yield ____ moles of hydrogen ion (H+) and ____ mole of sulphate ions (SO4-2).

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

In the ion-electron method of balancing equations, how oxygen is balanced?

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Mass of a neutron in amu is?

Find the mass in grams of 1.69 mol of phosphoric acid.

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Mass spectrometer is used to determine which of the following quantity?

The relative abundance of isotopes of elements are measured by?

PMC Practice 11
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Physical and chemical properties of an element depend upon

27 g of Al will react with how much mass of O2 to produce Al2O3?

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

What will be the mass in grams of 12 gram atom of carbon atoms?