Which of the following is not associated with the growth of a plant?
- AAuxin
- BCytokinins
- ✓Abscisic acid
- DGibberellins
Answer: C.
View full solution →Question types
MODEL PAPER - 7 [2026] question types
45 questions across 18 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
45
Questions
18
Question groups
5
Question types
01
M.C.Q
7 Q→02M.C.Q-[Che-1M]
7 Q→03Assertion - Reasoning (1 Marks)
2 Q→04Assertion - Reasoning [Che-1 M]
1 Q→05[2 Mark Questions]
4 Q→06Answer the questions.[Che-2M]
1 Q→07[3 Mark Questions]
2 Q→08Answer the questions.[Che-3M]
3 Q→09[5 marks Questions]
2 Q→10case /data -based [Che-4M]
1 Q→11case /data -based (4 Marks)
1 Q→12Answer the questions.[Che-5M]
2 Q→13M.C.Q-[Phy-1M]
2 Q→14Assertion - Reasoning [Phy-1 M]
1 Q→15Answer the questions.[Phy-2M]
3 Q→16Answer the questions.[Phy-3M]
3 Q→17case /data -based [Phy-4M]
1 Q→18Answer the questions.[Phy-5M]
2 Q→Sample Questions
MODEL PAPER - 7 [2026] questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
In the slides showing binary fission in Amoeba and budding in yeast, the correct observations are :
A. The daughter cells of Amoeba and the bud of Yeast are smaller than their respective parental cells.
B. The daughter cells of Amoeba and the bud of Yeast are the same sizes as their respective parental cells.
C. The daughter cells of Amoeba are bigger than the parent cell but the bud of yeast is smaller than the parent.
D. The daughter cells of Amoeba are smaller than the parent but the bud of Yeast is larger than the parent.
A. The daughter cells of Amoeba and the bud of Yeast are smaller than their respective parental cells.
B. The daughter cells of Amoeba and the bud of Yeast are the same sizes as their respective parental cells.
C. The daughter cells of Amoeba are bigger than the parent cell but the bud of yeast is smaller than the parent.
D. The daughter cells of Amoeba are smaller than the parent but the bud of Yeast is larger than the parent.
- A(B)
- ✓(A)
- C(D)
- D(C)
Answer: B.
View full solution →Food web is constituted by
- Arelationship between plants and animals
- Brelationship between the organisms and the environment
- Crelationship between animals and environment.
- ✓various interlinked food chains in an ecosystem
Answer: D.
View full solution →Which part of the following is a site of implantation?
- AD
- ✓A
- CC
- DB
Answer: B.
View full solution →Which part of the leaf will have starch when exposed to sunlight ?
- AC only
- ✓Both A and B
- CB only
- DA only
Answer: B.
View full solution →Baking soda is a mixture of :
- ASodium carbonate and acetic acid
- BSodium hydrogen carbonate and acetic acid
- ✓Sodium hydrogen carbonate and tartaric acid
- DSodium carbonate and tartaric acid
Answer: C.
View full solution →The correct structural formula of butanoic acid is
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
- ✓Graphite
- BDiamond
- CSulphur
- DFullerene
Answer: A.
View full solution →Match the following with the correct response :
| Column A | Column B |
| (i) Alcohol | (a) - X |
| (ii) Aldehyde | (b) - CHO |
| (iii) Ketone | (c) - OH |
| (iv) Haloalkane | (d) - CO - |
- ✓(i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
- B(i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)
- C(i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)
- D(i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
Answer: A.
View full solution →Which of the following represents favourable conditions for the process of fermentation of ethyl alcohol?
- APresence of light
- BPresence of air
- ✓None of these
- DVery high temperature
Answer: C.
View full solution →Assertion (A) : The brain allows us to think and take actions based on that thinking.
Reason (R) : The hind brain is the main thinking part of the brain which has regions which receive sensory impulses from various receptors.
Reason (R) : The hind brain is the main thinking part of the brain which has regions which receive sensory impulses from various receptors.
Assertion (A) : If mother is homozygous for black hair and father has red hair then their child can inherit black hair.
