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MCQOPTIONS
This section includes 1777 Mcqs, each offering curated multiple-choice questions to sharpen your 9th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1601. |
Which of the following substances is present in the cell walls of sclerenchyma? |
| A. | Cellulose |
| B. | Pectin |
| C. | Lignin |
| D. | Hemicellulose |
| Answer» D. Hemicellulose | |
| 1602. |
The matrix of bone is in the form of thin concentric rings, called _____. Bone cells, called ____ are present in fluid-filled spaces called ____. These fluid filled spaces of the bone communicate with each other by network of fine canals, called ____.Select the correct sequence of words to complete the above passage. |
| A. | Lacunae, Osteoblasts, Lamellae, Canaliculi. |
| B. | Lamellae, Osteocytes, Lacunae, Canaliculi |
| C. | Lamellae, Chondrocytes, Canaliculi, Lacunae |
| D. | Lacunae, Adipocytes, Canaliculi, Sarcoplasm |
| Answer» C. Lamellae, Chondrocytes, Canaliculi, Lacunae | |
| 1603. |
Mohit was asked to draw a labelled diagram of sclerenchyma tissue as seen in longitudinal section. The figure he drew is shown here. Point out the mistake in the figure. |
| A. | Instead of simple pit pore, it should be bordered pit. |
| B. | The cell walls are not lignified in sclerenchyma. |
| C. | The nucleus and cytoplasm are not shown. |
| D. | The figure shows transverse section instead of longitudinal section of tissue. |
| Answer» E. | |
| 1604. |
Which of the following are incorrectly matched? (i) Adipose tissue Fat storage (ii) Stratified epithelium Skin (iii) Areolar tissue Packaging tissue (iv) Squamous epithelium Kidney tubules (v) Cardiac muscle Branched and multinucleate (vi) Striated muscle Unbranched and unicucleate |
| A. | (v) and (vi) only |
| B. | (ii), (iv) and (vi) only |
| C. | (iii) and (iv) only |
| D. | (iii) and (v) only |
| Answer» B. (ii), (iv) and (vi) only | |
| 1605. |
The velocity of a particle increases from u to v in a time t during which the particle has a uniform acceleration, which of the following equation apply to the motion? |
| A. | \[S=v\times t\] |
| B. | \[2s=(u+v)\times t\] |
| C. | \[a=\frac{v-u}{t}\] |
| D. | \[{{v}^{2}}={{u}^{2}}+2as\] |
| Answer» D. \[{{v}^{2}}={{u}^{2}}+2as\] | |
| 1606. |
Ramu rides on a cycle in a park of radius 1km. If he takes 3.5 rounds of the park, what is the magnitude of displacement and the total distance covered by Ramu? |
| A. | 22 km and 2 km |
| B. | 44 km and 4 km |
| C. | 3.5 km and 2 km |
| D. | 4.2 km and 5 km |
| Answer» B. 44 km and 4 km | |
| 1607. |
When the distance an object travels is directly proportional to the length of time, it is said to travel with |
| A. | Constant speed |
| B. | Zero velocity |
| C. | Constant acceleration |
| D. | Uniform velocity |
| Answer» B. Zero velocity | |
| 1608. |
Two paper screens A and B are separated by a distance of 100 m. A bullet pierces A and then B. The hole in B is 10 cm below the hole in A. If the bullet is travelling horizontally at A, calculate the velocity of the bullet at A. Neglect the resistance of paper in air. |
| A. | 100 m/sec |
| B. | 400 m/sec |
| C. | 550 m/sec |
| D. | 700 m/sec |
| Answer» E. | |
| 1609. |
A grasshopper can jump a maximum horizontal distance of 0.2 m. If he spends negligible time on ground, with what speed can he travel along the road? |
| A. | 1 m/s |
| B. | 2 m/s |
| C. | 3 m/s |
| D. | 4 m/s |
| Answer» B. 2 m/s | |
| 1610. |
Which of the following is not vector quantity? |
| A. | Retardation |
| B. | Acceleration due to gravity |
| C. | Average speed |
| D. | Displacement |
| Answer» D. Displacement | |
| 1611. |
A stone of mass 1 kg tied to a light inextensible 10 string of length, L = \[\frac{10}{3}\]m is whirling in a circular 0 path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum is 4 and if g is taken to be 10\[\text{m}/{{\text{s}}^{\text{2}}}\], then speed of stone at the highest point of the circle is |
