Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is?

Neutralised by alkali treatment
Left as such without any treatment
Diluted with fresh water to reduce its acidity
None of these

LohaHridoy

5 views

2025-01-04 04:42

1 Answers

AhmedNazir

Answer: Option 1

Let'

5 views Answered 2022-09-01 13:21

Related Questions

The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to (where r is the distance of’the particle from centre of the earth)?

1 Answers 6 Views

Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should all the students graduating in any discipline desirous of pursuing post-graduation of the subjects of their choice be allowed to enrol in the post-graduate courses Arguments : I. Yes. The students are the best judge of their capabilities and there should not be restrictions for joining post-graduate courses. II. No. The students need to study relevant subjects in graduate courses to enrol in post-graduate courses and the students must fulfil such conditions. III. No. There are not enough institutes offering post-graduate courses which can accommodate all the graduates desirous of seeking post-graduate education of their own choice.?

1 Answers 6 Views

Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should India immediately stop digging coal from its mines Arguments : I. Yes. The present stock of coal will not last long if we continue mining at the present rate. II. No. We do not have alternate energy source of sufficient quantity. III. No. This will put millions of people at a disadvantage and their lives will get adversely affected and also the industry.?

1 Answers 5 Views

Statement : The weather bureau has through a recent bulletin forecast heavy rainfall during the next week which may cause water logging in several parts of the city. Courses of Action : I. The bulletin should be given wide publicity through the mass media. II. The civic authority should keep in readiness the pumping system for removal of water from these parts. III. The people should be advised to stay indoors during the period.?

1 Answers 5 Views

Statement : The meteorological department has issued a notification forecasting less rainfall during next year's monsoon. Courses of Action : I. The government should immediately set up a water authority for proper management of water resources. II. The water supply authorities should be asked to implement reduction in regular water supply to tackle the situation. III. The farmers should be advised to cultivate alternate crops which require less water during the coming months.?

1 Answers 9 Views

Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer : I. The vegetables price in the local market have increase manifold during the past few days. II. Incessant rains have created flood like situation in most rural parts of the State.?

1 Answers 7 Views

Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer : I. There is increase in water level of all the water tanks supplying drinking water to the city during the last fortnight. II. Most of the trains were cancelled last week due to water-logging on the tracks.?

1 Answers 5 Views

Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer : I. The committee appointed by the Government on the fee structure of the professional courses has drastically reduced the fees of various courses in comparison to those charged in the last year. II. The parents of aspiring students seeking admission to professional courses had launched a severe agitation protesting against the high fees charged by the professional institutes and the admission process was delayed considerably.?

1 Answers 8 Views

Which of the following are true with regard to temperature control of the atmosphere of a given place I. The major temperature contrasts on earth's surface are between land masses and oceans II. During night, the water surface cools more rapidly than the land surface III. Temperature generally decreases with latitude on either side of the equator IV. Temperature rises to a maximum during summer and falls to a minimum during winter?

1 Answers 8 Views

A flat-bed plotter uses a pen which moves in two directions across a piece of paper fixed on a flat-bed. Can you tell who controls the movements of this pen?

1 Answers 6 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)