Reason (R) : Gene for black hair is recessive to gene for red hair in humans.
Reason (R) : Gene for black hair is recessive to gene for red hair in humans.
Assertion (A) : Hydrogen peroxide is kept in coloured bottles.
Reason (R) : Hydrogen peroxide is a moderately reactive metal that can react with light or heat slowly to produce water.
Reason (R) : Hydrogen peroxide is a moderately reactive metal that can react with light or heat slowly to produce water.
Given below is an energy flow diagram. Study it carefully and answer the following questions:
a. How much energy (in units) will pass from grass to goat?
b. How much energy (in units) will pass from goat to tiger?
c. Which law operates during the transfer of energy from grass to goat to tiger?
a. How much energy (in units) will pass from grass to goat?
b. How much energy (in units) will pass from goat to tiger?
c. Which law operates during the transfer of energy from grass to goat to tiger?
During a street fight between two individuals, mention the effects on the following organs by the autonomic nervous system, in the table given below:
| Organs | Sympathetic nervous system | Parasympathetic system |
| Lungs | ||
| Heart | ||
| Salivary gland | ||
| Pupil of eye |
What is meant by an artificial ecosystem? Give two examples of artificial ecosystems.
Explain, how pesticides get accumulated in the environment.
Account for the following :
i. State the relation between hydrogen ion concentration of an aqueous solution and its pH .
ii. An aqueous solution has a pH value of 7.0. Is this solution acidic, basic or neutral.
iii. Which has a higher pH, 1 M HCl or 1 M NaOH solution?
iv. Tooth enamel is one of the hardest substance in our body. How does it undergo damage due to eating chocolates and sweets? What should we do to prevent it?
v. How do ${H}^{+}$ions exist in water?
View full solution →i. State the relation between hydrogen ion concentration of an aqueous solution and its pH .
ii. An aqueous solution has a pH value of 7.0. Is this solution acidic, basic or neutral.
iii. Which has a higher pH, 1 M HCl or 1 M NaOH solution?
iv. Tooth enamel is one of the hardest substance in our body. How does it undergo damage due to eating chocolates and sweets? What should we do to prevent it?
v. How do ${H}^{+}$ions exist in water?
Food does not pass through the digestive system by 'gravity'. This is clear from the fact that we can digest the food even if we are lying down. Explain the logic behind the passage of food through our digestive system.
Differentiate between the process of binary fission and multiple fission giving an example of each.
$P, Q$ and $R$ are 3 elements which undergo chemical reactions according to the following equations :
a. $P _2 O _3+2 Q \rightarrow Q _2 O _3+2 P$
b. $3 RSO _4+2 Q \rightarrow Q _2\left( SO _4\right)_3+3 R$
c. $3 RO +2 P \rightarrow P _2 O _3+3 R$
Answer the following questions :
i. Which element is most reactive?
ii. Which element is least reactive?
iii. State the type of reaction listed above.
View full solution →a. $P _2 O _3+2 Q \rightarrow Q _2 O _3+2 P$
b. $3 RSO _4+2 Q \rightarrow Q _2\left( SO _4\right)_3+3 R$
c. $3 RO +2 P \rightarrow P _2 O _3+3 R$
Answer the following questions :
i. Which element is most reactive?
ii. Which element is least reactive?
iii. State the type of reaction listed above.
What is a homologous series? Find the difference in molecular mass between the two consecutive members of a homologous series. State how in a homologous series of carbon compounds the following properties vary with increase in molecular mass:
a. Melting and boiling points
b. Chemical properties
a. Melting and boiling points
b. Chemical properties
An organic compound 'A' has the molecular formula $CH _2 O _2$. It turns blue litmus red and gives brisk effervescence with $NaHCO _3$. Identify 'A' and give chemical reaction.
View full solution →Draw the structure of a neuron and describe its function.
a. With the help of Mendel's experiments show that
i. traits may be dominant or recessive, and
ii. traits are inherited independently.
b. Birds and bats are more closely related to each other than to squirrels or lizards. Comment.
i. traits may be dominant or recessive, and
ii. traits are inherited independently.
b. Birds and bats are more closely related to each other than to squirrels or lizards. Comment.
