MHT CET 2025 12 April Shift 1 Question Paper (Available): Download Question Paper (PCB) with Answers PDF

What is the function of colipase in the human digestive system?

• (A) Stimulates insulin secretion
• (B) Activates pepsinogen
• (C) Helps lipase to act on fat droplets
• (D) Converts bile salts into bile pigments

Earthworms contribute to decomposition by:

• (A) Fixing atmospheric nitrogen
• (B) Breaking down detritus and enhancing nutrient recycling
• (C) Pollinating flowers
• (D) Producing humic acid

Match the following pairs:


a. Fructose — (i) Disaccharide

b. Lactose — (ii) Monosaccharide


Which is the correct match?

• (A) a-(i), b-(ii)
• (B) a-(ii), b-(i)
• (C) a-(ii), b-(ii)
• (D) a-(i), b-(i)

Which of the following is NOT a part usually labeled in a liver diagram?

• (A) Hepatic artery
• (B) Hepatic vein
• (C) Glomerulus
• (D) Bile duct

Which of the following tissues is primarily responsible for upward water transport in plants?

• (A) Phloem
• (B) Xylem
• (C) Parenchyma
• (D) Collenchyma

What is the role of enterokinase in digestion?

• (A) Converts pepsinogen to pepsin
• (B) Emulsifies fats
• (C) Activates trypsinogen to trypsin
• (D) Breaks down carbohydrates

Which of the following causes pneumonia in mice in Griffith's experiment?

• (A) S-type (Smooth, Virulent)
• (B) R-type (Rough, Non-virulent)
• (C) Both A and B
• (D) Heat-killed S-type only

tRNA is referred to as an "adapter molecule" primarily because it:

• (A) carries genetic information from the nucleus to the ribosome.
• (B) catalyzes the formation of peptide bonds between amino acids.
• (C) acts as a link between the mRNA codon and the corresponding amino acid.
• (D) provides the structural framework for the ribosome.

What is the main purpose of Polymerase Chain Reaction (PCR)?

• (A) To sequence DNA
• (B) To amplify specific DNA sequences
• (C) To cut DNA into fragments
• (D) To identify mutations in genes

Which of the following statements about graphite is correct?

• (A) Graphite is a good conductor of electricity due to its free electrons.
• (B) Graphite is a poor conductor of electricity because it lacks free electrons.
• (C) Graphite does not conduct electricity as it is an insulator.
• (D) Graphite conducts electricity only when heated above 100°C.

In an isothermal expansion of an ideal gas, the internal energy of the gas:

• (A) Increases as the temperature increases.
• (B) Decreases because the temperature decreases.
• (C) Remains constant.
• (D) Increases and then decreases during the expansion.

What is the major organic product obtained when phenol undergoes the Reimer-Tiemann reaction?

• (A) Benzaldehyde
• (B) o-Hydroxybenzaldehyde (Salicylaldehyde)
• (C) p-Hydroxybenzoic acid
• (D) o-Nitrophenol

What is the IUPAC name of phloroglucinol?

• (A) 1,2,3-Trihydroxybenzene
• (B) 1,3,5-Trihydroxybenzene
• (C) 2,4,6-Trihydroxybenzene
• (D) 1,2,4-Trihydroxybenzene

Which of the following elements is colourless?

• (A) Ti\(^{4+}\)
• (B) Fe\(^{2+}\)
• (C) Fe\(^{3+}\)
• (D) None of these

Which of the following represents the correct structure of crotonyl alcohol?

• (A) CH\(_2\)=CH-COOH
• (B) CH\(_3\)-CH=CH-CHOH
• (C) CH\(_3\)-CH=CH-COH
• (D) CH\(_2\)=CH-CH\(_2\)-OH

The Wolff-Löffler-Kishner reduction is used to convert which of the following compounds into the corresponding alkane?

• (A) Aldehydes
• (B) Alcohols
• (C) Ketones
• (D) Carboxylic acids

Which of the following is a non-reducing sugar?

