MCQ’s Chapter 1

MCQ: A mixture that consists of different components is called

  1. homogeneous mixture
  2. heterogeneous mixture
  3. mixture
  4. none of above

Answer 

MCQ: Free radicals are electrically

  1. positively charged
  2. negatively charged
  3. can be both A and B
  4. neutral

Answer 

MCQ: Empirical formula for water is

  1. CO2
  2. HO
  3. H2
  4. H2O

Answer 

MCQ: Hair contains keratin proteins which are also present in nails and wool is an example of

  1. Biochemistry
  2. Inorganic chemistry
  3. Physical chemistry
  4. none of above

Answer 

MCQ: Natural force that holds together elements together is called

  1. chemical bond
  2. force of attraction
  3. gravitational force
  4. physical bond

Answer 

MCQ: If 9.05 moles of ozone is formed in a storm then mass of ozone is

  1. 435g
  2. 450g
  3. 434.4g
  4. 480g

Answer 

MCQ: Ca on loosing 2 electrons becomes

  1. Ca-2
  2. Ca-1
  3. Ca+2
  4. Ca-2

Answer 

MCQ: Biochemistry deals with

  1. physical changes in humans
  2. chemical changes in humans
  3. A and B both
  4. physical and chemical changes in living organisms

Answer 

MCQ: Mass number of an atom is

  1. no. of protons
  2. no. of neutrons
  3. A and B both
  4. no. of electrons

Answer 

MCQ: A mole of any substance contains

  1. 6.022 * 1022 particles
  2. 6.022 * 1023 particles
  3. 6.022 * 1024 particles
  4. 6.022 * 1025 particles

Answer 

MCQ: Relative atomic mass of Na is

  1. 1.008 amu
  2. 22.9898 amu
  3. 26.9815 amu
  4. 15.9994 amu

Answer 

MCQ: Mass of an atom relative to C-12 is

  1. atomic mass
  2. atomic number
  3. nucleon number
  4. relative atomic mass

Answer 

MCQ: Over 70% of earth’s crust is covered with

  1. water
  2. land
  3. coal
  4. trees

Answer 

MCQ: List which contains only elements is

  1. air, water, oxygen
  2. Hydrogen, oxygen, brass
  3. Air, water, fire, earth
  4. Calcium, Sulphur, carbon

Answer 

MCQ: Formula mass indicates simplest ration between

  1. cations
  2. anions
  3. A and B both
  4. atoms

Answer 

MCQ: Smallest part of an element that cannot exist as a free state is

  1. ion
  2. charge
  3. atom
  4. molecule

Answer 

MCQ: A free radical has

  1. unpaired electrons
  2. paired electrons
  3. no electrons
  4. even no. of electrons

Answer 

MCQ: Branch of chemistry dealing with plantation and overcoming greenhouse effect is

  1. Biochemistry
  2. Organic chemistry
  3. Environmental chemistry
  4. Inorganic chemistry

Answer 

MCQ: 1 mole of substance refers to

  1. molar mass
  2. atomic mass
  3. electron mass
  4. neutron mass

Answer 

MCQ: Number of protons in nucleus constitute it’s

  1. atomic mass
  2. atomic number
  3. nucleon number
  4. number of neutrons

Answer 

MCQ: Compounds have atoms of

  1. same sizes
  2. different sizes
  3. same electrons
  4. different electrons

Answer 

MCQ: An oxide ion has -2 charge because

  1. oxygen looses two electrons
  2. oxygen gains two electrons
  3. oxygen becomes neutral
  4. none of above

Answer 

MCQ: Vinegar contains

  1. 10% acetic acid
  2. 5%acetic acid
  3. 7% acetic acid
  4. 8% acetic acid

Answer 

MCQ: Molecular formula gives

  1. simplest ratio of atoms
  2. actual whole number ratio of atoms
  3. whole number ratio of atoms
  4. natural number ratio of atoms

