Major Competitive Exams

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Q. What is the gravitational potential energy of a satellite of mass m at a height h above the Earth's surface?
  • A. -GMm/R
  • B. -GMm/(R+h)
  • C. -GMm/(R-h)
  • D. -GMm/(R^2 + h^2)
Q. What is the gravitational potential energy of an object of mass m at a height h above the Earth's surface?
  • A. mgh
  • B. gh/m
  • C. mg/h
  • D. mgh^2
Q. What is the gravitational potential energy of two masses m1 and m2 separated by a distance r?
  • A. -G * (m1 * m2) / r
  • B. G * (m1 * m2) / r
  • C. G * (m1 + m2) / r
  • D. -G * (m1 + m2) / r
Q. What is the gravitational potential energy U of two masses m1 and m2 separated by a distance r?
  • A. U = -G * (m1 * m2) / r
  • B. U = G * (m1 * m2) / r
  • C. U = (m1 + m2) * r
  • D. U = G * (m1 - m2) / r
Q. What is the ground state electron configuration of an oxygen atom? (2023)
  • A. 1s² 2s² 2p⁴
  • B. 1s² 2s² 2p²
  • C. 1s² 2s² 2p⁶
  • D. 1s² 2s¹ 2p⁵
Q. What is the group number of Alkali metals in the periodic table? (2023)
  • A. 1
  • B. 2
  • C. 3
  • D. 0
Q. What is the group number of Halogens in the periodic table? (2021)
  • A. 16
  • B. 17
  • C. 18
  • D. 15
Q. What is the half-life of a radioactive isotope?
  • A. Time taken for half of the sample to decay
  • B. Time taken for the entire sample to decay
  • C. Time taken for the sample to double
  • D. None of the above
Q. What is the half-life of a radioactive substance if it takes 10 years for half of the substance to decay?
  • A. 5 years
  • B. 10 years
  • C. 20 years
  • D. 30 years
Q. What is the half-life of a radioactive substance?
  • A. The time taken for half of the substance to decay
  • B. The time taken for the entire substance to decay
  • C. The time taken for the substance to double
  • D. The time taken for the substance to reach equilibrium
Q. What is the HCF of 36, 60, and 48?
  • A. 6
  • B. 12
  • C. 18
  • D. 24
Q. What is the heat required to raise the temperature of 2 kg of aluminum from 25°C to 75°C? (Specific heat of aluminum = 0.9 J/g°C) (2022)
  • A. 9000 J
  • B. 18000 J
  • C. 36000 J
  • D. 4500 J
Q. What is the heat required to raise the temperature of 250 g of aluminum from 25°C to 75°C? (Specific heat of aluminum = 0.9 J/g°C)
  • A. 4500 J
  • B. 5000 J
  • C. 6000 J
  • D. 7000 J
Q. What is the hexadecimal representation of the decimal number 16? (2023)
  • A. 10
  • B. 16
  • C. 1A
  • D. 0F
Q. What is the highest civilian award in India? (1954)
  • A. Padma Vibhushan
  • B. Bharat Ratna
  • C. Padma Bhushan
  • D. Mahatma Gandhi Peace Prize
Q. What is the highest peak in India?
  • A. K2
  • B. Kangchenjunga
  • C. Nanda Devi
  • D. Mount Everest
Q. What is the hybridization of a molecule with a tetrahedral shape?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
Q. What is the hybridization of carbon atoms in benzene?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp2
Q. What is the hybridization of nitrogen in a primary amine?
  • A. sp
  • B. sp2
  • C. sp3
  • D. None of the above
Q. What is the hybridization of nitrogen in amines?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
Q. What is the hybridization of the carbon atom in acetylene (C2H2)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atom in CO2?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atom in ethylene (C2H4)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
Q. What is the hybridization of the carbon atom in ethyne (C2H2)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atoms in alkenes?
  • A. sp
  • B. sp2
  • C. sp3
  • D. None of the above
Q. What is the hybridization of the carbon atoms in an alkyne?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atoms in benzene?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atoms in ethylene (C2H4)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
Q. What is the hybridization of the carbon atoms in ethyne (C2H2)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atoms involved in the double bond of alkenes?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
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