| A. | 20 m / s |
| B. | \[10\sqrt{3}m/s\] |
| C. | \[50\sqrt{2}m/s\] |
| D. | 10 m / s |
| Answer» D. 10 m / s | |
| 1612. |
A particle moving with an initial velocity of \[5\,\,m\,\,{{s}^{-1}}\] is subjected to a uniform acceleration of\[-2.5\,\,m\,\,{{s}^{-2}}\]. Find the displacement in the next \[4\] seconds. |
| A. | \[40\,\,m\] |
| B. | \[0\,\,m\] |
| C. | \[20\,\,m\] |
| D. | \[60\,\,m\] |
| Answer» C. \[20\,\,m\] | |
| 1613. |
N \[\text{k}{{\text{g}}^{\text{-1}}}\]is the unit of |
| A. | Retardation |
| B. | Acceleration |
| C. | Rate of change of velocity |
| D. | All of! These |
| Answer» E. | |
| 1614. |
A body covers 200 cm in the first 2 sec. and 220 cm in next 4 sec. What is the velocity of the body at the end of 7th second? |
| A. | 40 cm/sec |
| B. | 20 cm/sec |
| C. | 10 cm/sec |
| D. | 5 cm/sec |
| Answer» D. 5 cm/sec | |
| 1615. |
A particle is pushed along a horizontal surface in such a way that it starts with a velocity of\[12\,\,m\,\,{{s}^{-1}}\], and decreases at the rate of\[0.5\,\,m\,\,{{s}^{-2}}\]. Find the time it will take to come to rest. |
| A. | \[6s\] |
| B. | \[12s\] |
| C. | \[24s\] |
| D. | \[48s\] |
| Answer» D. \[48s\] | |
| 1616. |
An electron starting from rest has a velocity that increases linearly with time, i.e. \[u=kt\], where k = (2 m/s)/s. The distance covered in the first three second will be |
| A. | 36m |
| B. | 27m |
| C. | 18 m |
| D. | 9 m |
| Answer» E. | |
| 1617. |
Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball 6 is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B, it has the same. |
| A. | Position and velocity as ball B |
| B. | Position and acceleration as ball B |
| C. | Velocity and acceleration as ball B |
| D. | Displacement and velocity as ball B |
| Answer» C. Velocity and acceleration as ball B | |
| 1618. |
A particle is moving in a straight line with initial velocity u and uniform acceleration a. If the sum of the distances travelled in \[{{t}^{th}}\] and\[{{(t+1)}^{th}}\]seconds is 100 cm, then its velocity after\[t\] seconds in \[cm\text{ }{{s}^{1}}\] is |
| A. | 20 |
| B. | 30 |
| C. | 50 |
| D. | 80 |
| Answer» D. 80 | |
| 1619. |
A body starts from rest and moves with a uniform acceleration. The ratio of the distance covered in the \[{{n}^{th}}\] second to distance covered in n seconds is |
| A. | \[\frac{2}{n}-\frac{1}{{{n}^{2}}}\] |
| B. | \[\frac{1}{{{n}^{2}}}-\frac{1}{n}\] |
| C. | \[\frac{2}{{{n}^{2}}}-\frac{1}{n}\] |
| D. | \[\frac{2}{n}-\frac{1}{{{n}^{2}}}\] |
| Answer» B. \[\frac{1}{{{n}^{2}}}-\frac{1}{n}\] | |
| 1620. |
The graph below shows the distance travelled and the time taken by four cars. Which car travelled the slowest? |
| A. | Car 1 |
| B. | Car 2 |
| C. | Car 3 |
| D. | Car 4 |
| Answer» E. | |
| 1621. |
A person travels along a straight road for the first I half length with a velocity \[{{u}_{1}}\] and the second half length with a velocity \[{{u}_{2}}\]. Then the mean velocity y is given by |
| A. | \[u=\frac{{{u}_{1}}+{{u}_{2}}}{2}\] |
| B. | \[u=\sqrt{{{u}_{1}}{{u}_{2}}}\] |
| C. | \[u=\sqrt{\frac{{{u}_{1}}}{{{u}_{2}}}}\] |
| D. | \[\frac{2}{u}=\frac{1}{{{u}_{1}}}+\frac{1}{{{u}_{2}}}\] |
| Answer» E. | |
| 1622. |
A body goes from A to B with a velocity of 20 m/s and comes back B to A with a velocity of 30 m/s. The average velocity of the body during the whole journey is |
| A. | zero |
| B. | 24 m/s |
| C. | 25 m/s |
| D. | none of these |
| Answer» C. 25 m/s | |
| 1623. |
The velocity-time graph of an object is shown in the figure. Identify the correct statement(s) regarding this graph. (i) This is a non uniform velocity-time graph of the object. (ii) The velocity of the object is increasing at the same rate during OP and QR. (iii) The velocity of the object is decreasing at same rate during PQ and RT. |
| A. | Only (i) is correct. |
| B. | Only (ii) is correct. |
| C. | Only (iii) is correct. |
| D. | All (i), (ii) and (iii) are correct. |
