🔬 General Science Solved MCQs with Answers

Practice 4010 approved 🔬 General Science questions with verified answers from the 🌐 Current Affairs & GK subject for Pakistan exams.

4010 solved MCQs

In the complete cell diagram the two half cells are separated by double vertical line which represents?Answer: Salt bridge A wavelength of 245 nm occurs in which proton of the electromagnetic spectrum?Answer: Ultraviolet Ethyne can be prepared using 1, 2-dibromoethane as starting material. What else is used in preparation?Answer: Alcoholic KOH Anemometer is the instrument used for measurement of ____?Answer: Wind Speed In chromotherapy the mobile phase is called _____?Answer: Eluate The kinetic energy of an electron ejected from a metal surface exposed to monochromatic radiation depends on the at _____?Answer: Frequency of the light used Which of the following concepts introduced by Einstein laid the foundation for modern quantum mechanics?Answer: Photoelectric effect It two bodies are moving in opposite directions with non-zero velocities, which of the following statements is true?Answer: None of these Mechanism for the emission of β⁻ particle from nucleus is that in which?Answer: Neutron is changed into proton What does Kepler's law period relate?Answer: Time period and semi-major axis At the same temperature and pressure two identical balloons were separately filled with oxygen and hydrogen. If O2 escaped at the rate of 100ml per second the hydrogen will escape at rate of _____?Answer: 400 ml per second If a satellite is orbiting as close to the earth's surface as possible ______?Answer: Its kinetic energy will be maximum Which of the following process does not use a catalyst?Answer: Thermite process A paramagnetic material had a magnetic field intensity of 10^4 A/m. If the susceptibility of the material at room temperature is 3.7 × 10^-3, the magnetization is?Answer: 37 A/m What type of sample cuvette should be used for measuring the absorbance of a molecule at 220 nm?Answer: Quartz The Gauss divergence theorem converts ______?Answer: Surface to volume integral The IUPAC name of Mesitylene is ______?Answer: 1,3,5-Trimethylbenzene The classical expression for the mean energy of a one-dimensional oscillators is?Answer: (KBT/2 + KBT/2) The average translational kinetic energy of O2 (relative molar mass 32) molecules at a particular temperature is 0.048eV. The translational kinetic energy of N2 (relative molar mass 28) molecules in eV at that same temperature is?Answer: 0.048 Which of the following atoms has greatest tendency to capture an additional electrons?Answer: F The vacuum or free space, what observations are made?Answer: p = 0, J = 0 The correct order of spectral regions with respect to increasing frequency is _____?Answer: RF, IR, ViS, UV Which of the following is not member of the transition metal?Answer: The beryllium family The element having valance shell electronic configuration is 3s² 3p⁵ that belongs to _____?Answer: 3rd period, VIIA group Enthalpy of reaction is same whether the reactions takes place in one or several steps. This is known as?Answer: Hess's law A well stopped thermos flask contain some ice cubes. This is an example of ______?Answer: Isolated system A bottle of dilute hydrochloric acid is 2M. What mass of hydrogen chloride, HO, would be discussed in 100cm^3 of this acid?Answer: 7.3g in 100 cm^3 A hypermetropic person having near point at a distance of 0.75 m puts on spectacles of power 2.5 D. The near point now is at ____?Answer: 0.26 m Raman spectra may be obtained in _____?Answer: UV and Visible region Why is breastfeeding important for the baby?Answer: Breastfed babies are healthier