NCERT Exemplar Problems Class 9 Science – Sound Question 1: Note is a sound (a) of mixture of several frequencies (b) of mixture of two frequencies only (c) of a single frequency (d) always unpleasant to listen Answer: (a) The sound which is produced due to a mixture of several frequencies is called a note…
Read more
NCERT Exemplar Problems Class 9 Science – Work and Energy Question 1: When a body falls freely towards the earth, then its total energy (a) increases (b) decreases (c) remains constant (d) first increases and then decreases Answer: (c) Since, total energy of the system is always conserved, so when a body falls freely towards…
Read more
NCERT Exemplar Problems Class 9 Science – Gravitation Question 1: Two objects of different masses falling freely near the surface of moon would (a) have same velocities at any instant (b) have different accelerations (c) experience forces of same magnitude (d) undergo a change in their inertia Answer: (a) Objects of different masses falling freely…
Read more
NCERT Exemplar Problems Class 9 Science – Force and Laws of Motion Question 1: Which of the following statement is not correct for an object moving along a straight path in accelerated motion? (a) Its speed keeps changing (b) Its velocity always changes (c) It always goes away from the earth (d) A force is…
Read more
NCERT Exemplar Problems Class 9 Science – Motion Question 1: A particle is moving in a circular path of radius r. The displacement after half a circle would be (a) zero (b) nr (c) 2r (d) 2nr Answer: (c) Given, after half the circle, the particle will reach the diametrically opposite point i.e., from point…
Read more
NCERT Exemplar Problems Class 9 Science – Diversity in Living Organisms Question 1: Find out incorrect sentence (a) Protista includes unicellular eukaryotic organisms (b) Whittaker considered cell structure,mode and source of nutrition for classifying the organisms in five kingdoms (c) Both Monera and Protista may be autotrophic and heterotrophic (d) Monerans have well defined nucleus…
Read more
NCERT Exemplar Problems Class 9 Science – Tissues Question 1: Which of the following tissues has dead cells? (a) Parenchyma (b) Sclerenchyma (c) Collenchyma (d) Epithelial tissue Answer: (b) Sclerenchyma cells are the permanent tissues present in the plants. They provide hardness and stiffness to the plant and are composed of dead cells. This tissue…
Read more
NCERT Exemplar Problems Class 9 Science – The Fundamental Unit of Life Question 1: Which of the following can be made into crystal? (a) A bacterium (b) An Amoeba (c) A virus (d) A sperm Answer: (c) Viruses are considered as an intermediate between living and non-living cells because they cannot metabolise and reproduce on…
Read more
NCERT Exemplar Problems Class 9 Science – Structure of the Atom Question 1: Which of the following correctly represent the electronic distribution in the Mg atom? (a) 3, 8,1 (b) 2, 8, 2 (c) 1,8, 3 (d) 8, 2, 2 Answer: (b) Atomic number and the number of electrons in magnesium atom is 12.…
Read more
NCERT Exemplar Problems Class 9 Science – Atoms and Molecules Question 1: Which of the following correctly represents 360 g of water? (i) 2 moles of H20 (ii) 20 moles of water (iii) 022 x 1023 molecules of water (iv) 12044 x 1025 molecules of water (a) only (i) (b) (i) and (iv) (c) (ii)…
Read more