• (A) Glucose
• (B) Sucrose
• (C) Fructose
• (D) Maltose

Which of the following correctly represents the bond angle and bond length in the crown-shaped \( S_8 \) molecule?

• (A) Bond angle \( \approx 120^\circ \), Bond length \( \approx 154 \, pm \)
• (B) Bond angle \( \approx 109.5^\circ \), Bond length \( \approx 140 \, pm \)
• (C) Bond angle \( \approx 108^\circ \), Bond length \( \approx 204 \, pm \)
• (D) Bond angle \( \approx 98^\circ \), Bond length \( \approx 205 \, pm \)

What is the major product formed when 2-methyl-3-chloropentane undergoes alcoholic KOH elimination (E2 reaction)?

• (A) 2-methyl-1-pentene
• (B) 2-methyl-2-pentene
• (C) 3-methyl-1-pentene
• (D) 3-methyl-2-pentene

What is the major product when toluene reacts with concentrated sulfuric acid (H\(_2\)SO\(_4\)) under heating conditions?

• (A) Benzene sulfonic acid
• (B) p-Toluenesulfonic acid
• (C) o-Toluenesulfonic acid
• (D) A mixture of o- and p-toluenesulfonic acids

Which of the following elements is classified as an alkali metal?

• (A) Sodium (Na)
• (B) Calcium (Ca)
• (C) Magnesium (Mg)
• (D) Aluminum (Al)

Which of the following statements is true about a chiral carbon?

• (A) A chiral carbon is attached to two identical groups.
• (B) A chiral carbon must be attached to four different groups.
• (C) A chiral carbon cannot exist in molecules with symmetry.
• (D) A chiral carbon is always part of an alkene.

A system absorbs 50 J of heat and does 10 J of work. What is the change in internal energy (\(\Delta U\)) of the system?

• (A) \(\Delta U = 60 \, J\)
• (B) \(\Delta U = 40 \, J\)
• (C) \(\Delta U = 50 \, J\)
• (D) \(\Delta U = -10 \, J\)

Which of the following compounds is a cyclic allyl?

• (A) Cyclohexene
• (B) Cyclopropene
• (C) 1,3-Cyclohexadiene
• (D) Cycloheptatriene

What is the IUPAC name of the compound with the following structure: benzene attached to COOH, OH, and an ethyl group?

• (A) 2-Ethylbenzoic acid
• (B) 3-Ethylsalicylic acid
• (C) 4-Ethylphenol
• (D) 2-Ethyl-4-hydroxybenzoic acid

What is the IUPAC name of phenylmethane?

• (A) Benzyl alcohol
• (B) Toluene
• (C) Benzene methane
• (D) Methylbenzene

To double the pressure of an ideal gas, keeping volume and number of moles constant, the temperature should be:

• (A) 2T
• (B) 4T
• (C) T/2
• (D) T/4

An AC circuit has a resistance of 150 \(\Omega\), inductive reactance of 250 \(\Omega\), and capacitive reactance of 100 \(\Omega\). What is the phase difference between current and voltage?

• (A) \( \tan^{-1}\left(\frac{250 - 100}{150}\right) \)
• (B) \( \tan^{-1}\left(\frac{100 - 250}{150}\right) \)
• (C) \( \tan^{-1}\left(\frac{150}{250 - 100}\right) \)
• (D) \( \tan^{-1}\left(\frac{150}{250 + 100}\right) \)

What is the energy required to increase the radius of a soap bubble from \( R \) to \( 2R \) considering the surface tension \( T \)?

• (A) \( 8 \pi T R^2 \)
• (B) \( 4 \pi T R^2 \)
• (C) \( 2 \pi T R^2 \)
• (D) \( 16 \pi T R^2 \)

Two coherent waves are represented by \( y_1 = a_1 \cos \omega t \) and \( y_2 = a_2 \sin \omega t \), and they are superimposed on each other. The resulting intensity is proportional to:

• (A) \( (a_1 + a_2)^2 \)
• (B) \( (a_1 - a_2)^2 \)
• (C) \( a_1^2 + a_2^2 \)
• (D) \( \sqrt{a_1^2 + a_2^2} \)