Chemistry in everyday life

21. A sample of ‘soft soap’ contains A. caesium B. potassium C. calcium D. magnesium

caesium
potassium
calcium
magnesium

Detailed SolutionA sample of ‘soft soap’ contains A. caesium B. potassium C. calcium D. magnesium

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22. Consider the following statements. 1. A chalcogenide glass is a glass containing sulphur, selenium or tellurium. 2. Chalcogenide glass form the basis of re-writable CD and DVD solid-state memory technology. Which of the statement(s) given above is/are correct? A. Only 1 B. Only 2 C. Both 1 and 2 D. Neither 1 nor 2

Only 1
Only 2
Both 1 and 2
Neither 1 nor 2

Detailed SolutionConsider the following statements. 1. A chalcogenide glass is a glass containing sulphur, selenium or tellurium. 2. Chalcogenide glass form the basis of re-writable CD and DVD solid-state memory technology. Which of the statement(s) given above is/are correct? A. Only 1 B. Only 2 C. Both 1 and 2 D. Neither 1 nor 2

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23. Which form of nitrogen is available in urea? A. Amide B. Ammoniacal C. Nitrate D. Nitrite

Amide
Ammoniacal
Nitrate
Nitrite

Detailed SolutionWhich form of nitrogen is available in urea? A. Amide B. Ammoniacal C. Nitrate D. Nitrite

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24. Which of the following vegetable oils does not contain essential fatty acids? A. Sunflower oil B. Mustard oil C. Coconut oil D. Groundnut oil

Sunflower oil
Mustard oil
Coconut oil
Groundnut oil

Detailed SolutionWhich of the following vegetable oils does not contain essential fatty acids? A. Sunflower oil B. Mustard oil C. Coconut oil D. Groundnut oil

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25. Glycol is added to aviation gasoline because it A. reduces evaporation of petrol B. increase efficiency of petrol C. prevents freezing of petrol D. reduce consumption of petrol

reduces evaporation of petrol
increase efficiency of petrol
prevents freezing of petrol
reduce consumption of petrol

Detailed SolutionGlycol is added to aviation gasoline because it A. reduces evaporation of petrol B. increase efficiency of petrol C. prevents freezing of petrol D. reduce consumption of petrol

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26. Rock salt is a mineral containing A. potassium B. magnesium C. sodium D. iron

potassium
magnesium
sodium
iron

Detailed SolutionRock salt is a mineral containing A. potassium B. magnesium C. sodium D. iron

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27. Which one of the following is the reason for keeping the chloroform in brown-tinted glass containers? A. Its brilliance colour hurts eyes B. Its deep red colour is piercing C. With UV-rays and O2, it forms poisonous gas phosgene D. With IR-rays, it forms a poisonous cyanide

Its brilliance colour hurts eyes
Its deep red colour is piercing
With UV-rays and O2, it forms poisonous gas phosgene
With IR-rays, it forms a poisonous cyanide

Detailed SolutionWhich one of the following is the reason for keeping the chloroform in brown-tinted glass containers? A. Its brilliance colour hurts eyes B. Its deep red colour is piercing C. With UV-rays and O2, it forms poisonous gas phosgene D. With IR-rays, it forms a poisonous cyanide

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28. Quality diesel is measured in terms of its A. cetane number B. octane number C. gold number D. avogadro number

cetane number
octane number
gold number
avogadro number

Detailed SolutionQuality diesel is measured in terms of its A. cetane number B. octane number C. gold number D. avogadro number

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29. Which one of the following organic compounds has fruity smell? A. Alcohol B. Aldehyde C. Ester D. Ether

Alcohol
Aldehyde
Ester
Ether

Detailed SolutionWhich one of the following organic compounds has fruity smell? A. Alcohol B. Aldehyde C. Ester D. Ether

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30. Which of the following is a natural dye? A. Crystal violet B. Aniline blue C. Alizarin D. Phenolphthalein

Crystal violet
Aniline blue
Alizarin
Phenolphthalein

Detailed SolutionWhich of the following is a natural dye? A. Crystal violet B. Aniline blue C. Alizarin D. Phenolphthalein

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