Answer 

MCQ: 6.022 * 1023 atoms of Sulphur contains

  1. 2 moles
  2. 3 moles
  3. 4 moles
  4. 1 mole

Answer 

MCQ: An ionic compound is electrically

  1. neutral
  2. positively charged
  3. negatively charged
  4. none of above

Answer 

MCQ: Gram molecular mass of C6H12O6 is

  1. 18.016g
  2. 180.096g
  3. 58.5g
  4. 70g

Answer 

MCQ: In glucose simplest ratio between C, H and O is

  1. 2:01:03
  2. 3:02:01
  3. 1:02:01
  4. 3:04:01

Answer 

MCQ: Formula mass of NaCl is

  1. 57.5 amu
  2. 58.5 amu
  3. 59.5 amu
  4. 60.0 amu

Answer 

MCQ: Species present in a substance refers to

  1. atoms
  2. ions
  3. molecules
  4. representative particles

Answer 

MCQ: If one mole of carbon contains x atoms then number of atoms in 12g of Mg are

  1. x
  2. 0.5x
  3. 2x
  4. 1.5x

Answer 

MCQ: A science that examines material this universe contain and changes in them is called

  1. Chemistry
  2. Physics
  3. Biology
  4. Geography

Answer 

MCQ: Molecular mass of glucose is

  1. 180.096 amu
  2. 190.096 amu
  3. 181.096 amu
  4. 130.096 amu

Answer 

MCQ: Negatively charged ions are called

  1. cations
  2. anions
  3. ion
  4. none of above

Answer 

MCQ: Number of atoms of hydrogen in 2 moles of NH3

  1. 5 * 1023
  2. 3.01 * 1023
  3. 3.61 * 1024
  4. 4 * 1023

Answer 

MCQ: Number of atoms in 5 moles of nitrogen atom is

  1. 3.01 * 1024
  2. 4.1 * 1030
  3. 3.9 * 1032
  4. 5 * 1056

Answer 

MCQ: Branch of chemistry which deals with substance containing carbon is called

  1. carbon chemistry
  2. inorganic chemistry
  3. organic chemistry
  4. environmental chemistry

Answer 

MCQ: Mass of 1 mole of sucrose is

  1. 320g
  2. 342g
  3. 341g
  4. 340g

Answer 

MCQ: Matter is anything that occupies

  1. space
  2. has mass
  3. A and B both
  4. none of above

Answer 

MCQ: Formula which gives simplest whole number ratio of atoms is

  1. empirical formula
  2. molecular formula
  3. chemical formula
  4. none of above

Answer 

MCQ: Mass of carbon present in 44g of carbon dioxide is

  1. 12g
  2. 6g
  3. 24g
  4. 44g

Answer 

MCQ: Substance which has formula mass of 133.5 amu is

  1. MgCl2
  2. S2Cl2
  3. BCl3
  4. AlCl3

Answer 

MCQ: Cookies and bread rise due to

  1. conversion of washing soda into CO2
  2. conversion of H2O in to CO2
  3. conversion of baking soda into O2
  4. conversion of baking soda in to CO2

Answer 

MCQ: A free radical has

  1. odd no. of electrons
  2. even no. of electrons
  3. A and B both
  4. none of above

Answer 

MCQ: When halogens are exposed to sunlight, they split up in to

  1. atoms
  2. ions
  3. radicals
  4. molecules

Answer 

MCQ: Gram atomic mass of Zn is

  1. 23g
  2. 12g
  3. 63.54g
  4. 56.67g

Answer 

MCQ: A substance whose all atoms have same atomic number is

  1. molecule
  2. atom
  3. element
  4. ion

Answer 

MCQ: A hydrogen atom is

  1. 8.40% as massive as C-12
  2. 10% as massive as C-12
  3. 20% as massive as C-12
  4. 30% as massive as C-12

Answer 

MCQ: A balloon filled with 5g of hydrogen contains

  1. 2.48 moles of H2
  2. 3.48 moles of H2
  3. 4.48 moles of H2
  4. 5 moles of H2

Answer 

MCQ: Number of protons and neutrons in nucleus if atomic number of element is 17 and mass number is 35, is

  1. 17 and 18
  2. 17 and 19
  3. 17 and 20
  4. 17 and 21

Answer