M.C.Q. [1 M]

MCQ 11 Mark

Using fertilizers in farming is an example of

✓
High cost production
B
Low cost production
C
Moderate cost production
D
No cost production

Answer

Correct option: A.

High cost production

(a) High cost production
Explanation: High cost production

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MCQ 21 Mark

The particles of the colloidal solution are

✓
visible with a powerful microscope
B
not visible with a powerful microscope
C
visible with the naked eye
D
visible with a simple microscope

Answer

Correct option: A.

visible with a powerful microscope

The size of particles of the colloidal solution lies between $10^{-7} \ cm$ to $10^{-4} \ cm$ in diameter. So, The particles of colloidal solutions are visible with a powerful microscope.

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MCQ 31 Mark

Which one of the following will result in the formation of a mixture?

A
Breaking of ice cubes into small pieces
B
Adding sodium metal to water
✓
Agitating a detergent with water in a washing machine
D
Crushing of a marble tile into small particles

Answer

Correct option: C.

Agitating a detergent with water in a washing machine

(c) Agitating a detergent with water in a washing machine
Explanation: Detergent in water will form a mixture, others will not form a mixture.

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MCQ 41 Mark

Lysosomes arises from

A
Nucleus
✓
Golgi apparatus
C
Endoplasmic reticulum
D
Mitochondria

Answer

Correct option: B.

Golgi apparatus

(b) Golgi apparatus
Explanation: Lysosomes are membrane bound vesicles that arise from the Golgi apparatus.

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MCQ 51 Mark

Which is the most widely distributed connective tissue?

A
Blood
B
Lymph
C
Adipose connective tissue
✓
Areolar connective tissue

Answer

Correct option: D.

Areolar connective tissue

(d) Areolar connective tissue
Explanation: Areolar connective tissue is the simplest and most widely distributed connective tissue. Areolar connective tissue

is found between the skin and muscles, around blood vessels and nerves, and in the bone marrow.

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MCQ 61 Mark

Which of the following are isotopes and which are isobars? Argon (Ar), Deuterium (D), Calcium (Ca), Tritium (T), Protium (P)

A
Ar, Ca are isotopes and D, T, P are isobars
B
D, P are isotopes
✓
Ar, Ca are isobars and D, T, P are isotopes
D
Ar, P, T are isobars

Answer

Correct option: C.

Ar, Ca are isobars and D, T, P are isotopes

(c) Ar, Ca are isobars and D, T, P are isotopes
Explanation: Elements having the same atomic number but different atomic masses are known as Isotopes.

Protium(Hydrogen) -1, Deuterium – 2, Tritium -3 are three isotopes of hydrogen.

Atoms having the same atomic mass and different atomic numbers are known as Isobars. Example Argon, Calcium.

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MCQ 71 Mark

A train starts from a station $P$ and travels some distance with a uniform acceleration al, then it goes with uniform retardation $a_2$ for some more distance and come to rest at the station $Q$. If the distance berween the stations $P$ and $Q$ is $4 \ km$ and the train takes $4$ minutes to complete this journey, then $\frac{1}{q_1}+\frac{1}{q_2}=$

A
$4 m^{-1} s^2$
B
$2 m^{-1} s^2$
C
$72 m^{-1} s^2$
✓
$7.2 m^{-1} s^2$

Answer

Correct option: D.

$7.2 m^{-1} s^2$

For motion with uniform acceleration $a _1$ :
From $v = u + at$
$v=a_1 t_1(\because u=0), \therefore t_1=\frac{v}{a_1} . .$
and from $s = ut +\frac{1}{2} at ^2$,Using eqn$....... (i)$
$s_1=\frac{1}{2} a_1\left(\frac{v}{a_1}\right)^2=\frac{v^2}{2 a_1}.....(ii)$
For motion with uniform retardation $a _2$ :
From $v = u + at$
$v=a_2 t_2\left(\because v=0, u=v, a=-a_2\right)$
$t_2=\left(\frac{v}{a_2}\right) \ldots(iii)$
and from $s = ut +\frac{1}{2} at ^2$
$s_2=v \frac{v}{a_2}+\frac{1}{2}\left(-a_2\right) \cdot \frac{v^2}{a_2^2}$
$s_2=\frac{v^2}{a_2}-\frac{v^2}{2 a_2}=\frac{v^2}{2 a_2} \ldots(iv)$
Given, $s _1+ s _2=4 \ km$ and $t _1+ t _2=4 min$, so using $(ii)$ and $(iv)$
$\frac{v^2}{2}\left(\frac{1}{a_1}+\frac{1}{a_2}\right)=4 \ldots(v)$
$\text { and } v\left(\frac{1}{a_1}+\frac{1}{a_2}\right)=4 \ldots(vi)$
Dividing eqn. $(v)$ by eqn. $(vi),$ we get $v =2$
Putting this in eqn. $(vi),\frac{1}{a_1}+\frac{1}{a_2}=2 \frac{\min ^2}{km}=\frac{2 \times 3600}{1000} \frac{s^2}{m}$
$=7.2 m^{-1} s^2$

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MCQ 81 Mark

In the experiment to establish the relation between loss in weight of an immersed solid with the weight of water displaced by it, the upthrust experience by the object in tap water and in salry water are $U _w$ and $U _s$ respectively, then:

A
$U_4
✓
$U_w>U_s$
C
$U_w=U_s$
D
$U _{ B }=2 U _{ w }$

Answer

Correct option: B.

