Question : Identify the sentence that correctly uses the indefinite article.
Option 1: Cloud seeding involves use of chemicals that target rain-bearing clouds above a catchment area such as an river, reservoir or an lake.
Option 2: Cloud seeding involves use of chemicals that target rain-bearing clouds above a catchment area such as a river, reservoir or a lake.
Option 3: Cloud seeding involves use of chemicals that target rain-bearing clouds above an catchment area such as a river, reservoir or an lake.
Option 4: Cloud seeding involves use of chemicals that target rain-bearing clouds above an catchment area such as an river, reservoir or a lake.
Correct Answer: Cloud seeding involves use of chemicals that target rain-bearing clouds above a catchment area such as a river, reservoir or a lake.
Solution : The second option is correct.
Explanation: The indefinite article (a) is used before consonant sounds, and (an) is used before vowel sounds. In this case, the catchment area begins with a consonant sound, so the correct article is a. Additionally, the same principle applies to the subsequent nouns river, reservoir, and lake. Each of these nouns begins with a consonant sound, so a is the correct choice.
Therefore, the sentence that uses the article correctly is: Cloud seeding involves the use of chemicals that target rain-bearing clouds above a catchment area such as a river, reservoir, or lake.
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Question : The chemicals most commonly used for cloud seeding or artificial rain making is/are:
Option 1: silver iodide
Option 2: sodium chloride
Option 3: dry ice or frozen carbon dioxide
Option 4: All the above
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Option 1: formation of artificial rain
Option 2: abnormally heavy downpours of rain, associated with thunderstorms
Option 3: presence of scattered flakes of clouds in the sky
Option 4: sowing of seeds of a crop in a cloudy weather
Question : Lake formed in a cut-off river, meander is called:
Option 1: Playa Lake
Option 2: Meteoric Lake
Option 3: Ox-Bow Lake
Option 4: Crater Lake
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Option 1: A practice of chemicals, insecticides and pesticides
Option 2: The custom of chemicals, insecticides and pesticides
Option 3: Consumption of chemicals, insecticides and pesticides
Option 4: The usage of chemicals, insecticides and pesticides
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Option 1: Jhelum river
Option 2: Indus river
Option 3: Ghaghara river
Option 4: Beas river
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