Induced breeding is used to increase the production of
- Apoultry birds
- Bdraught animals
- Ccows
- ✓fish
Answer: D.
View full solution →Question types
Model Paper 4 question types
45 questions across 6 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
45
Questions
6
Question groups
5
Question types
01
M.C.Q. [1 M]
16 Q→02Assertion (A) & Reason (B) MCQ
4 Q→03Que-Ans (Each of 2 Mark )
8 Q→04Que-Ans (Each of 3 Mark )
9 Q→05Que-Ans (Each of 5 Mark )
5 Q→06Case study ( 4 Marks )
3 Q→Sample Questions
Model Paper 4 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which will not give a stable solution even when stirred for sometimes?
- AMilk in water
- BCommon salt in water
- ✓Egg albumin in water
- DSugar in water
Answer: C.
View full solution →To prepare iron sulphide, by heating a mixture of iron filings and sulphur powder, we should use a:
- Acopper dish
- ✓china dish
- Cwatch glass
- Dpetri dish
Answer: B.
View full solution →In the plant cells, many substances important for life are stored in:
- Aplastids
- Blysosomes
- Cmitochondria
- ✓vacuoles
Answer: D.
View full solution →The tissue shown in the given figure is
- AAngular collenchyma, in which wall thickenings are present at the angles
- ✓Xylem vessel that forms long channels for conduction of water and minerals
- CPhloem parenchyma with abundant food reserve
- DScierenchyma, in which uniform wall thickenings are present
Answer: B.
View full solution →Assertion (A): Isotopes are electrically neutral.
Reason (R): Isotopes are species with same mass number but different atomic numbers.
Reason (R): Isotopes are species with same mass number but different atomic numbers.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →Assertion (A): A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years, the nail is still present there.
Reason (R): The girth of the stem or root increases due to apical meristem (cambium).
Reason (R): The girth of the stem or root increases due to apical meristem (cambium).
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →Assertion (A): It is easier to cook food at high altitudes.
Reason (R): The boiling point of water decreases at high altitudes.
Reason (R): The boiling point of water decreases at high altitudes.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A
- CA is true but R is false.
- ✓A is false but R is true.
Answer: D.
View full solution →Assertion (A): The speedometer of an automobile measure the average speed of the automobile.
Reason (R): Average velocity is equal to total displacement per total time-taken.
Reason (R): Average velocity is equal to total displacement per total time-taken.
- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A
- CA is true but R is false.
- ✓A is false but R is true.
Answer: D.
View full solution →Complete the following equations which describe nuclear charge-
a. ${ }_{11}^{23} N a+{ }_0^1 n \rightarrow \ldots+{ }_{-1}^0 e$
a. ${ }_{11}^{23} N a+{ }_0^1 n \rightarrow \ldots+{ }_{-1}^0 e$
b. ${ }_4^9 Be +{ }_2^4 He \rightarrow{ }_0^1 n+$___ $\qquad$
c. ${ }_8^{16} O +{ }_0^1 n \rightarrow \ldots+{ }_2^4 He$
Why it is advised to tie any luggage kept on the roof of a bus with a rope?
Give a few examples of Newton's third law of motion
How will you demonstrate that air contains water vapours?
A ship sends out an ultrasound that returns from the seabed and is detected after $3.42 s$. If the speed of ultrasound through seawater is $1531\ m/s$, what is the distance of the seabed from the ship?
View full solution →Diagrammatically show the difference amongst three types of muscle fibres.
If you are provided with some vegetables to cook, we generally add salt to the vegetables during cooking process. After adding salt, vegetables releases water. What mechanism is responsible for this?
What is prokaryotic cell? Differentiate between prokaryotic cell & eukaryotic cell?
The velocity$-$time graph of a ball moving on the surface of the floor is as shown in the figure. Calculate the force acting on the ball, if mass of the ball is $100 g$
View full solution →Ram's family was worried about heavy electricity bills to be paid. Their neighbour Mohan suggested some easy and effective steps to reduce the same. Next month's bill came as a relief to Ram, as the consumption of electricity had reduced by 50 units and so had the bill.
a. In what other aspects of life can this situation help?
b. What is the unit of energy?
c. Write any three steps that you think Mohan might have suggested to Ram.
a. In what other aspects of life can this situation help?
b. What is the unit of energy?
c. Write any three steps that you think Mohan might have suggested to Ram.
Iron filings and sulphur were mixed together and divided into two parts, $A$ and $B$. Part $A$ was heated strongly while part $B$ was not heated. Dilute hydrochloric acid was added to both the parts and evolution of gas was seen in both the cases. How will you identify the gases evolved?
View full solution →Draw a neat labelled diagram of an animal cell.
Draw a well-labeled diagram of a eukaryotic nucleus. How is it different from the nucleoid?
What are the differences between the mass of the object and its weight?
The weight of any person on the moon is about 1/6 times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
Read the following text carefully and answer the questions that follow:
Homogeneous mixtures are regarded as solutions or true solutions. Heterogeneous mixtures are of two types. These are suspensions and colloidal solutions. These differ in the size of the particles responsible for the difference in their properties. In a suspension, the particle size is more than $10^{-5} \ cm$ whereas in a colloidal solution, it ranges between $10^{-5} \ cm$ to $10^{-7} \ cm$. The two phases which constitute colloidal solutions, are dispersed phase and dispersion medium. Based upon their nature, the colloidal solutions are classified into eight types. The mixture of the non$-$reacting gases is always homogeneous irrespective of their nature. Therefore, it is not a colloidal solution.
$i.$ Scattering of light occurs when a beam of light is passed through Blood. Why?
$ii.$ What is Tyndall effect?
$iii.$ What is called colloidal solution?
$OR$
Give an example of colloidal solution and identified their dispersed phase and dispersion medium?
View full solution →Homogeneous mixtures are regarded as solutions or true solutions. Heterogeneous mixtures are of two types. These are suspensions and colloidal solutions. These differ in the size of the particles responsible for the difference in their properties. In a suspension, the particle size is more than $10^{-5} \ cm$ whereas in a colloidal solution, it ranges between $10^{-5} \ cm$ to $10^{-7} \ cm$. The two phases which constitute colloidal solutions, are dispersed phase and dispersion medium. Based upon their nature, the colloidal solutions are classified into eight types. The mixture of the non$-$reacting gases is always homogeneous irrespective of their nature. Therefore, it is not a colloidal solution.
$i.$ Scattering of light occurs when a beam of light is passed through Blood. Why?
$ii.$ What is Tyndall effect?
$iii.$ What is called colloidal solution?
$OR$
Give an example of colloidal solution and identified their dispersed phase and dispersion medium?
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