| Answer» B. Only (ii) is correct. | |
| 1624. |
The velocity of a particle increases from u to v in a time t during which the particle has a uniform acceleration. Which of the following equations applies to the motion? |
| A. | \[2s=(u+v)\times t\] |
| B. | \[a=\frac{V-u}{t}\] |
| C. | \[{{v}^{2}}={{u}^{2}}+2as\] |
| D. | \[s\text{ }=\text{ }v\text{ }\times \text{ }t\] |
| Answer» C. \[{{v}^{2}}={{u}^{2}}+2as\] | |
| 1625. |
Read the given statements and select the correct option. Statement 1: A body thrown vertically up with a velocity u reaches the maximum height h after T seconds. At a time 2T seconds its velocity becomes zero. Statement 2: A particle thrown vertically up with a velocity comes back to its initial position with same magnitude of velocity but in opposite direction. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Statement 1 is false but statement 2 is true. |
| Answer» E. | |
| 1626. |
A particle is moving along a circular track of radius 1 m with uniform speed. Find the ratio of the distance covered and the displacement in half revolution. |
| A. | \[1:1\] |
| B. | \[0:1\] |
| C. | \[\pi :1\] |
| D. | \[\pi :2\] |
| Answer» E. | |
| 1627. |
If the displacement-time graph for the two particles A and B ^ire straight lines inclined at angles of \[30{}^\circ \] and \[60{}^\circ \] with the time axis, then ratio of the velocities \[{{u}_{A}}:{{u}_{B}}\] Up will be |
| A. | 0.0430555555555556 |
| B. | \[1:\sqrt{3}\] |
| C. | \[\sqrt{3}:1\] |
| D. | 1:3 |
| Answer» E. | |
| 1628. |
The velocity of a body is given by the equation\[v=6-0.02\,\,t\], where \[t\] is the time taken. What does the body undergo? |
| A. | Uniform retardation of\[0.02\,\,m\,\,{{s}^{-2}}\] |
| B. | Uniform acceleration of\[0.02\,\,m\,\,{{s}^{-2}}\] |
| C. | Uniform retardation of\[-0.04\,\,m\,\,{{s}^{-2}}\] |
| D. | Uniform acceleration of \[-0.04\,\,m\,\,{{s}^{-2}}\] |
| Answer» B. Uniform acceleration of\[0.02\,\,m\,\,{{s}^{-2}}\] | |
| 1629. |
A starts from rest and moves with acceleration\[{{a}_{1}}\]. Two seconds later, B starts from rest and moves with an acceleration\[{{a}_{2}}\]. If the displacement of A in the\[{{5}^{\text{th}}}\]second is the same as that of B in the same interval, the ratio of\[{{a}_{1}}\]to\[{{a}_{2}}\]is |
| A. | 0.378472222222222 |
| B. | 0.214583333333333 |
| C. | 0.0423611111111111 |
| D. | 0.04375 |
| Answer» C. 0.0423611111111111 | |
| 1630. |
The distances travelled by a body, starting from rest and travelling with uniform acceleration in successive intervals of time of equal duration, will be in the ratio of |
| A. | 0.0430902777777778 |
| B. | 0.0431018518518519 |
| C. | 0.0438078703703704 |
| D. | 0.0445486111111111 |
| Answer» E. | |
| 1631. |
A motorist travels from A to B at a speed of 40 kmph and returns back at a speed of 60 kmph. H is average speed will be |
| A. | 40 kmph |
| B. | 48 kmph |
| C. | 50 kmph |
| D. | 60 kmph |
| Answer» C. 50 kmph | |
| 1632. |
What happens to collagen when boiled in water at normal pressure and temperature? |
| A. | Changes into Gelatin |
| B. | Changes into Elastin |
| C. | Changes into Fibrine |
| D. | No changes |
| Answer» B. Changes into Elastin | |
| 1633. |
Ciliated epithelium is found in which one of the following organ? |
| A. | Stomach |
| B. | Trachea |
| C. | Heart |
| D. | Nose |
| Answer» C. Heart | |
| 1634. |
Who proposed the fluid mosaic model of protoplasm? |
| A. | Singer and Nicolson |
| B. | Watson and Crick |
| C. | Robert Hook |
| D. | Robert Brown |
| Answer» B. Watson and Crick | |
| 1635. |
Which one of the following is not a cause of ozone depletion? |
| A. | Oxides of nitrogen |
| B. | Oxides of sulphur dioxide |
| C. | CFCs |
| D. | All the above |
| Answer» E. | |
| 1636. |
A unicellular protist X, which has contractile vacuole to remove excess intracellular water, was placed in salt solution of increasing osmolarity. The given graph shows the rate of contraction of vacuole to pump out excess water against osmolarity of solution.Select the option that gives the correct explanation of the data. |
