Mock Test

Exam: RRB Group D Subject: General Science Topic: Chemistry

Total Questions: 20

Q1. Which factor does NOT influence the electrical conductivity of a solid?

Presence of defects Temperature Crystal structure Molar mass of the element
Q2. What should be done with chemical waste that is not properly labeled?

Dispose of it in the regular trash Attempt to guess its contents Treat it as hazardous and consult a supervisor Dilute it with water
Q3. Which of the following reactions involves the displacement of a less reactive metal by a more reactive metal?

Fe + CuSO4 → FeSO4 + Cu 2H2 + O2 → 2H2O CaCO3 → CaO + CO2 HCl + NaOH → NaCl + H2O
Q4. Which of the following is a natural polymer found in plants?

Polythene Nylon Cellulose Teflon
Q5. The chemical reactivity of alkali metals increases down the group because:

Electronegativity increases Electronegativity decreases Ionization energy increases Ionization energy decreases
Q6. Which of the following is a pure substance?

Saltwater Air Gold Milk
Q7. Which imaging technique is commonly used to visualize nanoparticles?

Optical microscope Electron microscope Light microscope Telescope
Q8. The monomer unit of natural rubber is:

Ethylene Propylene Isoprene Styrene
Q9. Which of the following undergoes substitution reactions readily?

Alkenes Alkynes Alkanes Alcohols
Q10. Which type of polymerization is responsible for the formation of polyethylene?

Condensation polymerization Addition polymerization Radical polymerization Anionic polymerization
Q11. Which quantum number describes the shape of an atomic orbital?

Principal quantum number (n) Azimuthal quantum number (l) Magnetic quantum number (ml) Spin quantum number (ms)
Q12. What is the chemical formula for sodium hydroxide?

NaOH KOH Ca(OH)2 Mg(OH)2
Q13. Which vitamin deficiency causes scurvy?

Vitamin A Vitamin D Vitamin C Vitamin B6
Q14. Ammonia is primarily used in the production of which of the following?

Plastics Fertilizers Soaps Paints
Q15. The process of joining small molecules to form a large molecule is called:

Decomposition Polymerization Substitution Addition
Q16. What is synthesized when hydrogen peroxide (H2O2) decomposes?

Water and oxygen Hydrogen and oxygen Water and ozone Hydrogen and ozone
Q17. The synthesis of detergents often involves the process of:

Sulfonation Hydrolysis Dehydration Reduction
Q18. The standard enthalpy of formation of an element in its most stable form at standard conditions is:

Always positive Always negative Zero Infinity
Q19. In X-ray Diffraction (XRD), the Bragg's Law, nλ = 2d sin θ, relates the wavelength of the X-rays (λ), the interplanar spacing (d), and the angle of diffraction (θ). This law is fundamental for:

Determining the elemental composition of a sample. Identifying the crystalline structure of materials. Measuring the absorbance of X-rays. Detecting radioactivity in a sample.
Q20. Graham's Law of Diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of its:

Temperature Pressure Molar mass Volume

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