Q1. The gas that causes suffocation and death when coal or coke is burnt in a closed room is
(a) Methane
(b) Ethane
(c) Carbon monoxide
(d) Carbon di-oxide
Q2. Atoms having the same number of protons but different number of neutrons are called:
(a) Isotopes
(b) Cations
(c) Higgs-boson
(d) Anions
Q3. The most suitable unit for expressing nuclear radius is :
(a) nanometer
(b) Fermi
(c) angstrom
(d) micron
Q4. The most abundant element by number in the living system is :
(a) Nitrogen
(b) Hydrogen
(c) Oxygen
(d) Carbon
Q5. The main component of liquid bleach is:
(a) Sodium chloride
(b) Sodium hypochlorite
(c) Hydrochloric acid
(d) Sodium hypochlorate
Q6. The term ‘brown air’ is used for
(a) Acid fumes
(b) Photochemical smoke
(c) Sulphurous smog
(d) Industrial smog
Q7. Most commonly used bleaching agent is
(a) Sodium chloride
(b) Alcohol
(c) Carbon dioxide
(d) Chlorine
Q8. The green colour seen in fire work displays is due to the chloride salt of :
(a) Sodium
(b) Strontium
(c) Barium
(d) Calcium
Q9. An important green-house gas other than methane being produced from the agricultural fields is
(a) Nitrous oxide
(b) Ammonia
(c) Sulphur dioxide
(d) Arsine
Q10. Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?
(a) Chlorofluorocarbons
(b) Nitrous oxide
(c) Sulphur dioxide
(d) Carbon dioxide
Q11. Acid Rain is caused due to pollution of atmosphere by
(a) Oxides of nitrogen and phosphorus
(b) Oxides of carbon and nitrogen
(c) Oxides of nitrogen and sulphur
Q12. Which one of the following is found is Vinegar?
(a) Acetic acid
(b) Propionic acid
(c) Formic acid
(d) Butyric acid
Q13. Which element behaves chemically both as metal and non-metal?
(a) Argon
(b) Boron
(c) Xenon
(d) Carbon
Q14. Which of the following elements does not exhibit natural radioactivity?
(a) Uranium
(b) Thorium
(d) Polonium
Q15. Nitrogen in water is commonly found in the form of
(a) Nitrous oxide
(b) Nitrate
(c) Nitric oxide
(d) Nitrite
CRACK SSC CGL 2017
