Consider the following statements : Glass can be etched or scratched by I. diamond. II. hydrofluoric acid. III. aquaregia. IV. cone, sulphuric acid. Which of these statements are correct ?
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Assertion (A) : To dilute sulphuric acid, acid is added to water and not water to acid. Reason (R) : Specific heat of water is quite large.
Assertion (A) : To dilute sulphuric acid, acid is added to water and not water to acid. Reason (R) : Specific heat of water is quite large.
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Cobalt-60 is commonly used in radiation therapy because it emits
Cobalt-60 is commonly used in radiation therapy because it emits
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Which one of the following types of coal contains a higher percentage of carbon than the rest
Which one of the following types of coal contains a higher percentage of carbon than the rest ?
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Which one of the following is a useful functional association between fungi and the roots of higher plants
Which one of the following is a useful functional association between fungi and the roots of higher plants ?
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Which one of the following agricultural practices is eco-friendly
Which one of the following agricultural practices is eco-friendly ?
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Strips of two metals A and B are firmly joined together as shown in the figure(Before Heating) On heating, A expands more than B does. If this joined strip is heated, then it will appear as
Strips of two metals A and B are firmly joined together as shown in the figure(Before Heating) On heating, A expands more than B does. If this joined strip is heated, then it will appear as