$U_w>U_s$

(b)$U_w>U_s$
Explanation: The density of salty water is more as compared to tap water hence, the upthrust by salty water is more.

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MCQ 91 Mark

Observe the given figures of three different plant tissues and select the correct statement

A
Cell walls of a, b and c bear uniform thickening of suberin.
B
a provides mechanical strength to the plant while b and c serve as storage tissues
C
Cytoplasm is present in cells of a while it is absent in cells of b and c.
✓
a and b consist of living cells while c consists of dead cells.

Answer

Correct option: D.

a and b consist of living cells while c consists of dead cells.

(d) a and b consist of living cells while c consists of dead cells.
Explanation: In the given figure of plant tissues ‘a’ and ‘b’ represent parenchymatous and collenchymatous tissues respectively that are living tissues whereas figure ‘c’ represents sclerenchymatous tissue which comprises of dead cells.

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MCQ 101 Mark

Sulphate of a divalent metal $M$ exists in hydrated form. If $0.10$ mol of metal sulphate combines with $9.0\ g$ of water to form the hydrated salt then, the formula of metal sulphate will be

A
$M2SO4.3H2O$
B
$MSO4.5H2O$
C
$M2SO4-2H2O$
D
$MSO4 H2O$

Answer

As the metal is divalent, the formula of hydrated sulphate will be $MSO _4 \cdot xH _2 O$
To find the value of $x :0.10$ mol of $MSO _4$ combines with $9\ g$ of $H _2 O\ ($i.e.,$ 0.5$ mol of water$).$
$\left[\because\right.$ moles of $H _2 O =\frac{9}{18}=0.5 ]$
$\therefore 1\ mol$ of $MSO _4$ will combine with $\frac{0.5}{0.10}=5\ mol$ of water.
So, formula of sulphate is $MSO _4 \cdot 5 H _2 O$.

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MCQ 111 Mark

The energy currency of the cell is:

A
AMP
B
GTP
✓
ATP
D
ADP

Answer

Correct option: C.

ATP

(c) АTР
Explanation: Adenosine triphosphate (ATP) is called as the energy currency of the cell. The energy produced by a cell during

internal respiration is stored in the form of ATP molecules. ATP breaks into ADP and phosphate to produce energy during cellular processes.

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MCQ 121 Mark

Which of the following is not a function of the epidermis?

A
Transpiration
✓
Conduction of food
C
Exchange of gases
D
Protection

Answer

Correct option: B.

Conduction of food

(b) Conduction of food
Explanation: The epidermis does not conduct the food to the various parts of the plant. Conduction of food is carried by phloem tissue.

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MCQ 131 Mark

Bee pasturage refers to

✓
the flowers available for nectar collection by the bees
B
the trees where bees make the hives
C
the hives where honeybees live and deposit honey
D
the worker bees in a hive, who collect honey

Answer

Correct option: A.

the flowers available for nectar collection by the bees

(a) the flowers available for nectar collection by the bees
Explanation: Pasturage is the availability of flowers to the bees for nectar and pollen collection. Pasturage is related to honey production because it determines the taste of honey and the quantity of honey.

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MCQ 141 Mark

If a moving body comes to rest, then it's acceleration is:

✓
Negative
B
Positive
C
Constant
D
Zero

Answer

Correct option: A.

Negative

(a) Negative
Explanation: If a moving body comes to rest, then its acceleration is negative, as it’s velocity becomes zero. therefore the acceleration is also zero.

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MCQ 151 Mark

The functional units of the Golgi apparatus are:

✓
cisternae
B
vacuoles
C
vesicles
D
cytoplasm

Answer

Correct option: A.

cisternae

(a) cisternae
Explanation: Golgi apparatus is a membrane-bound organelle of eukaryotic cells (cells with clearly defined nuclei) that is

made up of a series of flattened, stacked pouches called cisternae. The Golgi apparatus is responsible for transporting,

modifying, and packaging proteins and lipids into vesicles for delivery to targeted destinations.

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MCQ 161 Mark

The inferences drawn by the temperature versus time graph are

A. During the melting, temperature of substance does not change.
B. Temperature rises after all amount of ice melts.
C. At a specific temperature water starts boiling and temperature remains the same during the conversion of water into steam.
Which statement is correct regarding graph?

A
Only (C) is correct
✓
All (A), (B) and (C) are correct
C
Only (B) is correct
D
Only (A) is correct

Answer

Correct option: B.

All (A), (B) and (C) are correct

(b) All (A), (B) and (C) are correct
Explanation:

A. During the change of state, given heat is used to change the state. So temperature remains same. AB and CD parts show

constant temperature

B. BC part represents increase in temperature.

C. CD is water starts boiling and temperature remains the same during the conversion of water into steam.

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