The acidic behaviour of acids is due to the presence of hydrogen ( $H ^{+}$) ions in them. They produce hydrogen ions in the presence of water. Water is a polar solvent and this property of water helps in weakening the bond between the ions and makes them soluble.
Hence, acids and bases produce ions in aqueous solutions. It may be noted that a dry HCl gas or a solution of hydrogen chloride in organic, non-polar solvents like toluene or benzene do not show acidic properties. This is because hydrogen chloride does not undergo ionization in toluene.
The reason why HCl splits into $H ^{+}$and $Cl ^{-}$ions in presence of water lies in the fact that water molecules, being polar, pull the $H ^{+}$and $Cl ^{-}$ions apart and thus, the bond in HCl is broken.
i. Which acids are present in bee stings?
ii. If the pH of a solution is 8 , then find its $\left[ H ^{+}\right]$ion.
iii. If you are given water, Hydrochloric acid, and Acetic acid, then mention increasing the order of acid strength.
OR
If you are provided $H _3 PO _4, C _2 H _5 OH , H _2 CO _3$, and $CH _3 COOH$, then which compound does not give $H ^{+}$ions in an aqueous solution?
View full solution →Hence, acids and bases produce ions in aqueous solutions. It may be noted that a dry HCl gas or a solution of hydrogen chloride in organic, non-polar solvents like toluene or benzene do not show acidic properties. This is because hydrogen chloride does not undergo ionization in toluene.
The reason why HCl splits into $H ^{+}$and $Cl ^{-}$ions in presence of water lies in the fact that water molecules, being polar, pull the $H ^{+}$and $Cl ^{-}$ions apart and thus, the bond in HCl is broken.
i. Which acids are present in bee stings?
ii. If the pH of a solution is 8 , then find its $\left[ H ^{+}\right]$ion.
iii. If you are given water, Hydrochloric acid, and Acetic acid, then mention increasing the order of acid strength.
OR
If you are provided $H _3 PO _4, C _2 H _5 OH , H _2 CO _3$, and $CH _3 COOH$, then which compound does not give $H ^{+}$ions in an aqueous solution?
Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys. This leads to accumulation of poisonous wastes in the body, which can even lead to death. In case of kidney failure, an artificial kidney can be used. An artificial kidney is a device to remove waste products from the blood through dialysis.
a. i. Name the artery that brings oxygenated blood to the kidney.
ii. Name the cluster the thin-walled blood capillaries present in the Bowman's capsule.
b. In human excretory system name the organ which stores urine. Is this organ under hormonal control or nervous control?
c. List two major steps involved in the formation of urine and state in brief their functions.
OR
In which part of the nephron does selective reabsorption take place? List the factors which the amount of water reabsorbed depends on.
a. i. Name the artery that brings oxygenated blood to the kidney.
ii. Name the cluster the thin-walled blood capillaries present in the Bowman's capsule.
b. In human excretory system name the organ which stores urine. Is this organ under hormonal control or nervous control?
c. List two major steps involved in the formation of urine and state in brief their functions.
OR
In which part of the nephron does selective reabsorption take place? List the factors which the amount of water reabsorbed depends on.
What happens when (Write the balanced equation involved) -
i. Copper is heated in air?
ii. Aluminum oxide is reacted with hydrochloric acid?
iii. Potassium reacts with water?
iv. Cinnabar is heated in air?
v. Aluminium oxide reacts with sodium hydroxide?
i. Copper is heated in air?
ii. Aluminum oxide is reacted with hydrochloric acid?
iii. Potassium reacts with water?
iv. Cinnabar is heated in air?
v. Aluminium oxide reacts with sodium hydroxide?
Compound ' A ', when dissolved in water, gives compound ' B ' and liberates heat. Compound ' A ' is used in whitewashing. Compound ' B ' reacts with $CO _2$ to form a white precipitate of compound ' C '. Identify compounds ' A ', ' B ' and ' C ' Also write the equations involved.
View full solution →
- ✓11.0 cm
- B12.2 cm
- C1.7 cm
- D10.3 cm
Answer: A.
