Practice Test


Q1) White lung cancer is caused by Show Answer


Q2) London smog is found in Show Answer


Q3) Which of the following is not regarded as a pollutant ? Show Answer


Q4) Which of the following is a secondary pollutant ? Show Answer


Q5) Which of the following is a primary pollutant ? Show Answer


Q6) In which of the following regions Hydrogen and Helium are found ? Show Answer


Q7) The region containing water vapour is Show Answer


Q8) The region greatly affected by air pollution is Show Answer


Q9) Which of the following is the coldest region ? Show Answer


Q10) The uppermost region of the atmosphere is Show Answer


Q11) Which of the following chemical is released from Chlorofluorocarbons and is harmful to ozone ? Show Answer


Q12) The brown, hazy fumes of photochemical smog are due to Show Answer


Q13) Which of the following statements about control of particulate pollution is not correct ? Show Answer


Q14) Which of the following is a sink of CO ? Show Answer


Q15) Water is often treated with chlorine to Show Answer


Q16) Most abundant water pollutant is Show Answer


Q17) Addition of phosphate fertilizers into water leads to Show Answer


Q18) The greenhouse effect is caused by Show Answer


Q19) An example of major air pollutant is Show Answer


Q20) Ozone is an important constituent of stratosphere because it Show Answer


Q21) Which of the following is best conductor of electricity ? Show Answer


Q22) Water is a highly effective coolant for a car engine because : Show Answer


Q23) Air is completely removed from an electric bulb to prevent : Show Answer


Q24) Why is it easier to swim in a sea than a river ? Show Answer


Q25) Soda water contains : Show Answer


Q26) When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with Show Answer


Q27) Which of the following is used as a disinfectant in water treatment ? Show Answer


Q28) The solubility of NaCl is Show Answer


Q29) Which of the following is not true ? Show Answer


Q30) The molarity of pure water at 277 K is Show Answer


Q31) Temporary hardness of water is due to the presence of Show Answer


Q32) Which of the following pairs of molecules have practically the same mass ? Show Answer


Q33) Hard water when passed through ion exchange resin containing, RCOOH groups, becomes free from Show Answer


Q34) Deionized water is obtained by passing hard water through Show Answer


Q35) Deuterium or heavy hydrogen is prepared Show Answer


Q36) Heavy water is manufactured Show Answer


Q37) Which of the following is used as a moderator in nuclear reactors ? Show Answer


Q38) Permutit is a technical name given to Show Answer


Q39) The correct increasing order of abundance of the main components of air is Show Answer


Q40) Which one of the following reactions occurs as a result of lightening ? Show Answer


Q41) Which component present in air as a pollutant is responsible for acid rain ? Show Answer


Q42) The ozone layer is mainly damaged by Show Answer


Q43) Air is completely removed from an electric bulb to prevent Show Answer


Q44) Which is not a green house gas ? Show Answer


Q45) Which of the following gases present in air protects life on the earth from the harmful effects of UV rays from the Sun ? Show Answer


Q46) Main source of lead in air is from Show Answer


Q47) Higher concentration of nitrogen dioxide in atmosphere air causes Show Answer


Q48) Gradual warming of the atmosphere due to trapping of long wave radiations is called Show Answer


Q49) Which of the following is best conductor of electricity ? Show Answer


Q50) Sea water is saltier than rain water because Show Answer


Q51) Water is a good solvent of ionic salts because Show Answer


Q52) Water has abnormally high boiling point because Show Answer


Q53) Point out the incorrect one Show Answer


Q54) Temporary hardness of water can be removed Show Answer


Q55) The exhausted permutit is generally regenerated by percolating through it a solution of Show Answer


Q56) When zeotile which is hydrated sodium aluminium silicate, is treated with hard water the sodium ions are exchanged with Show Answer


Q57) Which of the following is used as a disinfectant in water treatment ? Show Answer


Q58) Water is a effective coolant for a car engine because Show Answer


Q59) Permanent hardness of water may be removed by the addition of Show Answer


Q60) ASSERTION :
hardness of water is expressed in parts per million.
REASON :
Very small amounts of calcium and magnesium salts are dissolved in water. Show Answer


Q61) ASSERTION :
Water is good solvent for ionic compounds, salts which are highly ionised when dissolved in water.
REASON :
Water has very high degree of ionization. Show Answer


Q62) ASSERTION :
The atmosphere is heated more by terrestrial radiations than by incoming solar radiation.
REASON :
Water and Carbon dioxide in the atmosphere are good absorbers of short wave radiations. Show Answer


Q63) ASSERTION :
Water is a polar compound.
REASON :
There is extensive association in water molecules due to hydrogens bonding. Show Answer


Q64) Which of the following statements in connection with the properties of water is/are correct ?
(I) Water has higher specific heat in comparison with other liquid.
(II) Water has no dipole moment.
(III) Water has low heat of vaporization.
Select the correct answer using the codes given below : Show Answer


Q65) The bond which is present between water molecules is Show Answer


Q66) Water is a good solvent. This is due to high Show Answer


Q67) Which of the following statements regarding the property of hard water is/are correct ?
(I) Temporary hardness of water is due to the presence of soluble magnesium and calcium hydrogen carbonate.
(II) Temporary hardness of water can be removed by boiling.
(III) Calgon's method is applied to remove temporary hardness of water.
(IV) Permanent hardness of water is removed by Clark's method.
Select the correct answer using the codes given below : Show Answer


Q68) STATEMENT I :
Hard water does not give lather with soap.
STATEMENT II :
Calcium and magnesium salts present in hard water soap. Show Answer


Q69) STATEMENT I :
Water is a high boiling point liquid.
STATEMENT II :
Hydrogen bonding in water is responsible for high, boiling point of water. Show Answer


Q70) Deionised water is produced by Show Answer


Q71) Which one among the following methods is not effective in removing arsenic from contaminated ground water ? Show Answer


Q72) Which of the statements given below is/are correct ?
Permanent hardness of water is due to the presence of soluble.
(I) Chloride of calcium
(II) Bicarbonate of calcium
(III) Sulphate of magnesium
(IV) Bicarbonate of magnesium
Select the correct answer using the code given below : Show Answer


Q73) Consider the following statements with regard to the properties of water.
(I) Water is a good solvent for ionic compound but poor solvent for covalent compound.
(II) Water is a good solvent for covalent compound but ppor solvent for ionic compound.
(III) Water has maximum density at the temperature 277 K.
Which of the statements given above are correct ? Show Answer


Q74) Which one of the following statements is not correct ? Show Answer


Q75) Neutral water with pH about 7 becomes slightly acidic when aerated. This is because Show Answer


Q76) Which one of the following gases, present in the air near the surface of the Earth, has maximum concentrations ? Show Answer


Q77) Equal quantities (50 mL) of the following four sample of water are placed in four breaks of 100mL capacity. Their boiling points are determined accurately using the same thermometer. Which sample of water will have the lowermost boiling point as compared to other three samples ? Show Answer


Q78) Which one among the following is used as a moderator in nuclear reactors ? Show Answer


Q79) Which among the following elements (metals) pollutes the air of a city having large number of automobiles ? Show Answer


Q80) Alum is used as Show Answer