| A. | In an isotonic solution there is no diffusion of water in or out of the X, so the contraction rate is zero. |
| B. | At higher osmolarity, more salt diffuses into X, therefore lower rates of contractions are required. |
| C. | The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases. |
| D. | The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP. |
| Answer» D. The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP. | |
| 1637. |
Identify the least reactive element from the following. |
| A. | \[_{8}^{16}X\] |
| B. | \[_{10}^{20}X\] |
| C. | \[_{11}^{23}X\] |
| D. | \[_{9}^{19}X\] |
| Answer» C. \[_{11}^{23}X\] | |
| 1638. |
An atom of an element contains \[17\] protons, \[18\] neutrons and \[17\] electrons. Which of the following will be the atomic structure of another isotope of this element? |
| A. | Protons Neutrons Electrons 17 20 17 |
| B. | Protons Neutrons Electrons 17 18 16 |
| C. | Protons Neutrons Electrons 18 18 17 |
| D. | Protons Neutrons Electrons 20 18 17 |
| Answer» B. Protons Neutrons Electrons 17 18 16 | |
| 1639. |
An element has an atomic number 20. How many electrons will be present in \[K,\,\,L,\,\,M\] and \[N\] shells of its atom? |
| A. | \[2,\,\,8,\,\,6,\,\,4\] |
| B. | \[2,\,\,8,\,\,7,\,\,3\] |
| C. | \[3,\,\,7,\,\,7,\,\,3\] |
| D. | \[2,\,\,8,\,\,8,\,\,2\] |
| Answer» E. | |
| 1640. |
In an element, the number of protons, electrons and neutrons are \[1,\,\,0,\,\,1\] respectively. Identify the element. |
| A. | \[{{D}^{+}}\] |
| B. | \[{{H}^{+}}\] |
| C. | \[He\] |
| D. | \[L{{i}^{+}}\] |
| Answer» B. \[{{H}^{+}}\] | |
| 1641. |
The atom of an element has \[10\] electrons, \[10\] protons and \[12\] neutrons. Find the mass number of the element. |
| A. | \[10\] |
| B. | \[12\] |
| C. | \[22\] |
| D. | \[32\] |
| Answer» D. \[32\] | |
| 1642. |
Which of the following electronic configurations represents a noble gas? |
| A. | \[2,\,\,8,\,\,2\] |
| B. | \[2,\,\,8,\,\,6\] |
| C. | \[2,\,\,8\] |
| D. | \[2,\,\,8,\,\,8,\,\,2\] |
| Answer» D. \[2,\,\,8,\,\,8,\,\,2\] | |
| 1643. |
An element \[X\] forms a un-positive ion with the electronic structure\[2,\,\,8,\,\,8\]. What is the atomic number of\[X\]? |
| A. | \[16\] |
| B. | \[17\] |
| C. | \[18\] |
| D. | \[19\] |
| Answer» E. | |
| 1644. |
A proton is identical to |
| A. | the nucleus of helium |
| B. | the nucleus of a hydrogen atom |
| C. | a molecule of a hydrogen |
| D. | an atom of hydrogen |
| Answer» E. | |
| 1645. |
The number of electrons in 3d shell for element with Atomic number 26 is |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» C. 8 | |
| 1646. |
he cathode rays tube experiments carried out by J.J. Thomson demonstrated that |
| A. | at ratio of charge to-mass for the particles of the cathode rays varies as different gases are placed in the tube |
| B. | the mass of an atom is essentially all contained in its very small nucleus |
| C. | cathode rays are streams of negatively charged ions |
| D. | the charge-to-mass ratio for a proton |
| Answer» E. | |
| 1647. |
The radius of the atom is of the order of |
| A. | \[\text{1}{{0}^{-\text{1}0}}\text{ cm}\] |
| B. | \[\text{1}{{0}^{-\text{13}}}\text{ cm}\] |
| C. | \[\text{1}{{0}^{-\text{15}}}\text{ cm}\] |
| D. | \[\text{1}{{0}^{-\text{8}}}\text{ cm}\] |
| Answer» E. | |
| 1648. |
2p orbitals have : |
| A. | n = 1,\[l\] = 2 |
| B. | n = 1,\[l\] = 0 |
| C. | n =2,\[l\] = 1 |
| D. | n = 2,\[l\] = 0 |
| Answer» D. n = 2,\[l\] = 0 | |
| 1649. |
The atomic weight of an atom is due to |
| A. | Electrons and protons |
| B. | Electrons and neutrons |
| C. | Neutrons and protons |
| D. | Electrons, neutrons and protons |
| Answer» E. | |
| 1650. |
An atom of an element has 26 electrons and has a mass number 56. The nucleus of this atom contains .......... neutrons. |
| A. | 26 |
| B. | 36 |
| C. | 30 |
| D. | 56 |
| Answer» D. 56 | |