Q1.
The dimensions of universal gravitational constant (G) are:
💡 Solution & Explanation:
Correct Option: A
Q2.
A particle starts from rest and moves with uniform acceleration. If it covers a distance x in the first 10 seconds and distance y in the next 10 seconds, then:
💡 Solution & Explanation:
Correct Option: C
Q3.
A body of mass 5 kg is acted upon by two perpendicular forces of 8 N and 6 N. The magnitude of acceleration of the body is:
💡 Solution & Explanation:
Correct Option: B
Q4.
If kinetic energy of a body becomes 4 times its initial value, then the percentage increase in its linear momentum will be:
💡 Solution & Explanation:
Correct Option: B
Q5.
The escape velocity from the surface of Earth is v_e. If a planet has twice the radius and 8 times the mass of Earth, the escape velocity from that planet will be:
💡 Solution & Explanation:
Correct Option: B
Q6.
An ideal gas undergoes an adiabatic expansion where volume increases 8 times. If γ = 5/3, the final temperature in terms of initial temperature T1 is:
💡 Solution & Explanation:
Correct Option: B
Q7.
The fundamental frequency of an open organ pipe is 300 Hz. If one end is closed, its new fundamental frequency will be:
💡 Solution & Explanation:
Correct Option: A
Q8.
Two point charges +q and -q are placed at a distance 2a apart. The electric potential at any point on the equatorial line is:
💡 Solution & Explanation:
Correct Option: A
Q9.
In a Young's double slit experiment, if the distance between slits is halved and distance between slits and screen is doubled, the fringe width will be:
💡 Solution & Explanation:
Correct Option: C
Q10.
The de Broglie wavelength of an electron accelerated through a potential difference of 100 V is approximately:
💡 Solution & Explanation:
Correct Option: A
Q11.
The number of moles of hydrogen gas produced when 23 g of metallic sodium reacts with excess water is:
💡 Solution & Explanation:
Correct Option: B
Q12.
Which of the following molecules has a zero dipole moment?
💡 Solution & Explanation:
Correct Option: C
Q13.
For a reaction to be spontaneous at all temperatures, the thermodynamic conditions are:
💡 Solution & Explanation:
Correct Option: A
Q14.
What is the pH of a 0.001 M NaOH solution at 25 degC?
💡 Solution & Explanation:
Correct Option: C
Q15.
Which of the following coordination compounds exhibits optical isomerism?
💡 Solution & Explanation:
Correct Option: A
Q16.
In the extraction of copper, the matte obtained from the reverberatory furnace mainly contains:
💡 Solution & Explanation:
Correct Option: A
Q17.
An organic compound with formula C3H7Cl on reaction with alcoholic KOH gives an alkene which on ozonolysis gives:
💡 Solution & Explanation:
Correct Option: A
Q18.
Which of the following compounds gives a positive Iodoform test (forms yellow precipitate of CHI3 with I2/NaOH)?
💡 Solution & Explanation:
Correct Option: A
Q19.
Cannizzaro reaction is NOT shown by which of the following aldehydes?
💡 Solution & Explanation:
Correct Option: A
Q20.
Which of the following vitamins is water-soluble?
💡 Solution & Explanation:
Correct Option: A
Q21.
In C4 plants, the primary carbon dioxide acceptor is:
💡 Solution & Explanation:
Correct Option: A
Q22.
During aerobic respiration, the complete breakdown of one molecule of glucose via glycolysis, Krebs cycle and oxidative phosphorylation yields a net of how many ATP molecules?
💡 Solution & Explanation:
Correct Option: A
Q23.
The plant hormone responsible for apical dominance is:
💡 Solution & Explanation:
Correct Option: A
Q24.
Which phase of cell division is characterized by the alignment of chromosomes along the equatorial plate?
💡 Solution & Explanation:
Correct Option: A
Q25.
In a Mendelian dihybrid cross, the phenotypic ratio in the F2 generation is:
💡 Solution & Explanation:
Correct Option: A
Q26.
The sequence of nitrogenous bases in an mRNA codon is 5'-AUG-3'. The corresponding anticodon on the initiator tRNA is:
💡 Solution & Explanation:
Correct Option: A
Q27.
Double fertilization is a unique characteristic of which plant group?
💡 Solution & Explanation:
Correct Option: A
Q28.
According to Robert May's global estimate, the total number of species on Earth is approximately:
💡 Solution & Explanation:
Correct Option: A
Q29.
The pyramid of energy in any natural ecosystem is:
💡 Solution & Explanation:
Correct Option: A
Q30.
Which of the following is an ex-situ method of biodiversity conservation?
💡 Solution & Explanation:
Correct Option: A
Q31.
The enzyme enterokinase (enteropeptidase) secreted by intestinal mucosa helps in the conversion of:
💡 Solution & Explanation:
Correct Option: A
Q32.
In human nephrons, the maximum reabsorption of water and electrolytes (about 70-80%) occurs in:
💡 Solution & Explanation:
Correct Option: A
Q33.
During muscle contraction, which of the following bands/zones shortens or disappears in the sarcomere?
💡 Solution & Explanation:
Correct Option: A
Q34.
The cardiac pacemaker in the human heart that generates action potentials at the highest rate is:
💡 Solution & Explanation:
Correct Option: A
Q35.
Which hormone is responsible for triggering ovulation during the menstrual cycle?
💡 Solution & Explanation:
Correct Option: A
Q36.
A man with blood group A marries a woman with blood group B. What are the possible blood groups of their offspring?
💡 Solution & Explanation:
Correct Option: A
Q37.
Flippers of penguins and dolphins are classic examples of:
💡 Solution & Explanation:
Correct Option: A
Q38.
The antibody found abundantly in human colostrum providing natural passive immunity to newborns is:
💡 Solution & Explanation:
Correct Option: A
Q39.
In genetic engineering, the 'molecular scissors' used to cut DNA at specific palindromic recognition sequences are:
💡 Solution & Explanation:
Correct Option: A
Q40.
The first human clinical gene therapy was administered in 1990 to a 4-year-old girl suffering from which genetic deficiency?