Assertion and Reason Structure of Atom Part 4

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Q (1): Assertion : Atomic mass is always concentrated inside the nucleus.

Reason : Electrons are always revolved around nucleus.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (2): Assertion : Atomic mass is always concentrated inside the nucleus.

Reason : Protons are always embedded inside the nucleus.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (3): Assertion : The sum of proton no. and neutron no. gives us atomic mass number of atom.

Reason : Proton no. and neutron no. is always same.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (4): Assertion : Thomson’s says that atoms consist of positively charged sphere and the electrons are embedded in it.

Reason : Negatively charged ions always spread inside the core of atoms.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (5): Assertion : According to Rutherford’s experiment alpha particles are not deflected more than proton.

Reason : Alpha particles are more fragile in nature.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (6): Assertion : According to Rutherford’s experiment alpha particles are not deflected more than proton.

Reason : Alpha particles are heavier than neutron particles hence they deflect less.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (7): Assertion : According to Rutherford’s most of the space inside the atom is empty.

Reason : Alpha particles passed through the gold foil without getting deflected.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (8): Assertion : According to Rutherford’s very few particles were deflected from their path.

Reason : Most of the positive charge of the atoms occupies very little space.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (9): Assertion : According to Rutherford’s very few particles were deflected from their path.

Reason : Alpha particles passed through the gold foil without getting deflected.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (10): Assertion : The size of the nucleus is very small as compared to the size of the atom.

Reason : Proton and neutron present inside the nucleus.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (11): Assertion : The size of the nucleus is very small as compared to the size of the atom.

Reason : The sum of proton and neutron gives us atomic mass number.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (12): Assertion : Atomic mass of carbon is 12.

Reason : Carbon has 6 neutron number and 6 proton number.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (13): Assertion : L-shell contain eight electrons.

Reason : L-shell comes after the M shell.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (14): Assertion : L-shell contain eight electrons.

Reason : L-shell comes after the K shell.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

Q (15): Assertion : Electrons revolve around the nucleus with different orbits.

Reason : Electrons have different- different energy hence they revolve separately.

1 point

( a) Both A and R are true and R is the correct explanation of A.

( b) Both A and R are true but R is not the correct explanation of A.

( c) A is true but R is false.

( d) A is false but R is true.

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