Chemistry Questions for SSC CHSL 2018
(a) J.J. Thomson
(b) Chadwick
(c) Rutherford
(d) Newton
Q2. Change of water into the vapour is called-
(a) Natural
(b) Physical
(c) Chemical
(d) Biological
Q3. Which one of the following is the hardest metal?
(a) Gold
(b) Iron
(c) Platinum
(d) Silver
Q4. These days yellow lamps are frequently used as street light. Which one of the following us used in these lamps:
(a) Sodium
(b) Neon
(c) Hydrogen
(d) Nitrogen
Q5. In which of the following industries is mica used as a raw material-
(a) Iron and steel
(b) Toys
(c) Glass and pottery
(d) Electrical
Q6. Which of the following is mainly used for the production of Aluminum?
(a) Hematite
(b) Lignite
(c) Bauxite
(d) Magnetite
Q7. Solder used in soldering metal pieces consists of any alloy of:
(a) Tin and Zinc
(b) Tin and Lead
(c) Tin, Zinc and Copper
(d) Tin, Lead and Zinc
Q8. Which of the following do not consist carbon?
(a) Diamond
(b) Graphite
(c) coal
(d) None of these
Q9. Which one of the following fuels causes minimum air pollution?
(a) Kerosene oil
(b) Hydrogen
(c) Coal
(d) Diesel
Q10. Which gas is used in the purification of drinking water?
(a) Helium
(b) Chlorine
(c) Fluorine
(d) Carbon Dioxide
Q11. Which is used as laughing gas is-
(a) Nitrous Oxide
(b) Nitrogen dioxide
(c) Nitrogen Trioxide
(d) Nitrogen Tetra Oxide
Q12. What is Nila thotha?
(a) Copper Sulphate
(b) Calcium Sulphate
(c) Iron Sulphate
(d) Sodium Sulphate
Q13. Which is the fundamental element of all organic compounds?
(a) Nitrogen
(b) Oxygen
(c) Carbon
(d) Brimstone
Q14. Which acid is found in Vinegar?
(a) Lactic Acid
(b) Citric Acid
(c) Malic Acid
(d) Acetic Acid
Q15. To avoid ‘knocking’ of the engine of a car, which one of the following is used as an anti-knocking agent?
(a) Ethyl alcohol
(b) Butane
(c) Lead Tetra Ethyl
(d) White Petrol
Solutions
- S1. Ans. (b) - Neutron is a neutral particle which has no electrical charge. It was discovered by Chadwick in 1932.
- S2. Ans. (b) - Change of water into the vapour is called a physical change.
- S3. Ans. (c) - Among non-metals, diamond is the hardest whereas, among the metals, platinum is the hardest.
- S4. Ans. (a) - There are 2 types of street light bulbs are used by municipalities. They are sodium vapor and mercury vapor bulbs. The mercury vapor bulbs are usually a white ambient light and sodium on orange/yellow light.
- S5. Ans. (d) - Mica is good conductor of heat and bad conductor of electricity so mica use in electrical industry.
- S6. Ans. (c) - Bauxite is an ore of Aluminum, which is found in the form of Hydrated Aluminium Oxides.
- S7. Ans. (b) - The common composition of solder is 32% Tin, 68% Lead. This combination has a low melting point and is useful for soldering components that are sensitive to heat.
- S8. Ans. (d) - Diamond is an additional form of Carbon. Its relative density is 3.5 Graphite is a slaty-black coloured smooth and brightly organic matter of relative density 2.25, while coal is a solid organic matter used as fuel. All the three are consist of carbon.
- S9. Ans. (b) - Hydrogen is the purest combustion fuel. Water is generated from burning of Hydrogen. While coal, kerosene oil and diesel are known as fossil fuel which generates, Carbon dioxide and many other harmful gases when it burns.
- S10. Ans. (b) - Chlorine is presently an important chemical for water purification (such as in water treatment plants), disinfectants and in bleach.
- S11. Ans. (a) - Nitrous Oxide (N2O) is also known as laughing gas. It is a colourless gas with a sweet odour and taste. It is also used as the anesthetic gas.
- S12. Ans. (a) - Nila thotha is a compound of Copper and sulphate. Its chemical formula is CuSO4.5H2O.
- S13. Ans. (c) - The organic compounds are a large class of chemical compounds in which one or more atoms of carbon are covalently linked atoms of other elements, most commonly Hydrogen, Oxygen or Nitrogen.
- S14. Ans. (d) - Acetic acid is the chief component of vinegar. Vinegar is liquid consisting mainly of acetic acid (CH3COOH) and water.
- S15. Ans. (c) - Tetraethyl Lead (CH3CH2)4Pb is the chief antiknock agent for automotive gasoline or petrol.