View full solution →Which of the following statements is/are incorrect?
A. A neutron has a positive charge of $+1.6 \times 10^{-19} C$
B. An ammeter is a low resistance device.
C. The resistance of semiconductors decreases with temperature.
D. One ampere is equal to $10^{-6} uA$.
A. A neutron has a positive charge of $+1.6 \times 10^{-19} C$
B. An ammeter is a low resistance device.
C. The resistance of semiconductors decreases with temperature.
D. One ampere is equal to $10^{-6} uA$.
- AA and C
- BA, B and C
- ✓A and D
- DA and B
Answer: C.
View full solution →Assertion (A) : The stars twinkle while the planet do not.
Reason (R) : The stars are much bigger in size than the planets.
Reason (R) : The stars are much bigger in size than the planets.
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source?
A wire of given material having length 1 and area of cross-section A has a resistance of $4 \Omega$. What would be the resistance of another wire of the same material having length $1 / 2$ and area of cross-section 2A?
View full solution →List four sources of magnetic field.
Observe the following incomplete ray diagram of an object where the image A'B' is formed after refraction from a convex lens.
On the basic of above information fill in the blanks.
i. The position of object AB would have been...
ii. Size of the object would have been ... than the size of image.
On the basic of above information fill in the blanks.
i. The position of object AB would have been...
ii. Size of the object would have been ... than the size of image.
When one enters a less lighted room from a place of intense light, he is not able to see anything for sometime, but after sometime the things become somewhat visible. Explain how this happens?
The image formed by a spherical mirror is real, inverted and is of magnification -2. If the image is at a distance of 30 cm from the mirror, where is the object placed? Find the focal length of the mirror. List two characteristics of the image formed if the object is moved 10 cm towards the mirror.
An insulated copper wire wound on a cylindrical cardboard tube such that its length is greater than its diameter is called a solenoid. When an electric current is passed through the solenoid, it produces a magnetic field around it. The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. The field lines inside the solenoid are in the form of parallel straight lines. The strong magnetic field produced inside a current-carrying solenoid can be used to magnetize a piece of a magnetic material like soft iron when placed inside the solenoid. The strength of the magnetic field produced by a current-carrying solenoid is directly proportional to the number of turns and strength of the current in the solenoid.
i. What would be the strength of the magnetic field inside a long current-carrying straight solenoid?
ii. Which end is north and which end is south pole when current flows through a solenoid?
iii. A long solenoid carrying a current produces a magnetic field B along its axis. If the current is double and the number of turns per cm is halved, then what will be the new value of the magnetic field?
OR
A soft iron bar is enclosed by a coil of insulated copper wire as shown in the figure. When the plug of the key is closed, then where would the face B of the iron bar be marked?
i. What would be the strength of the magnetic field inside a long current-carrying straight solenoid?
ii. Which end is north and which end is south pole when current flows through a solenoid?
iii. A long solenoid carrying a current produces a magnetic field B along its axis. If the current is double and the number of turns per cm is halved, then what will be the new value of the magnetic field?
OR
A soft iron bar is enclosed by a coil of insulated copper wire as shown in the figure. When the plug of the key is closed, then where would the face B of the iron bar be marked?
i. What is meant by resistance of a conductor? Define its SI unit.
ii. List two factors on which the resistance of a rectangular conductor depends.
iii. How will the resistance of a wire be affected if its
I. length is doubled, and
II. radius is also doubled?
Give justification for your answer.
ii. List two factors on which the resistance of a rectangular conductor depends.
iii. How will the resistance of a wire be affected if its
I. length is doubled, and
II. radius is also doubled?
Give justification for your answer.
i. For the combination of resistors shown in the following figure, find the equivalent resistance between M & N.
ii. State Joule’s law of heating.
iii. Why we need a 5 A fuse for an electric iron which consumes 1 kW power at 220 V?
iv. Why is it impracticable to connect an electric bulb and an electric heater in series?
ii. State Joule’s law of heating.
iii. Why we need a 5 A fuse for an electric iron which consumes 1 kW power at 220 V?
iv. Why is it impracticable to connect an electric bulb and an electric heater in series?
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